Chemistry › Organic Chemistry

Surfactants and Colloidal Systems

Works Count: 64869

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This cluster of papers focuses on the aggregation, self-assembly, and interfacial behavior of surfactants, including topics such as micelle formation, wormlike micelles, ionic liquids, and microemulsions. It also covers the adsorption mechanisms of surfactants at air-water interfaces and the viscoelastic properties of surfactant solutions.

Keywords

Surfactants; Micelles; Self-assembly; Wormlike micelles; Ionic liquids; Microemulsions; Gemini surfactants; Adsorption; Viscoelasticity; Interfacial phenomena

Handbook of applied surface and colloid chemistry

2002-01-01

Krister Holmberg

Contributors List. Foreword. Preface. Part 1: Surface Chemistry in Important Technologies. Surface Chemistry in Pharmacy (Martin Malmsten). Surface Chemistry in Food and Feed (Bjorn Bergenstahl). Surface Chemistry in Detergency (Wolfgang … Contributors List. Foreword. Preface. Part 1: Surface Chemistry in Important Technologies. Surface Chemistry in Pharmacy (Martin Malmsten). Surface Chemistry in Food and Feed (Bjorn Bergenstahl). Surface Chemistry in Detergency (Wolfgang von Rybinski). Surface Chemistry in Agriculture (Tharwat F. Tadros). Surface and Colloid Chemistry in Photographic Technology (John Texter). Surface Chemistry in Paints (Krister Holmberg). Surface Chemistry in Paper (Fredrick Tiberg et al). Surface Chemistry in the Polymerization of Emulsion (Klaus Tauer). Colloidal Processing of Ceramics (Lennart Bergstrom). Surface Chemistry in Disperson, Flocculation and Flotation (Brij M. Moudgil eet al). Surface Chemistry in the Petroleum Industry (James R Kanicky et al). Part 2: Surfactants. Anionic Surfactants (Antje Schmalstieg and Guenther W. Wasow). Nonionic Surfactants (Michael F. Cox). Cationic Surfactants (Dale S. Steichen). Zwitterionic and Amphoteric Surfactants (David T. Floyd et al). Polymeric Surfactants (Tharwat F. Tadros). Speciality Surfactants (Krister Holmberg). Hydrotropes (Anna Matero). Physico-Chemical Properties of Surfactants (Bjorn Lindman). Surfactant-Polymer Systems (Bjorn Lindman). Surfactants Liquid Crystals (Syed Hussan et al). Environmental Aspects of Surfactants (Lothar Huber and Lutz Nitschke). Molecular Dynamics Computer Simulations of Surfactants (Hubert Kuhn and Heinz Rehage). Part 3: Colloidal Systems and Layer Structures at Surfaces. Solid Dispersons (Staffan Wall). Foams and Foaming (Robert J. Pugh). Vesicles (Brian H. Robinson and Madeleine Rogerson). Microemulsions (Klaus Wormuth et al). Langmuir-Blodgett Films (Hubert Motschmann and Helmuth Mohwald). Self-Assembling Monolayers: Alkaline Thiols on Gold (Dennis S. Everhart). Part 4: Phenomena in Surface Chemistry. Wetting, Spreading and Penetration (Karina Grundke). Foam Breaking in Aqueous Systems (Robert J. Pugh). Solubilization (Thomas Zemb and Fabienne Testard). Rheological Effects in Surfactant Phases (Heinz Hoffmann and Werner Ulbricht). Part 5: Analysis and Characterization in Surface Chemistry Measuring Equilibrium Surface Tensions (Michael Mulqueen and Paul D.T. Huibers). Measuring Dynamic Surface Tensions (Reinhard Miller et al). Determining Critical Micelle Concentration (Alexander Patist). Measuring Contact Angle (C.N. Catherine Lam et al). Measuring Micelle Size and Shape (Magnus Nyden). Identification of Lyotropic Liquid Crystalline Mesophases (Stephen T. Hyde). Characterization of Microemulsion Structure (Ulf Olsson). Measuring Particle Size by Light Scattering (Michael Borkovec). Measurement of Electrokinetic Phenomena in Surface Chemistry (Norman L. Burns). Measuring Interactions between Surfaces (Per M Claesson and Mark W. Rutland). Measuring the Forces and Stability of Thin-Liquid Films (Vance Bergeon). Measuring Adsorption (Bengt Kronberg). Index.

Surfactants in Solution

1989-01-01

Kashmiri Lal Mittal

Liquids and Liquid Mixtures

1982-01-01

J. S. Rowlinson

Spontaneous Vesicle Formation in Aqueous Mixtures of Single-Tailed Surfactants

1989-09-22

Eric W. Kaler , A. K. Murthy , B. E. Rodriguez +1 more

Spontaneous, single-walled, equilibrium vesicles can be prepared from aqueous mixtures of simple, commercially available, single-tailed cationic and anionic surfactants. Vesicle size, surface charge, or permeability can be readily adjusted by … Spontaneous, single-walled, equilibrium vesicles can be prepared from aqueous mixtures of simple, commercially available, single-tailed cationic and anionic surfactants. Vesicle size, surface charge, or permeability can be readily adjusted by varying the ratio of anionic to cationic surfactant. Vesicle formation apparently results from the production of anion-cation surfactant pairs that then act as double-tailed zwitterionic surfactants. These vesicles are quite stable in comparison to conventional vesicles prepared by mechanical disruption of insoluble liquid crystalline dispersions.

Skin penetration enhancers

2013-02-24

Majella E. Lane

On the Origins of Morphological Complexity in Block Copolymer Surfactants

2003-04-17

Sumeet Jain , Frank S. Bates

Amphiphilic compounds such as lipids and surfactants are fundamental building blocks of soft matter. We describe experiments with poly(1,2-butadiene-b-ethylene oxide) (PB-PEO) diblock copolymers, which form Y-junctions and three-dimensional networks in … Amphiphilic compounds such as lipids and surfactants are fundamental building blocks of soft matter. We describe experiments with poly(1,2-butadiene-b-ethylene oxide) (PB-PEO) diblock copolymers, which form Y-junctions and three-dimensional networks in water at weight fractions of PEOintermediate to those associated with vesicle and wormlike micelle morphologies. Fragmentation of the network produces a nonergodic array of complex reticulated particles that have been imaged by cryogenic transmission electron microscopy. Data obtained with two sets of PB-PEOcompounds indicate that this type of self-assembly appears above a critical molecular weight. These block copolymers represent versatile amphiphiles, mimicking certain low molecular weight three-component (surfactant/water/oil) microemulsions, without addition of a separate hydrophobe.

Iron Oxide Nanoparticles for Sustained Delivery of Anticancer Agents

2005-04-21

Tapan K. Jain , Marco A. Morales , Sanjeeb Kumar Sahoo +2 more

We have developed a novel water-dispersible oleic acid (OA)-Pluronic-coated iron oxide magnetic nanoparticle formulation that can be loaded easily with high doses of water-insoluble anticancer agents. Drug partitions into the … We have developed a novel water-dispersible oleic acid (OA)-Pluronic-coated iron oxide magnetic nanoparticle formulation that can be loaded easily with high doses of water-insoluble anticancer agents. Drug partitions into the OA shell surrounding iron oxide nanoparticles, and the Pluronic that anchors at the OA−water interface confers aqueous dispersity to the formulation. Neither the formulation components nor the drug loading affected the magnetic properties of the core iron oxide nanoparticles. Sustained release of the incorporated drug is observed over 2 weeks under in vitro conditions. The nanoparticles further demonstrated sustained intracellular drug retention relative to drug in solution and a dose-dependent antiproliferative effect in breast and prostate cancer cell lines. This nanoparticle formulation can be used as a universal drug carrier system for systemic administration of water-insoluble drugs while simultaneously allowing magnetic targeting and/or imaging. Keywords: Sustained release; water-insoluble drugs; cellular uptake; breast cancer; targeting; tumor therapy; magnetic nanoparticles

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The conformation of membranes

1991-02-01

Reinhard Lipowsky

Non-ionic surfactant based vesicles (niosomes) in drug delivery

1998-10-01

Ijeoma F. Uchegbu , Suresh P. Vyas

Structure and design of polymeric surfactant-based drug delivery systems

2001-06-01

Vladimir P. Torchilin

Mouvement Brownien d'un ellipsoide (II). Rotation libre et dépolarisation des fluorescences. Translation et diffusion de molécules ellipsoidales

1936-01-01

Francis Perrin

Sommaire.2014 Etude analytique du mouvement brownien de rotation d'un ellipsoïde à partir d'une équation établie antérieurement (1).Application au calcul de la dépolarisation, résultant des rotations des molécules excitées pour une … Sommaire.2014 Etude analytique du mouvement brownien de rotation d'un ellipsoïde à partir d'une équation établie antérieurement (1).Application au calcul de la dépolarisation, résultant des rotations des molécules excitées pour une fluorescence émise par des molécules ellipsoïdales en solution.Equation aux dérivées partielles du mouvement brownien d'ensemble (rotation et translation) d'un ellipsoïde.Etude de la diffusion de molécules ellipsoïdales dissoutes : anisotropie locale résultant de la diffusion; 2014 existence, pour les faibles gradients de concentration, d'un coefficient de diffusion limite.Formules et graphique donnant les valeurs de ce coefficient de diffusion pour les ellipsoïdes de révo- lution.

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Structure determination of a tetrasaccharide: transient nuclear Overhauser effects in the rotating frame

1984-02-01

Aksel A. Bothner‐By , Richard Stephens , Jumee Lee +2 more

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure determination of a tetrasaccharide: transient nuclear Overhauser effects in the rotating frameAksel A. Bothner-By, R. L. Stephens, Jumee Lee, Christopher D. Warren, and R. W. JeanlozCite … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure determination of a tetrasaccharide: transient nuclear Overhauser effects in the rotating frameAksel A. Bothner-By, R. L. Stephens, Jumee Lee, Christopher D. Warren, and R. W. JeanlozCite this: J. Am. Chem. Soc. 1984, 106, 3, 811–813Publication Date (Print):February 1, 1984Publication History Published online1 May 2002Published inissue 1 February 1984https://pubs.acs.org/doi/10.1021/ja00315a069https://doi.org/10.1021/ja00315a069research-articleACS PublicationsRequest reuse permissionsArticle Views1359Altmetric-Citations1560LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Theory of self-assembly of hydrocarbon amphiphiles into micelles and bilayers

1976-01-01

Jacob N. Israelachvili , D. John Mitchell , Barry W. Ninham

A simple theory is developed that accounts for many of the observed physical properties of micelles, both globular and rod-like, and of bilayer vesicles composed of ionic or zwitterionic amphiphiles. … A simple theory is developed that accounts for many of the observed physical properties of micelles, both globular and rod-like, and of bilayer vesicles composed of ionic or zwitterionic amphiphiles. The main point of departure from previous theories lies in the recognition and elucidation of the role of geometric constraints in self-assembly. The linking together of thermodynamics, interaction free energies and geometry results in a general framework which permits extension to more complicated self-assembly problems.

Solution Chemistry of Surfactants

1980-06-01

K. L. Mittal , T. A. Roth

of Volume 1.- I. General Overview Papers.- Ionic Interaction and Phase Stability.- Comparative Effects of Chemical Structure and Environment on the Adsorption of Surfactants at the L/A Interface and on … of Volume 1.- I. General Overview Papers.- Ionic Interaction and Phase Stability.- Comparative Effects of Chemical Structure and Environment on the Adsorption of Surfactants at the L/A Interface and on Micellization.- Studies of Lyotropic Liquid Crystals that Align in Magnetic Fields.- Use of Surfactant and Micellar Systems in Analytical Chemistry.- Micellar Systems Studied by Positron Annihilation Techniques.- Solubilization in Aqueous Micellar Systems.- Nonionic Surfactant Micelles and Mixed Micelles with Phospholipids.- Commercial Surfactants: An Overview.- II. Thermodynamics and Kinetics of Micellization in Aqueous Media.- Direct Measurements of the Thermodynamic Properties of Surfactants.- Electrolyte Effect on Micellization.- Kinetics of Micellization.- Thermodynamics of Micelle Formation: Model Calculations for Sodium Octanoate.- Pre-Micellar Maximum in the Light Scattering from Cetyltrimethylammonium Bromide and Chloride.- Relaxation Amplitude of Non-Ionic Micelle Systems Perturbed by Solvent-Jump.- Mixed Micelle Solutions.- Anomalous Behaviour of Aromatic Alcohols on the Critical Micelle Concentrations of Cationic Surfactants.- Some Observations on the Micellar Behavior of Surfactants in Water and Aqueous Solvents.- Investigation of Aggregation Phenomena in Aqueous Sodium Dodecyl Sulfate Solutions at High NaCl Concentration by Quasielastic Light Scattering.- The Effect of Dissolved Oils and Alcohols on the CMC of Synthetic and Petroleum Sulfonates.- Application of Keto-Enol Tautomerism to the Study of Micellar Property of Surfactants.- III. Effect of Solvent and Micelles in Nonaqueous Media.- Solvent Effects on Amphiphilic Aggregation.- Association Behavior of Synthetic and Naturally Occurring Surfactants in Nonaqueous Solvents.- Ultrasonic Absorption Studies of Solutions of Ionic Amphiphiles in Organic Solvents.- Formation of Micelles of Cetyltrimethylammonium Bromide in Water-Dimethyl Sulfoxide Solutions.- Temperature Effect on Molecular Dynamics in Micellar System. Proton Spin-Lattice Relaxation Study of Cetyltrimethylammonium Bromide in Water-Dimethylsulfoxide Mixtures.- About the Contributors.

Gemini-surfactants: synthesis and properties

1991-02-01

F. M. Menger , C. A. Littau

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGemini-surfactants: synthesis and propertiesF. M. Menger and C. A. LittauCite this: J. Am. Chem. Soc. 1991, 113, 4, 1451–1452Publication Date (Print):February 1, 1991Publication History Published online1 May … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGemini-surfactants: synthesis and propertiesF. M. Menger and C. A. LittauCite this: J. Am. Chem. Soc. 1991, 113, 4, 1451–1452Publication Date (Print):February 1, 1991Publication History Published online1 May 2002Published inissue 1 February 1991https://pubs.acs.org/doi/10.1021/ja00004a077https://doi.org/10.1021/ja00004a077research-articleACS PublicationsRequest reuse permissionsArticle Views4913Altmetric-Citations857LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Low Molecular Mass Gelators of Organic Liquids and the Properties of Their Gels

1997-12-01

Pierre Térech , Richard G. Weiss

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow Molecular Mass Gelators of Organic Liquids and the Properties of Their GelsPierre Terech and Richard G. WeissView Author Information Laboratoire Physico-Chimie Moléculaire, UMR 585, Département de … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow Molecular Mass Gelators of Organic Liquids and the Properties of Their GelsPierre Terech and Richard G. WeissView Author Information Laboratoire Physico-Chimie Moléculaire, UMR 585, Département de Recherche Fondamentale sur la Matière Condensée, C.E.A.-Grenoble, 17, Rue des Martyrs, 38054 Grenoble Cédex 09, France, and Department of Chemistry, Georgetown University, Washington, DC 20057-1227 Cite this: Chem. Rev. 1997, 97, 8, 3133–3160Publication Date (Web):December 18, 1997Publication History Received10 March 1997Revised2 July 1997Published online18 December 1997Published inissue 1 December 1997https://pubs.acs.org/doi/10.1021/cr9700282https://doi.org/10.1021/cr9700282research-articleACS PublicationsCopyright © 1997 American Chemical SocietyRequest reuse permissionsArticle Views17869Altmetric-Citations2857LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Aggregation,Gelation,Gels,Liquids,Molecules Get e-Alerts

Built-Up Films of Barium Stearate and Their Optical Properties

1937-06-01

Katharine B. Blodgett , Irving Langmuir

The technique of depositing successive single layers of molecules of various stearates on a solid surface is described. Films containing 3001 layers have been built of barium-copper stearate. A photograph … The technique of depositing successive single layers of molecules of various stearates on a solid surface is described. Films containing 3001 layers have been built of barium-copper stearate. A photograph shows films built in a series of steps having intervals of 2 molecular layers. The contrast of the steps is plainly visible when the slide is illuminated by polarized light at angles near grazing incidence. By measuring the angles at which films containing known numbers of layers reflect minimum intensity of monochromatic light for the first five interference fringes, the thickness per layer and refractive index can be calculated with great accuracy. The thickness per layer of barium stearate was found to be 24.40A. The presence of traces of foreign substances in the water affect the spacing by 1 to 3 percent. The films are uniaxial crystals, the optic axis being perpendicular to the surface on which the films are built. The refractive index of the ordinary ray, ${n}_{1}$, and of the extraordinary ray in a direction perpendicular to the axis, ${n}_{3}$, are ${n}_{1}=1.491$, ${n}_{3}=1.551$. Equations are given which describe the refraction of the extraordinary ray, the intensity of the rays reflected from the upper surface and from the film solid boundary, the phase change at the boundaries, Brewster's angle, and other special properties of birefringent films. The intensity of the light and dark fringes reflected by films built on a series of glasses of known refractive indices is used as a measure of ${n}_{1}$. Skeleton films. Barium stearate films built at $\mathrm{pH}<7.0$ are composed of a mixture of stearic acid and neutral stearate. The stearic acid can be dissolved by benzene leaving a skeleton of stearate which is birefringent and has refractive indices much lower than those of the normal film. Measurements are given of a skeleton for which ${n}_{1}=1.30$, others for which ${n}_{1}=1.32$, ${n}_{3}=1.39$. Skeletons have been built having ${n}_{1}=1.25$ and 1.22. The skeleton for which ${n}_{1}=1.30$ had 99.2 percent of the thickness of the original film, although only 63.7 percent of its density.

Effect of comonomer hydrophilicity and ionization on the lower critical solution temperature of N-isopropylacrylamide copolymers

1993-05-01

H. Feil , You Han Bae , Jan Feijén +1 more

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of comonomer hydrophilicity and ionization on the lower critical solution temperature of N-isopropylacrylamide copolymersHerman Feil, You Han Bae, Jan Feijen, and Sung Wan KimCite this: Macromolecules … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of comonomer hydrophilicity and ionization on the lower critical solution temperature of N-isopropylacrylamide copolymersHerman Feil, You Han Bae, Jan Feijen, and Sung Wan KimCite this: Macromolecules 1993, 26, 10, 2496–2500Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 May 1993https://pubs.acs.org/doi/10.1021/ma00062a016https://doi.org/10.1021/ma00062a016research-articleACS PublicationsRequest reuse permissionsArticle Views4672Altmetric-Citations961LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Luminescent probes for detergent solutions. A simple procedure for determination of the mean aggregation number of micelles

1978-08-01

Nicholas J. Turro , Ahmad Yekta

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescent probes for detergent solutions. A simple procedure for determination of the mean aggregation number of micellesNicholas J. Turro and Ahmad YektaCite this: J. Am. Chem. Soc. … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescent probes for detergent solutions. A simple procedure for determination of the mean aggregation number of micellesNicholas J. Turro and Ahmad YektaCite this: J. Am. Chem. Soc. 1978, 100, 18, 5951–5952Publication Date (Print):August 1, 1978Publication History Published online1 May 2002Published inissue 1 August 1978https://pubs.acs.org/doi/10.1021/ja00486a062https://doi.org/10.1021/ja00486a062research-articleACS PublicationsRequest reuse permissionsArticle Views7264Altmetric-Citations866LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Dimeric and oligomeric surfactants. Behavior at interfaces and in aqueous solution: a review

2002-03-01

R. Zana

Poly(styrene-ethylene oxide) block copolymer micelle formation in water: a fluorescence probe study

1991-03-01

Manfred Wilhelm , Cheng Le Zhao , Yongcai Wang +5 more

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(styrene-ethylene oxide) block copolymer micelle formation in water: a fluorescence probe studyManfred Wilhelm, Cheng Le Zhao, Yongcai Wang, Renliang Xu, Mitchell A. Winnik, Jean Luc Mura, Gerard … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(styrene-ethylene oxide) block copolymer micelle formation in water: a fluorescence probe studyManfred Wilhelm, Cheng Le Zhao, Yongcai Wang, Renliang Xu, Mitchell A. Winnik, Jean Luc Mura, Gerard Riess, and Melvin D. CroucherCite this: Macromolecules 1991, 24, 5, 1033–1040Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March 1991https://pubs.acs.org/doi/10.1021/ma00005a010https://doi.org/10.1021/ma00005a010research-articleACS PublicationsRequest reuse permissionsArticle Views7709Altmetric-Citations1202LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Multiple Morphologies of "Crew-Cut" Aggregates of Polystyrene- <i>b</i> -poly(acrylic acid) Block Copolymers

1995-06-23

Lifeng Zhang , Adi Eisenberg

The observation by transmission electron microscopy of six different stable aggregate morphologies is reported for the same family of highly asymmetric polystyrene-poly-(acrylic acid) block copolymers prepared in a low molecular … The observation by transmission electron microscopy of six different stable aggregate morphologies is reported for the same family of highly asymmetric polystyrene-poly-(acrylic acid) block copolymers prepared in a low molecular weight solvent system. Four of the morphologies consist of spheres, rods, lamellae, and vesicles in aqueous solution, whereas the fifth consists of simple reverse micelle-like aggregates. The sixth consists of up to micrometer-size spheres in aqueous solution that have hydrophilic surfaces and are filled with the reverse micelle-like aggregates. In addition, a needle-like solid, which is highly birefringent, is obtained on drying of aqueous solutions of the spherical micelles. This range of morphologies is believed to be unprecedented for a block copolymer system.

Oleic acid coating on the monodisperse magnetite nanoparticles

2006-06-24

Ling Zhang , Rong He , Hongchen Gu

Gemini surfactants: a new class of self-assembling molecules

1993-11-01

F. M. Menger , C. A. Littau

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGemini surfactants: a new class of self-assembling moleculesF. M. Menger and C. A. LittauCite this: J. Am. Chem. Soc. 1993, 115, 22, 10083–10090Publication Date (Print):November 1, 1993Publication … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGemini surfactants: a new class of self-assembling moleculesF. M. Menger and C. A. LittauCite this: J. Am. Chem. Soc. 1993, 115, 22, 10083–10090Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/10.1021/ja00075a025https://doi.org/10.1021/ja00075a025research-articleACS PublicationsRequest reuse permissionsArticle Views5719Altmetric-Citations871LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Alkanediyl-.alpha.,.omega.-bis(dimethylalkylammonium bromide) surfactants. 1. Effect of the spacer chain length on the critical micelle concentration and micelle ionization degree

1991-06-01

R. Zana , Mohamed Benrraou , Roger M. Rueff

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkanediyl-.alpha.,.omega.-bis(dimethylalkylammonium bromide) surfactants. 1. Effect of the spacer chain length on the critical micelle concentration and micelle ionization degreeR. Zana, M. Benrraou, and R. RueffCite this: Langmuir … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkanediyl-.alpha.,.omega.-bis(dimethylalkylammonium bromide) surfactants. 1. Effect of the spacer chain length on the critical micelle concentration and micelle ionization degreeR. Zana, M. Benrraou, and R. RueffCite this: Langmuir 1991, 7, 6, 1072–1075Publication Date (Print):June 1, 1991Publication History Published online1 May 2002Published inissue 1 June 1991https://pubs.acs.org/doi/10.1021/la00054a008https://doi.org/10.1021/la00054a008research-articleACS PublicationsRequest reuse permissionsArticle Views5206Altmetric-Citations1000LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Microemulsions and the flexibility of oil/water interfaces

1982-06-01

P. G. de Gennes , C. Taupin

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicroemulsions and the flexibility of oil/water interfacesP. G. De Gennes and C. TaupinCite this: J. Phys. Chem. 1982, 86, 13, 2294–2304Publication Date (Print):June 1, 1982Publication History Published … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicroemulsions and the flexibility of oil/water interfacesP. G. De Gennes and C. TaupinCite this: J. Phys. Chem. 1982, 86, 13, 2294–2304Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https://pubs.acs.org/doi/10.1021/j100210a011https://doi.org/10.1021/j100210a011research-articleACS PublicationsRequest reuse permissionsArticle Views4967Altmetric-Citations1141LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts

Formation and stability of nano-emulsions

2003-12-17

Tharwat F. Tadros , P. Izquierdo , Jordi Esquena +1 more

Micellization of Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Triblock Copolymers in Aqueous Solutions: Thermodynamics of Copolymer Association

1994-04-01

Paschalis Alexandridis , Josef F. Holzwarth , T. Alan Hatton

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicellization of Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Triblock Copolymers in Aqueous Solutions: Thermodynamics of Copolymer AssociationPaschalis Alexandridis, Josef F. Holzwarth, and T. Alan HattonCite this: Macromolecules 1994, 27, … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicellization of Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Triblock Copolymers in Aqueous Solutions: Thermodynamics of Copolymer AssociationPaschalis Alexandridis, Josef F. Holzwarth, and T. Alan HattonCite this: Macromolecules 1994, 27, 9, 2414–2425Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 April 1994https://pubs.acs.org/doi/10.1021/ma00087a009https://doi.org/10.1021/ma00087a009research-articleACS PublicationsRequest reuse permissionsArticle Views10456Altmetric-Citations1648LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Theory, Production and Mechanism of Formation of Monodispersed Hydrosols

1950-11-01

Victor K. LaMer , R.H. Dinegar

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory, Production and Mechanism of Formation of Monodispersed HydrosolsVictor K. LaMer and Robert H. DinegarCite this: J. Am. Chem. Soc. 1950, 72, 11, 4847–4854Publication Date (Print):November 1, … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory, Production and Mechanism of Formation of Monodispersed HydrosolsVictor K. LaMer and Robert H. DinegarCite this: J. Am. Chem. Soc. 1950, 72, 11, 4847–4854Publication Date (Print):November 1, 1950Publication History Published online1 May 2002Published inissue 1 November 1950https://pubs.acs.org/doi/10.1021/ja01167a001https://doi.org/10.1021/ja01167a001research-articleACS PublicationsRequest reuse permissionsArticle Views27290Altmetric-Citations2991LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Phase Diagrams and Aggregation Behavior of Poly(oxyethylene)-Poly(oxypropylene)-Poly(oxyethylene) Triblock Copolymers in Aqueous Solutions

1994-07-01

G. Wanka , H. Hoffmann , W. Ulbricht

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Diagrams and Aggregation Behavior of Poly(oxyethylene)-Poly(oxypropylene)-Poly(oxyethylene) Triblock Copolymers in Aqueous SolutionsG. Wanka, H. Hoffmann, and W. UlbrichtCite this: Macromolecules 1994, 27, 15, 4145–4159Publication Date (Print):July 1, … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Diagrams and Aggregation Behavior of Poly(oxyethylene)-Poly(oxypropylene)-Poly(oxyethylene) Triblock Copolymers in Aqueous SolutionsG. Wanka, H. Hoffmann, and W. UlbrichtCite this: Macromolecules 1994, 27, 15, 4145–4159Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 July 1994https://pubs.acs.org/doi/10.1021/ma00093a016https://doi.org/10.1021/ma00093a016research-articleACS PublicationsRequest reuse permissionsArticle Views8740Altmetric-Citations1312LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Higuchi equation: Derivation, applications, use and misuse

2011-04-15

Juergen Siepmann , Nicholas A. Peppas

Small-volume extrusion apparatus for preparation of large, unilamellar vesicles

1991-01-01

Robert C. MacDonald , Ruby I. MacDonald , Bert Ph. M. Menco +3 more

Phase equilibria in solutions of rod-like particles

1956-01-24

Paul J. Flory

A partition function for a system of rigid rod-like particles with partial orientation about an axis is derived through the use of a modified lattice model. In the limit of … A partition function for a system of rigid rod-like particles with partial orientation about an axis is derived through the use of a modified lattice model. In the limit of perfect orientation the partition function reduces to the ideal mixing law ; for complete disorientation it corresponds to the polymer mixing law for rigid chains. A general expression is given for the free energy of mixing as a function of the mole numbers, the axis ratio of the solute particles, and a disorientation parameter. This function passes through a minimum followed by a maximum with increase in the disorientation parameter, provided the latter exceeds a critical value which is 2e for the pure solute and which increases with dilution. Assigning this parameter the value which minimizes the free energy, the chemical potentials display discontinuities a t the concentration a t which the minimum first appears. Separation into an isotropic phase and a some what more concentrated anisotropic phase arises because of the discontinuity, in confirmation of the theories of Onsager and Isihara, which treat only the second virial coefficient. Phase separation thus arises as a consequence of particle asymmetry, unassisted by an energy term . Whereas for a large-particle asymmetry both phases in equilibrium are predicted to be fairly dilute when mixing is athermal, a comparatively small positive energy of interaction causes the concentration in the anisotropic phase to increase sharply, while the concentration in the isotropic phase becomes vanishingly small. The theory offers a statistical mechanical basis for interpreting precipitation of rod-like colloidal particles with the formation of fibrillar structures such as are prominent in the fibrous proteins. The asymmetry of tobacco mosaic virus particles (with or without inclusion of their electric double layers) is insufficient alone to explain the well-known phase separation which occurs from their dilute solutions at very low ionic strengths. Higher-order interaction between electric double layers appears to be a major factor in bringing about dilute phase separation for these and other asymmetric colloidal particles bearing large charges, as was pointed out previously by Oster.

Industrial Applications of Cyclodextrins

1998-06-25

Allan R. Hedges

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIndustrial Applications of CyclodextrinsAllan R. HedgesView Author Information Cerestar USA, Inc., 1100 Indianapolis Boulevard, Hammond, Indiana 46320 Cite this: Chem. Rev. 1998, 98, 5, 2035–2044Publication Date (Web):June … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIndustrial Applications of CyclodextrinsAllan R. HedgesView Author Information Cerestar USA, Inc., 1100 Indianapolis Boulevard, Hammond, Indiana 46320 Cite this: Chem. Rev. 1998, 98, 5, 2035–2044Publication Date (Web):June 25, 1998Publication History Received19 November 1997Revised27 May 1998Published online25 June 1998Published inissue 30 July 1998https://pubs.acs.org/doi/10.1021/cr970014whttps://doi.org/10.1021/cr970014wresearch-articleACS PublicationsCopyright © 1998 American Chemical SocietyRequest reuse permissionsArticle Views6798Altmetric-Citations874LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Complexation,Macrocyclic compounds,Oligosaccharides,Polymers,Solubility Get e-Alerts

Microemulsion-based media as novel drug delivery systems

2000-12-01

M. Jayne Lawrence , Gareth D. Rees

Poly(ethylene oxide)poly(propylene oxide)poly(ethylene oxide) block copolymer surfactants in aqueous solutions and at interfaces: thermodynamics, structure, dynamics, and modeling

1995-03-01

Paschalis Alexandridis , T. Alan Hatton

A review on experimental studies of surfactant adsorption at the hydrophilic solid–water interface

2004-08-01

Santanu Paria , Kartic C. Khilar

Micellization of mixed nonionic surface active agents

1975-01-01

John H. Clint

A theory is developed for micellization in systems of mixed nonionic surfactants. Assumptions of ideal mixing in the micellel and of a simple phase separation model enable the concentration of … A theory is developed for micellization in systems of mixed nonionic surfactants. Assumptions of ideal mixing in the micellel and of a simple phase separation model enable the concentration of each monomeric species and hence the micellar composition to be calculated as a function of total concentration (c). For mixtures of homologous surfactants the surface tension (γ) at the air-water interface is calculated by assuming the mixed monolayer to be in equilibrium with the monomers in solution. The γ against log c curve in such a system is predicted to have a minimum. Comparison with γ against log c curves obtained experimentally shows excellent agreement with theory over the whole concentration range both below and above the c.m.c.

Adsorption of chain molecules with a polar head a scaling description

1977-01-01

S. Alexander

The adsorption of chain molecules at an interface is investigated assuming that the molecule has both a polar head type of attraction localized on the chain and a uniform interaction … The adsorption of chain molecules at an interface is investigated assuming that the molecule has both a polar head type of attraction localized on the chain and a uniform interaction of the chain monomers with the surface. A scaling description of the chain configurations and interactions is used. It is shown that the presence of a uniform surface attraction changes the phase diagram drastically. Both a low density two-dimensional regime and a high density phase with the chains confined in narrow cylinders can occur. The transition between the two phases is first order. Power laws for the surface density, layer thickness and surface pressure are derived. The qualitative similarity with the behaviour observed for short chain lipids and surfactants is also noted and it is suggested that a uniform surface interaction may also play an important role there.

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Phase behaviour of polyoxyethylene surfactants with water. Mesophase structures and partial miscibility (cloud points)

1983-01-01

D. John Mitchell , G. J. T. Tiddy , Loraine Waring +2 more

From a review of the major factors responsible for surfactant mesophase structure, a model phase diagram is deduced which shows phase structure as a function of surfactant volume fraction and … From a review of the major factors responsible for surfactant mesophase structure, a model phase diagram is deduced which shows phase structure as a function of surfactant volume fraction and micelle curvature. To test this model the phase behaviour of a series of pure polyoxyethylene surfactants (CnEOm) with water has been studied using optical microscopy over the temperature range 0–100 °C. The compounds studied were C8EO3, C8EO4, C8EO8, C8EO12, C10EO3, C12EO3-C12EO6, C12EO8, C12EO12, C14EO3, C14EO6, C16EO3, C16EO4, C16EO6, C16EO8, C16EO12, C9PhEO8 and C12(2-C10)EO10. Phase diagrams were determined for C8EO4, C12EO3-C12EO6, C12EO8, C16EO4, C16EO8 and C16EO12. With the other compounds optical microscopy was used to determine the number, sequence and type of mesophases.

Surfactants and interfacial phenomena

1990-02-01

A. Silberberg

Statics and Dynamics of Wormlike Surfactant Micelles

1999-01-01

Wei Zhang

A review with 30 refs concerning wormlike surfactant micelles is given.Topics discussed include,micellar growth;crossover to semidilute regime.dynamical properties in the entangled state,no linear viscoelasticity and shear induced viscoelasticity. A review with 30 refs concerning wormlike surfactant micelles is given.Topics discussed include,micellar growth;crossover to semidilute regime.dynamical properties in the entangled state,no linear viscoelasticity and shear induced viscoelasticity.

Surfactants and Interfacial Phenomena

2012-01-25

Milton J. Rosen , Joy T. Kunjappu

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Supramolecular Polymers

2001-11-27

Luc Brunsveld , B.J.B. Folmer , E. W. Meijer +1 more

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSupramolecular PolymersL. Brunsveld, B. J. B. Folmer, E. W. Meijer, and R. P. SijbesmaView Author Information Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSupramolecular PolymersL. Brunsveld, B. J. B. Folmer, E. W. Meijer, and R. P. SijbesmaView Author Information Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands Cite this: Chem. Rev. 2001, 101, 12, 4071–4098Publication Date (Web):November 27, 2001Publication History Received23 April 2001Published online27 November 2001Published inissue 1 December 2001https://pubs.acs.org/doi/10.1021/cr990125qhttps://doi.org/10.1021/cr990125qresearch-articleACS PublicationsCopyright © 2001 American Chemical SocietyRequest reuse permissionsArticle Views33687Altmetric-Citations2740LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Liquid crystals,Liquids,Noncovalent interactions,Polymers,Supramolecular chemistry Get e-Alerts

Gemini Surfactants

2000-06-02

Fredric M. Menger , Jason S. Keiper

How easy it is to dismiss the humdrum surfactant! After all, its structure is unglamorous by present-day norms. And the surfactant has been entrenched in so many areas of commerce … How easy it is to dismiss the humdrum surfactant! After all, its structure is unglamorous by present-day norms. And the surfactant has been entrenched in so many areas of commerce for so many decades that its chemistry might seem old and tired. The purpose of this review is to persuade the reader otherwise, all the while focusing on a remarkable new surfactant, the gemini. Geminis, the common name for "bis-surfactants", can self-assemble at concentrations almost a hundredfold lower than for corresponding conventional surfactants. Surface activity can be improved a thousandfold. Geminis have already shown promise in skin care, antibacterial regimens, construction of high-porosity materials, analytical separations, and solubilization processes. Scores of patents dealing with geminis have appeared in the last few years. Indeed, geminis might well turn out, in the opinion of some, to be more useful to "l'homme de la rue" than crown ethers or fullerenes. This review delves into such topics as synthesis, critical micellization concentration, aggregate size and shape, gels, vesicles, and films. The information comes from scientists all over the world; one might say that gemini research is bathed in a continuous sunlight or summer. No prior knowledge of colloid chemistry is presupposed in this article.

Nano-emulsions

2005-08-31

Conxita Solans , P. Izquierdo , J. Nolla +2 more

Surfactants and Interfacial Phenomena

2004-07-02

Milton J. Rosen

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Polysarcosine-based surfactants: syntheses and properties

2025-06-25

Huimin Wang , K.S. Ling , Qiaodan Hu +5 more | Journal of Biomaterials Science Polymer Edition

As surfactants, amphiphilic molecules form micelles in aqueous solution to load hydrophobic medicines to increase their solubility and absorbability. TPGS, i.e. VE-PEG conjugate, is a commonly used effective surfactant suffering … As surfactants, amphiphilic molecules form micelles in aqueous solution to load hydrophobic medicines to increase their solubility and absorbability. TPGS, i.e. VE-PEG conjugate, is a commonly used effective surfactant suffering immune effects in human bodies with reduced biocompatibility and stealth property. Among the potential alternatives of PEG, polysarcosine (pSar) is the most promising one due to its outstanding property and effectiveness. Herein, we propose two strategies to polymerize Sar-NPC, direct initialization and post-polymerization chain end modification to conjugate hydrophobic building blocks onto pSar. Direct initial-ization applies amino-group-containing lipids 1,2-distearoyl-sn-glycero-3-phosphoethanolamine (DSPE) and 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE) as initiators to produce DSPE-pSar and DOPE-pSar, respectively. Post-polymerization chain end modification changes chain end amino group of pSar to carboxyl group for esterification with the hydroxyl groups on vitamin E (VE) and 1,2-dimyristoyl-sn-glycerol (DMG) to produce VE-pSar and DMG-pSar. The degrees of polymerization of pSar blocks are designed to be 14, 25 and 28 precisely, and the CMC values of the amphiphilic products are between 0.28 and 5.63 µg/mL. VE-pSar samples have extremely strong ability to increase the solubility of paclitaxel (PTX), 30 times more than TPGS. It also exhibits high cytocompatibility and low hemolysis rate below 5%, much less than TPGS. The two preparations of pSar-containing surfactants are efficient and versatile, and the products have high probability to become a new generation of clinical hydrophobic medicine solubilizer.

Droplets, Micelles, and More Complex Structures of Polyampholyte Aggregates

2025-06-24

Seowon Kim , Nam-Kyung Lee , A. Johner +1 more | Macromolecules

Antibacterial activity and interfacial adsorption properties of quaternary-ammonium-salt-based gemini and trimeric surfactants

2025-06-24

Risa Kawai , Aya Furuichi , Shiho Yada +2 more | Colloids and Interface Science Communications

Study on the Strong Association and Synergistic Temperature and Salt Resistance Mechanism of Differential Charge Surfactants and Ionic Polymer Systems

2025-06-20

Chengwei Zuo , Pingli Liu , Pengfei Chen +3 more | Polymer Engineering and Science

ABSTRACT The amphiphilic hydrophobic associative polyacrylamide (HAPAM) was synthesized via free radical copolymerization using hexadecyl allyl dimethyl ammonium chloride (C16DMAAC), acrylic acid (AA), acrylamide (AM), and 2‐acrylamido‐2‐methylpropanesulfonic acid (AMPS) as … ABSTRACT The amphiphilic hydrophobic associative polyacrylamide (HAPAM) was synthesized via free radical copolymerization using hexadecyl allyl dimethyl ammonium chloride (C16DMAAC), acrylic acid (AA), acrylamide (AM), and 2‐acrylamido‐2‐methylpropanesulfonic acid (AMPS) as raw materials. Additionally, the oil amide sulfobetaine (OSB) amphoteric surfactant was synthesized from oil amide dimethyl tertiary amine, sodium sulfite (NaHSO 3 ), and epichlorohydrin. The impact of various charged surfactants (SDS, DTAB, OSB, and AEO) on the binding properties of HAPAM in NaCl solution was investigated through measurements of apparen t viscosity, dynamic light scattering, cryogenic scanning electron microscopy, and rheological analysis. The results indicated that the viscosity of HAPAM in NaCl solution exhibited a parabolic relationship, first rising and then falling, with increasing concentrations of SDS and OSB. Upon the addition of OSB, the temperature and shear resistance of the polymer system were significantly enhanced. Compared to the system before surfactant addition, the maximum viscosity increased by approximately 10 mPa (70%) after shearing at 120°C. At different concentrations of OSB and SDS, the viscosity increased by 133%–157%, the hydration radius of HAPAM expanded by 2.28 to 6.22 times, and the absolute value of the zeta potential increased by 27.66 mV. Microscopic morphological observations revealed that the polymer system formed a three‐dimensional network structure of intermolecular association with the addition of surfactants, ultimately creating a dense spatial structure. However, this phenomenon was not as pronounced for cationic and nonionic surfactants. These findings, corroborated by molecular dynamics simulations, confirmed that an appropriate amount of anionic surfactants can enhance hydrophobic binding, expand electrostatic repulsion between anions, and significantly improve the resistance and electrostatic shielding effect of HAPAM against salt solution compression bilayer. This study provides valuable insights into the effects of surfactants on the cross‐linking structure and binding properties of HAPAM in NaCl solution, offering guidance for improving the recovery rate in binary composite flooding applications.

Connecting bulk rheology, structural transitions and heterogeneous flow in Pluronic F127 micellar cubic liquid crystals using rheo-microscopy

2025-06-20

Rishav Agrawal , Patrick T. Spicer , Esther Garcı́a-Tuñón | Journal of Colloid and Interface Science

Understanding "yielding" of gels and other soft materials is critical for successful performance in many industries and research fields. However, it is known that not all yielding is the same, … Understanding "yielding" of gels and other soft materials is critical for successful performance in many industries and research fields. However, it is known that not all yielding is the same, and that local structures and microscopic dynamics can be highly heterogeneous. Combining bulk measurements and direct visualization should enable us to map local flows and structural heterogeneities, and to connect their evolution with bulk rheological properties. We study the underlying microscopic dynamic behaviours of an F127 micellar cubic phase gel using rheo-optics. Bulk rheology experiments under large and small deformations are performed with fluorescence and polarized microscopy at the edge of the gap. Large amplitude oscillatory shear results are analyzed using Fourier-Transform rheology and the Sequence of Physical Processes. The structure-rheology analyses enable the correlation of the onset of nonlinearities with banding instabilities and the flow transition with the "slip-stick" theory previously proposed for cubic phases. Under large deformations, fracture is not consistent with the expected idealized yield behaviour. Birefringence analyses enable mapping the structural heterogeneity and the kinetics of structural transitions during the crystallization of the cubic structure. Combination of the flow and birefringence results reveals a connection between structural heterogeneity, transition kinetics, and fracture under large deformations.

Investigating the interplay of Catanionic surfactant and co-surfactants with wo on the structural parameters of Hexylammonium Hexanoate-based water-in-oil microemulsions using SAXS

2025-06-19

Ruchi Verma , Aditi Vijay , Jasveer Kaur +1 more | Journal of Molecular Liquids

Surface and Antimicrobial Properties of Ester-Based Gemini Surfactants

2025-06-19

Iwona Kowalczyk , Adrianna Szulc , Anna Koziróg +2 more | Molecules

Cationic surfactants, accounting for approximately 7% of the global surfactant market, are widely used in applications such as fabric softeners, biocides, and corrosion inhibitors. Recently, gemini surfactants-comprising two amphiphilic units … Cationic surfactants, accounting for approximately 7% of the global surfactant market, are widely used in applications such as fabric softeners, biocides, and corrosion inhibitors. Recently, gemini surfactants-comprising two amphiphilic units linked by a spacer-have attracted significant interest due to their superior surface activity, lower critical micelle concentrations, and strong antimicrobial properties. However, their poor biodegradability, resulting from their complex molecular structure, has raised environmental concerns. To address this, researchers have developed ester-based gemini surfactants incorporating biodegradable bonds. This study aimed to investigate the relationship between the structure of ester-based gemini surfactants (hydrophobic chain length and spacer type) and their antimicrobial activity against bacteria and fungi. Three series of compounds featuring different functional groups in the spacer were synthesized, along with a trimeric surfactant for comparative purposes. The results demonstrated that both the hydrophobic chain length and the presence of additional cationic groups significantly influence the CMC and antimicrobial performance. Quantum mechanical calculations were also performed to search for correlations between electronic properties and chemical reactivity of compounds. These findings highlight that ester-based gemini surfactants combine high surface and antimicrobial activity with the potential for improved biodegradability, making them promising candidates for use in environmentally friendly applications.

Study on the effect of surfactant on the liquid diffusion process based on the liquid-core cylindrical lenses

2025-06-19

Qing Yue , Menghan Zou , Zhiwei Li +1 more | Experimental Thermal and Fluid Science

Self-consistent Field Analysis of Segregative Aqueous Dextran–Polyethylene Glycol Solutions: (1) Bulk Phase Diagrams

2025-06-19

F. A. M. Leermakers , Leonardo Ruiz-Martínez , Simeon D. Stoyanov +1 more | The Journal of Physical Chemistry B

Quasi-ternary dextran-water-polyethylene glycol (D-W-PEG) systems can undergo a segregative phase transition from a homogeneous to two-phase state with one phase enriched in dextran, the other in PEG, and both phases … Quasi-ternary dextran-water-polyethylene glycol (D-W-PEG) systems can undergo a segregative phase transition from a homogeneous to two-phase state with one phase enriched in dextran, the other in PEG, and both phases typically dominated by the spectator-like water component. The relation between the driving forces and the resulting phase behavior for such aqueous two-phase systems (ATPSs) is systematically studied with a Scheutjens-Fleer self-consistent field (SF-SCF) theory. We consider both the repulsive interactions between the polymeric species (the major driving force) and the solvent quality disparity (the minor driving force). In a narrow parameter range, when the major driving force is very weak, a closed-loop two-phase region with two critical points may be found. However, in more realistic parameter settings, an ATPS has an'open' binodal with a single critical point. We report on the volume ratio, the composition of the phases, (structural) parameters of the interface, such as the width, and the interfacial tension, as a function of the (average) water fraction in the system. We show that the volume-management strategy influences the phase diagram when polymers are polydisperse. By fitting a set of experimental phase diagrams, SF-SCF model parameters for D-W-PEG systems are established, which will be used in future to underpin experiments for these systems.

Molecular Dynamics Insights into Spacer Chain Length Effect on Foam Stability of Mixed Amine Gemini Surfactant/Octanol Systems

2025-06-18

Yang Bai , Mengxu Xu , Gaoquan Liu +3 more | Colloids and Surfaces A Physicochemical and Engineering Aspects

Kinetics and mechanistic modeling of chlorhexidine uptake from aqueous solution using nitrogen-doped achatinidae chitin as adsorbent

2025-06-17

Marcel I. Ejimofor , Matthew C. Menkiti | Next Materials

Compression Isotherms of Monomolecular Films of 7β-alkyl Cholic Acid Derivatives on an Acidic Aqueous Substrate and Their Interactions with Lecithin Reveal the Conformations of the Alkyl Chain and Steroid Skeleton

2025-06-16

Dileep Kumar , Mihalj Poša | International Journal of Molecular Sciences

This study analyzed the compression isotherms of 7β-alkyl cholic acid derivatives and compared them to those of cholic and deoxycholic acids to elucidate their orientation and molecular interactions (acidic aqueous … This study analyzed the compression isotherms of 7β-alkyl cholic acid derivatives and compared them to those of cholic and deoxycholic acids to elucidate their orientation and molecular interactions (acidic aqueous substrate-pH 2; NaCl concentration-3 M; temperature-T = 298.15 K). It was found that the compression isotherm of the 7β-octyl derivative of cholic acid in the monomolecular layer is most similar to the compression isotherm of deoxycholic acid. In 7β-alkyl derivatives of cholic acid, the hydrophobic interaction energy in their aggregates from a monomolecular film increased with the length of the alkyl chain. However, this energy did not increase linearly with C atoms, suggesting the existence of a conformational equilibrium. In binary mixtures of the tested bile acids and lecithin, only the 7β-octyl derivatives of cholic acid and deoxycholic acid had orientations in which the steroid skeleton had a "vertical" position, i.e., only the C3 OH group was immersed in the aqueous substrate, which resulted in the maximum hydrophobic interaction with lecithin. In 7β-octyl derivatives, part of the octyl chain probably also participated in the interaction with lecithin. In 7β-propyl and 7β-butyl derivatives, C7 alkyl groups sterically shielded the C7 α-axial OH group. However, in the 7β-ethyl derivative the C7 OH group was not additionally sterically shielded, so this derivative, similarly to cholic acid, partially dissolved in the aqueous substrate after the collapse point.

Monte Carlo optimization method based QSPR modeling of micelle–water partition coefficient

2025-06-16

Jelena Živković , Goran M. Nikolić , Žarko Mitić +1 more | Fluid Phase Equilibria

Ionic Liquid Cationic Surfactants With a Decyl Hydrophobic Chain: Effects of Head Group and Counterion

2025-06-16

Ravan A. Rahimov , Shafiga M. Nasibova , Inara V. Amirova +3 more | Journal of Surfactants and Detergents

ABSTRACT Quaternary ammonium‐type surfactants were synthesized by N‐alkylation reaction of ethanolamines with 1‐iododecane. These resulting cationic surfactants were subsequently converted into ionic liquid‐type cationic surfactants by replacing the iodide counterion … ABSTRACT Quaternary ammonium‐type surfactants were synthesized by N‐alkylation reaction of ethanolamines with 1‐iododecane. These resulting cationic surfactants were subsequently converted into ionic liquid‐type cationic surfactants by replacing the iodide counterion with an acetate ion. The surface activities of those surfactants were determined using the droplet‐breaking method, while their specific electrical conductivities were measured by the conductometric method. Based on these measurements, the surface activity parameters of both surfactant classes were calculated and compared. The biocidal properties of the ionic liquid cationic surfactants against various bacteria and fungi were assessed using the disk diffusion method. Additionally, the petroleum‐collecting and petroleum‐dispersing abilities of the ionic liquid surfactants, containing acetate counterions, were evaluated by analyzing their efficiency in collecting a thin petroleum layer on the water surface.

Counterion-Mediated Assembly of Fluorocarbon–Hydrocarbon Surfactant Mixtures at the Air–Liquid Interface: A Molecular Dynamics Study

2025-06-14

Xiaolong Quan , Tong Tong , Tao Li +7 more | Molecules

This study employs molecular dynamics simulations to investigate counterion effects (Li+, Na+, K+) on the interfacial aggregation of mixed short-chain fluorocarbon, Perfluorohexanoic acid (PFHXA), and Sodium dodecyl sulfate (SDS) surfactants. … This study employs molecular dynamics simulations to investigate counterion effects (Li+, Na+, K+) on the interfacial aggregation of mixed short-chain fluorocarbon, Perfluorohexanoic acid (PFHXA), and Sodium dodecyl sulfate (SDS) surfactants. Motivated by the need for greener surfactant alternatives and a fundamental understanding of molecular interactions governing their behavior, we demonstrate that counterion hydration radius critically modulates system organization. K+ ions induce superior monolayer condensation and interfacial performance compared to Li+ and Na+ counterparts, as evidenced by threefold analysis: (1) RMSD/MSD-confirmed equilibrium attainment ensures data reliability; (2) 1D/2D density profiles and surface tension measurements reveal K+-enhanced packing density (lower solvent-accessible surface area versus Na+ and Li+ systems); (3) Electrostatic potential analysis identifies synergistic complementarity between SDS’s hydrophobic stabilization via dodecyl chain interactions and PFHXA’s charge uniformity, optimizing molecular-level charge screening. Radial distribution function analysis demonstrates K+’s stronger affinity for SDS head groups, with preferential sulfate coordination reducing surfactant-water hydration interactions. This behavior correlates with hydrogen-bond population reduction, attributed to SDS groups functioning as multidentate ligands—their tetrahedral oxygen arrangement facilitates cooperative hydrogen-bond networks, while counterion-specific charge screening competitively modulates bond formation. The resultant interfacial restructuring enables ordered molecular arrangements with lower system curvature than those observed in Li+ and Na+-containing systems. These findings elucidate counterion-mediated interfacial modulation mechanisms and establish K+ as an optimal candidate for enhancing PFHXA/SDS mixture performance through hydration-radius screening. The work provides molecular-level guidelines for designing eco-friendly surfactant systems with tailored interfacial properties.

Dual-Responsive Microemulsion Based on Hydrophobic Deep Eutectic Solvents for Tuning Highly Efficient Knoevenagel Reaction

2025-06-13

Y.-J. Huang , Yanbo Zhao , Dazhen Xiong +7 more | Langmuir

The Knoevenagel reaction, crucial for synthesizing α, β-unsaturated compounds, faces challenges like harsh conditions and separation difficulties. In this study, a novel class of temperature and CO2 stimuli-responsive deep eutectic … The Knoevenagel reaction, crucial for synthesizing α, β-unsaturated compounds, faces challenges like harsh conditions and separation difficulties. In this study, a novel class of temperature and CO2 stimuli-responsive deep eutectic solvent (DES)-based microemulsions was designed, composed of DES, Triton X-100, and H2O. The variations in microstructure and particle size distribution of these microemulsions, triggered by CO2/N2 or temperature changes as environmentally friendly stimuli, were investigated through electrical conductivity, dynamic light scattering (DLS), and small-angle X-ray scattering (SAXS). The results indicate that these microemulsions could be reversibly switched from a W/O single phase to a state of complete oil-water separation by an alternating process of bubbling and removal of CO2 or changing the temperature. In addition, UV-vis spectroscopy, Fourier transform infrared spectrometry (FTIR), and nuclear magnetic resonance (NMR) were utilized to understand the reversible phase separation of DES-based microemulsions driven by both temperature and CO2. The outcomes indicate that the reversible phase separation mechanism results from variations in the oil-water interface of the microemulsion caused by the insertion of hydrophobic CO2 molecules into the surfactant interface or the changes in the force between the Triton X-100 and DES or H2O, respectively. This dual-responsive DES-based microemulsion was applied in Knoevenagel reactions, achieving the efficient reuse of microemulsions, separation of products, and integration of reactions.

Effects of Encapsulating Process Parameters of Magnetic Chitosan into Alginate Beads for Removal of Aspirin

2025-06-13

| Malaysian Journal of Chemistry

Spatiotemporally-controlled droplet merging reveals 2D diffusion dynamics of multi-component surfactants

2025-06-12

Hyunwoo Jang , Dae-Woong Jeong , Byung‐Chang Oh +7 more | Journal of Colloid and Interface Science

Self‐Assembly of Hydration‐Dependent Quasi‐Spherical Mixed Micelles into Selective Mesoscale Complex Crystalline Structures

2025-06-04

Young‐Jin Yoon , Tae‐Hwan Kim | Aggregate

ABSTRACT Over the past three decades, a variety of complex structures mimicking intermetallic compounds have been discovered in soft matter systems. However, a complete understanding of the mechanisms that govern … ABSTRACT Over the past three decades, a variety of complex structures mimicking intermetallic compounds have been discovered in soft matter systems. However, a complete understanding of the mechanisms that govern the self‐assembly of these complex structures in aqueous solution is still lacking. Herein, we investigate the formation of mesoscale complex crystal structures with micelle packing of nonionic amphiphilic molecules in aqueous solutions using small‐angle X‐ray scattering (SAXS). The SAXS measurements revealed both unary‐micelle and binary‐micelles liquid crystalline phases, including face‐centered cubic (FCC), body‐centered cubic (BCC), Frank‐Kasper (FK) σ, and FK A15 and NaZn 13 , FK C14, and FK C15 phases, respectively, which arise from the interplay of composition, temperature, and time. Quantitative SAXS analyses with Le Bail refinements and electron density reconstruction indicated that EO hydration, the interfacial curvature of micelles, and micellar packing play important roles in the formation of mesoscale complex crystalline structures during the self‐assembly process of the nonionic ternary system. This study is the first demonstration of binary mesoscale complex crystalline structures with quasispherical close packing in nonionic amphiphilic aqueous solution, offering broader insights for the self‐assembly mechanism of the complex crystalline structures on soft materials.

Hydrophobic Eutectogels for the Removal of Contaminants of Emerging Concern from Water

2025-06-03

Elena Gabirondo , João Miguel Mendes De Araújo , Ana B. Pereiro +1 more | ChemSusChem

Abstract Five hydrophobic eutectic solvents based on menthol and thymol were prepared and incorporated into a poly(ethylene glycol) diacrylate (PEGDA) network to form eutectogel membranes. The two most promising eutectogels … Abstract Five hydrophobic eutectic solvents based on menthol and thymol were prepared and incorporated into a poly(ethylene glycol) diacrylate (PEGDA) network to form eutectogel membranes. The two most promising eutectogels were further optimized by adding ethyl hexylacrylate (HA) to the eutectogel formulation to improve the compatibility between the eutectic solvent and polymer network and to enhance the water resistance of the resulting membranes. Thermal analysis confirmed the successful formation and integration of eutectic solvents within the polymer network. Rheological studies demonstrated the rubber‐like behavior of the prepared hydrophobic eutectogels, with menthol‐based variants exhibiting superior mechanical properties. Finally, sorption experiments were conducted using the optimized octanoic acid:menthol PEGDA‐HA eutectogel to evaluate its efficiency in removing various contaminants of emerging concern (CECs), including diclofenac, iopromide, cefazolin, bisphenol A, and dichlorophenol. The results revealed high sorption capacities for bisphenol A (3213 mg⋅kg −1 ) and dichlorophenol (2981 mg⋅kg −1 ), followed by diclofenac (1490 mg⋅kg −1 ), whereas minimal sorption capacities were observed for iopromide and cefazolin. Overall, this study demonstrates the potential of hydrophobic eutectogels as efficient and tunable materials for water purification, paving the way for their application in the environmental remediation of different emerging pollutants related to global change and human activities.

Ergosterol at oil–water interface: W/O emulsion stability and interfacial behavior

2025-06-01

Kai Lin , Yaxin Wang , Pengya Du +7 more | LWT

Mixed micellar solutions of an oleo-furan sulfonate surfactant with anionic and non-ionic surfactants

2025-06-01

Laura Deeming , Niamh R. Leaman , Dirk Honecker +3 more | Journal of Colloid and Interface Science

Investigating the Potential Use of Glycolipid Surfactants Extracted from Microbes as Anti-Aging Compounds in Cosmetic Formulations

2025-06-01

Amir Mohammad Bagheri , Mohammad Amin Raeisi Estabragh , Mandana Ohadi | Journal of Shahid Sadoughi University of Medical Sciences

Introduction: Skin aging is a complex process of genetic and environmental factors, such as chemical pollution and ultraviolet radiation. There is increasing evidence that microbial surfactants can exert significant antiaging … Introduction: Skin aging is a complex process of genetic and environmental factors, such as chemical pollution and ultraviolet radiation. There is increasing evidence that microbial surfactants can exert significant antiaging effects on the skin through various mechanisms, such as stimulating fibroblast growth, possessing high antioxidant capacity, and exhibiting desirable anti-inflammatory properties. Additionally, their biodegradable nature, high surface activity, good compatibility with the body's environment and stability against changes in temperature and pH have led to an increased interest among researchers in using these compounds for bio-medical and cosmetic-sanitary applications. The aim of this study was to investigate the potential effects of glycolipid surfactants of microbial origin as anti-aging ingredients in cosmetic-hygiene products. Conclusion: This study examined the potential applications of key glycolipid surfactants (rhamnolipids and sophorolipids) derived from microbial sources to combat skin aging. Consequently, due to features such as high antioxidant capacity, anti-inflammatory properties, stimulation of collagen biosynthesis, modulation of the metabolism of fibroblasts, and more, these substances may serve as effective compounds to combat the aging process in cosmetic-hygiene products

Surface activities and micellization of an anionic surfactant in the presence of a commercial insulin formulation

2025-06-01

Muhammad Ishfaq , Shanza Mujeeb , Asad Muhammad Khan | Journal of Molecular Liquids

Isomeric olefin sulfonate surfactants with varied branched hydrocarbon architectures: Effect of the chain branching degree

2025-06-01

Hongwei Bai , Zimeng Wei , Zexiang Bi +4 more | Chemical Engineering Science

Preparation, characterization and host-guest interaction of photothermal-responsive modified carboxymethyl chitosan microcapsules

2025-06-01

Longfei Wang , Jingyi Hu , Meng Zhou +7 more | Carbohydrate Polymers

Analysis of Mixed Micellization of Promethazine Hydrochloride and 1‐Hexadecyl‐3‐Methylimidazolium Chloride Using Different Techniques: Influence of Additives

2025-06-01

Dileep Kumar , Javed Masood Khan , Mihalj Poša | ChemistrySelect

Abstract Using tensiometric technique in various solvents, the interaction of phenothiazine drug promethazine hydrochloride (PMH) and ionic liquid 1‐hexadecyl‐3‐methylimidazolium chloride (HICL‐16) mixture at 298.15 K was examined. Here, both the … Abstract Using tensiometric technique in various solvents, the interaction of phenothiazine drug promethazine hydrochloride (PMH) and ionic liquid 1‐hexadecyl‐3‐methylimidazolium chloride (HICL‐16) mixture at 298.15 K was examined. Here, both the employed components (PMH and HICL‐16) are cationic in nature. Since mixed amphiphile systems are widely applied and economically viable, considerable research has been devoted to investigating their physicochemical properties. Interaction amongst PMH and HICL‐16 in aqueous has also been explored using UV–visible method. Tensiometric method was used to assess the critical micelle concentration ( cmc ) of pure (PMH and HICL‐16) as well as mixtures, and the results (deviation from their ideal cmc ( cmc id ) value) revealed that mixtures cmc showed non‐ideal behavior. Compared to an aqueous solution, the cmc of system (pure/mixture) decreased in the occurrence of employed concentration of fructose and glucose whereas it increased in urea solvent, and glucose is more efficient in diminishing cmc than fructose. Evaluated interaction parameter (β m ) value of mixed micelles showed that PMH and HICL‐16 have an attractive interaction or synergy. Attained negative Gibbs free energy () was accomplished owing to the spontaneity nature of micelles formation. A UV–visible study exposed an interaction between PMH and HICL‐16, as PMH absorbance increased with HICL‐16 concentration.

Exploring the Physical Short-Term Stability of Naproxen Suspensions: The Impact of Stabilizer and Stabilizer Concentration on the Particle Size Profiles

2025-06-01

Nadina Zulbeari , Basel Atieh Dasous , René Holm | Journal of Drug Delivery Science and Technology

Interfacial Molarity Shifts in Acyl Taurine Pseudogemini Surfactants: Probing Aggregation Transitions via Chemical Trapping

2025-06-01

Xiaoting Xu , Yujia Sun , Runan Yan +4 more | Colloids and Surfaces A Physicochemical and Engineering Aspects