Critical behavior and ensuing phase separations in paraben. Effects of urea on the microstructure and phase behavior. Surfactants and polymers in aqueous solution wiley online books. Jan 21, 2020 laughlin, the aqueous phase behavior of surfactants, academic press, london 1994 israelachvili, intermolecular and surface forces, academic press, london 1985 friberg ed, liquid crystals and the structure of biomembranes, adv. Phase behavior of the apgddacwater ternary system has also been carried out by polarized optical microscope. Interfacial tension reduction between oleic and aqueous phase is crucial. The micellization and phase behavior of the binary mixed systems comprising the anionic surfactants sodium bis2ethylhexyl sulfosuccinate aotsodium alkyl phenol ether sulfate apes and nonionic polyoxyethylene alkyl ether surfactants c10e8c10e10ce10 have been investigated by surface tension, fluorescence spectroscopy, and cloud point measurements. Phase behavior of aqueous twophase systems of cationic. Phase behavior of polyoxyethylene trisiloxane surfactant.
A model is developed which can predict the phase boundaries for the mixed surfactant system from the pure anionic. The effect of the insertion of an isosorbide moiety has been evaluated through the study of the aqueous phase behaviors of the compounds and particularly the formation of lyotropic liquid crystal phases. For any total surfactant concentration, the salinity tolerance is shown to increase as the percentage of nonionic surfactant in the system is increased. The aqueous phase behavior of polyionsurfactant ion.
Pdf phase behavior studies for formulation of surfactant mixtures. Owing to such a versatile phase behaviour and diversity in colloidal. Often overlooked in these experiments is the effect of urea on the phase behavior and micellar microstructure. The phase states in which surfactants may exist constitute an important dimension of their physical science. He has published over 80 papers in the field and is a coauthor of the book surfactants and polymers in aqueous solution. Phase behavior of surfaceactive solutes lls health cdmo. Dynamic light scattering and viscosity studies on the. Schneider, 1 mariagabriella santonicola, 2 abraham m. It has been summarized that there exists commonly three concentration regions for the aqueous mixtures of cationicanionic surfactants. The aqueous phase behavior of surfactants robert g. The contact angles are determined on an oil wet quartz surface to investigate the wettability alteration in the presence of tween surfactants with varying salinity. Phase behavior of cationicanionic surfactant mixtures of the same chain length n10, 12 or 14 strongly depends on the molar ratio and actual concentration of the surfactants. Mixed micelles of trisiloxane based silicone and hydrocarbon surfactants systems in aqueous media.
Pdf a laboratory study of phase behavior evaluation of anionic anionic. Phase behavior and solution properties of aqueous polyionsurfactant ion systems janiak, john lu. Pdf phase behavior in mixture of cationic and anionic. The stability of the protein under these conditions is then monitored by biophysical methods such as fluorescence or circular dichroism spectroscopy. Surface chemistry of surfactants and polymers wiley. When the surfactant concentration in aqueous solution exceeds 10% by weight. The aqueous phase behavior of polyionsurfactant ion complex salts mixed with nonionic surfactants john janiak, a lennart piculell, a gerd olofsson a and karin schillen a. Effects of hardness and cosurfactant on phase behavior of alcoholfree alkyl propoxylated sulfate systems maura c.
The aqueous phase behavior of surfactants semantic scholar. For the same reason the viscosity of the aqueous phase cannot be increased. The rising and dissolution behaviors of single microbubbles generated in an acrylic cell were observed by a highspeed imaging technique. They do not ionize in aqueous solution, because their hydrophilic group is of a nondissociable type, such as alcohol, phenol, ether, ester, or amide.
Jun 20, 2012 read aqueous phase behavior of isosorbidebased nonionic surfactants, colloids and surfaces a. Mar 29, 2005 added surfactant can change the phase behavior of aqueous polymerparticle mixtures. Phase behavior of cationic anionic surfactant mixtures of the same chain length n10, 12 or 14 strongly depends on the molar ratio and actual concentration of the surfactants. Oklahoma the salinity tolerance precipitation phase boundary is. Phase behavior of pseudoternary brinealkanealcohol. Thermodynamics of micellization, interfacial behavior and. The aim of this work was to study intermolecular interactions in systems containing charged polyion polyacrylate, pa. Effects of urea on the microstructure and phase behavior of. Us epa, oswer, office of resource conservation and recovery subject. Study and evaluation of surfactants for aqueous dispersions. An aqueous phase behavior was investigated for ionic liquidrelated cationic gemini surfactant, c12im4c12imbr2, in which two dodecylimidazolium parts are linked by a spacer composed of four methylene units. A chapter on novel surfactants has been included in.
Dilute aqueous solution phase diagrams, surface tension isotherms, dilute solution viscosities, critical micelle concentrations and application of regular solution theory. Investigation on the phase behaviors of aqueous surfactant. Our previous work17 as well as other reports18 has suggested that in ionic liquids the electrostatic interactions between singlecomponent charged surfactants are. These systems consist of extended aggregation of surfactant molecules into large organised structures. Phase behavior and solution properties of aqueous polyion. The book also details the physicochemical properties and microstructure of aqueous micellar. Surfactants and polymers in aqueous solution, 2nd edition. The aqueous phase behavior of surfactants colloid science robert g. Phase behavior of surfactant an overview sciencedirect. Mass transfer from freely rising microbubbles in aqueous. Scamehorn school of chemical engineering and materials science, university of oklahoma, norman. Oct 15, 2002 he has published over 80 papers in the field and is a coauthor of the book surfactants and polymers in aqueous solution.
Phase behavior of aqueous twophase systems of cationic and. The phase behavior of concentrated surfactant solutions is complex and is strongly influenced by the molecular. The phase sequence, for example, with the composition can be expected from the change in the interfacial curvature. Interfacial tension and phase behavior of surfactantbrineoil system. Features a 250sheet paper tray adjustable for letter or legal size paper. Aggregation behavior of antipsychotic drug under the.
Theoretical model and phase behavior for binary surfactant. To achieve this we have created four different phase diagrams using two different socalled complex salts, c16tapa25 a scattering methods applied to soft matter. The phase diagram for c 12 mdbsds aqueous solutions was mapped, indicating that the astp forms. The aqueous phase behavior of polyionsurfactant ion complex.
Surfactants and polymers in aqueous solution is broad in scope, providing both theoretical insights and practical help for those active in the area. The aqueous phase behavior of surfactants, academic press inc, london 1994, p. The characteristic features of surfactant phase behaviour. A presentation at epa region 3 corrective action workshop on the pros and cons of lnapl, napl and dnapl strategies in ca management. Professor kronberg supervises research in the fields of microemulsions, adsorption of surfactants and polymers, fuel formulations, and polymeric networks. Phase behavior in mixture of cationic and anionic surfactants. Titration microcalorimetry has been applied to study the micellization and adsorption of the following zwitterionic surfactants. Pdf glass transition behavior of aqueous solution of. This book contains a thorough discussion of surfactant types and gives information of main routes of preparation. Surfactants are compounds that lower the surface tension or interfacial tension between two liquids, between a gas and a liquid, or between a liquid and a solid.
The aqueous mixtures of an anionic surfactant sodium dodecyl benzene sulfonate, sdbs and an ionic liquid 1butyl3methylimidazolium tetrafluoroborate, bmimbf 4 within a certain range of compositions can spontaneously separate into two immiscible aqueous phases atps. Surfactants and polymers in aqueous solution wiley. It contains several thousand phase behavior experiments using 34 unique crude oils, 294 unique surfactants, and 70 unique cosolvents. Spontaneous vesicle formation and phase behavior in mixtures.
Pdf glass transition behavior of aqueous solution of sugar. Gemini surfactants considers the synthesis, phase behavior, and rheology of gemini and related surfactants and clarifies the adsorption and surface tension behavior of gemini surfactants at airwater, oilwater, and solidwater interfaces. Controlling the phase behavior of polyionsurfactant ion. Jun 20, 2012 highlights synthesis of three new nonionic surfactants derived from isosorbide iso. Aqueous phase behavior of isosorbidebased nonionic surfactants article in colloids and surfaces a physicochemical and engineering aspects 404. Physicochemical and engineering aspects on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. September 3, 199 a new model for micellization behaior of binary surfactant mixtures in solution is presented. The aqueous phase behavior of surfactants colloid science kindle edition by laughlin, robert g download it once and read it on your kindle device, pc, phones or tablets. Mass transfer from freely rising single microbubbles in ultrapure and aqueous solutions of surfactants sds and pluronic f68 or salt nacl was investigated. To study the phase behavior and formation mechanism of an aqueous surfactant twophase system astp, which was composed of a cationic surfactant ndodecylnmethylpiperidinium bromide c 12 mdb and an anionic surfactant sodium dodecyl sulfate sds, an investigation was conducted. Somasundaran langmuir center for colloids and interfaces, columbia university, lvew york, new york 10027 received may 5, 1997. Charge screening between anionic and cationic surfactants.
Abstract polyelectrolytes and oppositely charged surfactants interact through attractive electrostatic forces, which in many cases lead to phase separation already at low total concentrations. The phase diagram is characterized by a micellar phase, a region where lamellar and micellar phases coexist and a lamellar phase. Differential scanning calorimetry was used to detect phase boundaries among various phases, from which a temperature. Microemulsions based on anionic gemini surfactant pdf free.
The utceor database was constructed and used to develop the models. Nonionic surfactants come as a close second with about 45% of the overall industrial production. Use features like bookmarks, note taking and highlighting while reading the aqueous phase behavior of surfactants colloid science. Understanding the behavior of light nonaqueous phase liquids lnapls in the subsurface us epa archive document author. Aqueous phase behavior of tetraethylene glycol decanoyl. The results also suggest that the use of parabens as preservatives in some ionic surfactantbased formulations can also help in tuning their rheological characteristics. Nmr techniques, either pgsenmr or 2h nmr, were confirmed as useful tools to characterize aqueous phase behavior of surfactants, providing supplementary information to the classical techniques such as visual observations, polarized optical microscopy pom, and surface tension measurements. Amphoteric surfactants are known for their tolerance to salinity. Precipitation of catanionic surfactant and mixed micelles formation are observed over.
An aqueous phase behavior was investigated for ionic liquidrelated cationic gemini surfactant, c 12 im4c 12 imbr 2, in which two dodecylimidazolium parts are linked by a spacer composed of four methylene units. Surfactant precipitation in aqueous solutions containing mixtures of anionic and nonionic surfactants kevin l. Theoretical model and phase behavior for binary surfactant mixtures i lei huang and p. Added surfactant can change the phase behavior of aqueous polymerparticle mixtures. Kaler, center for molecular engineering and thermodynamics, department of chemical engineering.
Phase behavior in mixtures of cationic and anionic. Isododecyl ethers ethoxylated c 12 isoe 3 or glycerylated c 12 isogly, c 12 isoglyiso. Microemulsions based on anionic gemini surfactant pdf. Request pdf interfacial tension and phase behavior of surfactantbrineoil system. Phase behavior and interfacial tension properties of an amphoteric. The effect of salt kbr additions on the behavior of the dimeric surfactant 12212 ethanediyl1,2bisdodecyldimethylammonium bromide has been investigated using small angle neutron scattering sans and dynamic light scattering dls. Request pdf aggregation behavior of antipsychotic drug under the influence of bile salt in aqueous urea solution the selfassembly of pharmaceutical amphiphiles is an important area of. May 02, 2003 effect of toctylphenoxylpolyethoxyethanol tx100 on the dilute aqueous solution phase diagrams, surface activity and micellization behavior of nonionic silicone surfactants ss in aqueous media.
Spontaneous vesicle formation and phase behavior in. Added surfactant can change the phase behavior of aqueous. Phase behavior in mixture of cationic and anionic surfactants in aqueous solutions article pdf available in colloid and polymer science 2732. The kinetic and mechanistic aspects of surfactant phase behaviour. The salinity tolerance precipitation phase boundary is measured for a mixed anionicnonionic surfactant system above the cmc. Phase behavior and microstructure in aqueous mixtures of cationic and anionic surfactants eric w. Phase behavior of highly immiscible polymer blends stabilized. Surface chemistry of surfactants and polymers wiley online. Micellization and phase behavior of binary mixtures of. Phase behavior of aqueous solutions containing nonionic.
The interfacial tension ift between the aqueous surfactant solutions and the crude oil are measured at different concentrations of the surfactants using a spinning drop tensiometer. The effect of temperature and additions of dtab dodecyltrimethylammonium bromide. Precipitation of catanionic surfactant and mixed micelles formation are observed over the concentration range investigated. Effects of hardness and cosurfactant on phase behavior of. Phase behavior of ionic microemulsions utrecht university. Phase behavior of aqueous solutions of a dimeric surfactant. A measurement of surfactant concentrations showed that the aqueous phase. Phase behavior and microstructure in aqueous mixtures of. Surfactants may act as detergents, wetting agents, emulsifiers, foaming agents, and dispersants. The typical sequences of phases formed by amphiphiles in aqueous systems, as composition or temperature is varied, will be discussed. The author describes the elements of thermodynamics and phase science which help determine the behavior of surfactants in both the binary aqueous and ternary systems involving an electrolyte or an oil. Laughlin, journal of colloid and interface science on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Spontaneous vesicle formation and phase behavior in mixtures of an anionic surfactant with imidazoline compounds yamaira i.
These systematic observations of micellar attraction. Aqueous phase behavior of isosorbidebased nonionic surfactants. The problems associated with the handling and use of such. Read phase behavior of aqueous solutions containing nonionic surfactantpolyethylene glycol mixtures, international journal of pharmaceutics on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Effects of urea on the microstructure and phase behavior of aqueous solutions of polyoxyethylene surfactants carolina l. Mixtures of anionic and cationic surfactants in water display interesting phase behavior and a range of microstructures, including small micelles, rodlike micelles, lamellar phases and vesicles. We next evaluated the phase diagrams of systems containing the gemini surfactant with different types of cosolvents and toluene as the oil phase. This behavior is ascribed to nonequilibrium surface tension effects in the aqueous layer 4. Review of the aqueous phase behavior of surfactants, by r. The aqueous phase behavior of surfactants colloid science. Phase behavior of aqueous mixtures of cationicanionic. Phase behavior of highly immiscible polymer blends stabilized by a balanced block copolymer surfactant joon h. Phase behavior of aqueous twophase systems of cationic and anionic surfactants and their application to theanine extraction junwei zhang, yan wang, and qijun peng the key laboratory of food colloids and biotechnology, ministry of education, school of chemical and material engineering, jiangnan university, wuxi 214122, p.
423 171 349 146 1131 1195 1156 618 1047 1356 872 1000 19 1263 986 1175 926 808 1175 370 1469 579 1120 43 724 1043 1460 788 1138 1013 1043 1050 1412 1355 475 1156 403 587 480 577 819 488 432 190 465 1105