Completely revised and expanded throughout, mixed surfactant systems, second edition surveys the latest results, newest experimental perspectives, and theoretical investigations of properties, behavior, and techniques applicable to mixed surfactant systems. Jagajjanani rao in partial fulfillment of the requirement for the completion of the master in technology in chemical engineering. Hydrolysis of pnitrophenyl perfluoroctanoate in mixed. Competitive binding in mixed surfactant systems for single. The mixed surfactant systems examined were 1 cetyltrimethylammonium chloride ctac ndodecyl. The study is focused on evaluation of clouding phenomena of the aqueous single nonionic surfactant system triton x100 tx100 and its mixed systems with anionic aerosolot aot and cationic dodecylpyridinium chloride dpc in presence of.
Competitive binding in mixed surfactant systems for singlewalled carbon nanotube separation rishabh m. The sdsc 8 e 4 mixed surfactant system, as expected, shows marked nonideality for the cmc as a function of composition, which is shown in fig. First is the natural polydispersity of commercial surfactants which results from impurities in starting materials and variability in reaction products during their manufacture. Scamehorn micellization of binary surfactant mixtures. In this paper, the thickness and stability of common black films cbfs in two ionicnonionic mixed surfactant systems were compared based on the phase diagram of the adsorbed film. Solubilization and biodegradation of naphthalene in presence. Research article thermodynamic and interfacial properties. It was observed that the presence of ethanolamine forced the formation of mixed micelle. The interactions between an anionic surfactant, viz.
Save up to 80% by choosing the etextbook option for isbn. Temperatureinduced vesicle to micelle transition in. The systems were sodium dodecyl sulfatepolyoxyethylene 23 lauryl ether brij 35 in water and in 0. The mixed surfactant systems was achieved by adding tween80 to cetyltrimethylammonium bromide, sodium dodecyl sulphate or nonionic surfactant, polyoxyethylene20sorbitan monolaurate in the ratio. Role of interaction energies in the behavior of mixed surfactant systems. Research article thermodynamic and interfacial properties of. Chapter 2 critical micelle concentration of surfactant. Jan 11, 20 mixed surfactant systems were always found to have higher foamability than the individual surfactant. Pdf clouding behavior of nonioniccationic and nonionic. Bulksolution properties of cpyclctabr a mixed surfactant.
Covers chemical reactions in mixed micelles, approaches to molecular modeling of mixed surfactant aggregates, and new experimental techniques for studying mixed micelles and. In this work, results of the conductometric study of the physicochemical properties such as micellar composition. Synergistic effect of mixed surfactant systems on foam. Common black film stability and synergetic adsorption in. Nonideality at interfaces in mixed surfactant systems paul m. Mixed surfactant systems 2nd edition 9780824721503. Mixed surfactant systems for low foam applications. Turbidity studies on mixed surfactant systems in hard. Critical micelle concentration of surfactant, mixed surfactant and polymer by different methods at room temperature and its importance abstract critical micelle concentration cmc is the key point for surface chemistry as well as chemist and systematic data collection and daytoday development in this regard is very essential. Thermodynamic and interfacial properties of dtabrctabr mixed. The result reveals that with addition of small amount of nonionic surfactant to the anionic sds surfactant, a decline in the cmc value of the anionicnonionic system relative to the cmc of pure anionic surfactant was observed. Although the mixture was equivalent to surfactant t for the prevention of spots, it was inferior to surfactant t for the prevention of film formation. Instead of the regular solution theory, the thermodynamic formalism developed by aratono et al. Request pdf mixed surfactant systems technical uses of surfactants mostly involve more than one surfactant species in order to obtain synergistic effects with respect to both.
Strano, department of chemical engineering and materials science engineering, massachusetts institute of technology, 77 massachusetts. Mixed surfactant systems have been, for a long time, one of the favorite areas for experimental studies on interfacial and bulk properties of surfactants. Mixed surfactant systems to control dispersion stability. Micellization and interaction of anionic and nonionic mixed surfactant systems in water. Mixed surfactant systems were always found to have higher foamability than the individual surfactant.
Mixed surfactant systems to control dispersion stability in. Mixed surfactant systems surface chemistry of surfactants. Holland terminology for describing thermodynamic properties of nonideal mixed micellar systems sherril d. Pdf micellization and interaction of anionic and nonionic. Experimental study of cmc evaluation in single and mixed. Among different surfactants, sodium dodecyl sulfate showed the highest foamability over other surfactants. Interfacial properties of mixed surfactant systems alexander patist, surekha devi, and dinesh o. This nonideal mixing in the micelles can be looked upon as arising from the shielding of the electrical repulsions. A new method for the estimation of hardness of water in presence of an anionic. Sep 26, 2014 the first part of this chapter deals with mixed micelles in solution and how to understand and predict the critical micelle concentration cmc of surfactant mixtures, as well as the molecular composition of the micelles formed in bulk and of the assemblies formed at surfaces. Mar 18, 1997 the mixture ratio of surfactant t to surfactant l was a 1.
The stabilization observed for these mixed surfactant systems has been explained in terms of adsorption of ionic surfactant on particle surfaces and nonionic surfactant molecules penetrating the film of the ionic surfactant due to hydrocarbon chain interactions. Surfactants classification, features and applications. Pdf role of interaction energies in the behavior of. The ohio state university 2007 masters examination committee. Request pdf mixed surfactant systems technical uses of surfactants mostly involve more than one surfactant species in order to obtain synergistic effects. It was also noticeable that nonionic surfactants show good foamability when they combine with anionic and cationic surfactants. Thermodynamic and interfacial properties of dtabrctabr. The overview begins with a general description of mixed surfactant solutions, followed by a more detailed examination of mixed micelles, surfactant mixtures at interfaces, and the phase behavior of mixed systems.
In many applications mixtures of an ionic and a nonionic surfactant are common. Effect of hydrophobic properties of nonionic surfactant on mixed micelle formation. Mixed surfactant systems 2nd edition masahiko abe arthur t. Surfactant mixtures form micelles that almost invariably include all the surfactant species present. Surface chemistry of surfactants and polymers wiley online. Surfactant system an overview sciencedirect topics. Technical uses of surfactants mostly involve more than one surfactant species in order to obtain synergistic effects with respect to both efficiency and effectiveness. Thermodynamic studies of mixed ionicnonionic surfactant systems. Mixed surfactant systems are encountered in nearly all practical applications of surfactants. Synergism and polymorphism in mixed surfactant systems. Surface chemistry of surfactants and polymers wiley.
Solution properties of anionicnonionic mixed surfactant systems, masahiko abe and keizo ogino. Mixed micelle formation in the binary mixtures of dodecyltrimethylammonium bromide dtabr and cetyltrimethylammonium bromide ctabr surfactants in waterethanolamine mixed solvent systems has been studied by conductometric method in the temperature range of 298. Skin irritation potential of mixed surfactant systems. Mixed surfactant systems 2nd edition by masahiko abe and publisher routledge. Interaction between binary surfactant mixtures containing anionic surfactants viz. The properties and behavior of mixed surfactant systems are discussed in the context of experimental techniques and modeling. Jan 11, 20 foam and surface tension behaviors of different ionicnonionic surfactant solutions along with their different combinations have been investigated. Mixed surfactant systems american chemical society. Modeling polydispersity in multicomponent nonideal mixed surfactant systems.
Sep 26, 2014 chapters 11 and 12 discuss adsorption and surface and interfacial tension, while chapters 16 deal with mixed surfactant systems. Global phase diagrams of mixed surfactantpolymer systems. Catanionic systems it is now established that most of the mixed cationicanionic surfactant systems, commonly known as catanionic systems, precipitate at equimolar con centrations at very high water content. The first part of this chapter deals with mixed micelles in solution and how to understand and predict the critical micelle concentration cmc of. The mixed surfactant systems examined were 1 cetyltrimethylammonium chloride ctac. Summary technical uses of surfactants mostly involve more than one surfactant species in. Thermodynamic studies of mixed ionicnonionic surfactant. Presents a broad survey of the properties, behavior, and modeling of mixed surfactant systems, including mixed micellar solutions, phenomena at interfaces, phase behavior, and mixtures with unusual surfactant types. Biodegradability of single and mixed surfactant formulations. The effect of using mixtures of surfactants on micelle formation, monolayer formation, solubilization, adsorption, precipitation, and cloud point phenomena is. Chapter 17, 18 and 19 address microemulsions, colloidal stability and the rheology of polymer and surfactant solutions. Mixed surfactant systems for low foam applications huntsman. At non equimolar concentration, the mixture forms micelles.
Sep 23, 2012 furthermore, the cmc value of sds as an ionic surfactant in the presence of nonionic surfactants was also examined. Foaming and foam stability for mixed polymer surfactant. Typically, models for mixed micellization have been based on an equilibrium thermodynamic approach. A literature survey shows that considerable e orts have been made on the study of mixed surfactant systems to characterize micelles and their formation in water. Solution behaviour of mixed surfactant systems in the. Pdf composition of mixed anionicnonionic surfactant micelles.
Mixed surfactant systems surface chemistry of surfactants and. Turbidity studies on mixed surfactant systems in hard water. Alkyl halide uptake and atmospheric implications a thesis presented in partial fulfillment of the requirements for the degree master of science in the graduate school of the ohio state university by kandice l. Effect of c eo mixed surfactant systems on the formation. The radius of the mixed micelle with the electric double layer is larger for a nonionic surfactant including longer alkyl chain length or shorter polyoxyethylene chain. Micellar catalysis in mixed anioniccationic surfactant. Conductivity studies of binary mixtures of ionic and non. The widely used pseudophase separation approach assumes that the mixed.
47 288 1383 116 1076 1055 1529 1352 359 36 153 732 1165 1321 393 1518 569 93 661 753 1238 829 843 313 994 876 913 1161 948 151 1204 1174