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Title: Effect of co-solutes on the physico-chemical properties of surfactant solutions
Authors: Sansanwal, P K
Keywords: Conductance
Physico-chemical properties
Pyrene flouorescence
Surface tension
Issue Date: Jan-2006
Publisher: CSIR
Abstract: Physico-chemical studies of some aqueous surfactant solutions were carried out by employing conductance, surface tension and spectrofluorometric techniques. From conductivity and surface tension measurements, critical micelle concentration (CMC), counter-ion association (α), equivalent conductance at infinite dilution (٨0), surface excess concentration (), minimum area per molecule (Amin), surface pressure at CMC ( CMC), thermodynamic properties of micellization (mic, mic, mic) and adsorption (ads, ads and ads) have been obtained for an anionic [bis (2-ethylhexyl) sulphosuccinate sodium salt (AOT)], a cationic [cetyl trimethyl ammonium bromide (CTAB)] and a nonionic [polyethylene (23) lauryl ether (Brij-35)] surfactant solutions. Effect of mixing co-solutes (dioxane and glycerol) on the physico-chemical properties of surfactant systems at 298.15, 308.15 and 318.15 K has been investigated. Surfactants micellar characteristics and their interaction with co-solutes were also investigated by fluorescence measurements of solutions using pyrene as a fluorescence probe.
Page(s): 57-64
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.65(01) [January 2006]

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