On the cosurfactant concept

Experimental investigations on the action of cosurfactants are reported using atypical additives. Thus, benzene, cyclohexane, nitrobenzene, etc., were added to a W O microemulsion (H 2O/AOT/ i-C 8H 18) thereby considerably increasing the maximum amount of solubilized water at a specified temperature...

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Bibliographic Details
Published in:Journal of colloid and interface science 1979-03, Vol.68 (3), p.440-450
Main Author: Eicke, Hans-Friedrich
Format: Article
Language:English
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Summary:Experimental investigations on the action of cosurfactants are reported using atypical additives. Thus, benzene, cyclohexane, nitrobenzene, etc., were added to a W O microemulsion (H 2O/AOT/ i-C 8H 18) thereby considerably increasing the maximum amount of solubilized water at a specified temperature. This specially selected system revealed a particularly interesting insight into the mechanism of the cosurfactant action and made generalizations possible. An extension of the approximate thermodynamic treatment from a ternary (≙ microemulsion) to a pseudoternary (≙ microemulsion + additive) system has been considered. The conclusions derived from the theoretical treatment are in satisfactory agreement with the experimental findings, and predict a mutual interaction between surfactant and cosurfactant resulting in a variation of the interfacial activity of the surfactant.
ISSN:0021-9797
1095-7103
DOI:10.1016/0021-9797(79)90301-1