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M. V. Poteshnova, N. M. Zadymova

Peculiarities of toluene solubilization by polyoxyethylenated nonionic surfactants aqueous solutions.

Abstract

The equilibrium solubilization of toluene and octane in aqueous solutions of different classes surfactants (Tween-80, dodecaoxyethylated para-nonylphenol, sodium dodecyl sulfate, cetylpyridinium chloride) was investigated by refractometric and UV-spectrophotometric methods. Peculiarities of toluene solubilization by polyoxyethylenated nonionic surfactants aqueous solutions were analyzed when surfactant concentrations are above critical micelle concentration. It was found that in such case, Tween-80 aqueous solutions saturated by toluene were Winsor Type I microemulsions. Different methods of solubilization investigation and various micellar systems saturation techniques (through gas phase in McBain device, by mixing of solubilizate and aqueous surfactant solutions, by direct contact of two phases without mixing) were compared. It was shown that refractometric method of solubilization determination could be used for o/w microemulsions consisting of investigated nonionic surfactants and toluene.
Moscow University Chemistry Bulletin.
2002, Vol. 43, No. 3, P. 185
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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