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Mixed solubilization of benzene and cyclohexane in sodium deoxycholate micelles

1981; Elsevier BV; Volume: 82; Issue: 2 Linguagem: Inglês

10.1016/0021-9797(81)90385-4

1095-7103

D. Thomas, Sherril D. Christian,

Phase Equilibria and Thermodynamics

Sodium deoxycholate micelles of two sizes, containing about 14 and about 40 molecules, were used as a model system to study the solubilization of benzene and cyclohexane mixtures. The results show that the composition of the intramicellar solution was the same as the composition of the contacting solution. This observation means that the interior of the micelle is hydrocarbonlike. The size of the micelle does not affect the solubilization process, indicating that the configuration of the primary micelle unit probably does not change as the micelle size increases. The solubilization data were obtained by direct extraction experiments at saturation and by vapor pressure measurements made from below saturation so that the possibility of emulsion formation was eliminated.