Abstract
The distribution coefficient of some alcohols and alkanes between water and micelles at 298.15 K have been calculated from solubility measurements in aqueous solutions of sodium dodecyl sulfate (NaDDS) with and without added salt. The total solubilities of alcohols and alkanes in aqueous solutions of NaDDS increase with the solubility in the aqueous medium. Simultaneously the distribution coefficients decrease. Addition of salt leads to a decrease in the total solubilities and a corresponding increase in the distribution coefficients. The results suggest that the solubility of the alcohol or alkane in the aqueous phase as well as the micellar aggregation number play a significant part in the solubilization process. The localization of the solubilizate in the micelles have been briefly discussed, and it is suggested that the alcohols are solubilized both at the micellar surface and in the micellar interior.
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