A Study of the Solubilization of Polar Oily Materials by Sodium Dodecyl Sulfate

The difference due to carbon-chain lengths and kinds of polar groups in the solubilizing phenomenon caused by Sodium Dodecyl Sulfate (SDS) of polar normal fatty acids and polar normal alcohols has been studied in terms of the amount of solubilization, the viscosity, and the surface tension. The amount of solubilization decreased with an increase in the number of carbon atoms in the molecules of oily materials, and it was larger for normal fatty acids than for normal higher alcohols with the same number of carbon atoms in the molecule. It was found that the oily materials of a greater amount of solubilization exhibited a small viscosity and a small rate of the reduction of surface tension.