Solubility behavior of benzylhexadecyldimethylammonium salts in oils

摘要

The solubility of benzylhexadecyldimethylammonium salt (BHDAX) in aromatic hydrocarbons was examined as a function of temperature. The solubility curve afforded characteristic features, which corresponded to Krafft point and critical micelle concentration of ionic surfactants in water. When the molecular sizes of oil and counter ion were small, the solubility was high because of the low critical temperature. Above the critical concentration, BHDAX was assumed to aggregate in benzene based on NMR analyses.