Ionization degrees and critical micelle concentrations of hexadecyltrimethylammonium and tetradecyltrimethylammonium micelles with different counterions

Abstract

Ionization degrees (α) of micelles of hexadecyltrimethylammonium (CTAX) and tetradecyltrimethylammonium (TTAX) (X = OH-, Br-, Cl-, NO3 -, SO4 2-, and CO3 2-) were measured by a modified free electrophoresis method and by Evan's method. Cmc values for the CTAX and TTAX surfactants were also measured. Whenever possible the α and cmc values thus obtained were compared with those reported in the literature. © 1985 American Chemical Society.