Abstract
The electrical surface potential of ionic micelles of sodium dodecyl sulfate, dodecyltrimethylammonium bromide, and dodecyltrimethylammonium chloride was theoretically assessed using a simplified nonlinear Poisson-Boltzmann equation. The values obtained were compared with those reported under various counter ion concentrations. They were found to vary according to the parameter values used, particularly the degree of counter ion binding to micelles. The model used for the present assessment was examined to gain a better understanding about the extent of counter ion binding and electrical potential, with micelles being regarded as polyvalent chemical species.
