HYDRODYNAMIC STUDIES OF MICELLAR SYSTEMS OF ALKYLTRIMETHYLAMMONIUM BROMIDES AND THE EFFECT OF ADDED 1-ALKANOLS

The hydrodynamic micellar properties of alkyltrimethylammonium bromides, in aqueous solution alone, and with a homologous series of aliphatic alcohols, have been examined in terms of hydrophobic interactions, intrinsic viscosity, hydration, and the electroviscous effect. The intrinsic viscosity of the micellar systems is decreased by the addition of alcohols but the effect, as the homologous series is ascended, is nonlinear. The micelles are increasingly hydrated at low alcohol concentrations and become larger and nonspherical, at high alcohol concentrations they are dehydrated and smaller in size. The addition of alcohols appears to affect the double layer thickness thus reducing the electroviscous effect. © 1979.