Effect of Long Chain Alcohol on the Self Assembling Nature of CTAB/KBr/Alcohol System

Surfactants self‐assemble in bulk aqueous solution to form different microstructure. The self assembled structures may easily rearrange if parameters like concentration, ionic strength, or temperature are changed, which renders self‐assembled systems particularly interesting. Here we examine the influence of n‐nonanol and n‐decanol on the viscosity behaviour of CTAB/KBr system. The alcohols of varying concentrations were added to CTAB/KBr solutions and were kept in a hot bath at a temperature of 45 °C with proper shaking for homogeneity. The viscosity of the micellar solution was measured using Brookfield DV–II + viscometer at temperatures ranging from 25–60 °C. It is observed that the η0 is a strong function of concentration of alcohols. In the case of nonanol four regions were identified in the plot of zero shear viscosity Vs. concentration of alcohol. At low C0, viscosity is low (Region I). With increase in concentration of alcohols the spherical micelles will grow into cylinders and at higher C0, they...