Micelle Formation in Sodium Dodecyl Sulfate and Dodecyltrimethylammonium Bromide at Different Temperatures

Authors : Yüksel BAYRAK

Pages : 487-492

View : 15 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :pH changes as a function of concentration for sodium dodecyl sulfate insert ignore into journalissuearticles values(SDS); and dodecyltrimethylammonium bromide insert ignore into journalissuearticles values(DTAB); were observed by the addition of 1 N HCl and 1 N KOH. pH values increased up to the critical micellar concentration insert ignore into journalissuearticles values(CMC); for the SDS/HCl system and decreased for the DTAB/KOH system. In the SDS/HCl and DTAB/KOH systems, the micellar phase had a fixed composition and was homogeneous and monodisperse above the CMC. However, in the SDS/KOH and DTAB/HCl systems, pH values increased in a continuous and gradual manner below and above the CMC, and the properties of the micellar phase changed with temperature as a function of concentration, giving rise to inhomogeneity and polydispersity
Keywords : Critical micellar concentration, dodecyltrimethylammonium bromide, sodium dodecyl sulfate, hydrochloric acid, potassium hydroxide, pH, phase separation