Surface and associated studies between Coomassie brilliant blue G250 and CTAB in Aqueous Solution

Abstract

The interaction of surfactant cetyltrimethylammonium bromide (CTAB) with anionic dye Coomassie brilliant blue G250 (CBBG250) in aqueous solution and its effect on the formation of CTAB micelles were studied by UV-Vis spectrophotometry and electrical conductivity methods. By establishing the micellar model and measuring the electrical conductivity of CTAB in CBBG250 aqueous solution, we get the values of the critical micelle concentration at different temperatures from 298.15K to 338.15K, which are essentially the same as the range of concentrations of regular change in absorbance. It suggests that the critical micelle concentration of CTAB in CBBG250 aqueous solution is larger than in aqueous solution because some surfactant molecules in micelles are associated with CBBG250 molecules.