Effects of Butanol Isomers on the Mixed Micellization of TTAB/Brij 35 Mixed Surfactant Systems

The critical micelle concentration (CMC) and the counter ion binding constant (B) in a mixed micellar state of the trimethyltetradecylammonium bromide (TTAB) with the polyoxyethylene (23) lauryl ether (Brij 35) at 25 degrees C in water and in aqueous solutions of butanol isomers were determined as a function of alpha(1) (the overall mole fraction of TTAB) by the use of electric conductivity method and surface tensiometer method. Various thermodynamic parameters (X-i, gamma(i), C-i, a(i)(M), beta and Delta Hmix) were calculated by means of the equations derived from the nonideal mixed micellar model. The results say that the effects of butanol isomers on the micellization of TTAB/ Brij 35 mixtures have been in the order of n-butanol> iso-butanol> t-butanol> water.