b sohrabi - department of physical chemistry iran university of science and tech
s fazeli
m moallem

the adsorption behavior at the liquid -air interface and aggregation characteristics were investigated in gemini surfactants in aqueous media containing different concentrations of conventional ionic surfactants by surface tension and conductometry measurements. also the effects of cationic conventional surfactants CCS were studied on the size and phase transition in these systems . the free energy of the mixed micellization DGmic was obtained from the critical micelle concentration CMC and degree of counter ion dissociation a values. the differences in the free energies of micellization of gemini surfactants between pure state and gemini -CCS mixtures were calculated to monitor the influence of CCS on the micellization process.

gemini surfactants, conventional ionic surfactants, surface tension, conductometry, nanostructures, microstructures