THE investigation of nanostructures and microstructures properties in surfactants catanionic mixture in mixed solvents containing dilute electrolyte solutions

Our investigation show that the attrative interaction in the mixed micelle is lower that in the mixed monolayer at the air/water interface. Also transition from nanostructures mixed micelles to microstructures vesicles and vice versa is determined by conductometry method . in present work the adsorption behavior at the liquid -air interface and aggregation characteristics are investigated in binary ionic / ionic surfactant mixtures cetyltrimethylammonium bromide CTAB and sodium dodecyl sulfate SDS and ethylene glycol as co-solvent at different concentrations of NaBr by surface tension and conductometry measurements . minimum surface tension at cmc gcmc,maximum surface excess concentration Gmax,the minimum area per molecule at the aqueous solution/ air interface Amin , and the effectiveness of surface tension reduction Pcmc are determined in the various percentages of EG in the constant electrolye concentration.

Keywords:

anionic mixed micelles , cationic mixed micelles , surface tension , ethylene glycol , conductometry