دانلود مقاله THE investigation of nanostructures and microstructures properties in surfactants catanionic mixture in mixed solvents containing dilute electrolyte solutions
سال انتشار: ۱۳۸۹
محل انتشار: دومین همایش علوم و فناوری مواد فعال سطحی و صنایع شوینده
تعداد صفحات: ۷
b sohrabi – department of physical chemistry iran university of science and tech
m moallemi –
s fazeli –
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.