Research on molecular organized assemblies of catanionic surfactants in formamide and formamide/water solution

Molecular organized assemblies of 1:1 mixed solution of sodium alkylcarboxylate-alkyltrimethylammonium bromide were investigated is formamide (FA) and FA/water mixtures. The critical micelle concentration (cmc) values of catanionic surfactants determined by the surface tesion curves increase as the fraction of FA in the mixed solvents increases. Above the Kraft point (similar to 45 degrees C), micellization and surface adsorption properties of mixed surfactants in FA were studied. The cmc is 0.167, 0.172 and 0.170 mol.dm(-3) for 50, 55 and 60 degrees C. The standard thermodynamic parameters of micellization for catanionic surfactants in FA were calculated according to the model of charged pseudo-phased separation. The influence of FA addition on catanionic surfactant vesicle was also studied.Chemistry, PhysicalSCI(E)中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)4121080-10871