琥珀酸二异辛酯磺酸钠/月桂醇聚氧乙烯醚-7混合体系在水中的溶液行为研究

Properties of Binary Mixture of Sodium 1,4-Bis(2-ethylhexyl) Sulfosuccinate/Lauryl Polyoxyethylene-7 in Water Solution

研究了琥珀酸二异辛酯磺酸钠(062)和月桂醇聚氧乙烯醚-7(AEO-7)混合体系在水中的表面性质和胶团化行为,并对理想混合胶团临界胶束浓度(CMC)^(dea)和混合体系中各组分在表面吸附层和胶团中的组成、相互作用参数和热力学参数进行分析计算。结果表明,062/AEO-7混合体系在水中不存在协同效应,但是AEO-7的加入明显降低了062的临界胶束浓度,混合胶团的形成为自发过程,胶团中062与AEO-7分子具有较弱的相互作用,表面吸附层和胶团中均富含非离子表面活性剂AEO-7。

The surface properties and micellization of binary mixture of sodium 1,4-bis(2-ethylhexyl)sulfosuccinate(062)and lauryl polyoxyethylene-7(AEO-7)were investigated in water solution.The ideal critical micelle concentration(CMCidea),the molar fraction of the different components,the interaction parameters and several thermodynamic properties of the mixed adsorbed film and micelle phase were also analysed.The results showed that synergistic effects on the mixture were not found in water solution,but with the addition of AEO-7the critical micelle concentration(CMC)of the mixture was decreased apparently comparing to the CMC of 062;the formation of mixed micelle was spontaneous and the interaction of molecules between 062 and AEO-7 was weak;the mixed absorbed film and mixed micelle were occupied mostly by AEO-7.