酯基Gemini型季铵盐表面活性剂与AEO_9的复配体系研究

Study on the Esterquat Gemini Surfactant/AEO_9 Mixed System

通过考察酯基Gem in i型季铵盐表面活性剂Ⅱ-10-n(n=3,4,6)与十二烷基聚氧乙烯(9)醚(AEO9)的复配体系的表面活性发现,复配体系的临界胶团总浓度CMCT值介于二元复配体系中各组分的临界胶团浓度CMC01和CMC02之间。当溶液中含有少量AEO9时(在溶液体相中的摩尔分数α2=0.1),混合胶团中AEO9的摩尔分数均已超过0.35;随着溶液中AEO9含量的增大,混合胶团中逐渐以AEO9为主成分。复配体系的混合胶团聚集数介于二元复配体系中各组分的胶团聚集数之间,随着溶液中酯基Gem in i型季铵盐表面活性剂含量的增加,混合胶团聚集数逐渐减少。

The surface activity and mixed micellization of esterquat Gemini surfactant Ⅱ-10-n（n = 3,4,6）, and polyethyleneglycol（9） mono-dodecyl ether（AEO9） in aqueous solution have been investigated using surface tension measurement. The results show that the values of the total critical micelle concentration of Ⅱ-10-n/AEO9 mixed systems lie always among CMC1^0 and CMC2^0, which are the critical micelle concentrations for individual surfactant 1 and 2 respectively. Addition of a few nonionic surfactant, AEO9, for example α2 = 0.1, the molar fraction of AEO9 in the mixed micelle exceeds 0.35. With further increasing the concentration of the nonionic surfactant in solution, the main component in the mixed micelles becomes gradually AEO9. The values of the aggregation number of the mixed micelles lie among N1 and N2, which are the micellar aggregation number for individual 1 and 2 respectively. The values of the aggregation number of the mixed micelles decreases gradually with increasing the molar fraction of Ⅱ-10-6 in solution.