正负离子表面活性剂与两性表面活性剂的相互作用

本文研究正负离子表面活性剂与两性表面活性剂混合水溶液的表面性质, 以及两性表面活性剂对正负离子裘面活性剂溶解度的影响。结果表明: (1) 两性表面活性剂的加溶作用,有助于正负离子表面活性剂的溶解; (2) 加入两性表面活性剂的量适当, 混合溶液基本保持原正负离子表面活性剂的表面活性; (3) 正负离子表面活性剂与两性表面活性剂在表面层和胶团中分子间的相互作用比正负离子表面活性剂与非离子表面活性剂分子间的相互作用稍强HC-FC正负; 离子表面活性剂与两性表面活性剂混合体系在表面层中有可能形成双分子或多分子层结构。

INTERACTION BETWEEN CATIONIC-ANTONIC AND ZWITTERIONIC SURFACTANT IN MIXED AQUEOUS SOLUTIONS

Cationic-anionic surfactants have a high surface activity. But they are liable to precipitate as the concetration is slightly over cme, so their utilities are restricted. This paper describes their various surface properties and solubility phenomena when zwitterionic surfactant is mixed with them. The results indicate that (1) Owing to solubilization by the zwitterionic surfactant, the solubility of cationic-anionic surfactants is increased. (2) Proper amount of zwitterionic surfactant may keep the surface activity of the cationic-anionic surfactant essentially to be constant. (3) The molecular interaction between cationic-anionic and zwitterionic surfactants is stronger than that between cationic-anionic and nonioic surfactants in both surface layer and micelle; for HC-FC cationic-anionic and zwitterionic systems the saturated adsorption film possibly have a double-or multilayer structure.