阴离子表面活性剂与阳离子表面活性剂的相互作用(Ⅱ)——稀溶液性质  

Interactions between anionic surfactants and cationic surfactants(Ⅱ)——Properties in dilute solution

作　　者：杜志平[1] 王万绪[1] 

机构地区：[1]中国日用化学工业研究院,山西太原030001

出　　处：《日用化学工业》2006年第4期247-250,共4页China Surfactant Detergent & Cosmetics

摘　　要：介绍了阴离子表面活性剂与阳离子表面活性剂相互作用的稀溶液性质。在水溶液中,阴/阳离子表面活性剂混合体系因分子间极性基正/负离子的强静电吸引作用,易形成棒状胶束,浓度超过cmc后,可能发生聚集,出现浑浊、分相等情况,使用短链表面活性剂、引入聚氧乙烯链及非等摩尔复配在一定程度上可避免这种现象。均相阴/阳离子表面活性剂混合溶液,对非极性有机物的增溶存在增效作用,但对极性有机物的增溶能力则有可能下降;在一定浓度及混合比范围内还可能出现类似非离子表面活性剂的浊点效应。The interactions between anionics and cationics and their properties in dilute solution were presented. Due to strong static electronic attraction between the molecules of anionic and cationic surfactants, such blend system in aqueous solution can form rod - mieelles easily, while aggregation of mieelles, precipitation and phase - separation could occur when the eoneentration of the solution beyond its cmc. These phenomena could be avoided to a certain extent by using short chain surfactants,mixing in unequal - molar ratio and introducing polyethoxylate chain et al. Homogeneous blends of cationics and anionics has synergic effect on solubilization of non - polar organic compounds while has adverse effect on polar organic compounds. Within a certain range of concentration and molar ratio in the blend solution, cloud point effect similar to that of non - ionics could be found.

关 键 词：阴/阳离子表面活性剂混合体系 静电作用 棒状胶束 增溶能力 浊点效应 

分 类 号：O647.2[理学—物理化学]