新一代表面活性剂: Gem in is

表面活性剂Gem in i (或称dim eric) 是由两个单链单头基普通表面活性剂在离子头基处通过化学键联接而成, 因而阻抑了表面活性剂有序聚集过程中的头基分离力, 极大提高了表面活性。与当前为提高表面活性而进行的大量尝试, 如添加盐类、提高温度或将阴离子表面活性剂与阳离子表面活性剂混合相比较, Gem in i 表面活性剂是概念上的突破, 因而被誉为新一代的表面活性剂。

A New Generation of Surfactants: Gem in is

Gemini (or dimeric) surfactants are made up of two identical amphiphilic moieties covalently connected at the level of the headgroups by a spacer group. By this way the separation between the polar headgroups within gemini surfactants is strongly decreased when they aggregate and thus the surface activity is greatly enhanced. Introduction of gemini surfactants is a breakthrough in concept compared with general tests in enhancing surface activity, for example, addition of salt, increasing temperature or mixing anionic/cationic surfactants. Therefore gemini surfactants were reputed as a new generation of surfactants.