摘要
报导正、负离子表面活性剂混合体系的负触变性（负触变性通常只存在于某些高分子溶液及极少数粗分散体系中）．总结出负触变性的形成规律，提出了负触变性的形成机理，认为负触变性的产生是由于溶液中存在具有一定大小的层状胶团，当溶液流动时，层状胶团双层之间的平行排列方式被打乱，导致溶液粘度随时间而增加．
Negative thixotropy is a theological phenomenon defined as a reversible increase in viscosity with time when a liquid flows at constant shear rate. This phenomenon was found only in some polymers([1]) and very few dispersing systmes(2) in the past. In the present paper, we report the negative thixotropy found in some aqueous mixtures of cationic-anionic surfactants. Fig.1 shows the region in which the aqueous mixtures of dedecyltriethylammonium bromide (C12NE) and sodium dodocylsulfacte (C12S) display negative thixotropy.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1994年第8期673-675,共3页
Acta Physico-Chimica Sinica
关键词
表面活性剂
负触变性
混合体系
Negative thixotropy, Cationic-anionic surfactants
