Salt effect on solutions of nonionic surfactants and its influence on the stability of polymerized microemulsions
Salt effect on solutions of nonionic surfactants and its influence on the stability of polymerized microemulsions
复制标题
盐对非离子表面活性剂溶液的影响及其对聚合微乳液稳定性的影响
DOI：
10.1016/0021-9797(88)90058-6
复制
发表时间：
1988
影响因子：
9.9
通讯作者：
F. Candau
中科院分区：
文献类型：
--
作者：
C. Holtzscherer;F. Candau
用比浊法研究了不同盐类对非离子表面活性剂溶液浊点的影响。浊点的升高或降低可以分别用盐溶或盐析来讨论。对形成电解质的各个离子的浊点移动值的分配表明，成盐效应主要是由于阴离子与阳离子相比的突出影响。盐效应影响反相聚丙烯酰胺微乳液的稳定性。添加具有高盐析效率的电解质，如乙酸钠，诱导相变Winsor I → Winsor III。这允许单体在双连续微乳液中聚合，其特征在于低界面张力（10 - 3dyn cm-1），随后导致透明和稳定的反相微胶乳。
The effect of various salts on the cloud points of nonionic surfactant solutions has been studied by turbidimetry. The elevation or depression of cloud points can be discussed in terms of salting in or salting out, respectively. Assignment of cloud point shift values to the individual ions forming the electrolyte shows that the salting effects are mainly due to the prominent influence of the anions as compared to that of the cations. The salt effects are shown to affect the stability of inverse polyacrylamide microlatexes prepared by polymerization in nonionic microemulsions. Addition of electrolytes with high salting out efficiency, such as sodium acetate, induces the phase transition Winsor I → Winsor III. This allows the polymerization of monomers in bicontinuous microemulsions characterized by low interfacial tensions (⋍10−3dyn cm−1), which subsequently leads to clear and stable inverse microlatexes.