SDS/苯甲醇/H_2O体系的相行为与结构

The Phase Behavior and Structure of SDS/BA/H_2O System

SDS／苯甲醇／H2O体系能生成胶束、微乳液、层状液晶、六角状液晶等分子有序组合作，它们之间转换关系可以从凝聚能理论得到解释．来甲酸在O／W微乳液中的分配系数K＝168，表明绝大多数苯甲醇被增溶于SDS胶束相内．随重量比本甲醇／SDS增加，层状液晶中的do值几乎不变，溶剂渗透率略有增加，六角状液晶中圆柱缔合体的半径r值几乎不变，溶剂渗透率增加．

Micelle, microemulision, lamellar liquid crystal and hexagonal Iiquid crystal can be formed in SDS/BA/H2O system, and the exchanging between them can be explained by the R ratio. The value of distribution coefficient of BA in O/W microemulsion, K=168, shows that most of BA molecules should be solubilized in the SDS micelle phase.With increasing the weight ratio of BA/SDS, d0 values have almost no change and the penetration of solvent, a, slightly increases in the lamellar liquid crystal, and the radius r in hexagonal liquid crystal is almost unchanged and the penetrations of solvent, a, increase in hexagonal liquid crystal.