一些阴离子／阳离子二元混合体系的增溶行为

研究了十二烷基聚氧乙烯（约含3个EO基团）硫酸三乙醇铵（TADPS）分别与十六烷基三甲基溴化铵（CTABr）、氯化十六烷基毗院（CPCI）以及氯化十二烷基吡啶（DPCI）的二元混合体系对正庚烷、正辛醇以及甲苯的饱和增溶行为。结果表明，混合体系在增溶方面的协同效应取决于增港物的极性或增港物在胶团中的位置．对增溶于胶团内核的非极性正庚烷，TAPDS／CTABr体系显示出较强的实际正协同效应，最大添加浓度（MAC）可用Nishikido的阴离子-阳离子复合物理想增港模型来预测；对既可增溶于胶团的内核，又可增溶于胶团栅栏中的微极性的甲苯，三个混合体系皆表现出实际的正协同效应；但对增溶于胶团栅栏，与表面活性剂形成混合胶团的两亲物质正辛醇，TAD－PA／CTABr体系显示出负协同效应，并且增溶物在胶团相和水相中的分布系数符合Treiner的非理想增溶模型。这些结果表明，阴离子／阳离子混合体系在胶团强化超滤（MEUF）技术中具有潜在的应用前景。

Solubilization Behaviors in Some Binary Anionic/Cationic Surfactant Systems

The solubilization behaviors of n -heptane,l -octanol and toluene in anionic/cationic binary mixtures oftriethanol ammonium dodecylpolyoxyethylene sulfate (TADPS, containing ca. 3 ethylene oxide units ) with hexade-cyltrimethylammonium bromide(CTABr), hexadecylpyridinium chloride (CPCl ) and dedecylpyridinium chloride (DPCl),are studied respectively. The results show that,the synergism in solubilization of anionic/cationic binary mixtures dependson the polarity of solubilizate or their location in micelles. For nonpolar n-heptane which is usually solubilized in the coreof the micellle, practically positive synergistic effects are observed and the maximum additive concentration (MAC)inTADPS/CTABr binary system can be well predicted by Nichikido's ideal solubilization model which considers that themixed micelle is composed of anionic-cationic complex and excess monometric cationic or anionic surfactant ;for toluene,a slightly polar aromatic hydrocarbon which can be solubilized in both the core and palisade layer of the micelle,practicallypositive synergistic effets in all three binary systems are obtained ;for I-octanol,an amphiphile usually solubilized in pal-isade of micelle or formed mixed micelle with surfactant,however,negative synergistic effect is observed and the distribu-tion coefficient between micelle phase and water phase in TADPS/CTABr system can'be well predicted by Treiner's nonideal model. These results reveal a potential application of anionic/cationic binary surfectant systems in micellar enhancedultrafiltration (MEUF )