阳离子表面活性剂相图和微乳液结构的电导研究

考察了醇类（正丁醇、正己醇、正辛醇和正癸醇）和油（正辛烷）含量对十六烷基三甲基溴化铵（ＣＴＡＢ）／醇／正辛烷／水体系相图的影响，并用电导法确定了微乳液的结构（Ｗ／Ｏ、Ｂ．Ｃ．和Ｏ／Ｗ）；同时考察了ＮａＣｌ浓度和盐类（ＮａＣｌ、ＣａＣｌ２和ＡｌＣｌ３）对ＣＴＡＢ／正丁醇／水体系溶致液晶的影响．结果表明：正辛烷含量（１０％）恒定时，醇破链增长，微乳液区域减小；醇（正丁醇）固定时，体系中油含量增加，微乳液区域也减小．ＣＴＡＢ／正丁醇／水体系包合一个富水Ｌ１（Ｏ／Ｗ）区、富油Ｌ２（Ｗ／Ｏ）区和液晶Ｌ．Ｃ．区；盐的加入，液晶区域增大，且盐浓度越大，离子电荷数越高，液晶区域越大．

PHASE DIAGRAMS FOR CATIONIC SURFACTANT SYSTEM AND MICROEMULSION STRUCTURES DETERMINED BY CONDUCTIVITY

The effect of alcohols (n-butanol, n-hexanol, n-octanol and n-decanol)and hydrocarbon (n-octane)on phase behaviour for the system of cetyltrimethylammonium bromide(CTAB)/alcohols/n-octane/water was studled and the structures of microemuision were determined at 40C with conductivity. At the same time, the effect of salt kinds (NaCl.CaCl2 and AlCl3 )and NaCI concentrations on lyotropic liquid crystalline for the system of CTAB /n- butanol / water was also studied. The results show that microemulsion regions all decrease as the increase of the length of alcohols at the constant content of n-octane,and as the increase of hydrocarbon content at constant cosurfactant. Lyotropic liquid crystalline regions increases as the increase of salt concentrations and cationic ionic valence.