庚烷中C_(12)-EO_x-C_(12)·2Br反胶团的形成  

Reverse Micelle Formation of C_(12)-EO_x-C_(12)·2Br in n-Heptane

作　　者：郑欧[1] 颜华[1] 龙云霞[1] 赵剑曦[1] 高绍康[1] 

机构地区：[1]福州大学化学化工学院应用化学系,福州350002

出　　处：《物理化学学报》2007年第1期64-67,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20373012);福州大学科技发展基金(2005XY06)资助项目

摘　　要：在助表面活性剂正己醇存在下,季铵盐Gemini表面活性剂C12-EOx-C12·2Br(x=1,2,3)在正庚烷中形成了反胶团.以碘光谱法测定了临界反胶团浓度(cmch),该值小于它们在水中形成正胶团时的临界浓度(cmcaq),但两者随x的变化规律一致,均呈单调增长.反胶团饱和增溶水量随x增加或温度升高而增大.With n-hexanol as cosurfactant, quaternary ammonium Gemini surfactants C12-EOx-C12·2Br （x=1,2,3） formed reverse micelles in n-heptane. The critical reverse micelle concentrations （cmch were determined using the absorption spectrum method with iodine as the probe. All values were lesser than the corresponding critical micelle concentration （cmcaq） in aqueous solution, where C12-EOx-C12·2Br formed the normal micelles. The cmch increased with increasing x, which was similar to the variation of cmcaq with x. The saturated amount of water solubilizated by the reverse micelles was enhanced by either increasing x or by raising the temperature.

关 键 词：季铵盐Gemini表面活性剂 正己醇 正庚烷溶液 反胶团 增溶水 

分 类 号：O621.25[理学—有机化学]