新型羧酸盐Gemini表面活性剂的合成及性能  

Synthesis of a New Carboxylate Gemini Surfactant and Its Properties

作　　者：秦旺盛[1] 高志农[1] 靳晓霞[1] 牛菲[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2013年第1期42-46,共5页Journal of Wuhan University:Natural Science Edition

基　　金：中央高校基本科研业务费专项资金(2012203020211);湖北省自然科学基金(200J023)资助项目

摘　　要：以丙二酸二乙酯为原料,用醇钠夺取活泼氢,利用二溴代烷烃形成联接链,再加入溴代烷取代,经水解,脱羧合成了3种同系列的羧酸盐Gemini表面活性剂,并用红外光谱,核磁共振氢谱,质谱和元素分析等手段对产物结构进行了表征.表面张力法和稳态荧光光谱法分析产物的表面性质显示,联接链碳数为6,疏水链碳数为8,10,12产物的临界胶束浓度(cmc)值分别为1.51×10-4,1.05×10-4,9.03×10-5 mol/L,对应的表面张力分别为42.09,36.30,34.96mN/m.动态光散射和透射电镜结果表明,该系列表面活性剂水溶液的浓度在cmc之上时极易形成囊泡聚集体.Carboxylate Gemini surfactants were produced from diethyl malonate which hydrogen was deprived by sodium ethoxide,then connected with alkyl chain and spacer.IR,1HNMR,and MS were used to identify their structures.Their solution properties were characterized by equilibrium surface tension and steady-state fluorescence spectroscopy of pyrene.When the connecting chain carbon number is 6,the hydrophobic chain length of 8,10,12,the product cmc are 1.51×10-4,1.05×10-4,9.03×10-5 mol/L,and the corresponding surface tensions are 42.09,36.30,34.96 mN/m.Results from TEM and DLS suggest that this series of compounds can easily form the vesicles in aqueous solution above cmc.

关 键 词：GEMINI表面活性剂 羧酸盐 囊泡 

分 类 号：O621[理学—有机化学] O647[理学—化学]