油酸钠/十二烷基麦芽糖苷混合体系溶液的聚集行为  

Aggregation behavior of sodium oleate/n-dodecyl-β-Dmaltoside blend system

作　　者：牛迪[1] 李嘉诚[1] 张世鑫[1] 魏思宝[1] 李晓璇[1] 

机构地区：[1]海南大学海南优势资源化工材料应用技术教育部重点实验室,海南海口570228

出　　处：《日用化学工业》2013年第4期243-247,共5页China Surfactant Detergent & Cosmetics

基　　金："十二五"国家科技支撑计划资助项目(2011BAEO6B06-7;2011BAEO6B04-7);海南省重点科技计划资助项目(ZDXM20120003);海口市重点科技计划资助项目(2011-0104)

摘　　要：通过表面张力法和荧光探针法研究了阴离子表面活性剂油酸钠(NaOA)与非离子表面活性剂n-十二烷基-β-D-麦芽糖苷(DDM)组成的二元混合体系分别在水和体积分数为20%的乙二醇水溶液中的聚集行为。利用Rubingh模型和Maeda模型得到的相互作用结果一致,表明NaOA/DDM混合体系在水和20%的乙二醇水溶液中均存在协同效应,在NaOA摩尔分数达到0.4时,混合体系的协同效应均达到最强。乙二醇的加入增大了混合体系的临界胶束浓度,降低了表面活性剂的吸附效率。荧光测试结果表明,乙二醇能够破坏胶束结构,减小胶束聚集数,增加微环境极性。Aggregation behavior of binary surfactant blends of anionic surfactant sodium oleate （NaOA） and nonionic surfactant n - dodecyl - β - D - maltoside （DDM） in water and in 20% ethylene glycol （EG） aqueous solution were investigated respectively by surface tension and fluorescence probe methods. Results with respect to the interaction shown from Rubingh＇ s theory and Maeda＇ s model were in agreement. Such results indicated that strong synergic effect exists between the two components of the blend surfaetant systems. When the molar fraction of NaOA in the blend is about 0. 4, the synergic effect achieves a maximum state. Critical micelle concentration of the blend system increases and the adsorption efficiency of surfactant decreases with addition of EG. Moreover, fluorescence study showed that EG can destroy the micellar structure, reduce the micellar aggregation number and increase microenvironment polarity.

关 键 词：表面活性剂 混合极性溶剂 表面性质 协同效应 胶束聚集数 

分 类 号：TQ423[化学工程]