十二烷基聚氧乙烯聚氧丙烯醚(LS_(mn))序列混合体系的分子交换能及协同效应  

Molecule-Exchanging Energy and Synergistic Effect in Binary Mixed System of Linear Dodecyl Polyoxyethylene Polyoxypropylene Ether(LS_(mn))in Aqueous Solution

作　　者：汪明贵[1,2] 王宇曦[3] 唐亚芳[1] 王正武[1] 

机构地区：[1]上海交通大学农业与生物学院食品科学与工程系,上海200240 [2]兴仁县人民医院,贵州兴仁562300 [3]上海师范大学旅游学院,上海200235

出　　处：《食品与药品》2013年第2期77-80,共4页Food and Drug

基　　金：国家自然科学基金(31171642);上海市科委(1052nm06700;10DZ0504000)项目资助

摘　　要：目的评价十二烷基聚氧乙烯聚氧丙烯醚(LSmn)系列表面活性剂与不同类型表面活性剂复配的协同效应。方法测定LS36、LS45、LS54分别与离子型表面活性剂十六烷基三甲基溴化铵(CTAB)、十二烷基磺酸钠(AS)、双-2-乙基己基琥珀酸磺酸钠(AOT)及全氟辛酸钠(OBS)复配的表面张力～浓度对数关系(γ～log c)曲线,计算它们在溶液表面吸附层及胶束中的组成、分子相互作用参数及分子交换能。通过交换能,判断产生的协同效应效果。结果与结论所有混合体系的分子交换能均为负值,与纯组分的表面活性比较,复配后不论是形成胶束的能力,还是降低表面张力的效率和能力均出现显著的协同效应。Objective To evaluate the synergisms of systems between LSmn surfactants and other types of surfactants. Methods Curves of surface tension vs. the total concentration of the binary system of nonionic surfactants-linear dodecyl polyoxyethylene polyoxypropylene ether C12H25 （EO） m （PO） nH, which is also written as LSmn, with different structural ionic surfactants have been measured at 25 ℃. The series of LSmn are LS36, LS45 and LSs4, and the ionic surfactants are cetyltrimethylammonium bromide （CTAB）, sodium dodecylesulfonate （AS）, sodium of double-2- ethyl hexyl ethylene dicarboxylic acid sulfonic acid （AOT） and sodium perfiuorocarylate （OBS）. The composition, the parameters of molecule interaction and the molecule-exchanging energies both in the surface phase and in the micelle phase have been obtained from the curves. Results The molecule-exchanging energies are negative. Conclusion All the synergisms in mixed micelle formation and in surface tension reduction efficiency as well as effectiveness remarkably appear in all the studied mixtures.

关 键 词：十二烷基聚氧乙烯聚氧丙烯醚(LSmn) 非离子表面活性剂 表面张力 分子交换能 

分 类 号：TQ423.2[化学工程]