聚苯乙烯磺酸钠与N,N-十二烷基二甲基氧化胺胶束相互作用的研究  

Study of interaction of sodium poly(styrenesulfonate) with N,N-dimethyldodecylamine oxide micelles by turbidimetry, dynamic light scattering and electrophoretic ligh scattering

作　　者：冯先华[1] 周艳[1] 

机构地区：[1]湖北大学化学与材料科学学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2002年第1期59-62,共4页Journal of Hubei University：Natural Science

基　　金：湖北大学重点项目基金资助

摘　　要：采用浊度滴定法、电泳光散射法和动态激光光散射法研究了聚苯乙烯磺酸钠 (NaPSS)和N ,N -十二烷基二甲基氧化胺 (DMDAO)胶束的相互作用 .浊度滴定结果表明 :在临界胶束质子化程度为 βc 时 ,NaPSS与DMDAO胶束发生相互作用而形成可溶络合物 ,此 βc 对应于临界胶束表面电荷密度σc .动态光散射结果表明 :在不同离子强度下 ,DMDAO分别形成了球状和棒状胶束 ,采用与之对应的模型 ,计算了临界结合时的胶束表面电荷密度 .随着离子强度增加 ,σc 增加 ,表明相互作用随屏蔽效应增大而减弱 .The interaction between sodium poly(styrenesulfonate)(NaPSS) and N,N-dimethyldodecylamine oxide(DMDAO) micelles was studied using turbidimetry, electrophoretic light scattering, and dynamic light scattering. The results of turbidimetry showed that soluble complexes formed between NaPSS and DMDAO micelles at a critical degree of micelle protonation corresponding to a critical micelle surface charge density σ c. The results of dynamic light scattering indicated the formation of spherical or rodlike micelles at different ionic strengths. From different models for spherical and rodlike micelles, the σ c values were calculated, which increases with increasing ionic strength, indicating the attenuation of interaction by increased shielding. The interaction was also confirmed by electrophoretic light scattering.

关 键 词：聚苯乙烯磺酸钠 N N-十二烷基二甲基氧化胺 胶束相互作用 表面活性剂胶束 聚电解质 质子化 表面电荷密度 

分 类 号：O634[理学—高分子化学] O648.1[理学—化学]