荧光和动态光散射方法研究两性表面活性剂胶束的聚集和相互作用  

Studies on the Aggregation and Interaction of DDAPS Micelles with Fluorescence and Light Scattering Methods

作　　者：李方[1,2] 李干佐[1,2] 汪汉卿[1,2] 安英丽[3] 

机构地区：[1]山东大学胶体与界面化学开放实验室 [2]中国科学院兰州化学物理研究所 [3]南开大学吸附与分离功能高分子材料国家重点实验室

出　　处：《高等学校化学学报》1998年第7期1117-1120,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：以芘为荧光探针、二苯酮为猝灭剂，利用荧光方法测定了两性表面活性剂Ｎ－十二烷基－Ｎ，Ｎ－二甲基氨基丙磺酸盐（ＤＤＡＰＳ）胶束在不同温度和不同ＮａＣｌ浓度下的聚集数．利用动态光散射方法得到了胶束的水力半径Ｒｈ．结果表明，ＤＤＡＰＳ的胶束聚集数和Ｒｈ值随ＮａＣｌ浓度的升高略有增大；随温度的升高而稍有下降．ＤＤＡＰＳ胶束之间的作用力以排斥力为主．Steady fluorescence and dynamic light scattering measurement were reported for dodecyldimethylammoniopropanesulfonate(DDAPS)/NaCl aqueous micellar system. The results show that the aggregation number and the hydrodynamic radius of DDAPS micelles increase slightly with the increasing of NaCl concentration and decrease slightly as the temperature rises. For the zwitterionic surfactant system we infer repulsive intermicellar interactions in spite of the absence of net charges. DDAPS behaves somewhat like an ionic surfactant. Within the scope of our investigation, DDAPS micelles exist in spherical shape.

关 键 词：聚集数 荧光 光散射 两性表面活性剂 DDAPS 胶束 

分 类 号：O647.2[理学—物理化学] O648.16[理学—化学]