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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
聚集数
荧光
光散射
两性表面活性剂
DDAPS
胶束
Dodecyldimethylammoniopropanesulfonate
Aggregation number
Hydrodynamic radius
Fluorescence
Light scattering
