Fan Yanru, Cao Meiwen, Yuan Guangcui, Wang Yilin, Yan Haike, Han Charles C
Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China.
J Colloid Interface Sci. 2006 Jul 15;299(2):928-37. doi: 10.1016/j.jcis.2006.02.029. Epub 2006 Mar 20.
The aggregation behavior of mixed systems of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) or sodium bis(4-phenylbutyl) sulfosuccinate (SBPBS) with nonionic surfactant pentaethylene glycol mono-n-dodecyl ether (C12E5) have been studied by means of steady-state fluorescence, electrical conductivity, dynamic light scattering, transmission electron microscopy, electrophoretic light scattering and pyrene solubilization measurements. The critical concentrations for aggregation, micropolarity, mobility, solubilization capacity and morphology of aggregates are characterized. Two critical concentrations for aggregation are observed in the mixed surfactants, which may correspond to the formation of different kinds of aggregates. Moreover, it is more favorable for AOT-C12E5 to form mixed vesicles compared to SBPBS-C12E5 at higher mole fraction of C12E5. In addition, it is revealed that SBPBS-C12E5 mixture has larger solubilization capacity for pyrene than AOT-C12E5 system.
通过稳态荧光、电导率、动态光散射、透射电子显微镜、电泳光散射和芘增溶测量等手段，研究了双（2-乙基己基）磺基琥珀酸钠（AOT）或双（4-苯基丁基）磺基琥珀酸钠（SBPBS）与非离子表面活性剂五乙二醇单正十二烷基醚（C12E5）混合体系的聚集行为。对聚集的临界浓度、微极性、迁移率、增溶能力和聚集体形态进行了表征。在混合表面活性剂中观察到两个聚集临界浓度，这可能对应于不同种类聚集体的形成。此外，在C12E5摩尔分数较高时，与SBPBS-C12E5相比，AOT-C12E5更有利于形成混合囊泡。此外，还发现SBPBS-C12E5混合物对芘的增溶能力比AOT-C12E5体系更大。
