混合反胶束的电导与微结构研究

反胶束是两亲分子在非极性溶剂中形成的一种有序组合体，在医药、化工、采油、胶束催化及酶催化等领域中有重要应用．与胶束溶液相比，人们对反胶束的形成与结构的了解至今仍不充分．特别是对于由混合表面活性剂形成的反胶束的研究几乎无人涉及．本文采用动态光散射、电导及荧光光谱等手段对阴离子表面活性剂AOT与非离子表面活性剂形成的混合反胶束进行了研究，旨在探讨利用表面活性剂的复配来调节和控制反胶束的结构和性能．亚实验部分二异辛基磺化琉璃酸钠（AOT，Sigma公司）；Brij30为含4个氧乙烯基（EO基）的十二碳醇（AcrosOrgani…

Investigation on the Conductivity and Microstructure of Mixed Reverse Micelles

Properties and microstructure of mixed reverse micelles of anionic surfactant AOT and nonionic surfactants in n-heptane were investigated using conductivity, fluorescence probe,and dynamic light scattering. As in the reverse micelle formed with AOT alone, a conductivity maximum was also observed in conductivity-W,(molar ratio of water to surfactants) curves for mixed reverse micellar systems, and W0,mex (W, at the conductivity maximum) moves to a smaller value with the increase of nonionic surfactants contents and their EO chain length. This phenomenon was interpreted in terms of the results of dynamic light scattering and the microstructure of the mixed reverse micelles. The fluorescent behaviour of fluorescence probe Ru(bPy)2+ in mixed reverse micelles indicates that W0, at which the hydration of head groups of surfactants finished, decreases with the increase of nonionic surfactants contents, but increases with their EO chain length at a constant ratio of nonionic surfactants to AOT.