【摘要】 用小角X射线散射研究了AOT/水层状溶致液晶的有序性. 通过对散射曲线的解析, 讨论了表面活性剂浓度、温度和助表面活性剂等三个方面对溶致液晶层状相结构有序性的影响. 在一定的范围内, 提高温度,改变表面活性剂浓度和加入少量助表面活性剂可使碳氢链排列由稀疏转变为密实, 层状相也相应地由“柔性双层”过渡到更加有序化的“平面双层”. 基于形状因子和体系内分子间作用力, 提出了层状相形成与有序化的机理, 同时采用分子模拟的方法展现了不同浓度下的液晶结构.更多还原

【Abstract】 Small-angle X-ray scattering (SAXS) is utilized to study the ordering of AOT/water lamellar phase. As increasingsurfactantconcentration, temperature or adding cosurfactant in certainrange, thearrangement of hydrocarbon chains will change from sparse to dense which results in the structural transformation of lamellar phase from“flexible” to“planar”bilayers. The possible mechanism is proposed based on shape factor and molecular interactions. Molecular simulations are also carried out to testify the obtained results.更多还原