物理化学学报 >> 2005, Vol. 21 >> Issue (09): 1055-1058.doi: 10.3866/PKU.WHXB20050922

研究简报 上一篇    下一篇

小角X射线散射表征AOT/水层状溶致液晶的有序性

庄文昌; 陈晓; 杨春杰; 王庐岩; 柴永存   

  1. 山东大学胶体与界面化学教育部重点实验室, 济南 250100
  • 收稿日期:2005-01-11 修回日期:2005-03-28 发布日期:2005-09-15
  • 通讯作者: 陈晓 E-mail:xchen@sdu.edu.cn

Study of Ordering for AOT/Water Lamellar Lyotropic Liquid Crystal: Small-angle X-ray Scattering Experiments

ZHUANG Wen-chang; CHEN Xiao; YANG Chun-jie; WANG Lu-yan; CHAI Yong-cun   

  1. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100
  • Received:2005-01-11 Revised:2005-03-28 Published:2005-09-15
  • Contact: CHEN Xiao E-mail:xchen@sdu.edu.cn

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.

关键词: 小角X射线散射, 分子模拟, 层状相

Abstract: Small-angle X-ray scattering (SAXS) is utilized to study the ordering of AOT/water lamellar phase. As increasing surfactant concentration, temperature or adding cosurfactant in certain range, the arrangement 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.

Key words: SAXS, Molecular simulation, Lamellar phase