纤维素衍生物胆甾相液晶体系的结构及光学性能  

Structure and Optical Property of Cellulose Derivatives Cholesteric Liquid Crystalline System

作　　者：王林格[1] 黄勇[1] 

机构地区：[1]中国科学院广州化学研究所纤维素开放研究室

出　　处：《液晶与显示》2004年第1期10-13,共4页Chinese Journal of Liquid Crystals and Displays

基　　金：国家杰出青年基金资助项目(29925411)

摘　　要：以乙基氰乙基纤维素/丙烯酸[(E CE)C/AA]胆甾型液晶相体系为对象,通过紫外可见光谱和广角X光衍射等方法,研究了纤维素衍生物/烯类溶剂所形成的胆甾相液晶体系的结构和光学性能及光聚合对它们的影响,发现在光聚合溶剂AA后,胆甾相的结构和光性能都很好地保持在乙基氰乙基纤维素/聚丙烯酸[(E CE)C/PAA]复合物中。由于聚合过程中的溶剂收缩,λmax、P和d都有相应的减小。Structural characters and optical properties of ethyl-cyanoethyl cellulose /acrylic acid (AA) cholesteric liquid crystalline solutions and their variations caused by polymerization AA were investigated by UV-VIS spectroscopy and wide-angle X ray scattering (WAXS). After photopolymerization of the solvent AA, the supramolecular structure and the reflection property of the cholesteric order of the solution were preserved well in the (E-CE)C/poly(acrylic acid) (PAA) composites, and the helix axis maintained the original direction in the solution. However, P, λ_(max) and d were decreased due to the volume shrinkage of the AA.

关 键 词：胆甾相液晶 选择性反射 乙基氰乙基纤维素 丙烯酸 X光衍射 反射波长 光学性质 

分 类 号：O753.2[理学—晶体学]