Reflectance properties of polymer‐stabilised cholesteric liquid crystals cells with cholesteryl compounds of different functionality
Reflectance properties of polymer‐stabilised cholesteric liquid crystals cells with cholesteryl compounds of different functionality
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DOI：
10.1080/02678290701749925
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发表时间：
2008-01
期刊：
影响因子：
2.2
通讯作者：
Jinbao Guo;Jie Sun;Kexuan Li;H. Cao;Huai Yang
中科院分区：
文献类型：
--
作者：
Jinbao Guo;Jie Sun;Kexuan Li;H. Cao;Huai Yang
本文介绍了不同官能度的胆甾醇类化合物的合成。一系列聚合物稳定的双相液晶（PSCLC）电池通过含有非反应性液晶、双丙烯酸酯和上述胆固醇化合物的双相液晶（Ch-LC）混合物的光聚合来制备。评价胆固醇化合物官能度对PSCLC电池的形态和反射特性的影响，如聚合温度等参数。结果表明，更高官能度的胆固醇化合物对于加宽Ch-LC复合材料的反射带更有效，这被推测是局部网络环境中的音高差异的结果。扫描电子显微镜用于检查的PSCLC细胞的聚合物网络的形态。我们已经发现，聚合物网络的形态是由胆固醇化合物的官能度以及聚合温度决定的，这进一步影响复合材料的反射性能。
In this paper, we describe the synthesis of cholesteryl compounds of different functionality. A series of polymer‐stabilised cholesteric liquid crystal (PSCLC) cells are prepared by photo‐polymerisation of a cholesteric liquid crystal (Ch‐LC) mixture containing a non‐reactive liquid crystal, a nematic diacrylate and the above cholesteryl compounds. The effect of cholesteryl compound functionality on the morphology and the reflectance properties of PSCLC cells is evaluated, as are parameters such as the polymerisation temperature. The results indicate that the higher functional cholesteryl compound is more effective for broadening the reflection band of the Ch‐LC composites, which is speculated to be a result of the pitch differences in the local network environment. Scanning electron microscopy is used to examine the morphologies of the polymer network of the PSCLC cells. We have found that the morphologies of the polymer network are determined by the functionality of the cholesteryl compounds as well as polymerisation temperature, which further influence the reflectance properties of the composites.