Study on selective reflection properties of chiral nematic liquid crystalline composites with a non‐uniform pitch distribution
Study on selective reflection properties of chiral nematic liquid crystalline composites with a non‐uniform pitch distribution
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DOI：
10.1080/02678290802562706
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发表时间：
2008-11
期刊：
影响因子：
2.2
通讯作者：
W. Huang;Z. Bian;Kexuan Li;Jiu-mei Xiao;H. Cao;Huai Yang
中科院分区：
文献类型：
--
作者：
W. Huang;Z. Bian;Kexuan Li;Jiu-mei Xiao;H. Cao;Huai Yang
报道了具有结晶（Cr）-手性双（N*）相变的可光聚合单体/手性掺杂剂复合物的颗粒的制备。通过在Cr相中混合具有不同间距的N* 相的颗粒，并通过在平面取向的N* 相中的光聚合使液晶（LC）单体分子交联，获得具有不均匀间距分布的N*-LC复合膜。实验结果表明，通过控制N* 相颗粒的间距长度，可以精确控制复合膜的反射谱带宽和反射带位置。研究了聚合温度和UV强度对N*-LC复合膜的非均匀螺距分布的影响。
The preparation is reported of particles of photopolymerisable monomer/chiral dopant composites with a crystalline (Cr)‐chiral nematic (N*) phase transition. By mixing particles with different pitches of the N* phase in the Cr phase and crosslinking the liquid crystal (LC) monomer molecules by photopolymerisation in the planarly oriented N* phase, an N*‐LC composite film with a non‐uniform pitch distribution was obtained. Experimental results show that the bandwidth of the reflection spectrum and the location of reflection band of the composite films can be controlled accurately by controlling the pitch lengths of the N* phase of the particles. Effects of polymerisation temperature and UV intensity on the non‐uniform pitch distribution of N*‐LC composite films were investigated.