温度梯度制备宽波反射液晶薄膜

李克轩; 曹晖; 程紫辉; 张立培; 武晓娟; 杨槐; 沈卓身

doi:10.3788/YJYXS20122706.0724

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温度梯度制备宽波反射液晶薄膜

材料物理和化学 | 更新时间：2020-08-12

- 温度梯度制备宽波反射液晶薄膜
- Broadband Reflection Liquid Crystalline Film Prepared by Temperature Gradient
- 液晶与显示 2012年27卷第6期页码：724-729
- 作者机构：
  
  1. 北京科技大学材料科学与工程学院北京,100083
  2. 北京大学工学院北京,100871
- 作者简介：
- 基金信息：
  
  国家自然科学基金(No. 50973010)();国家杰出青年基金(No. E030701)()
- DOI：10.3788/YJYXS20122706.0724
  中图分类号： O753+.2
- 收稿日期：2012-05-20，
  
  修回日期：2012-06-28，
  
  纸质出版日期：2012-12-15
- 稿件说明：
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李克轩, 曹晖, 程紫辉, 张立培, 武晓娟, 杨槐, 沈卓身. 温度梯度制备宽波反射液晶薄膜[J]. 液晶与显示, 2012,(6): 724-729

LI Ke-xuan, CAO Hui, CHENG Zi-hui, ZHANG Li-pei, WU Xiao-juan, YANG Huai, SHEN Zhuo-shen. Broadband Reflection Liquid Crystalline Film Prepared by Temperature Gradient[J]. , 2012,(6): 724-729
李克轩, 曹晖, 程紫辉, 张立培, 武晓娟, 杨槐, 沈卓身. 温度梯度制备宽波反射液晶薄膜[J]. 液晶与显示, 2012,(6): 724-729 DOI： 10.3788/YJYXS20122706.0724.

LI Ke-xuan, CAO Hui, CHENG Zi-hui, ZHANG Li-pei, WU Xiao-juan, YANG Huai, SHEN Zhuo-shen. Broadband Reflection Liquid Crystalline Film Prepared by Temperature Gradient[J]. , 2012,(6): 724-729 DOI： 10.3788/YJYXS20122706.0724.

摘要

合成了大螺旋扭曲力的手性化合物4

4'-2(戊基-环己基)苯甲酸异山梨醇酯(ISBB)。对60.0 m厚ISBB/液晶性单体/向列相液晶/光引发剂复合体系的液晶层的上、下表面温度施加不同温度

液晶层中形成了温度梯度。由于高温区域的液晶溶解ISBB的能力强

低温区域的ISBB会向高温区域扩散

从而在液晶薄层中形成了ISBB的浓度梯度与螺距梯度。紫外光聚合复合体系中的光可聚合单体

单体间交联聚合形成网络固定住了液晶层内的螺距梯度

从而制备出反射可见光波段的右旋圆偏振光的宽波反射液晶薄膜。

Abstract

The chiral dopant ISBB with large helical twist power was synthesized. Temperature gradient across the liquid crystal layer was formed by imposing different temperature on 60.0 m ISBB/photo-polymerizable liquid crystalline monomer/nematic liquid crystal/photoinitiator composite layer's upper and lower surfaces. Because high temperature region could dissolve more ISBB than low temperature region

ISBB would diffuse from low tempe-rature region to high temperature region

then ISBB concentration gradient and pitch gra-dient was formed across the composite layer. After irradiating the layer with ultraviolet light

crosslinking between the photo-polymerizable monomers occurred and the pitch gra-dient was fixed. Finally

a broadband reflection liquid crystalline film which could reflect light circularly polarized visible light was prepared.

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references

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