单体烷基链长度对聚合物分散液晶膜电光性能的影响

曾腾; 何韬钰; 汪映寒

doi:10.37188/CJLCD.2021-0153

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单体烷基链长度对聚合物分散液晶膜电光性能的影响

器件物理及器件制备 | 更新时间：2021-09-30

- 单体烷基链长度对聚合物分散液晶膜电光性能的影响
- Effects of monomer alkyl chain length on electro-optical properties of polymer dispersed liquid crystal film
- 液晶与显示 2021年36卷第10期页码：1362-1368
- 作者机构：
  
  四川大学高分子科学与工程学院高分子材料与工程国家重点实验室, 四川成都 610065
- 作者简介：
  
  [ "曾腾(1996-), 男, 四川内江人, 学士, 2016年于华侨大学获得学士学位, 主要从事高分子材料的研究。E-mail: tengz028@foxmail.com" ]
  [ "汪映寒(1964-), 男, 安徽绩溪人, 博士, 教授, 1998年于东京工业大学获得博士学位, 主要从事液晶取向剂, 高性能聚合物质子交换膜, 环氧树脂方向的研究。E-mail: wang_yh@scu.edu.cn" ]
- 基金信息：
  
  国家自然科学基金(50973067);国家自然科学基金(51173115)
- DOI：10.37188/CJLCD.2021-0153
  中图分类号： O753.2
- 收稿日期：2021-06-26，
  
  修回日期：2021-07-12，
  
  纸质出版日期：2021-10
- 稿件说明：
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曾腾, 何韬钰, 汪映寒. 单体烷基链长度对聚合物分散液晶膜电光性能的影响[J]. 液晶与显示, 2021,36(10):1362-1368.

Teng ZENG, Tao-yu HE, Ying-han WANG. Effects of monomer alkyl chain length on electro-optical properties of polymer dispersed liquid crystal film[J]. Chinese journal of liquid crystals and displays, 2021, 36(10): 1362-1368.
曾腾, 何韬钰, 汪映寒. 单体烷基链长度对聚合物分散液晶膜电光性能的影响[J]. 液晶与显示, 2021,36(10):1362-1368. DOI： 10.37188/CJLCD.2021-0153.

Teng ZENG, Tao-yu HE, Ying-han WANG. Effects of monomer alkyl chain length on electro-optical properties of polymer dispersed liquid crystal film[J]. Chinese journal of liquid crystals and displays, 2021, 36(10): 1362-1368. DOI： 10.37188/CJLCD.2021-0153.

摘要

聚合物分散液晶（PDLC）膜是微米尺寸的液晶微滴嵌入连续聚合物基体中形成的薄膜。利用点击化学方法制备PDLC可避免传统光聚合诱导相分离法造成的染料分解等问题。本研究用4种不同烷基链长度的聚乙二醇二丙烯酸酯（PEGDA）作为原料，利用硫醇-烯点击化学反应和硫醇-异氰酸酯偶联反应合成了PDLC膜，研究烯烃单体的烷基链长度对PDLC膜电光性能的影响。结果表明，随着体系中烯烃烷基链长度增加，阈值电压（

）、饱和电压（

sat

）和对比度（CR）下降，但关态透光率（

off

）和开态透光率（

）上升。通过选用烷基链长度适当的烯烃可以制得综合电光性能良好的PDLC膜。

Abstract

Polymer dispersed liquid crystal (PDLC) is a thin film formed by liquid crystal (LC) droplets embedded in a continuous polymer matrix in the form of micron-sized droplets. The use of click chemistry method to prepare PDLC can avoid the problems of dye decomposition caused by traditional photopolymerization-induced phase separation. In this study

four polyethylene glycol diacrylates (PEGDA) of different alkyl chain lengths were used as raw materials to synthesize PDLC films through thiol-ene click reaction and thiol-isocyanate coupling reaction

to study the effects of different alkyl chain length olefin monomers on the electro-optical properties of PDLC films. The results showed that as the chain length of olefin alkyl chain in the system increased

the threshold voltage (

)

saturation voltage (

sat

) and contrast ratio (CR) decreased

while off-state transmittance (

off

) and on-state transmittance (

) increased. By selecting olefin with appropriate alkyl chain length

PDLC films with good electro-optical properties can be prepared.

关键词

Keywords

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