反应性液晶修饰的光敏聚芳醚光取向稳定性研究

铁伟伟; 张艳鸽; 郑直; 李升熙; 李香丹

doi:10.3788/YJYXS20153005.0763

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反应性液晶修饰的光敏聚芳醚光取向稳定性研究

材料物理和化学 | 更新时间：2020-08-12

- 反应性液晶修饰的光敏聚芳醚光取向稳定性研究
- Photoaligning stability of photocrosslinkable poly(arylene ether)modified by reactive mesogeons
- 液晶与显示 2015年30卷第5期页码：763-768
- 作者机构：
  
  1. 许昌学院河南省微纳米能量储存与转换材料重点实验室, 新材料与能源学院表面微纳米材料研究所,河南许昌,461000
  2. 全北国立大学应用材料研究所高分子纳米学院全州,韩国,561-756
  3. 中南民族大学催化材料科学湖北省暨国家民委-教育部共建重点实验室,湖北武汉,430074
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目(No.51243005();许昌学院校级科研基金重点项目(No.2015-10)()
- DOI：10.3788/YJYXS20153005.0763
  中图分类号： O0753+.3;TN104.3
- 收稿日期：2015-01-14，
  
  修回日期：2015-04-02，
  
  纸质出版日期：2015-10-05
- 稿件说明：
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铁伟伟, 张艳鸽, 郑直, 李升熙, 李香丹. 反应性液晶修饰的光敏聚芳醚光取向稳定性研究[J]. 液晶与显示, 2015,30(5): 763-768

TIE Wei-wei, ZHANG Yan-ge, ZHENG Zhi, LI Seung-hee, LI Xiang-dan. Photoaligning stability of photocrosslinkable poly(arylene ether)modified by reactive mesogeons[J]. , 2015,30(5): 763-768
铁伟伟, 张艳鸽, 郑直, 李升熙, 李香丹. 反应性液晶修饰的光敏聚芳醚光取向稳定性研究[J]. 液晶与显示, 2015,30(5): 763-768 DOI： 10.3788/YJYXS20153005.0763.

TIE Wei-wei, ZHANG Yan-ge, ZHENG Zhi, LI Seung-hee, LI Xiang-dan. Photoaligning stability of photocrosslinkable poly(arylene ether)modified by reactive mesogeons[J]. , 2015,30(5): 763-768 DOI： 10.3788/YJYXS20153005.0763.

摘要

采用反应性液晶通过光聚合反应与聚芳醚光取向膜复合方法

制备了平面转换(In-plane switching

IPS)液晶显示器件

并在高温状态下对其光电显示和取向稳定性能进行了研究。结果显示

与单一聚芳醚光取向膜相比

利用复合光取向膜制备的IPS器件在高温状态下的光电显示和液晶取向稳定性能都得到了明显提高

在65℃明亮显示20 h无液晶取向变化

在120℃维持2 h无明显光量渗透。在线偏振紫外光下

光敏聚芳醚薄膜发生各向异性光交联反应

其交联程度最高可达67.4%。SEM分析结果发现

反应性液晶单体在UV光照射下

在聚芳醚光取向膜表面上发生了各向异性光聚合反应

沿先前光取向方向形成长度为0.4m左右的棒状聚合物

有效限制了光取向膜中未交联的柔性基团的活动能力

进而有效增强了复合取向膜对液晶的取向稳定性。

Abstract

Photosensitive polysulfone modified by UV curable reactive mesogeons has been jointly applied for in-plane switching liquid crystal device (IPS-LCD)

and its high temperature electro-optic reliability and photoaligning stability have been further studied. It is found that modified photoaligning film shows enhanced electric-optic reliability and thermal stability (no easy axis drift under 65℃ with electric field stress of 20 h and no noticeable light leakage keeping 120℃ for 2 h) compared to pure photoalignment. It is also found that pure photoalignment before modifying shows anisotropic photo-crosslinking reaction of the side chain-chalcone moiety of polysulfone and photoreaction around 67.4% under polarized linear ultraviolet light using polarized ultraviolet absorption spectrum. Further studies with scanning electric microscopy demonstrate UV curable reactive mesogeons (RM) can be polymerized on pure photoalignment under UV irradiation

and the UV irradiation formed polymerized RM rods with averaged size around 0.4m

which restricts mobility of the unphotocrosslined flexible groups in photoalignment

is responsible for strengthening the photoaligning surface.

关键词

Keywords

references

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