Electro-Optical Properties of Low-Threshold Voltage PDLC Films

LIU Guo-zhu; HUANG Zi-qiang; YANG Wen-jun; XIA Du-ling; ZHANG Cui-yu; KANG Gui-zhen

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Electro-Optical Properties of Low-Threshold Voltage PDLC Films

Device Technology & Physics | 更新时间：2020-08-12

- Electro-Optical Properties of Low-Threshold Voltage PDLC Films
- Chinese Journal of Liquid Crystals and Displays Vol. 24, Issue 3, Pages: 383-388(2009)
- 作者机构：
  
  1. 电子科技大学光电信息学院,四川成都,610054
  2. 电子科技大学电子薄膜与集成器件国家重点试验室,四川成都 610054,E-mail: gzliuuestc@163.com
- 作者简介：
- 基金信息：
- DOI：
  CLC： O753+.2
- Received：06 October 2008，
  
  Revised：02 January 1900，
  
  Published Online：30 June 2009，
  
  Published：30 June 2009
- 稿件说明：
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刘国柱;黄子强;杨文君;夏都灵;张翠玉;康桂珍. 低阈值电压聚合物分散性液晶膜的电光特性[J]. 液晶与显示, 2009,24(3): 383-388

LIU Guo-zhu;HUANG Zi-qiang;YANG Wen-jun;XIA Du-ling;ZHANG Cui-yu;KANG Gui-zhen. Electro-Optical Properties of Low-Threshold Voltage PDLC Films[J]. 液晶与显示, 2009,24(3): 383-388
刘国柱;黄子强;杨文君;夏都灵;张翠玉;康桂珍. 低阈值电压聚合物分散性液晶膜的电光特性[J]. 液晶与显示, 2009,24(3): 383-388 DOI：

LIU Guo-zhu;HUANG Zi-qiang;YANG Wen-jun;XIA Du-ling;ZHANG Cui-yu;KANG Gui-zhen. Electro-Optical Properties of Low-Threshold Voltage PDLC Films[J]. 液晶与显示, 2009,24(3): 383-388 DOI：

摘要

采用聚合物诱导相分离(PIPS)方法制备了PDLC膜

研究了不同单体材料、温度、光强等对PDLC膜电光特性的影响。发现Bi-EMA-2和EHMA混合单体(质量组分为1 ∶ 9)与液晶C70/02CN在折射率方面匹配较好

且在偏光显微镜下液晶微滴与聚合物单体的晶相边界清晰

易制备成对比度较高、阈值电压和饱和驱动电压较低的PDLC膜。温度和光强是控制和维持液晶与单体之间相分离速度平衡的重要工艺因素

直接影响到相分离过程中的液晶微滴形貌尺寸及其分布均一性

进而影响PDLC膜电光性能的优劣。通过工艺条件的优化

最终制备出了阈值电压为0.18 V/m、饱和驱动电压为0.4 V/m的PDLC膜。

Abstract

PDLC films are prepared by means of polymeriztion induced phase separation(PIPS).The electro-optical properties of PDLC films are influenced by many factors

which include cure temperature

ultraviolet intensity

different monomer materials and so on.These factors are mainly investigated.It can be found that the refractive index between admixture monomer (the mass ratio of Bi-EMA-2(A) and EHMA(E) is 1 ∶ 9) and liquid crystals (C70/02CN) is matched

and the grain boundary of LC droplets and monomer is distinct by polarized microscope. Meanwhile

cure temperature and ultraviolet intensity

which can maintain dynamic balance of the process of phase separation

are very important factors of arts and crafts. The intensity of temperature and ultraviolet directly influence on the LC droplets morphologies and uniformity of them in the phase separation

thus affect the performance of PDLC filmsE-O properties. In this text

the PDLC film provided with low-threshold voltage 0.18 V/m and low saturation driving voltage 0.4 V/m is finally prepared by optimizing the arts and crafts.

关键词

Keywords

references

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