聚合物分散胆甾相液晶相形态调控与光电性能

夏亮; 徐琼; 陆红波; 唐龙祥; 邱龙臻

doi:10.3788/YJYXS20112603.0306

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聚合物分散胆甾相液晶相形态调控与光电性能

器件制备技术及器件物理 | 更新时间：2020-08-12

- 聚合物分散胆甾相液晶相形态调控与光电性能
- Controlling of Phase Morphologies and Electro-Optical Properties of Polymer Dispersed Cholesteric Liquid Crystal
- 液晶与显示 2011年26卷第3期页码：306-310
- 作者机构：
  
  1. 特种显示技术教育部重点实验室,特种显示技术国家工程实验室,现代显示技术省部共建国家重点实验室培育基地,安徽合肥,230009
  2. 合肥工业大学化学工程学院高分子科学与工程系,安徽合肥,230009
- 作者简介：
- 基金信息：
  
  国家"();973"();计划前研专项(No. 2010CB334704)();国家自然科学基金(No.61040015)()
- DOI：10.3788/YJYXS20112603.0306
  中图分类号： O753+.2
- 收稿日期：2010-12-24，
  
  修回日期：2011-02-15，
  
  网络出版日期：2011-06-20，
  
  纸质出版日期：2011-06-20
- 稿件说明：
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夏亮, 徐琼, 陆红波, 唐龙祥, 邱龙臻. 聚合物分散胆甾相液晶相形态调控与光电性能[J]. 液晶与显示, 2011,26(3): 306-310

XIA Liang, XU Qiong, LU Hong-bo, TANG Long-xiang, QIU Long-zhen. Controlling of Phase Morphologies and Electro-Optical Properties of Polymer Dispersed Cholesteric Liquid Crystal[J]. , 2011,26(3): 306-310
夏亮, 徐琼, 陆红波, 唐龙祥, 邱龙臻. 聚合物分散胆甾相液晶相形态调控与光电性能[J]. 液晶与显示, 2011,26(3): 306-310 DOI： 10.3788/YJYXS20112603.0306.

XIA Liang, XU Qiong, LU Hong-bo, TANG Long-xiang, QIU Long-zhen. Controlling of Phase Morphologies and Electro-Optical Properties of Polymer Dispersed Cholesteric Liquid Crystal[J]. , 2011,26(3): 306-310 DOI： 10.3788/YJYXS20112603.0306.

摘要

采用紫外光聚合诱导相分离方法制备了聚合物分散胆甾相液晶膜

系统研究了固化光强和固化温度等制备条件对薄膜的相形态的影响

并探讨了薄膜相形态与反射率的关系。研究表明:固化光强较低时相分离较完全

产生的液晶微滴尺寸较大

聚合物与液晶的界面非常光滑;增加光强会使液晶微滴尺寸变小

界面变粗糙

膜反射率逐步降低。相形态与固化温度的关系较为复杂:在温度较低时

液晶以圆形液滴的形式分散在聚合物基体中;随着固化温度升高

液晶液滴逐渐变大

并在40 ℃时形成了连续的液晶层和聚合物层的分层结构;进一步升高温度

则形成了三维的聚合物网络结构

液晶相贯穿其间。膜的反射率先随着固化温度的升高逐渐升高

而后又降低。固化光强为0.01 mW/cm

固化温度为40 ℃时

反射率达到最大值32.2 %。

Abstract

Polymer dispersed cholesteric liquid crystal (PDCLC) films are prepared by means of ultraviolet (UV) induced phase separation. The effects of UV cure power and UV cure temperature on morphology of PDCLC have been studied in detail

the relationship between morphology of PDCLC and reflectivity has also been studied. The results show that low UV cure power allows complete phase separation

large LC domains size and smooth interface between polymer and LC. Strong UV cure power results in a rough interface which also decreases the size of LC domains and reflectivity of PDCLC films. But the relationship of PDCLC morphology and UV cure temperature is complex. At low UV cure temperature

LC dispersed as circular droplets in polymer matrix. The size of LC domains become bigger which yield adjacent and uniform layers of LC and polymer when the UV cure temperature is up to 40 ℃. Higher UV cure temperature causes a type of three-dimensional polymer network structure in which LC is dispersed. Reflectivity of PDCLC films is up first and down later with UV cure temperature increasing. In this paper

the PDCLC films prepared with UV cure power 0.01 mW/cm

and UV cure temperature 40 ℃ exhibit max reflectivity of 32.2%.

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references

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