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Molecules. 2017 Feb 22;22(2). pii: E317. doi: 10.3390/molecules22020317.

A Study on the Electro-Optical Properties of Thiol-Ene Polymer Dispersed Cholesteric Liquid Crystal (PDChLC) Films.

Sun Y1,2, Gao Y3,4, Zhou L5, Huang J6, Fang H7, Ma H8, Zhang Y9, Yang J10, Song P11, Zhang C12,13, Zhang L14,15, Li F16, Zhao Y17, Li K18.

Author information

1
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. syj_anshan@sina.com.
2
Anshan Normal University, Anshan 114005, Liaoning, China. syj_anshan@sina.com.
3
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China. gaoyanzi@pku.edu.cn.
4
Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China. gaoyanzi@pku.edu.cn.
5
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China. luoqiudehudie@163.com.
6
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. jianhua_ustb@163.com.
7
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. Fanghua0229@126.com.
8
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China. mahaipeng6666@163.com.
9
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. 5896326123@163.com.
10
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. g20158323@xs.ustb.edu.cn.
11
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China. songping1985@163.com.
12
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China. zhangcuihong@pku.edu.cn.
13
Department of Applied Statistics and Science, Xijing University, Xi'an 710123, Shaanxi, China. zhangcuihong@pku.edu.cn.
14
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China. zhanglanying@pku.edu.cn.
15
Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China. zhanglanying@pku.edu.cn.
16
College of Medical Laboratory, Dalian Medical University, Dalian 116044, Liaoning, China. lifasheng@dmu.edu.cn.
17
Department of Applied Statistics and Science, Xijing University, Xi'an 710123, Shaanxi, China. zyz19870226@163.com.
18
Department of Applied Statistics and Science, Xijing University, Xi'an 710123, Shaanxi, China. likexuan@xijing.edu.cn.

Abstract

In this study, a polymer dispersed cholesteric liquid crystal (PDChLC) film obtained via a one-step fabrication technique based on photopolymerization of a thiol-acrylate reaction system was prepared and characterized for the first time. The effects of the chiral dopant, the influence of thiol monomer functionality and content on the morphology and subsequent performance of the PDChLC films were systematically investigated. It was demonstrated that the addition of a small amount of chiral dopant slightly increased the driving voltage, but decreased the off-state transmittance significantly. Furthermore, scanning electron micrographs (SEM) shown that the liquid crystal (LC) droplet size decreased at first and then increased with the increasing amount of thiol monomer functionality, while increasing the thiol content increased the LC droplet size. Correspondingly, the electro-optical switching behavior was directly dependent on LC droplet size. By tuning the raw material composition, PDChLC film with optimized electro-optical performance was prepared.

KEYWORDS:

chiral; electro-optical performance; liquid crystal; polymer dispersed cholesteric liquid crystal

PMID:
28241442
PMCID:
PMC6155611
DOI:
10.3390/molecules22020317
[Indexed for MEDLINE]
Free PMC Article

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