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Molecules 2017, 22(2), 317; doi:10.3390/molecules22020317

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

1
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
3
Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China
4
College of Medical Laboratory, Dalian Medical University, Dalian 116044, Liaoning, China
5
Department of Applied Statistics and Science, Xijing University, Xi’an 710123, Shaanxi, China
6
Anshan Normal University, Anshan 114005, Liaoning, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Youngkyoo Kim and Hwajeong Kim
Received: 1 December 2016 / Revised: 2 February 2017 / Accepted: 9 February 2017 / Published: 22 February 2017
(This article belongs to the Special Issue Advances in Organic Nanophotonics)
View Full-Text   |   Download PDF [4582 KB, uploaded 22 February 2017]   |  

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. View Full-Text
Keywords: polymer dispersed cholesteric liquid crystal; liquid crystal; chiral; electro-optical performance polymer dispersed cholesteric liquid crystal; liquid crystal; chiral; electro-optical performance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sun, Y.; Gao, Y.; Zhou, L.; Huang, J.; Fang, H.; Ma, H.; Zhang, Y.; Yang, J.; Song, P.; Zhang, C.; Zhang, L.; Li, F.; Zhao, Y.; Li, K. A Study on the Electro-Optical Properties of Thiol-Ene Polymer Dispersed Cholesteric Liquid Crystal (PDChLC) Films. Molecules 2017, 22, 317.

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