一种聚硫醇材料对聚合物分散液晶薄膜电光性能的影响。
Effect of a Polymercaptan Material on the Electro-Optical Properties of Polymer-Dispersed Liquid Crystal Films.
作者信息
Sun Yujian, Zhang Cuihong, Zhou Le, Fang Hua, Huang Jianhua, Ma Haipeng, Zhang Yi, Yang Jie, Zhang Lan-Ying, Song Ping, Gao Yanzi, Xiao Jiumei, Li Fasheng, Li Kexuan
机构信息
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China.
出版信息
Molecules. 2016 Dec 30;22(1):43. doi: 10.3390/molecules22010043.
Polymer-dispersed liquid crystal (PDLC) films were prepared by the ultraviolet-light-induced polymerization of photopolymerizable monomers in nematic liquid crystal/chiral dopant/thiol-acrylate reaction monomer composites. The effects of the chiral dopant and crosslinking agents on the electro-optical properties of the PDLC films were systematically investigate. While added the chiral dopant S811 into the PDLC films, the initial off-state transmittance of the films was decreased. It was found that the weight ratio among acrylate monomers, thiol monomer PETMP and the polymercaptan Capcure 3-800 showed great influence on the properties of the fabricated PDLC films because of the existence of competition between thiol-acrylate reaction and acrylate monomer polymerization reaction. While adding polymercaptans curing agent Capcure 3-800 with appropriate concentration into the PDLC system, lower driven voltage and higher contrast ratio were achieved. This made the polymer network and electro-optical properties of the PDLC films easily tunable by the introduction of the thiol monomers.
聚合物分散液晶（PDLC）薄膜是通过在向列型液晶/手性掺杂剂/硫醇-丙烯酸酯反应单体复合材料中，对可光聚合单体进行紫外光诱导聚合来制备的。系统研究了手性掺杂剂和交联剂对PDLC薄膜电光性能的影响。当向PDLC薄膜中添加手性掺杂剂S811时，薄膜的初始关态透过率降低。研究发现，由于硫醇-丙烯酸酯反应与丙烯酸酯单体聚合反应之间存在竞争，丙烯酸酯单体、硫醇单体PETMP和多硫醇固化剂Capcure 3-800之间的重量比，对制备的PDLC薄膜性能有很大影响。当向PDLC体系中加入适当浓度的多硫醇固化剂Capcure 3-800时，可实现较低的驱动电压和较高的对比度。这使得通过引入硫醇单体，PDLC薄膜的聚合物网络和电光性能易于调节。
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