Comparative studies of polymer-dispersed liquid crystal films via a thiol-ene click reaction
Comparative studies of polymer-dispersed liquid crystal films via a thiol-ene click reaction
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通过硫醇-烯点击反应进行聚合物分散液晶薄膜的比较研究
DOI：
10.1002/pat.4710
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发表时间：
2019
影响因子：
3.4
通讯作者：
Zhang Cuihong
中科院分区：
文献类型：
--
作者：
Zhong Tingjun;M;le Richard J;Goodby John W;Zhang Lanying;Zhang Cuihong
在这项工作中，硫醇-烯点击反应被用来通过光引发聚合制备聚合物分散液晶（PDLC）薄膜。PDLC膜通过系统地改变关键条件来制备：烯单体的种类和含量、液晶（LC）含量、固化时间和固化光强度。我们发现这些薄膜的形貌和电光特性都是可调的。当增加烯单体的烷基主链的长度时，驱动电压降低，但反过来，对比度降低。增加烯单体含量会提高驱动电压和响应时间，LC含量的增加会降低驱动电压，但对对比度有负面影响。固化条件（固化时间和UV光强度两者）的改变可用于修改PDLC膜的驱动电压、响应时间和对比度。这些比较研究将阐明智能PDLC膜商业应用的新见解。
In this work, the thiol‐ene click reaction is employed to fabricate polymer‐dispersed liquid crystal (PDLC) films by photoinitiated polymerization. The PDLC films are prepared by systematic variation of key conditions: variety and content of ‐ene monomer, liquid crystal (LC) content, curing time, and curing light intensity. We find that both the morphologies and electro‐optic properties of these films are adjustable. When increasing the length of alkyl main chain of ‐ene monomers, the driving voltages reduce, but in turn, the contrast ratio decreases. Increasing ‐ene monomer content raises the driving voltages as well as the response time, and the increase of LC content lowers the driving voltages but has a negative effect on the contrast ratio. The changes to the curing conditions (both curing time and UV light intensity) can be used to modify the driving voltages, response time, and contrast ratios of PDLC films. These comparative studies will elucidate new insights in commercial applications of intelligent PDLC films.