The relationship between crosslinker, liquid crystal, and magnetic nanomaterial doping on electro-optical properties of PDLC

The relationship between crosslinker, liquid crystal, and magnetic nanomaterial doping on electro-optical properties of PDLC
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交联剂、液晶和磁性纳米材料掺杂对PDLC电光性能的关系

DOI:
10.1080/02678292.2021.1919767
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发表时间:
2021-04
期刊:
影响因子:
2.2
通讯作者:
He Wanli
He Wanli
中科院分区:
化学3区
文献类型:
--
作者:
Liang Zeng;Zhao Yuzhen;Gao Hong;Wang Dong;Miao Zongcheng;Cao Hui;Yang Zhou;He Wanli

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聚合物分散液晶(PDLC)是一种引人注目的材料,在光电显示器件中有着重要的作用。在相同的固化温度、UV强度和光引发剂用量的条件下,采用聚合诱导相分离(PIPS)法制备了PDLC薄膜。研究了交联剂含量、液晶含量和磁性纳米材料掺杂情况下PDLC的形貌和电光性能。不同的交联剂和液晶含量改变了共混物中的交联剂度和自由基含量,从而改变了聚合物网络的大小,同时改变了PDLC的电光性能。在Fe3O4 NPs掺杂浓度为1.0 wt%时,分散在PDLC中的磁性纳米材料建立了固有电位,降低了阈值电压(24.1 V)和饱和电压(54.5 V), CR为89.9,截止时间为14.1 ms。本工作为优化PDLC的电光性能提供了可行的方法,为PDLC的广泛应用提供了可能。图形抽象
ABSTRACT Polymer-dispersed liquid crystal (PDLC) is a striking material that has a great role in optoelectronic display devices. In this paper, PDLC films were prepared by the polymerisation-induced phase separation (PIPS) process under the same curing temperature, UV intensity, and photo-initiator dosage. The morphology and electro-optical properties of PDLC with crosslinker content, the liquid crystal content, and magnetic nanomaterial doping were comprehensively investigated. Different crosslinker and liquid crystal contents changed the crosslinker degree and free radical content in the blends, which changed the polymer network size while changing the electro-optical properties of PDLC. The magnetic nanomaterials dispersed in PDLC established the intrinsic potential and reduced the threshold voltage (24.1 V) and saturation voltage (54.5 V) were obtained at a Fe3O4 NPs doping concentration of 1.0 wt%, which led to a CR of 89.9 and a toff of 14.1 ms. This work provides a feasible method to optimise the electro-optical properties of PDLC and provides the possibility for the wide application of PDLC. Graphical abstract
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