苯并三唑热扩散对胆甾相液晶宽带反射的光学性质

Optical properties of broadband reflection of cholesteric liquid crystal by thermal diffusion of benzotriazoles.

作者信息

Han Rui, Gan Ping, Zhang Xuetao, Shi Weiting, Li Hui, Cao Hui, Wang Huihui, Wang Dong, Yang Zhou, He Wanli

出版信息

Appl Opt. 2022 May 20;61(15):4486-4493. doi: 10.1364/AO.458594.

Abstract

Polymer stabilized cholesteric liquid crystal broadband reflective films are prepared by the thermal diffusion of a benzotriazoles organic ultraviolet (UV) absorber (UV-327) combined with photopolymerization. A gradient of UV intensity is established in the direction of film thickness, inducing the formation of a pitch gradient distribution, thus broadening the reflected bandwidth. The effects of UV-327 concentration, UV irradiation intensity, irradiation time, polymerization temperature, and C6M concentration on the reflected bandwidth of the sample are examined in detail. The results indicate that the diffusion method of the organic UV absorber enables the reflected bandwidth to be broadened under appropriate conditions.

摘要

聚合物稳定胆甾相液晶宽带反射膜是通过苯并三唑类有机紫外线（UV）吸收剂（UV-327）的热扩散结合光聚合制备的。在膜厚度方向上建立了紫外线强度梯度，诱导形成螺距梯度分布，从而拓宽了反射带宽。详细研究了UV-327浓度、紫外线照射强度、照射时间、聚合温度和C6M浓度对样品反射带宽的影响。结果表明，有机紫外线吸收剂的扩散方法能够在适当条件下拓宽反射带宽。