A Hyper-Reflective Cholesteric Liquid Crystal Polymer Network with Double Layers

Ming Zhang,Jinghua Zhao,Zhigang Yao,Wei Liu,Yi Li,Yonggang Yang

NEW JOURNAL OF CHEMISTRY（2023）

Cited 4|Views16

Abstract

Cholesteric liquid crystal polymer networks (CLCNs) with hyper-reflectance have been widely studied for laser protection and energy-saving. Herein, double-layered CLCN films were prepared using single-layered CLCN films with opposite handedness. Since photopolymerization can be carried out in air, the double-layered CLCN films are feasible for being prepared with a large area. Due to the diffusion of the low-molecular-weight compounds of the top layer during the double-layered CLCN film preparation process, the Bragg reflection band of the bottom layer shifts to a long wavelength. Based on this fact, colourful patterns were prepared by printing and screen-printing. These patterns are suitably applied for decoration and anti-counterfeiting. Hyper-reflective double-layered cholesteric liquid crystal network films were prepared, which can be applied for decoration and anti-counterfeiting.

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Liquid Crystals

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