Polymer Network Film with Double Reflection Bands Prepared Using a Thermochromic Cholesteric Liquid Crystal Mixture,ACS Applied Materials & Interfaces

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Polymer Network Film with Double Reflection Bands Prepared Using a Thermochromic Cholesteric Liquid Crystal Mixture
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-03-26 , DOI: 10.1021/acsami.4c00865
Tingting Wang ₁ , Jinghua Zhao ₁ , Limin Wu ₂ , Wei Liu ₁ , Yi Li ₁ , Yonggang Yang ₁

Affiliation

Cholesteric liquid crystal polymer network (CLCN) films with a single reflection band have found applications for decoration and anticounterfeiting. The CLCN films with double reflection bands were more suitable for these applications. Herein, they were prepared by using thermochromic cholesteric liquid crystals (CLCs) through a two-step photopolymerization approach. At the first step, due to oxygen inhibition, the CLC monomers near the substrate surface were polymerized at a certain temperature. At the second step, those near the air were polymerized at another temperature. The wavelengths of these two reflection bands of the CLCN film were dominated by the two polymerization temperatures. Based on this approach, patterns with composite colors were prepared, which were suitably applied for decoration. Moreover, a double-layered CLCN film with a broad reflection band was prepared that could potentially be applied for displays.

中文翻译：

使用热致变色胆甾型液晶混合物制备的具有双反射带的聚合物网络薄膜

具有单一反射带的胆甾型液晶聚合物网络（CLCN）薄膜已在装饰和防伪方面得到应用。具有双反射带的 CLCN 薄膜更适合这些应用。在此，它们是通过使用热致变色胆甾型液晶（CLC）通过两步光聚合方法制备的。第一步，由于氧的抑制，靠近基材表面的CLC单体在一定温度下发生聚合。第二步，接近空气的物质在另一个温度下聚合。 CLCN 薄膜的这两个反射带的波长由两个聚合温度决定。在此基础上，制备了适合装饰的复合颜色图案。此外，还制备了具有宽反射带的双层 CLCN 薄膜，有望应用于显示器。

更新日期：2024-03-26

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