Liu Yutong, Han Rui, Zhao Xiaohui, Cao Yue, Cao Hui, Chen Yinjie, Yang Zhou, Wang Dong, He Wanli
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing 102600, China.
Molecules. 2023 Oct 12;28(20):7063. doi: 10.3390/molecules28207063.
This paper focuses on preparing broadband reflective liquid crystal films through the diffusion of monofunctional and bifunctional monomers in a photoinduced trilayer system. By combining the hydrophilic and hydrophobic liquid crystal glass surface treatment technologies, the polymer network of polymer-stabilized cholesteric liquid crystal (PSCLC) itself serves as a diffusion channel to form a trilayer cholesteric liquid crystal composite system containing bifunctional monomers, a nematic liquid crystal composite system, and a cholesteric liquid crystal composite system containing monofunctional monomers. Utilizing the difference in the polymerization rates of monofunctional and difunctional polymerizable monomers, the monomers and chiral compounds diffuse relative to each other, so that the liquid crystal pitch exhibits a gradient distribution, and the broadened reflective width can reach up to 1570 nm. There is no doubt that new and improved processes and technologies offer important possibilities for preparing and applying PSCLC films.
本文着重于通过单官能和双官能单体在光诱导三层体系中的扩散来制备宽带反射液晶薄膜。通过结合亲水性和疏水性液晶玻璃表面处理技术，聚合物稳定胆甾相液晶（PSCLC）自身的聚合物网络充当扩散通道，形成包含双官能单体的三层胆甾相液晶复合体系、向列相液晶复合体系以及包含单官能单体的胆甾相液晶复合体系。利用单官能和双官能可聚合单体聚合速率的差异，单体和手性化合物相互扩散，使得液晶螺距呈现梯度分布，拓宽后的反射宽度可达1570纳米。毫无疑问，新的和改进的工艺技术为PSCLC薄膜的制备和应用提供了重要的可能性。
