荷兰埃因霍温理工大学的Albert P. H. J. Schenning团队近日开发出用于混合丙烯酸酯-氧杂环丁烷液晶的波长选择性光聚合反应。这一研究成果发表在2021年2月23日出版的国际学术期刊《德国应用化学》上。

该研究团队报道了一种混合丙烯酸酯-氧杂环丁烷胆甾型液晶单体混合物的波长选择性光聚合反应。研究人员通过控制正交自由基和阳离子光聚合反应的顺序和速率，可以控制生成的液晶互穿网络中相分离的程度。

研究人员表示，这一反应可以用来调节生成的结构性彩色涂层的反射颜色。反之，结构色也可以用于监控相分离的程度。这一新的光聚反应可以在三个维度上构造液晶网络，这在制造具有可编程功能特性的液晶聚合物材料方面具有巨大的潜力。

附：英文原文

Title: Wavelength‐Selective Photopolymerization of Hybrid Acrylate‐Oxetane Liquid Crystals

Author: Davey C. Hoekstra, Bodine P.A.C. van der Lubbe, Tom Bus, Lanti Yang, Nadia Grossiord, Michael G. Debije, Albert P. H. J. Schenning

Issue&Volume: 2021-02-23

Abstract: We report on the wavelength‐selective photopolymerization of a hybrid acrylate‐oxetane cholesteric liquid crystal monomer mixture. By controlling the sequence and rate of the orthogonal free‐radical and cationic photopolymerization reactions, it is possible to control the degree of phase separation in the resulting liquid crystal interpenetrating networks. We show that this can be used to tune the reflective color of the structurally colored coatings produced. Conversely, the structural color can be used to monitor the degree of phase separation. Our new photopolymerization procedure allows for structuring liquid crystal networks in three dimensions, which has great potential for fabricating liquid crystal polymer materials with programmable functional properties.

DOI: 10.1002/anie.202101322

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202101322