Hoekstra Davey C, van der Lubbe Bodine P A C, Bus Tom, Yang Lanti, Grossiord Nadia, Debije Michael G, Schenning Albert P H J
Stimuli-responsive Functional Materials and Devices, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Groene Loper 3, 5612 AE, Eindhoven, The Netherlands.
Institute for Complex Molecular Systems, Eindhoven University of Technology, Groene Loper 3, 5612 AE, Eindhoven, The Netherlands.
Angew Chem Int Ed Engl. 2021 May 3;60(19):10935-10941. doi: 10.1002/anie.202101322. Epub 2021 Mar 26.
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.
我们报道了一种丙烯酸酯-氧杂环丁烷胆甾型液晶单体混合体系的波长选择性光聚合反应。通过控制正交自由基和阳离子光聚合反应的顺序和速率，可以控制所得液晶互穿网络中的相分离程度。我们表明，这可用于调节所制备的结构色涂层的反射颜色。相反，结构色可用于监测相分离程度。我们的新型光聚合方法能够在三维空间中构建液晶网络，这在制备具有可编程功能特性的液晶聚合物材料方面具有巨大潜力。
