Liu Xiaohong, Pan Xinglong, Debije Michael G, Heuts Johan P A, Mulder Dirk J, Schenning Albert P H J
Stimuli-Responsive Functional Materials and Devices, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB, Eindhoven, The Netherlands.
Soft Matter. 2020 Jun 7;16(21):4908-4911. doi: 10.1039/d0sm00817f. Epub 2020 May 26.
Narrowly dispersed, 10 micron-sized, liquid crystalline elastomer polymer actuators were first prepared via thiol-ene dispersion polymerization and then embedded and stretched in a polyvinyl alcohol film, followed by photopolymerization of the residual acrylate groups. Prolate micro spheroids in which the mesogens are aligned parallel to the long axis were obtained and showed reversible thermally driven actuation owing to nematic to isotropic transition of the liquid crystal molecules. The particles were also compressed to form disk-shaped oblate microactuators in which the mesogens are aligned perpendicular to the short axis, demonstrating that the reported method is a versatile method to fabricate liquid crystal elastomer microactuators with programmable properties.
首先通过硫醇-烯分散聚合制备了窄分布的10微米大小的液晶弹性体聚合物致动器，然后将其嵌入聚乙烯醇薄膜中并进行拉伸，随后对残余的丙烯酸酯基团进行光聚合。获得了长轴方向上液晶基元平行排列的长椭球体微球，并由于液晶分子从向列相到各向同性相的转变而表现出可逆的热驱动致动。这些颗粒还被压缩形成盘状扁微致动器，其中液晶基元垂直于短轴排列，这表明所报道的方法是一种制备具有可编程特性的液晶弹性体微致动器的通用方法。
