Thiol-acrylate Catalyst Enabled Post-Synthesis Fabrication of Liquid Crystal Actuators

作     者：Huan Liang Ya-Wen Liu Hong-Tu Xu Yang Yang En-Jian He Zhijun Yang Yen Wei Yan Ji Huan Liang;Ya-Wen Liu;Hong-Tu Xu;Yang Yang;En-Jian He;Zhi-Jun Yang;Yen Wei;Yan Ji

作者机构：K The Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education)Department of ChemistryTsinghua UniversityBeijing100084China Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing100084China Department of ChemistryCenter for Nanotechnology and Institute of Biomedical TechnologyChung-Yuan Christian UniversityTaiwan32023China 

出 版 物：《高分子科学:英文版》 (Chinese Journal of Polymer Science)

年 卷 期：2023年第41卷第10期

页      面：1656-1662页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51722303 21674057 and 21788102) 

主　　题：Liquid crystal elastomer Vitrimer Covalent adaptable network Soft actuator 

摘      要：Synthesizing orientated liquid crystal elastomers(LCEs)via the two-stage thiol-acrylate Michael addition and photopolymerization(TAMAP)reaction is extensively ***,excess acrylates,initiators,and strong stimuli are inevitably involved in the second stage ***,we simplify the strategy through taking advantage of a volatile alkaline(originally added to catalyze the thiol-acrylate addition in the first crosslinking stage).Without excess functional groups,the residual catalyst after annealing is still enough to trigger reactions of dynamic covalent bonds at a relatively mild temperature(80℃)to program the alignment of *** reversible reaction switches off by itself after this process since the catalyst gradually but totally evaporates upon *** obtained soft actuators exhibit robust actuation during repeated deformation(over 1000 times).Many shape-morphing modes can be achieved by rationally designing orientation *** strategy not only facilitates the practical synthesis of LCE actuators,but also balances the intrinsic conflict between stability and reprogrammability of exchangeable ***,the method of applying volatile catalysts has the potential to be extended to other dynamic covalent bonds(DCBs)applied to crosslinked polymer systems.