基于共价自适应网络的液晶弹性体:从分子设计到应用  

Liquid-crystal elastomers based on covalent adaptable networks:From molecular design to applications

作　　者：祝阳阳 徐镇田 吴飞燕 王猛 谌烈 Yangyang Zhu;Zhentian Xu;Feiyan Wu;Meng Wang;Lie Chen(College of Chemistry and Engineering/Institute of Polymers and Energy Chemistry(IPEC),Nanchang University,Nanchang 330031,China;Institute of Advanced Materials,School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]College of Chemistry and Engineering/Institute of Polymers and Energy Chemistry(IPEC),Nanchang University,Nanchang 330031,China [2]Institute of Advanced Materials,School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China

出　　处：《Science China Materials》2023年第8期3004-3021,共18页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(51973087,52173170,and 22169012);the Thousand Talents Plan of Jiangxi Province(jxsq2019201004);the Natural Science Foundation of Jiangxi Province(20212ACB203010).

摘　　要：液晶弹性体(LCEs)是一种刺激响应性材料,具有较大且可逆变形的能力,在软致动器、人造肌肉、光子器件和生物医学工程等领域引起了广泛的关注.与具有永久交联网络的传统液晶弹性体不同,具有共价自适应网络的液晶弹性体(CAN-LCEs)可以通过键交换反应引起的网络重排将多畴液晶弹性体编程为单畴液晶弹性体.此外,CAN-LCEs还具有焊接、自修复、回收、再加工或重新编程的能力.本文综述了CAN-LCEs的最新研究成果,详细讨论了基于各种类型的键交换反应的CAN-LCEs及其设计策略.同时,本文还介绍了共价自适应网络给LCEs带来的新功能,包括焊接、自愈、重塑、回收、重新编程等,并探讨了CAN-LCEs在各种领域的应用前景.最后,本文总结了这一新兴研究领域面临的挑战和潜在的未来发展方向.Liquid-crystal elastomers(LCEs)have attracted great attention as stimuli-responsive materials due to their capability of large and reversible deformation,rendering them excellent candidates for soft actuators,artificial muscles,photonic devices,and biomedical engineering.Unlike conventional LCEs featuring permanent crosslinked networks,LCEs with covalent adaptable networks(CAN-LCEs)enable program into monodomain LCEs from polydomain LCEs due to the network rearrangement induced by bond exchange reactions.In addition,the CAN-LCEs are capable of welding,self-healing,recycling,reprocessing,or reprogramming.Herein,the latest achievements of CAN-LCEs are summarized.The CAN-LCEs based on various types of bond exchange reactions and design strategies are discussed in detail.The novel properties brought by CANs,including welding,selfhealing,remolding,recycling,and reprogramming,as well as their emerging applications are also discussed.Finally,this review summarizes the challenges and potential future developments in this emerging research area.

关 键 词：刺激响应性 液晶弹性体 自适应网络 生物医学工程 交换反应 交联网络 光子器件 CAN 

分 类 号：O753.2[理学—晶体学] TB34[一般工业技术—材料科学与工程]