摘要
液晶聚合物能够在外界刺激下发生形状变化,是一类重要的柔性智能材料。其中液晶有序排列的改变诱导材料的宏观形变。光响应聚合物具有可远程操作、易于控制等特点,在刺激响应性聚合物的设计中受到了广泛关注。将具有光响应性的基团引入到液晶聚合物体系中,可以得到一系列具有重要应用前景的光致形变材料。本文综述了近年来光响应形变液晶聚合物的研究进展,总结了光响应液晶聚合物的分子设计与响应原理,包括光致异构化响应型、光致生热响应型和多重刺激响应型;介绍了光响应液晶聚合物柔性执行器在仿生功能、能量转换和柔性机器人等领域的应用;展望了未来的研究方向与应用前景。
Liquid crystal polymers(LCPs)are soft intelligent materials,which can change shape under external stimuli.The change of arrangement of liquid crystal molecules in microstructure induces a macroscopic shape-changing of LCP materials.Without changing environment,light irradiation allows remote and localized actuation of photo responsive LCPs,which makes photo-responsive LCPs especially attractive as soft actuators.Photo-responsive groups are introduced into liquid crystal polymers to obtain photo-deformable materials with important applications.This review focuses on recent research progress on photo-responsive shape-changing liquid crystal polymers.Different mechanisms of light-driven deformation are first discussed to understand the essence of photo-responsive behaviors of liquid crystal polymers,including photo-isomerization,photo-thermal effect and multi-stimuli-response.Their design principles are introduced in detail,especially the newly designed molecular structures.Furthermore,applications of photo-responsive liquid crystal polymers are highlighted,including bio-inspired actuator materials,energy-converted materials and soft robots.Finally,a brief outlook on the future development of this field is presented.
作者
郑明心
曾敏
陈曦
袁金颖
Mingxin Zheng;Min Zeng;Xi Chen;Jinying Yuan(Key Laboratory of Organic Optoelectronics&Molecular Engineering of Ministry of Education,Department of Chemistry,Tsinghua University,Beijing 100084,China)
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2021年第6期914-925,共12页
Progress in Chemistry
基金
国家自然科学基金项目(No.21871162)资助。
关键词
液晶聚合物
光响应性
柔性执行器
智能材料
偶氮苯
liquid crystal polymer
photo-responsive
soft actuator
intelligent material
azobenzene
