基于动态键的单/双网络液晶弹性体的研究进展  

Research progress of single/dual network liquid crystal elastomers based on dynamic bonds

作　　者：雷岚 韩文佳[1] 娄江 LEI Lan;HAN Wenjia;LOU Jiang(State Key Laboratory of Biobased Material and Green Papermaking,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China;School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022,China)

机构地区：[1]齐鲁工业大学(山东省科学院)生物基材料与绿色造纸国家重点实验室,济南250353 [2]济南大学化学化工学院,济南250022

出　　处：《复合材料学报》2024年第7期3372-3388,共17页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(22308179);山东省自然科学基金(ZR2022QB170);生物基材料与绿色造纸国家重点实验室开放基金(GZKF202128);齐鲁工业大学人才科研项目(2023RCKY175)。

摘　　要：动态键交联的液晶弹性体(LCEs)在外界刺激(如光、电、热等)下,能通过改变自身体积或形状执行宏观运动,具有优异的分子协同、自适应等性能,在软体机器人、人工肌肉和微流控等领域具有重要的应用前景。LCEs产生可逆形变的先决条件是实现内部液晶取向的有效控制。动态键的断裂和重组,不仅可以解耦交联网络的构筑和取向调控,还能够改善材料的再加工性能,赋予材料重塑变形、自修复和形状记忆等新的功能。因而交联网络结构(交联剂类型、结构、不同交联网络的协同)的合理设计与构筑对于构建性能优异且多功能集成的LCEs极为重要。本文综述了液晶取向控制和具有单/双动态交联(包括动态非共价键和共价键)网络的LCEs的制备与应用的研究进展,并对该领域的发展前景进行了展望。Liquid crystal elastomers(LCEs)containing dynamic cross-linking bonds are capable of undergoing macroscopic motion through alterations in volume or shape in response to external stimuli,including light,electricity,or heat.These materials demonstrate remarkable molecular cooperative effects and adaptive properties,offering considerable potential in the fields of soft robotics,artificial muscles,and microfluidics.Effective control of the internal liquid crystal orientation in LCEs is essential for achieving reversible deformation.The breakage and reformation of dynamic bonds not only decouples the construction of cross-linked networks and orientation control,but also enhances the reprocessing properties of materials,enabling new functionalities like remodeling deformation,self-healing,and shape memory.Therefore,the deliberate design and construction of cross-linked network structures,including the selection of cross-linking agents,their structures,and cooperative effects of various networks,are crucial for producing LCEs with exceptional performance and multifunctional integration.This review comprehensively discusses advancements in the preparation and application of LCEs,encompassing liquid crystal orientation control and single/double dynamic cross-linking networks(involving dynamic noncovalent and covalent bonds),and delineates future prospects for development in this field.

关 键 词：液晶取向 动态键 单/双网络 动态交联 液晶弹性体 

分 类 号：TB332[一般工业技术—材料科学与工程]