含可交换动态共价键的液晶聚合物驱动器

陈巧梅; 杨洋; 危岩; 吉岩

doi:10.11777/j.issn1000-3304.2019.19004

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含可交换动态共价键的液晶聚合物驱动器

专论 | 更新时间：2021-01-26

- 含可交换动态共价键的液晶聚合物驱动器
- Liquid Crystalline Polymer Actuators with Exchangeable Dynamic Covalent Bonds
- 高分子学报 2019年50卷第5期页码：451-468
- 作者机构：
  
  生命有机磷化学及化学生物学教育部重点实验室清华大学化学系　北京 100084
- 作者简介：
  
  [ "吉岩，女，1977年出生，现任清华大学化学系副教授. 本科及硕士毕业于天津大学；2006年在北京大学获得博士学位；2006 ~ 2011年在英国剑桥大学从事博士后研究，2011年底加入清华大学. 2017年获国家自然科学基金优秀青年基金资助. 主要研究领域为含动态共价键的高分子、液晶弹性体、高分子纳米复合材料等" ]
- 基金信息：
  
  国家自然科学基金(基金号 21674057, 51722303)资助项目()
- DOI：10.11777/j.issn1000-3304.2019.19004
  中图分类号：
- 纸质出版日期：2019-5，
  
  网络出版日期：2019-3-18，
  
  收稿日期：2019-1-7，
  
  修回日期：2019-1-24，
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陈巧梅, 杨洋, 危岩, 吉岩. 含可交换动态共价键的液晶聚合物驱动器[J]. 高分子学报, 2019,50(5):451-468.

Qiao-mei Chen, Yang Yang, Yen Wei, Yan Ji. Liquid Crystalline Polymer Actuators with Exchangeable Dynamic Covalent Bonds[J]. Acta Polymerica Sinica, 2019,50(5):451-468.
陈巧梅, 杨洋, 危岩, 吉岩. 含可交换动态共价键的液晶聚合物驱动器[J]. 高分子学报, 2019,50(5):451-468. DOI： 10.11777/j.issn1000-3304.2019.19004.

Qiao-mei Chen, Yang Yang, Yen Wei, Yan Ji. Liquid Crystalline Polymer Actuators with Exchangeable Dynamic Covalent Bonds[J]. Acta Polymerica Sinica, 2019,50(5):451-468. DOI： 10.11777/j.issn1000-3304.2019.19004.

摘要

液晶聚合物网络(liquid crystalline polymer networks，LCNs)是一类同时具备高分子网络的熵弹性和液晶有序性的聚合物材料. 取向后的单畴LCNs在特定外界刺激下可以产生快速的宏观大形变，作为驱动器和传感器，在人工肌肉、柔性机器人和微机械体系等领域具有广阔的应用前景. 近年来，研究者开发了一种新型的将可交换动态共价键引入LCNs制备可逆形变驱动器的方法. 相比于传统制备方法，该方法不仅是全新的LCNs取向方法，而且赋予了材料一些传统永久交联LCNs不具备的新功能. 本文介绍了近年来研究者在含可交换动态共价键的LCNs驱动器方向的重要研究成果，突出介绍了本课题组在含动态共价键的LCNs驱动器方向的研究进展. 最后，对含可交换动态共价键的LCNs驱动器未来面临的挑战及发展方向进行了展望.

Abstract

Recently

polymer soft actuators have attracted massive attention among researchers. Owing to their unique features like light weight

low costs

and flexible actuations

polymer soft actuators are considered to be ideal candidates for the advanced high-tech fields such as micromechanical systems

artificial muscles

and soft robotics. Liquid crystalline polymer networks (LCNs) possess both the anisotropy property of liquid crystals and the entropy elasticity of polymer networks

standing out among the numerous reported polymer soft actuators. The most attractive property of LCNs is the reversible rapid macroscopic deformation (due to transition from isotropy to anisotropy)

which requires macroscopic orientation of liquid-crystal order. Since traditional LCNs are covalently cross-linked networks which cannot be reprocessed once synthesized (thermosets)

the aligning before the complete curing is inevitable. In the past decades

various methods and techniques have been developed for the orientation order of LCNs

including two-step crosslinking method

external fields

in situ

photoalignment

inkjet printing

soft lithography

and microfluidics. Although many progresses have been achieved

they still suffer from some inborn disadvantages such as delicate procedures

limited size

and especially the difficulty to obtain complex 3D shapes

which greatly restricted the practical applications of LCN actuators. In recent years

a novel method has been developed for preparation of LCN actuators by introducing exchangeable dynamic covalent bonds into LCNs. Owing to the exchange reactions

the orientation order could be obtained by stretching the well-cured LCNs under specific external stimuli. Compared with the traditional preparation methods

this strategy not only brings a totally new

simple

and reliable method for LCNs orientation

but also endows these materials with some brand-new functions that traditional permanent cross-linked LCNs do not possess

including easy fabrication of complex 3D structures

reprogramming

multi-shape memory

and self-healing. This review introduces the important research progress in the area of LCN actuators containing exchangeable dynamic covalent bonds in recent years

and highlights the research progress of our group. Finally

the future challenges and development directions of LCN actuators containing exchangeable dynamic covalent bonds are prospected.

关键词

液晶聚合物网络驱动器可交换动态共价键

Keywords

Liquid crystalline polymer networksActuatorsExchangeable dynamic covalent bonds

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