Side-Chain Chiral Liquid Crystal Elastomers with Mildly Stimuli-Responsive, Synchronous Deformation and Color Change

Xi Yi; Lu Li; Yu-Xi Zhao; Xing-Yu You; Ke-Ke Yang

doi:10.11777/j.issn1000-3304.2025.25114

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Side-Chain Chiral Liquid Crystal Elastomers with Mildly Stimuli-Responsive, Synchronous Deformation and Color Change

更新时间：2025-07-09

- Side-Chain Chiral Liquid Crystal Elastomers with Mildly Stimuli-Responsive, Synchronous Deformation and Color Change
- Acta Polymerica Sinica Pages: 1-9(2025)
- 作者机构：
  
  四川大学化学学院环保型高分子材料国家地方联合工程实验室环境友好高分子材料教育部工程研究中心成都 610064
- 作者简介：
  
  Ke-Ke Yang, E-mail: kkyang@scu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25114
  CLC：
- CSTR：32057.14.GFZXB.2025.7433
- Received：03 May 2025，
  
  Accepted：27 May 2025，
  
  Published Online：09 July 2025，
- 稿件说明：
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尹茜, 李露, 赵予溪, 游星宇, 杨科珂. 具有温和热响应的同步变形变色侧链型手性液晶弹性体. 高分子学报, doi: 10.11777/j.issn1000-3304.2025.25114

Yi, X.; Li, L.; Zhao, Y. X.; You, X. Y.; Yang, K. K. Side-chain chiral liquid crystal elastomers with mildly stimuli-responsive, synchronous deformation and color change. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2025.25114
尹茜, 李露, 赵予溪, 游星宇, 杨科珂. 具有温和热响应的同步变形变色侧链型手性液晶弹性体. 高分子学报, doi: 10.11777/j.issn1000-3304.2025.25114 DOI： CSTR： 32057.14.GFZXB.2025.7433.

Yi, X.; Li, L.; Zhao, Y. X.; You, X. Y.; Yang, K. K. Side-chain chiral liquid crystal elastomers with mildly stimuli-responsive, synchronous deformation and color change. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2025.25114 DOI： CSTR： 32057.14.GFZXB.2025.7433.

摘要

胆甾型液晶弹性体(CLCEs)因其优异的弹性性能、独特的螺旋光子晶体结构和灵敏的刺激响应变形特性，被广泛应用于智能执行器和传感器等领域. 然而，如何在温和热刺激下实现宽波长范围的同步变形变色仍面临关键挑战. 本研究以(巯基丙基)甲基硅氧烷均聚物(PMMS)作为主链骨架，结合单官能度液晶基元与双官能度刚/柔性交联剂，通过巯基-烯点击反应构建侧链型CLCEs动态交联网络. 大量液晶基元以侧基方式悬挂于柔性骨架上，有效降低网络的转变温度；同时，引入动态二硫键赋予材料拓扑结构可重构能力. 所制备的CLCEs在25~80 ℃范围呈现优异的热致变色和力致变色(波长变化超过160 nm)能力. 典型样品还表现出良好的同步变形变色特性，验证了该材料体系在自适应智能器件中的应用潜力.

Abstract

Cholesteric liquid crystal elastomers (CLCEs) have attracted considerable attention in smart actuators and sensors due to their exceptional elasticity

unique helical photonic-crystal architectures

and highly sensitive stimulus‐response deformations behevior. However

realizing synchronous shape and color change over a wide wavelength range under mild thermal stimuli remains a major challenge. In this study

a dynamic side-chain CLCE was constructed

via

thiol-ene click chemistry

using flexible polymethylmethylsiloxane (PMMS) as backbone

in combination with monofunctional liquid‐crystal mesogens

and bifunctional rigid/soft crosslinkers. A high density of mesogenic motif was grafted onto the flexible PMMS backbone as side-chains

effectively lowering the phase-transition temperature of network; concurrently

the introduction of dynamic disulfide bonds endows the material with topological adaptability. The resulting CLCEs exhibited outstanding thermochromic and mechanochromic responses within the temperature range of 25-80 ℃

with mechanochromic shifts exceeding 160 nm across the visible spectrum. The representative sample demonstrated prominent simultaneous deformation and color-change behavior

confirming the potential of this material system in adaptive and intelligent soft devices.

关键词

Keywords

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