Mechanochromic Response of Spiropyran-Incorporated Liquid Crystalline Elastomer Network and the Mechanochromic Enhancement by Nano Zinc Oxide,Advanced Materials Technologies

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Mechanochromic Response of Spiropyran-Incorporated Liquid Crystalline Elastomer Network and the Mechanochromic Enhancement by Nano Zinc Oxide
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2023-07-17 , DOI: 10.1002/admt.202300175
Dongxu Han ₁ , Xiuxiu Wang ₁ , Shiyu Liu ₁ , Yuhe Zhang ₁ , Chensha Li ₁ , Yachen Gao ₂ , Jianqi Zhang ₃

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Spiropyran (SP) based mechanochromic systems are intensively interesting in the research area of mechanochromic materials. Herein, an SP mechanophore is chemically incorporated into a liquid crystalline elastomer (LCE) network through Michael addition. The rigidity of mesogens and the orientation of polymer main chains, in which the aligned mesogens and SP moieties are covalently attached, facilitate the transduction of applied force to SP mechanophore to trigger mechanochromic reaction. The LCE network provides enough elasticity for mechanochromic activation. The obtained SP-LCEs demonstrate strong and reversible mechanochromic response upon mechanical compression. The mechanochromic efficiency and sensitivity are substantially enhanced by doping the SP-LCE matrix with nano zinc oxide such that it is easy to write on the material surface by using a thin iron wire. The authors hope such SP-LCE materials will be further developed for real-time stress detection applications.

中文翻译：

掺入螺吡喃液晶弹性体网络的力致变色响应及纳米氧化锌的力致变色增强

基于螺吡喃（SP）的力致变色系统在力致变色材料的研究领域引起了人们的广泛关注。在此，SP机械载体通过迈克尔加成化学结合到液晶弹性体（LCE）网络中。介晶的刚性和聚合物主链的取向（其中排列的介晶和SP部分共价连接）有利于将施加的力传导至SP机械载体以触发机械变色反应。LCE网络为机械致变色激活提供足够的弹性。获得的 SP-LCE 在机械压缩时表现出强烈且可逆的力致变色响应。通过在 SP-LCE 基体中掺杂纳米氧化锌，显着提高了机械致变色效率和灵敏度，从而可以使用细铁丝轻松在材料表面上书写。作者希望这种 SP-LCE 材料能够进一步开发用于实时应力检测应用。

更新日期：2023-07-17

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