A photoresponsive azopyridine-based supramolecular elastomer for self-healing strain sensors

文献类型： 外文期刊

第一作者： Peng, Bowu

作者： Peng, Bowu;Li, Hui;Li, Yuntao;Wu, Min;Zhao, Chunxia;Lv, Zhen

作者机构：

关键词： Photoresponsive; Metallo-supramolecular; Self-healing; Azopyridine; Strain sensor

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.273； 五年影响因子：11.529 ）

ISSN： 1385-8947

年卷期： 2020 年 395 卷

页码：

收录情况： SCI

摘要： Optical-stimuli materials have been applied in many fields since it can be activated from external system and localized in time and space. Although, optically healable polymers have been well developed in recent years, to be healed under mild conditions remains a big challenge for these materials. Herein, we report the design and synthesis of a metallo-supramolecular polymer containing azopyridine ligands to address this conundrum. The resulting photo-healable polymer is highly stretchable (up to 735%) with a high toughness (16.33 MJ/m(3)) and excellent light-healing efficiency of similar to 90% after three cutting/healing cycles at mild temperature (40 degrees C) in various harsh conditions (e.g. underwater, subzero temperature). Furthermore, a novel bioinspired microcrack nanostructure design is presented to endow the resulted supramolecular elastomer with outstanding sensitivity to strain, which makes it very suitable for human motion monitoring applications. We believe this work will provide afflatus on future design, fabrication and application of photo-stimuli smart materials.

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