A fluorine-rich phenolic polyurethane elastomer with excellent self-healability and reprocessability and its applications for wearable electronics

文献类型： 外文期刊

第一作者： Jia, Yujie

作者： Jia, Yujie;Li, Ya;Jia, Yujie;Guan, Qingbao;Zhang, Luzhi;You, Zhengwei;Guan, Qingbao;Neisiany, Rasoul Esmaeely;Yan, Nina

作者机构：

关键词： fluorinated polyurethane; self-healing; phenol-carbamate bonds; reprocessability; triboelectric nanogenerator

期刊名称：SCIENCE CHINA-MATERIALS （ 影响因子：8.64； 五年影响因子：7.569 ）

ISSN： 2095-8226

年卷期： 2022 年 65 卷 9 期

页码：

收录情况： SCI

摘要： Polyurethane elastomers with covalent adaptable networks (PU-CANs) based on the dynamic urethane bond have attracted remarkable attention owing to their reprocessability, adaptability, and self-healability. However, it is still a formidable challenge to achieve excellent dynamics at low temperatures since the urethane bond energy is usually high. Herein, a fluorinated phenolic polyurethane (FPPU) elastomer with CANs based on phenol-carbamate bonds was successfully designed and prepared. Subsequently, the effects of fluorine atoms on the mechanical properties, thermal stability, reprocessability, and self-healability, surface free energy, and hydrophobicity of the prepared elastomers were systematically investigated. The FPPU elastomer showed notch-insensitivity, remarkable self-healable efficiency (98%), low dynamic dissociation temperature (60 degrees C), excellent reprocessability, and low surface energy (62 MJ m(-2)) compared with non-fluorinated counterpart phenolic polyurethane elastomer (APPU). Based on the above-mentioned features, FPPU was selected as an elastic substrate to assemble into a triboelectric nanogenerator (TENG) to harvest energy from natural motion. This TENG exhibited an excellent electrical output performance with a peak open-circuit voltage of 103 V, a peak short-circuit current of 4.7 mu A and a peak short-circuit charge of 43 nC. In addition, the TENG possessed high self-cleaning and reprocessing efficiency. Furthermore, a stretchable and self-healing composite conductor based on FPPU was fabricated for flexible electronic devices.

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[1]A fluorine-rich phenolic polyurethane elastomer with excellent self-healability and reprocessability and its applications for wearable electronics. Jia, Yujie,Li, Ya,Jia, Yujie,Guan, Qingbao,Zhang, Luzhi,You, Zhengwei,Guan, Qingbao,Neisiany, Rasoul Esmaeely,Yan, Nina. 2022

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