Quadruple H-Bonding and Polyrotaxanes Dual Cross-linking Supramolecular Elastomer for High Toughness and Self-healing Conductors

作     者：Qi Jin Ruichun Du Hao Tang Yan Zhao Wansu Peng Yanyan Li Jing Zhang Tangsong Zhu Xinxin Huang Prof. Deshuo Kong Yucheng He Tianwei Bao Desheng Kong Prof. Xiaoliang Wang Prof. Rong Wang Prof. Qiuhong Zhang Prof. Xudong Jia 

作者机构：Key Laboratory of High Performance Polymer Material and Technology of MOE Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Nanjing University 210093 Nanjing P. R. China Contribution: Data curation (lead) ​Investigation (lead) Writing - original draft (lead) Writing - review & editing (lead) College of Engineering and Applied Sciences Nanjing University 210023 Nanjing P. R. China Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and Engineering Nanjing University 210093 Nanjing P. R. China State Key Laboratory of Coordination Chemistry Nanjing University 210023 Nanjing P. R. China Contribution: Conceptualization (lead) Data curation (lead) Funding acquisition (lead) ​Investigation (lead) Writing - original draft (lead) Writing - review & editing (lead) Contribution: Conceptualization (equal) Data curation (equal) ​Investigation (equal) Writing - original draft (equal) Writing - review & editing (equal) 

出 版 物：《Angewandte Chemie》 

年 卷 期：2023年第135卷第26期

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

主　　题：High Toughness Polyrotaxanes Quadruple H-Bonding Self-Healing Sliding Crosslinks 

摘      要：Tough and self-healable substrates can enable stretchable electronics long service life. However, for substrates, it still remains a challenge to achieve both high toughness and autonomous self-healing ability at room temperature. Herein, a strategy by using the combined effects between quadruple H-bonding and slidable cross-links is proposed to solve the above issues in the elastomer. The elastomer exhibits high toughness (77.3 MJ m −3 ), fracture energy (≈127.2 kJ m −2 ), and good healing efficiency (91 %) at room temperature. The superior performance is ascribed to the inter and intra crosslinking structures of quadruple H-bonding and polyrotaxanes in the dual crosslinking system. Strain-induced crystallization of PEG in polyrotaxanes also contributes to the high fracture energy of the elastomers. Furthermore, based on the dual cross-linked supramolecular elastomer, a highly stretchable and self-healable electrode containing liquid metal is also fabricated, retaining resistance stability (0.16–0.26 Ω) even at the strain of 1600 %.