Supertough spontaneously self-healing polymer based on septuple dynamic bonds integrated in one chemical group  

作　　者：Luzhi Zhang Qingbao Guan Ao Shen Rasoul Esmaeely Neisiany Zhengwei You Meifang Zhu 

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-dimension Materials(Donghua University),College of Materials Science and Engineering,Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine,Institute of Functional Materials,Donghua University,Research Base of Textile Materials for Flexible Electronics and Biomedical Applications,China Textile Engineering Society,Shanghai 201620,China [2]Department of Materials and Polymer Engineering,Hakim Sabzevari University,Sabzevar 9617976487,Iran

出　　处：《Science China Chemistry》2022年第2期363-372,共10页中国科学(化学英文版)

基　　金：supported by the National Key Research and Development Program of China(2021YFC2101804,2021YFC2101802);the National Natural Science Foundation of China(52173117,51733002,52073049,21991123);the Belt&Road Young Scientist Exchanges Project of Science and Technology Commission Foundation of Shanghai(20520741000);the Natural Science Foundation of Shanghai(20ZR1402500);Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-dimension Materials(Donghua University)(18520750400);the Science and Technology Commission of Shanghai Municipality(20DZ2254900);the Fundamental Research Funds for the Central Universities,DHU Distinguished Young Professor Program(LZA2019001)。

摘　　要：The development of spontaneously self-healing materials with excellent mechanical properties remains a formidable challenge despite the extensive interest in such materials.This is because the self-healing and mechanical properties of a material are usually optimized via contradictory routes.The present study demonstrated a supertough spontaneously self-healing polymer,Fe-(2,6-diacetylpyridine dioxime)-urethane-based polyurethane(Fe-PPOU)based on septuple dynamic bonds integrated in one chemical group.A synergistic effect was induced by the presence of multiple dynamic crosslinking points,which comprised the integrated dynamic interactions,and the hidden lengths of the folded polymeric chains in Fe-PPOU.Thus,the mechanical and self-healing properties of the polymer were simultaneously optimized.Fe-PPOU demonstrated the highest reported toughness(139.8 MJ m^(-3))among all the room-temperature spontaneously self-healing polymers with a nearly 100%healing rate.Fe-PPOU exhibited instant(30 s)self-healing to reach a strength of 1.6 MPa that was higher than the original strength of numerous recently reported self-healing polymers.

关 键 词：oxime-urethane bonds hydrogen bonds metal-coordination bonds 2 6-diacetylpyridine dioxime SELF-HEALING 

分 类 号：TQ317[化学工程—高聚物工业]