文献类型：期刊文献

英文题名：A human muscle-inspired, high strength, good elastic recoverability, room-temperature self-healing, and recyclable polyurethane elastomer based on dynamic bonds

作者：Wang, Shanshan[1] Chen, Xingyu[1] Guo, Lizhen[2] Wang, Sasa[3] Dong, Fuhao[2] Liu, He[2] Xu, Xu[1]

第一作者：Wang, Shanshan

通信作者：Xu, X[1];Dong, FH[2]

机构：[1]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Int Innovat Ctr Forest Chem & Mat, Jiangsu Prov Key Lab Chem & Utilizat Agroforest,Co, Nanjing 210037, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Key Lab Biomass Energy & Mat, Natl Engn Lab Biomass Chem Utilizat, Key & Open Lab Forest Chem Engn,Insti Chem Ind For, Nanjing 210042, Jiangsu, Peoples R China;[3]Guangxi Minzu Univ, Guangxi Collaborat Innovat Ctr Chem & Engn Forest, Key Lab Chem & Engn Forest Prod, Guangxi Key Lab Chem & Engn Forest Prod,State Ethn, Nanning 530006, Peoples R China

年份：2024

卷号：248

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20240415439559);Scopus(收录号：2-s2.0-85182913071);WOS:【SCI-EXPANDED(收录号:WOS:001166892600001)】；

基金：This work was supported by Projects from the National Natural Science Foundation of China (32171722), the National Natural Science Foundation of China (32071708) and the Open Project of Guangxi key Laboratory of Forest products Chemistry and Engineering (GXFK2301). Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (ATPP), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

语种：英文

外文关键词：Biological inspiration; Polyurethane elastomers; Dynamic bonds; Application

摘要：Polyurethane elastomers have been widely used in aerospace engineering, intelligent electronics, smart buildings, and other high-tech fields. However, preparing polyurethane elastomers with self-healing at room temperature, high toughness, and strength, remains a significant challenge. Hence, inspired by human muscles, A room-temperature self-healing and recyclable polyurethane elastomer was developed. This elastomer possesses tough, high strength, and good elastic recoverability by adjusting the structure of its hard domains. In detail, the obtained polyurethane elastomers exhibit a high tensile strength of 30.3 MPa, an elongation at break of 1114.6 %, toughness of 126.4 MJ/m(3), fracture energy of 96.4 kJ/m(2), and remarkable anti-fatigue properties as demonstrated by cyclic tensile. Meanwhile, the introduction of asymmetric aliphatic ring structure into the hard domain structure is beneficial for accelerating the exchange rate of dynamic bonds in polyurethane elastomers, resulting in a healing efficiency is up to 90.8 %. In addition, the mechanical properties of the resultant polyurethane elastomers are not lost after being recycled three times. Finally, the polyurethane elastomer is used as the substrate for electromagnetic shielding material, and the electromagnetic shielding efficiency was investigated. This study demonstrates the design of self-healing elastomers at room temperature with high toughness and strength, which provides a new avenue for the development of sustainable electronic materials in the future.