Multiple dynamic bonds enable high mechanical strength and efficient room-temperature self-healable polyurethane for triboelectric nanogenerators  

作　　者：Wenwen Zhang Huixia Xuan Xiaofei Xu Jiaming Lou Qingbao Guan Zhengwei You 

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Institute of Functional Materials,College of Materials Science and Engineering,Shanghai Key Laboratory of Lightweight Composite,Research Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society),Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine,DonghuaUniversity,Shanghai 201620,China

出　　处：《Science China Chemistry》2025年第4期1468-1477,共10页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China(52173117,52073049,52473004,52303178,51673162,15201719);the China Postdoctoral Science Foundation(2023M740585);the Natural Science Foundation of Shanghai(22ZR1400700);the Shanghai Rising-Star Program(21QA1400200),the Shanghai Sailing Program(23YF1400500);the Science and Technology Commission of Shanghai Municipality(20DZ2254900);the Research Grants Council Collaborative Research Fund(C1017-22GF);the Fundamental Research Funds for the Central Universities(2232024G-12).

摘　　要：For room temperature self-healing triboelectric nanogenerators(TENGs);the inherent contradiction between mechanical strength and self-healing properties was an urgent problem to be solved.Based on the phenol-carbamate bond;this paper proposed a strategy to design a new molecular structure and coordinate the triple dynamic bonds;which provided a feasible strategy to solve this contradiction.With polytetramethylene ether glycol(M_n=1;000)as the soft segment in the main chain of polyurethane(PU);meanwhile methylene diphenyl diisocyanate and 4;4'-dihydroxybiphenyl(BP)as the hard segment and chain extension agent;respectively;the combination of tetrad benzene ring endowed the resultant 4BP-PU withπ-πinteraction.The effective reversible dissociation and association with hydrogen bond not only bestowed 4BP-PU with high mechanical strength(16.14 MPa);but also promoted high self-healing efficiency(94.8%)at room temperature.4BP-PU was selected as the elastic substrate between polydimethylsiloxane and copper sheet to prepare a self-healing TENG to collect energy from natural motion.Consequently;the rational molecular structure design provided new ideas for developing self-healing materials and fabricating energy harvest electronics.

关 键 词：POLYURETHANE self-healing phenolic urethane bonds mechanical property triboelectric nanogenerator 

分 类 号：O631.3[理学—高分子化学]