文献类型：期刊文献

英文题名：Spider silk-inspired supramolecular polydimethylsiloxane network with prominent mechanical robustness for bifunctional flexible electronics

作者：Zhang, Tong[1];Shi, Yanting[1];Chen, Weiyin[1];Huang, Jiahui[1];Li, Chengpeng[1]

机构：[1]Guangdong Ocean Univ, Sch Chem & Environm Sci, Zhanjiang, Peoples R China

年份：2024

卷号：213

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：SCI-EXPANDED(收录号：WOS:001295247600001)、、EI(收录号：20242116111501)、Scopus(收录号：2-s2.0-85193279521)、WOS

基金：This work was financially supported by the Guangdong Basic and Applied Basic Research Foundation (Project No. 2024A1515011601) , National Innovation and Entrepreneurship Training Program (Project No. 010403122301) and Scientific Research Start-up Funds of Guang-dong Ocean University (Project No. 060302122103) .

语种：英文

外文关键词：Polydimethylsiloxane; Elastomers; Self-healing; Flexible electronics

外文摘要：Self-healing and recyclable polymer elastomers are being developed to provide new prospects in building sustainable societies. Nevertheless, the synthesis of such materials still poses a significant difficulty because of the conflicting requirements between the self-healing ability and mechanical robustness for the dynamicity of crosslinks. Herein, a self-healing and recyclable supramolecular polydimethylsiloxane with outstanding tensile stress and ultrahigh mechanical toughness is constructed by synergistically incorporating dynamic disulfide bonds and multiple hydrogen bonds into a siloxane chain. The adipic dihydrazide (AD) bearing two hydrazide groups is appropriate introduced to provide multiple hydrogen bonding sites between polymer chains and improve the mechanical robustness of the crosslinked structure. The aromatic disulfide bonds contribute to shorter healing time due to the elevated dynamicity of the crosslinked network. The resulting elastomers exhibit high tensile strength (6.44 +/- 0.24 MPa), distinguished toughness (37.00 +/- 0.85 MJ m(-3)), superior elastic restorability, outstanding self-healing capability (similar to 86 %) and multiple recyclability. Furthermore, a bifunctional sensor based on this elastomer is constructed to monitor human motions and pressure changes, demonstrating the potential application in flexible stretchable electronics.