文献类型：期刊文献

英文题名：Self-healing siloxane elastomers constructed by hierarchical covalent crosslinked networks and reversible dynamic bonds for flexible electronics

作者：Zhang, Tong[1];Su, Huixin[1];Shi, Xiangrong[2];Li, Chengpeng[1]

机构：[1]Guangdong Ocean Univ, Sch Chem & Environm Sci, Zhanjiang, Peoples R China;[2]Harbin Inst Technol, Sch Chem & Chem Engn, Harbin, Peoples R China

年份：2022

卷号：57

期号：22

起止页码：10444

外文期刊名：JOURNAL OF MATERIALS SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000805511700001)、、EI(收录号：20222212169973)、Scopus(收录号：2-s2.0-85130700039)、WOS

基金：This work was financially supported by the Guangdong Province Regional Joint Fund-Youth Fund Project (Project No. 2021A1515110597) and the Fundamental Research Funds of Guangdong Ocean University (Project No. 060302122103).

语种：英文

外文关键词：Silicones - Dynamics - Flexible electronics - Plastics - Tensile strength - Substrates - Crosslinking - Sulfur compounds - Self-healing materials

外文摘要：The rapid development of flexible electronics brings forward more requirements for self-healing substrate materials. Siloxane elastomers as an ideal substrate is widely used in the flexible electronics. However, self-healing siloxane elastomers still need to be improved in terms of mechanical properties. Herein, methacrylate /epoxy groups terminated hyperbranched polysiloxanes (HPBSi) as core was prepared to improve the mechanical properties via providing hierarchical permanent chemical cross-linked networks. A series of room-temperature self-healing siloxane elastomers are constructed by HPBSi with a linear dual-epoxy siloxane monomer through an amino disulfide compound (AFD) with reversible dynamic bonds. Especially, the content of HPBSi and AFD is systematically researched and proved to play a key role in adjusting the mechanical and self-healing properties of the siloxane elastomers. For the P1-5 containing 5 wt% HPBSi, its tensile strength is as high as 0.87 MPa that is improved about 410% compared with an elastomer without HPBSi. P11-5 elastomer with more AFD can obtain the same healing efficiency at room temperature in a shorter time (12 h) compared with 48 h of P1-5 elastomer. Finally, the self-healing siloxane is used as a flexible substrate to fabricate a strain sensor for monitoring multiple human motions, demonstrating a promising potential use in the flexible electronics. [GRAPHICS] .