材料科学
弹性体
炭黑
呋喃
自愈
复合材料
马来酰亚胺
共价键
聚合物
高分子化学
胶粘剂
化学工程
天然橡胶
有机化学
化学
图层(电子)
病理
工程类
替代医学
医学
作者
Qian Yan,Liwei Zhao,Qiancun Cheng,Tong Zhang,Bo Jiang,Yuanjun Song,Yudong Huang
标识
DOI:10.1021/acs.iecr.9b04355
摘要
In this paper, a thermally reversible self-healing polysiloxane elastomer based on Diels–Alder (DA) chemistry was successfully prepared via polysiloxane containing maleimide groups and furan rings. The hyperbranched polysiloxane (HPSis) containing furan rings and double bonds was synthesized and introduced to improve the mechanical strength of the polymer. The mechanical strength of polysiloxane without HPSis was only 0.20 MPa; however, it can be increased to 0.87 MPa with the introduction of HPSis. Since HPSis contain multi-furan rings required for thermally reversible reactions, the addition of HPSis would not have a negative effect on self-healing performance. The cracks on the surface of polysiloxane can be self-healed in a short time, and the self-healing efficiency of polysiloxane can achieve 85%. Moreover, flexible conductive composites poly(dimethylsiloxane)/carbon black (PDMS/CB) were fabricated by mixing the polysiloxane matrix with conductive filler carbon black (CB) and can be applied in wearable flexible sensors.
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