Self-Healing Polysiloxane Elastomer Based on Integration of Covalent and Reversible Networks,Industrial & Engineering Chemistry Research

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Self-Healing Polysiloxane Elastomer Based on Integration of Covalent and Reversible Networks
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-11-12 , DOI: 10.1021/acs.iecr.9b04355
Qian Yan ₁ , Liwei Zhao ₁ , Qiancun Cheng ₁ , Tong Zhang ₁ , Bo Jiang ₁ , Yuanjun Song ₁ , Yudong Huang ₁

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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.

中文翻译：

基于共价和可逆网络集成的自修复聚硅氧烷弹性体

在本文中，通过包含马来酰亚胺基团和呋喃环的聚硅氧烷成功地制备了一种基于Diels-Alder（DA）化学性质的热可逆自修复聚硅氧烷弹性体。合成并引入了具有呋喃环和双键的超支化聚硅氧烷（HPSis），以提高聚合物的机械强度。没有HPSis的聚硅氧烷的机械强度仅为0.20 MPa。但是，通过引入HPSis可以将其提高到0.87 MPa。由于HPSi包含热可逆反应所需的多呋喃环，因此添加HPSi不会对自愈性能产生负面影响。聚硅氧烷表面的裂纹可在短时间内自我修复，聚硅氧烷的自我修复效率可达到85％。而且，

更新日期：2019-11-13

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