Polymer composites with self‐healing ability are highly desired for applications in advanced modern devices. Here, we report on self‐healing polymer composites consisting of silver deposited‐carbon nanotubes hybrid nanoparticles (CNT‐Ag) as fillers and self‐healable polyurethane (DAPU) as a matrix based on thermally reversible Diels‐Alder reaction. The results indicated that as the hybrid filler loading is 1 wt%, the composites not only obtained a high‐strength (~15.97 MPa) and high healing efficiency (~90.1%) by increasing filler loading after healing, but also enhance thermal conductivity (~1.65 Wm⁻¹ K⁻¹) and obviously shorten its healing progress in comparison with other composites in the case of the same healing time. Given that Ag_NPs deposited on the surfaces of the CNTs act as bridges to link the adjacent CNTs and reduce interfacial thermal resistance, which can effectively explain the reasons for the obtained high mechanical strength and healing efficiency and promoting healing progress in the polymer composites. This work may offer a novel strategy for balancing relation between mechanical property, healing ability and healing progress in the field of self‐healing materials application.

中文翻译：

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通过构建银桥促进基于Diels-Alder反应的聚合物复合材料的愈合进展

具有自我修复能力的聚合物复合材料非常需要用于先进的现代设备中。在这里，我们报告了基于热可逆Diels-Alder反应的，由银沉积碳纳米管杂化纳米颗粒（CNT-Ag）作为填充物和作为基体的自修复聚氨酯（DAPU）组成的自修复聚合物复合材料。结果表明，当杂化填料含量为1 wt％时，复合材料不仅可以通过提高愈合后的填料含量获得高强度（〜15.97 MPa）和高愈合效率（〜90.1％），而且还可以提高导热率（ 〜1.65 Wm ^-1 K ^-1），并且在相同愈合时间的情况下，与其他复合材料相比明显缩短了其愈合进度。考虑到沉积在CNT表面上的Ag_NP充当桥接相邻CNT并降低界面热阻的桥，这可以有效地解释获得高机械强度和愈合效率并促进聚合物复合材料的愈合进展的原因。这项工作可能会提供一种在自愈材料应用领域中平衡机械性能，愈合能力和愈合进度之间关系的新颖策略。