Abstract Nanocomposites stand out as promising materials in many fields due to their properties such as strength, hardness, thermal stability, and lightness. Introducing self-healing ability to polymer nanocomposites provides new guidelines for strong, sustainable, and durable materials. Microcapsule-based self-healing materials work independently of an external stimulus such as pH, heat, light and solvent. In this paper, we developed autonomously self-healing UV-cured polyurethane graphene oxide nanocomposite coatings by means of efficient and useful copper-catalyzed azide-alkyne (CuAAC) click chemistry. Low molecular weight tetra-arm azide was successfully capsulated within poly(vinyl formal) capsules. Alkyne functional graphene-oxide reinforced nanocomposites containing azide microcapsules were prepared through photo-polymerization. The self-healing ability and anti-corrosion properties of the nanocomposites were studied after the damage occurred. The self-healing experiments show that the microcapsules provided a self-healing efficiency of around 70% after 24 h. Chemical, morphologic, mechanical, and thermal properties of the films were investigated. Furthermore, the electrochemical analysis of films showed that the microcapsule containing films has a higher polarization resistance and a lower corrosion current.

中文翻译：

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通过叠氮-炔烃点击反应制备具有自修复性能的聚氨酯石墨烯纳米复合材料

摘要 纳米复合材料因其强度、硬度、热稳定性和重量轻等特性而在许多领域成为有前途的材料。将自修复能力引入聚合物纳米复合材料为坚固、可持续和耐用的材料提供了新的指导方针。基于微胶囊的自愈材料独立于外部刺激（如 pH、热、光和溶剂）发挥作用。在本文中，我们通过有效和有用的铜催化叠氮炔（CuAAC）点击化学开发了自主自修复的紫外线固化聚氨酯氧化石墨烯纳米复合涂层。低分子量四臂叠氮化物成功封装在聚乙烯醇缩甲醛胶囊中。通过光聚合制备了含有叠氮化物微胶囊的炔官能氧化石墨烯增强纳米复合材料。研究了纳米复合材料在损伤发生后的自修复能力和防腐性能。自修复实验表明，微胶囊在 24 小时后提供了约 70% 的自修复效率。研究了薄膜的化学、形态、机械和热性能。此外，薄膜的电化学分析表明，含微胶囊的薄膜具有更高的极化电阻和更低的腐蚀电流。