Abstract Graphene sheets containing porous polyhedral oligomeric silsesquioxane (POSS) framework were synthesized as nanocontainer for self-healing organic coating. The corrosion inhibitor of benzotriazole (BTA) was loaded into the porous graphene sheets and then imbedded into epoxy coating to form composite coating. Results showed that the composite coating exhibited excellent self-healing capacity due to the spontaneous release from graphene-based nanocontainer. Through analysis, the effective protective effect of coating contained two aspects. First, the BTA could be released from the nanocontainer to form an adsorption layer on metal surface. Second, the physical barrier of graphene could greatly suppress the permeation of corrosion medium.

中文翻译：

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碳钢上智能石墨烯基自修复涂层的腐蚀防护机制

摘要 合成了含有多孔多面体低聚倍半硅氧烷 (POSS) 骨架的石墨烯片作为自修复有机涂层的纳米容器。将苯并三唑（BTA）缓蚀剂加载到多孔石墨烯片中，然后嵌入环氧树脂涂层中形成复合涂层。结果表明，由于石墨烯基纳米容器的自发释放，复合涂层表现出优异的自愈能力。通过分析，涂层的有效保护作用包括两个方面。首先，BTA 可以从纳米容器中释放出来，在金属表面形成吸附层。其次，石墨烯的物理屏障可以极大地抑制腐蚀介质的渗透。