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首页> 外文期刊>RSC Advances >Performance evaluation of mercapto functional hybrid silica sol–gel coating and its synergistic effect with f-GNs for corrosion protection of copper surface
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Performance evaluation of mercapto functional hybrid silica sol–gel coating and its synergistic effect with f-GNs for corrosion protection of copper surface

机译：巯基功能杂化硅溶胶-凝胶涂料的性能评估及其与f-GNs协同作用对铜表面的腐蚀防护

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A nanocomposite coating comprising mercapto functional hybrid silica sol–gel coating and functionalized graphene nanoplates nanocomposite coatings with advanced anticorrosive properties was prepared by a sol–gel method. In this study, graphene oxide (GO) nanoplates were silanized using 3-aminopropyltriethoxysilane (APTES) to obtain functional graphene nanoplates (f-GNs). The f-GNs were characterized by FTIR, XRD, XPS, TEM, AFM and TGA techniques. The functionalized graphene nanoplates were chemically bonded to a sol–gel matrix and showed good dispersion in the sol. Then, silica hybrid sol–gel nanocomposites with raw GO and different amounts of f-GNs were applied on the copper surface. Uniform, defect-free and adherent sol–gel films were obtained. Various corresponding methods were used to investigate the nanocomposite coating's properties. The corrosion resistance of copper significantly improved after being coated with mercapto functional hybrid silica sol–gel. The addition of f-GNs to the mercapto functional silica sol–gel coatings further improved the corrosion resistance due to a synergistic effect. Moreover, with an increase in the amount of f-GNs in the nanocomposite coating, the nanocomposite showed improved corrosion resistance. The nanocomposite containing 0.1 wt% f-GNs can efficiently protect the copper substrate from corrosion. This improvement was primarily attributed to the homogeneous dispersion of the f-GNs in the silica gel matrix and their effective barrier against corrosive molecules and ions. However, adding raw GO or excess f-GNs to the silica hybrid sol–gel coating had a negative effect on the corrosion resistance.
机译：通过溶胶-凝胶法制备了具有巯基功能杂化硅溶胶-凝胶涂层和功能化石墨烯纳米板的纳米复合涂层，具有先进的防腐性能。在这项研究中，使用3-氨丙基三乙氧基硅烷（APTES）将氧化石墨烯（GO）纳米板硅烷化以获得功能性石墨烯纳米板（f-GNs）。 f-GNs用FTIR，XRD，XPS，TEM，AFM和TGA技术表征。功能化的石墨烯纳米板化学键合到溶胶-凝胶基质上，并在溶胶中表现出良好的分散性。然后，将具有原始GO和不同量的f-GNs的二氧化硅杂化溶胶-凝胶纳米复合材料应用于铜表面。获得了均匀，无缺陷和粘附的溶胶-凝胶薄膜。各种相应的方法被用来研究纳米复合涂层的性能。涂有巯基功能杂化硅溶胶-凝胶后，铜的耐蚀性显着提高。在巯基功能二氧化硅溶胶-凝胶涂料中添加f-GNs具有协同作用，从而进一步提高了耐腐蚀性。而且，随着纳米复合材料涂层中f-GN的量增加，纳米复合材料显示出改善的耐腐蚀性。包含0.1 wt％f-GNs的纳米复合材料可以有效地保护铜基板免受腐蚀。这种改善主要归因于f-GNs在硅胶基质中的均匀分散以及它们对腐蚀性分子和离子的有效阻隔作用。但是，在二氧化硅杂化溶胶-凝胶涂料中添加原始的GO或过量的f-GNs会对耐腐蚀性产生负面影响。

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