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首页> 外文期刊>Carbon: An International Journal Sponsored by the American Carbon Society >Maleic anhydride-functionalized graphene nanofillers render epoxy coatings highly resistant to corrosion and microbial attack
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Maleic anhydride-functionalized graphene nanofillers render epoxy coatings highly resistant to corrosion and microbial attack

机译：马来酸酐 - 官能化的石墨烯纳米填料使环氧树脂涂层具有高度耐腐蚀和微生物发作的环氧树脂涂层

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Iron-based alloys that are ubiquitously used in industrialized societies are prone to corrosion which results in large maintenance and repair costs. Here we design maleic-anhydride-functionalized graphene nanofillers to enhance corrosion resistance of epoxy coating (MAGE) on mild steel surfaces, with a corrosion protection efficiency of 99.9%. A mechanochemical approach based on Diels-Alder reaction was used to synthesize graphene nanofillers and functionalize them with difunctional bisphenol A/epichlorohydrin epoxy. The MAGE coating increased corrosion resistance of steel by 9-10 orders of magnitude compared to bare metal in both abiotic (3.5% NaCl) and aggressive microbial (sulfate-reducing bacteria, SRB) environments. Compared to unfunctionalized graphene nanoplatelets, the MAGE coating offered four orders of magnitude lower corrosion resistance against planktonic SRB cells, 80% lower against sessile SRB cells, and 19-fold lower against 3.5% NaCl. The unique functional groups in maleic-anhydride-graphene adducts enabled their dispersion in epoxy coating and enhanced its mechanical properties. The high corrosion resistance of MAGE in diverse environments is attributed its outstanding ability to block the intercalation of corrosive species. (C) 2019 Elsevier Ltd. All rights reserved.
机译：在工业化社会中普遍存在的铁基合金易于腐蚀，导致大量的维护和维修费用。在这里，我们设计马来酸酐官能化的石墨烯纳米烯，以提高环氧涂层（MAGE）对温和钢表面的耐腐蚀性，腐蚀保护效率为99.9％。使用基于Diels-Alder反应的机械化学方法合成石墨烯纳米氧化物，用双官能双酚A /表氯醇环氧官能化。与非生物（3.5％NaCl）和腐蚀性微生物（硫酸盐降低的细菌，SRB）环境中的裸金属相比，钢的耐腐蚀性增加了9-10级的耐腐蚀性。与未官能化的石墨烯纳米片相比，法师涂层为腓粥SRB细胞提供了四个级别较低的耐腐蚀性，抗术术SRB细胞80％，较低的3.5％NaCl降低了19倍。马来酸酐 - 石墨烯加合物中的独特官能团使其在环氧涂层中的分散并增强其机械性能。 MAGE在不同环境中的高耐腐蚀性归因于阻断腐蚀性物种插入的突出能力。 （c）2019年elestvier有限公司保留所有权利。

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