Functionalized graphene oxide (GO)/epoxy resin (EP) composite coating has attracted attention due to its advantages of epoxy resin in acid resistance, anticorrosion and having the characteristics of GO such as good chemical stability and strong electrolyte barrier properties. In this study, epoxypropyl functionalized graphene oxide (EFGO) was synthesized with a new strategy by grafting epichlorohydrin (ECH) onto the surface of GO. EFGO was then cross-linked with EP by diethylenetriamine (DETA) to fabricate EFGO/EP anticorrosive coating. The structure and property of EFGO and EFGO/EP were characterized and evaluated by various methods such as FTIR, Raman, XPS, SEM, and EIS. The results showed that the graft amount of epoxypropyl on GO surface could be effectively increased by using KI-KF catalysis system. The increase of the graft amount further improved the compatibility between EFGO and EP. EFGO/EP had a network structure with EFGO as the “central node”. The “central node” locked the movement of EP chain segment, as improving the thermal stability of EFGO/EP. The EFGO/EP coating fabricated by the EFGO, which grafted larger epoxypropyl, had good anticorrosion performance and adhesion with steel plates, showing a good barrier effect on electrolyte migration. The coating resistance reached up 4.88×10 8 Ω cm 2 .

中文翻译：

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环氧丙基官能化氧化石墨烯的制备及其与环氧树脂复合的防腐性能

功能化氧化石墨烯（GO）/环氧树脂（EP）复合涂层因其环氧树脂在耐酸性、耐腐蚀等方面的优势，并具有GO化学稳定性好、电解质阻隔性强等特点而备受关注。在这项研究中，通过将环氧氯丙烷 (ECH) 接枝到 GO 表面，采用新策略合成了环氧丙基官能化氧化石墨烯 (EFGO)。然后通过二亚乙基三胺 (DETA) 将 EFGO 与 EP 交联以制备 EFGO/EP 防腐涂层。EFGO和EFGO/EP的结构和性能通过FTIR、Raman、XPS、SEM和EIS等多种方法进行表征和评估。结果表明，使用KI-KF催化体系可以有效提高GO表面环氧丙基的接枝量。接枝量的增加进一步提高了EFGO与EP的相容性。EFGO/EP 具有以 EFGO 为“中心节点”的网络结构。“中心节点”锁定EP链段的运动，提高EFGO/EP的热稳定性。EFGO 制备的 EFGO/EP 涂层接枝较大的环氧丙基，具有良好的防腐性能和与钢板的附着力，对电解液迁移表现出良好的阻隔作用。涂层电阻达到4.88×10 8 Ω cm 2 。具有良好的防腐性能和与钢板的附着力，对电解液迁移表现出良好的阻隔作用。涂层电阻达到4.88×10 8 Ω cm 2 。具有良好的防腐性能和与钢板的附着力，对电解液迁移表现出良好的阻隔作用。涂层电阻达到4.88×10 8 Ω cm 2 。