功能化石墨烯掺杂环氧树脂船舶防腐涂料的制备及其性能的研究

Research on the Preparation and Properties of Marine Anti-corrosion Coating of Epoxy Resin doped with Functionalized Graphene

采用改进的Hummers法制备了氧化石墨烯(GO),用1-萘磺酸钠(NA)和水合肼对GO进行功能化改性和化学还原,制得功能化石墨烯(NA-r GO),采用溶液共混法制备了NA-r GO掺杂环氧树脂涂料,用扫描电子显微镜观测了NA-r GO和涂料的形貌,研究了涂料的防腐性能,并初步探讨了NA-r GO在涂料中的耐腐蚀机理。结果表明,NA-r GO呈层片状结构,表面比较平整,在涂料中分散比较均匀;当NA-r GO掺杂量为1.0%~2.5%时,涂料涂层厚度保持在95±5μm,当NA-r GO掺杂量为1.5%~2.0%时,涂层硬度可达3H,当NA-r GO掺杂量为1.5%时,涂层自腐蚀电位为-410m V,自腐蚀电流密度为0.049μA/cm2;NA-r GO的掺入在初期会引起加速腐蚀,而涂料在后期则表现出良好的耐腐蚀性能。

The graphene oxide（GO）was prepared by modified Hummers method, then the GO was functionalized by 1-naphthalene sodium sul-fonate, and reduced by hydrazine hydrate in order to get functionalized graphene（NA-r GO）. The coating of epoxy resin doped with NA-r GO was prepared through solution blend process. The morphology of the NA-r GO and coating was observed through SEM, the anti-corrosion property of the coat-ing was researched, and the anti-corrosion mechanism of the NA-r GO was discussed. The results showed that the structure of the NA-r GO was lamel-lar flake and smooth, the NA-r GO was dispersed homogeneously in the coating. The thickness, hardness, corrosion potential and corrosion current density of the coating was 95±5μm, 3 H,-410 m V and 0.049μA/cm2 when the content of NA-r GO was 1.0%～2.5%, 1.5%～2.0% and 1.5% respective-ly. The accelerated corrosion was caused during the initial stage of doping; however the coating exhibited good performance of corrosion resistance during the later stage.