摘要
为了研究氧化石墨烯/三聚氰胺磷酸酯水性复合涂层在海洋环境下的耐蚀性能,利用三聚氰胺磷酸酯对氧化石墨烯进行共价功能化改性,将改性后氧化石墨烯加至水性聚氨酯中,制备功能化氧化石墨烯水性复合涂层.通过傅里叶变换红外光谱、扫描电镜对比分析其结构和微观形貌,并进行耐蚀性盐雾试验、耐蚀性极化曲线测试和附着强度测试.结果表明:当复合物中氧化石墨烯与三聚氰胺磷酸酯的质量比为1∶3,改性后氧化石墨烯的添加量为0.8g时,复合材料涂层的耐腐蚀效率为99.78%.同时,涂层的附着力为4.09MPa,经过168h盐雾试验后附着力损失率为49%.涂层的硬度为5H.接触角测试结果表明,涂层加入改性氧化石墨烯后其接触角由77.3°±1.0°上升到99.8°±0.6°.氧化石墨烯/三聚氰胺磷酸酯水性涂层具有良好的耐蚀性能,其耐蚀性能优于单纯三聚氰胺磷酸酯涂层和氧化石墨烯涂层.
In order to study the corrosion resistance of graphene oxide/melamine phosphate waterborne composite coatings in marine environ ments,melamine phosphate was used to covalently functionalize graphene oxide,and the modified graphene oxide was added to waterborne pol yurethane to prepare waterborne composite coatings of functionalized graphene oxide.The structure and microstructure were comparatively ana lyzed via Fourier transform infrared spectroscopy(FTIR)and scanning electron microscopy(SEM).Corrosion resistance salt spray tests,po larization curve measurements and adhesion strength tests were conducted.Results showed that when the mass ratio of graphene oxide to mela mine phosphate in the composite was 1:3 and the addition amount of modified graphene oxide was O.8 g,the corrosion protection efficiency of the composite coating reached 99.78%.Meanwhile,the coating exhibited an adhesion strength of 4.09 MPa,with a 49%adhesion loss rate af ter 168 h of salt spray test.The coating's hardness was 5H.Contact angle measurements revealed that the addition of modified graphene oxide increased the coating's contact angle from 77.3°±1.0°to 99.8°±0.6°.Overall,the graphene oxide/melamine phosphate waterborne coating exhibited excellent corrosion resistance,which was better than both pure melamine phosphate coatings and graphene oxide coatings.
作者
赵波
冯含宇
舒锡娜
昝陆军
陶海华
邱会东
ZHAO Bo;FENG Hanyu;SHU Xina;ZAN Lujun;TAO Haihua;QIU Huidong(Technical Center for Industrial Products and Raw Materials Inspection and Testing of Shanghai Customs District,Shanghai 200002,China;College of Environmental and Chemical Engineering,Chongqing Three Gorges University,Chongqing 404001,China;Xi’an Water Bureau,Xi’an 710007,China;School of Chemistry and Chemical Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)
出处
《材料保护》
2025年第8期63-68,共6页
Materials Protection
基金
重庆市教育委员会科学技术研究项目(KJQN202101549)。
关键词
氧化石墨烯
三聚氰胺磷酸酯
水性聚氨酯
防腐性能
graphene oxide
melamine phosphate
waterborne polyurethane
corrosion resistance
