一种钼酸锌/氧化石墨烯纳米复合防锈涂料制备及电化学性能探究  

Preparation and Properties of Coatings Based on ZnMoO_(4)/GO Composites

作　　者：徐杰[1] Xu Jie(Fudan University,Shanghai 200433,China)

机构地区：[1]复旦大学,上海200433

出　　处：《涂层与防护》2023年第6期1-6,7,8,22,共9页Coating and Protection

摘　　要：通过原位合成技术制备了钼酸锌(ZnMoO_(4))/氧化石墨烯(GO)纳米复合材料,该复合材料在防止金属腐蚀方面有着良好的协同作用。通过FESEM、TEM、FTIR、XRD、XPS、TGA对复合材料的结构及组成进行表征。利用GO带负电荷的特性,吸附Zn^(2+)于GO表面,成为ZnMoO_(4)的生长位点。通过TEM可以看出,GO表面的钼酸锌颗粒粒径约为50~200 nm。在防腐性能测试中,添加ZnMoO_(4)/GO复合材料使得水性环氧涂层的腐蚀电流密度由5.81×10^(-7)A/cm^(2)降低为6.617×10^(-8)A/cm^(2);涂层的最低腐蚀速率可达到0.0021 mm/a,明显优于单独的GO与ZnMoO_(4)涂层。此外,还初步探讨了ZnMoO_(4)/GO/epoxy涂层的防腐机理。In this study,ZnMoO_(4)/GO composites were synthesized using GO as a carrier via simple electrostatic self-assembly to grow ZnMoO_(4)in situ on the GO surface.The morphology and structure of the products were analyzed by SEM,TEM,XRD,FTIR,Raman,XPS and TGA analyses.The degree of corrosion of the coatings containing different composite materials at varying times was analyzed by the electrochemical impedance spectroscopy(EIS),indicating the significant improvement in the corrosion resistance of waterborne epoxy coatings due to the addition of the ZnMoO_(4)/GO composite material.Compared to the single coating,the composite material showed obvious advantages in corrosion resistance primarily due to the peel of the lamellar structure and the synergistic effect of the two materials on corrosion resistance.Furthermore,the anti-corrosion mechanism of the ZnMoO_(4)/GO/Epoxy coating was discussed.

关 键 词：ZnMoO_(4)/GO 水性环氧树脂 金属防腐 自组装 

分 类 号：TQ630.7[化学工程—精细化工]