氨基化GO/磺化聚苯胺改性水性环氧防腐涂料的制备与性能

以氯磺酸、苯胺和过硫酸铵为主要原料合成磺化聚苯胺（SPANI），利用聚乙烯亚胺（PEI）还原GO，合成PG复合材料。利用GO上活性位点，将SPANI与PG结合，制备了SPG复合材料。利用SPG与水性环氧树脂共混制备水性环氧防腐涂料。通过FT-IR、XRD对SPG复合材料结构表征，结果表明，PEI上的氨基成功与GO结合，SPANI成功增加了PG的层间距；通过盐雾、电化学等实验对水性环氧涂层的防腐性能进行测定，并分析了涂层的物理性能。结果表明，当添加2wt%SPG时（添加量以环氧树脂和固化剂总质量为基准，下同）的水性环氧防腐涂层具有最优异的耐腐蚀性，腐蚀效率可达到99.19%，与纯EP相比，腐蚀电流密度从1080 nA?cm-2减小至307 nA?cm-2，腐蚀电压从-0.840mV升高至-0.347mV。

Preparation and properties of amino GO/sulfonated polyaniline modified waterborne epoxy anticorrosive coating

Sulfonated polyaniline (Spani) was synthesized from chlorosulfonic acid, aniline and ammonium persulfate. Go was reduced by polyethyleneimine (PEI) to synthesize PG composites. SPG composites were prepared by combining Spani with PG using the active site on go. Waterborne epoxy anticorrosive coatings were prepared by blending SPG with waterborne epoxy resin. The structure of SPG composites was characterized by FT-IR and XRD. The results showed that the amino group on Pei successfully combined with go, and Spani successfully increased the layer spacing of PG; The corrosion resistance of waterborne epoxy coating was measured by salt spray and electrochemical experiments, and the physical properties of the coating were analyzed. The results show that when 2wt% SPG is added (the amount is based on the total mass of epoxy resin and curing agent, the same below), the waterborne epoxy anticorrosive coating has the best corrosion resistance, and the corrosion efficiency can reach 99.19%. Compared with pure EP, the corrosion current density decreases from1080 nA?cm-2 to 307 nA?cm-2, and the corrosion voltage increases from -0.840mV to -0.347mV