芳香族聚氧乙烯醚改性石墨烯对水性环氧涂层防腐性的影响  

Functionalized Graphene with Aromatic Polyoxyethylene Ethers to Enhance Anti-corrosive Performance of Waterborne Epoxy Coatings

作　　者：王睿[1] 易红玲[1] 郑柏存[1] Wang Rui;Yi Hongling;Zheng Baicun(Sports Materials Research Center,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学,体育材料研发中心,上海200237

出　　处：《涂料工业》2023年第2期43-50,共8页Paint & Coatings Industry

摘　　要：采用3种不同结构的芳香族聚氧乙烯醚[β-萘酚聚氧乙烯醚(Lugalvan BNO12)]、三苯乙烯基苯酚聚氧乙烯醚[Trtspe-18(EO=10)和Trtspe-18(EO=20)]对石墨烯进行改性,通过吸附曲线、热重分析(TGA)、紫外-可见光谱、流变性分析了改性石墨烯分散液的稳定性,并考察了Trtspe-18(EO=20)改性石墨烯(TGr)分散液/水性环氧涂层的物理机械性能和防腐性。结果表明:含有4个苯环和更长亲水链的Trtspe-18(EO=20)改性剂在石墨烯表面的吸附量最高,得到的石墨烯分散液分散稳定性最好。TGr添加量为1.0%时,涂层的耐腐蚀性最佳,此时复合涂层自腐蚀电流密度最低为4.34×10^(-8)A/cm^(2),涂层具有较好的物理机械性能,三苯乙烯基苯酚聚氧乙烯醚改性石墨烯提高了水性环氧涂料的耐腐蚀性。The effect of aromatic polyoxyethylene ethers molecular structure(β-naphthol)polyoxyethylene ether(Lugalvan BNO12),tristyryl phenol polyoxyethylene ether(Trtspe-18,EO=10,20)on the dispersion stability of graphene dispersions were studied by adsorption isotherm,thermogravimetric analysis(TGA),UV-VIS and rheology.The results showed that the Trtspe-18(EO=20)containing four benzene rings and a longer polar hydrophilic stable chain owned a faster adsorption rate and the highest adsorption amount on the graphene surface.Thus prepared graphene dispersion liquid had the best dispersion stability.The mechanical properties and corrosion resistance of graphene dispersion Trtspe-18(EO=20)-Gr/waterborne epoxy resin composites coatings with contents were studied.The results showed that when the content of TGr was 1.0 wt%,the composite coating showed good mechanical performance and the best anti-corrosion properties.At this time,the self-corrosion current density of the composite coating was the lowest(4.34×10^(-8)A/cm^(2)).The work showed that aromatic polyoxyethylene ether modified graphene could be used as a functional filler to improve the corrosion resistance of waterborne epoxy coatings.

关 键 词：芳香聚氧乙烯醚 石墨烯 分散稳定性 水性环氧涂层 防腐 

分 类 号：TQ635.2[化学工程—精细化工]