石墨烯/含氟聚丙烯酸酯复合材料涂层的制备及其防腐蚀性能  

On preparation and corrosion resistance test for graphene/fluorinated polyacrylate polymer composite coatings

作　　者：刘创华 胡青青 梁晓蕾 米欣 周强 朱伟东 肖强 LIU Chuanghua;HU Qingqing;LIANG Xiaolei;MI Xin;ZHOU Qiang;ZHU Weidong;XIAO Qiang(Institute of Advanced Fluorine-Containing Materials,Zhejiang Normal University,Jinhua 321004,China;Beijing Thinvec Company Limited,Beijing 100176,China;Juhua Group Corporation,Quzhou 324004,China)

机构地区：[1]浙江师范大学含氟新材料研究所,浙江金华321004 [2]北京信为兢创科技有限公司,北京100176 [3]巨化集团有限公司,浙江衢州324004

出　　处：《浙江师范大学学报（自然科学版）》2021年第3期278-285,共8页Journal of Zhejiang Normal University:Natural Sciences

基　　金：国家自然科学基金资助项目(21471131);北京信为兢创科技有限公司横向课题项目(2019330701000290)。

摘　　要：为提高含氟聚丙烯酸酯(PFHI)涂层的防腐蚀性能,通过在PFHI溶液中添加石墨烯纳米片(GN),经滴涂并固化后得到了厚度约为180 nm的GN/PFHI复合材料涂层.考察了GN添加量对复合材料涂层表面性质和防腐蚀性能的影响.利用Tafel极化曲线和电化学交流阻抗(EIS)研究了复合材料涂层在ω(NaCl)=3.5%溶液中的电化学防腐蚀行为,并测试了复合材料涂层在人工汗液中的抗化学腐蚀性能.运用X光电子能谱(XPS)、拉曼光谱(Raman)、SEM、光学接触角(OCA)等手段对复合材料涂层进行表征.结果表明:剥离的GN可较好地分散在PFHI涂层中,少量GN的添加可大幅提高PFHI涂层的防腐蚀性能;m(GN)∶m(PFHI)为0.002∶1的复合材料涂层防腐蚀性能最好,电化学腐蚀防护效率达到99.90%.GN均匀地分散在PFHI中,阻隔了涂层中可能出现的腐蚀通道,提高了防腐蚀性能.石墨烯/含氟聚丙烯酸酯复合材料涂层的制备为开发高防腐蚀性能涂层提供了新思路.In order to improve the corrosion resistance of fluorinated polyacrylate polymer(PFHI)coatings,graphene nanosheet(GN)/(PFHI)composite coatings with thickness of 180 nm were prepared by incorporating graphene nanosheets(GN)into PFHI solution followed by dip-coating and thermal curing.The effect of the amount of GN on the surface properties and corrosion resistance of the composite coatings were investigated.The corrosion electrochemical behaviors of the GN/PFHI composite coatings inω(NaCl)=3.5%solution were investigated by Tafel curves and electrochemical impedance spectroscopy(EIS).The chemical corrosion resistance of the composite coatings was tested by soaping the coated carbon steel species in an artificial sweat.Various techniques such as X-ray photoelectron spectroscopy(XPS),Raman spectroscopy,SEM,optical contact angle(OCA)were used to characterize the composite coatings.The results showed that the exfoliated GN could be well dispersed in the PFHI coatings and a small amount addition of GN could greatly improve the corrosion resistance of the PFHI coatings.The GN/PFHI with GN to PFHI of 0.002∶1 in mass ratio exhibited the best electrochemical corrosion resistance performance and achieved a protection efficiency of 99.90%.Graphene nanosheets were well dispersed in PFHI,cut off the possible corrosion tunnels and thus improved the corrosion resistance.The preparation of GN/PFHI composite coatings provided a new insight for the development of coatings with high corrosion resistance.

关 键 词：含氟聚丙烯酸酯 石墨烯 复合材料涂层 表面润湿性 防腐蚀 

分 类 号：TB332[一般工业技术—材料科学与工程]