二氧化硅-聚苯胺-氧化石墨烯复合纳米材料改性水性涂层的制备及防腐蚀性能研究认领

Preparation and Corrosion Resistance of Water-based Coatings Modified by Graphene Oxide-Polyaniline-Silica Nano-composite

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摘要目的将SiO2-PANI-GO三维复合物添加到水性醇酸涂层中,并对改性涂层防腐蚀性能进行研究。方法将纤维状的PANI和球状SiO2与片状的GO进行复合,通过扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)、X射线衍射(XRD)对复合物进行材料表征。将纳米复合物作为填料按照1%的质量比添加到水性涂层中,利用电化学阻抗(EIS)研究涂层改性后的防腐蚀性能。结果SEM图像表明,SiO2-PANI-GO复合物为表面复合了纤维状PANI和球状SiO2的片层状GO。FT-IR及XRD证明了SiO2-PANI-GO复合物的成功制备。EIS结果表明,添加了SiO2-PANI-GO三维复合物改性后,水性醇酸涂层的阻抗提高了2个数量级,其中以SiO2与PANI-GO比例为1:4时效果最好。结论水性醇酸涂层中添加SiO2-PANI-GO/WAV三维复合物,可以增加腐蚀介质侵蚀基底的路径,有效提高涂层的防腐性能。 This work aims to prepare the three-dimensional silica-polyaniline-graphene oxide(SiO2-PANI-GO)composite and add it into water-based alkyd varnish(WAV)to enhance the corrosion protection ability.The SiO2-PANI-GO composite were prepared by a facile chemical method.The composites were characterized by SEM,FT-IR and XRD.The nano composite was added to the water-based coating as filler at the mass ratio of 1%.The anticorrosion performance of WAV and composite introduced WAV were demonstrated by electrochemical impedance spectroscopy measurements(EIS)and polarization tests.The SEM image showed that the silica-polyaniline-graphene oxide composite was a lamellar graphene oxide whose surface was combined with fibrous polyaniline and spherical silica;the results of FT-IR and XRD showed that the silica-polyaniline-graphene oxide was successfully synthesized;the EIS results showed that the anti-corrosion resistance of the modified coating was increased by 2 orders.The best effect was obtained when the ratio of SiO2 to PANI-GO was 1:4.By adding silica-polyaniline-graphene oxide three-dimensional composite into water-based alkyd varnish,the distance and path of the corrosive medium to metal substrate can be increased,so the anti-corrosion resistance of the coating can be effectively improved.

作者杨凝樊伟杰李伟华 YANG Ning;FAN Wei-jie;LI Wei-hua(Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Science,Beijing,100049,China;Qingdao Campus of Naval Aviation University,Qingdao 266000,China;Sun Yat-sen University,Zhuhai 519082,China)

机构地区中国科学院海洋研究所中国科学院大学海军航空大学青岛校区中山大学

出处《装备环境工程》 CAS 2020年第4期105-113,共9页 Equipment Environmental Engineering

基金国家自然科学基金项目(51401185) 国家杰出青年科学基金(51525903)。

关键词氧化石墨烯聚苯胺二氧化硅水性涂层改性阻抗 graphene oxide polyaniline silicon dioxide water-based coating modified corrosion resistance

分类号 TG174.4 [金属学及工艺—金属表面处理][金属学及工艺—金属学]