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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)
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
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