苯胺还原诱导的氧化石墨烯/Fe3O4复合材料的防腐蚀性能及机理
Corrosion Resistance and Mechanism of Aniline Reduction-Induced Oxidation Graphene/Fe3O4 Nanocomposites
李红玲 1李紫祎 1杨阳 1张皓杰 1郎五可1
作者信息
摘要
将还原氧化石墨烯(rGO)与Fe3O4复合,以苯胺为还原剂还原制得rGO/Fe3O4二元纳米复合材料.然后苯胺在Fe3O4和rGO表面原位氧化聚合为聚苯胺(PANI),最后用聚苯胺涂覆rGO/Fe3O4复合材料,并以水性环氧树脂(EP)为填料,制备出具有多层结构的rGO/Fe3O4/PANI/EP复合涂层.采用Tafel极化曲线、电化学阻抗谱和中性盐雾试验研究了rGO/Fe3O4/PANI/EP涂层的防腐蚀性能和机理.结果表明:与纯环氧树脂涂层和rGO/Fe3O4/EP涂层相比,rGO/Fe3O4/PANI/EP涂层的耐盐雾腐蚀性能最好,且具有更好的分散性和稳定性.石墨烯的高效阻隔性能和聚苯胺的电化学智能钝化构成了三元纳米复合材料的防腐蚀机理.
Abstract
RGO/Fe3O4 binary nanocomposites were prepared by combining restore oxidation graphene(rGO)with Fe3O4 and reducing it with aniline as a reducing agent.Then aniline underwent in-situ oxidation polymerization on the surfaces of Fe3O4 and rGO to form polyaniline(PANI).Finally,the rGO/Fe3O4 composite material was coated with polyaniline,and a multi-layered rGO/Fe3O4/PANI/EP composite coating was prepared using waterborne epoxy resin(EP)as a filler.The corrosion resistance and mechanism of rGO/Fe3O4/PANI/EP coatings were studied using Tafel polarization curves,electrochemical impedance spectroscopy,neutral salt spray testing,and photoelectro spectroscopy.The results showed that the RGO/Fe3O4/PANI/EP coatings had the best salt spray resistance,good dispersion,and stability compared to pure epoxy coatings and rGO/Fe3O4/EP coatings.The anti-corrosion mechanism of the composite material was the high efficiency barrier performance of graphene and the electrochemical intelligent passivation effect of PANI enhanced by the ternary composite material.
关键词
三元纳米复合材料/氧化石墨烯/Fe3O4/聚苯胺/防腐蚀性能及机理Key words
ternary nanocomposites/oxidation graphene/Fe3O4/plyaniline/corrosion resistance and mechanism引用本文复制引用
出版年
2024
NETL
NSTL
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