具有自修复性能的ZnO/rGO/PANI/EP复合涂层的构建

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-04-16 DOI:10.1016/j.porgcoat.2025.109307

Jinlai Yang , Ruiqi Xu , Hongzhi Cui, Yuhao Zhang, Xiaohua Chen, Jun Zhao, Lin Dai

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引用次数: 0

摘要

本研究设计并构建了一种新型的ZnO/rGO/PANI三元纳米填料复合涂层，以提高金属基体的防腐性能。通过傅里叶变换红外光谱、x射线衍射和拉曼光谱对复合材料进行了表征。复合涂层的断裂面具有较好的致密性，表明纳米填料对纯环氧涂层的孔隙具有良好的修复效果。此外，通过附着力测试和电化学阻抗谱（EIS）技术表征了ZnO/rGO/PANI/EP涂层的力学性能和防腐性能。实验结果表明，ZnO/rGO/PANI/EP涂层的结合强度最高，为9.21 MPa，比纯环氧涂层的结合强度提高约233%。此外，与其他涂层相比，它表现出最高的低频阻抗|Z|0.01Hz，在浸泡30天后达到2.377 × 1011 Ω•cm2，比纯环氧涂层大约三个数量级。这种增强的性能归因于层状纳米填料的协同“迷宫效应”和氧化锌和聚苯胺的“钝化效应”。此外，对ZnO/rGO/PANI复合涂层进行了EIS和扫描开尔文探针（SKP）测试。结果表明，该复合涂层还具有很大的抑制腐蚀潜力，并能获得特殊的自愈效果，为提高金属材料优异的长期耐蚀性提供了可能的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Construction of self-healing ZnO/rGO/PANI/EP composite coatings with enhanced mechanical performance for corrosion protection

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Construction of self-healing ZnO/rGO/PANI/EP composite coatings with enhanced mechanical performance for corrosion protection

In this study, a novel composite coating with ZnO/rGO/PANI ternary nanofillers is designed and constructed, to enhance the anticorrosive property of metal substrate. In this way, the composites are characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and Raman. The fracture surface of the composite coating exhibits great compactness, demonstrating the nanofillers can achieve excellent repair effects on the pores of pure epoxy coatings. Furthermore, the mechanical and anticorrosion properties of the ZnO/rGO/PANI/EP coatings are characterized by the adhesion strength test and Electrochemical Impedance Spectroscopy (EIS) technique. Experimental results show that the ZnO/rGO/PANI/EP coating exhibits the highest adhesion strength at 9.21 MPa, which is approximately 233 % greater than that of the pure epoxy coating. Additionally, it demonstrates the highest low-frequency impedance |Z|_0.01Hz compared to other coatings, reaching 2.377 × 10¹¹ Ω•cm² after 30 days of immersion, which is about three orders of magnitude larger than the pure epoxy coating. This enhanced performance is attributed to the synergistic “labyrinth effect” of the layered nanofillers and the “passivation effect” of ZnO and PANI. In addition, the EIS and Scanning Kelvin Probe (SKP) tests are performed on the ZnO/rGO/PANI composite coating with a scratch. The results show the composite coating also had great potential to inhibit corrosion and can obtain a particular self-healing effect, which provides a possible way to improve the excellent and long-term corrosion resistance for metal materials.

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.