基于锌-咪唑金属-有机骨架/氧化石墨烯纳米复合材料的智能环氧防腐涂层

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-08-11 DOI:10.1016/j.coco.2025.102556

Danial Hayati, Shahram Ghasemi, Moslem Mansour Lakouraj, Farimah Mousavi

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引用次数: 0

摘要

开发金属基材智能涂层对于推进防腐蚀技术的发展具有越来越重要的意义。本研究的重点是使用由氧化石墨烯（GO）纳米片和浸渍苯并三唑（BTA）抑制剂的多面体沸石咪唑骨架-8 （ZIF-8）组成的纳米复合材料来增强环氧聚合物涂层。利用透射电子显微镜（TEM）、场发射扫描电子显微镜（FE-SEM）和能量色散x射线能谱仪（EDS）对其进行了形态和结构分析。x射线衍射（XRD）图显示了样品的晶体结构和GO/ZIF-8/BTA纳米复合材料的合理合成路线。傅里叶变换红外（FTIR）、拉曼（Raman）和x射线光电子（XPS）光谱鉴定出纳米复合材料中各种含氧和含氮官能团可能成为金属表面的键合位点，并增强了薄膜的防腐能力。利用密度泛函理论（DFT）进一步证实了这一说法。N2吸附/解吸结果表明，ZIF-8样品的优越比表面积为1761 m2 g−1，提供了大量可访问的微孔来存储BTA分子。将不同的环氧树脂（EP）薄膜样品装入待研究材料并涂覆在钢（ST）叶片上。对其进行了FE-SEM、EDS、元素映射、接触角测量、盐雾测试、Tafel极化和电化学阻抗谱（EIS）等一系列实验。优化后的ST/GO/ZIF-8/BTA/EP样品的开路电位为−280 mV，腐蚀电流密度为0.02 μA cm - 2，电荷转移电阻为54.50 kΩ cm2，比ST/EP样品提高了99%。研究表明，GO/ZIF-8/BTA/EP膜具有可靠的长期防腐性能，可保护金属表面。

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A smart epoxy coating based on Zn-imidazole metal-organic framework/graphene oxide nanocomposite for corrosion protection

Developing smart coatings for metal substrates is increasingly significant for advancing corrosion protection technologies. This study focuses on reinforcing epoxy polymer coating using a nanocomposite consisting of graphene oxide (GO) nanosheets and polyhedron zeolitic imidazolate framework-8 (ZIF-8) impregnated with benzotriazole (BTA) inhibitor. Morphological and structural analyses were conducted using transmission electron microscopy (TEM) and field-emission scanning electron microscopy (FE-SEM) coupled with energy dispersive X-ray spectroscopy (EDS). X-ray diffraction (XRD) patterns have demonstrated the crystalline structure of the samples and the reasonable synthesis route for the GO/ZIF-8/BTA nanocomposite. Fourier-transform infrared (FTIR), Raman, and X-ray photoelectron (XPS) spectroscopies have identified various oxygen- and nitrogen-containing functional groups in the nanocomposite as possible bonding sites to metal surfaces and enhance the corrosion protection of the film. The claim was further confirmed using density functional theory (DFT). The N₂ adsorption/desorption results declared a superior specific surface area of 1761 m² g⁻¹ for the ZIF-8 sample, providing a high amount of accessible micropores to store BTA molecules. Diverse samples of epoxy (EP) films were loaded with under-study materials and coated on steel (ST) blades. They were subjected to a series of experiments, including FE-SEM, EDS, elemental mapping, contact angle measurement, salt spray testing, Tafel polarization, and electrochemical impedance spectroscopy (EIS). The optimized ST/GO/ZIF-8/BTA/EP sample exhibited an open-circuit potential of −280 mV, a corrosion current density of 0.02 μA cm⁻², and a charge-transfer resistance of 54.50 kΩ cm², indicating 99 % improvement over ST/EP. The study revealed reliable long-term anticorrosion performance of GO/ZIF-8/BTA/EP film to protect metal surfaces.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.