基于镁合金的智能环氧纳米复合材料的设计，该复合材料将ZIF-8的屏障增强与ph触发的绿色抑制剂释放协同结合

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-07-21 DOI:10.1016/j.porgcoat.2025.109531

Dan Xu , Peichun Tang , Yuejun Ouyang , Hongjie Bi , Gaoyuan Ye , Hongquan Fu , Yao Xiao , Dongmei Pu , Qiwen Yong , Zhi-Hui Xie

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引用次数: 0

摘要

将功能纳米材料掺入有机涂层中，为增强金属的耐腐蚀性提供了有效途径。在这里，我们报道了一种可持续和绿色的isatin - schiff碱抑制剂（PHIO），通过isatin和3,4-二氟苯胺（DFBH）的缩合合成，并将其在ZIF-8中一锅封装以产生PHIO@ZIF-8智能纳米材料。将这些纳米材料分散到环氧基中，在镁合金上制备耐腐蚀的环氧纳米复合材料。通过FTIR、1H NMR和13C NMR验证了PHIO的化学性质，电化学测试和DFT计算验证了其对镁合金的强抑制作用。采用SEM、XRD、FTIR、XPS、TGA和UV-Vis等方法对PHIO@ZIF-8的形貌、结晶度、负载和释放动力学进行了表征。EIS和盐雾测试表明，含有2 wt% PHIO@ZIF-8的涂层在28天后保持5.43 × 107 Ω·cm2的低频阻抗模量，比纯环氧树脂高55倍，具有优异的长期保护效果。这些发现为合成高性能、绿色的镁合金缓蚀剂提供了可持续的策略，并证明了PHIO@ZIF-8纳米材料的环氧树脂的耐腐蚀性显著增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Designing of smart epoxy nanocomposites on Mg alloy that synergistically combine the barrier enhancement of ZIF-8 with pH-triggered release of a green inhibitor

查看原文本刊更多论文

Designing of smart epoxy nanocomposites on Mg alloy that synergistically combine the barrier enhancement of ZIF-8 with pH-triggered release of a green inhibitor

The incorporation of functional nanomaterials into organic coatings offers an effective route to bolster metal corrosion resistance. Here, we report a sustainable and green isatin–Schiff base inhibitor (PHIO), synthesized via condensation of isatin and 3,4-difluorobenzenamine (DFBH), and its one-pot encapsulation within ZIF-8 to yield PHIO@ZIF-8 smart nanomaterials. These nanomaterials were dispersed into an epoxy matrix to fabricate corrosion-resistant epoxy nanocomposites on Mg alloy. The chemical identity of PHIO was confirmed by FTIR, ¹H NMR and ¹³C NMR, while both electrochemical tests and DFT calculations verified its strong inhibitory effect on Mg alloy. The morphology, crystallinity, loading and release kinetics of PHIO@ZIF-8 were characterized by SEM, XRD, FTIR, XPS, TGA and UV–Vis spectroscopy. EIS and salt-spray tests revealed that the coating containing 2 wt% PHIO@ZIF-8 retained a low-frequency impedance modulus of 5.43 × 10⁷ Ω·cm² after 28 days, which was 55-fold higher than pure epoxy, signifying exceptional long-term protection. These findings offer a sustainable strategy for synthesizing high-performance and green inhibitor for Mg alloy, and demonstrate the markedly enhanced the corrosion resistance of the epoxy incorporated with the PHIO@ZIF-8 nanomaterials.

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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.