基于聚乙二醇-没食子酸配合物功能化二维沸石咪唑酸骨架纳米片的环氧复合防腐涂料的研制

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-08-27 DOI:10.1016/j.porgcoat.2025.109618

Chenyang Zhao , Chen Wang , Yue Li , Wenlin Yuan , Yi Huang , Di Cheng , Tao Shen , Ji Zhang , Jie Liu , Libei Jiang , Chao Yang , Qianhong Shen , Hui Yang

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引用次数: 0

摘要

二维金属有机框架是近年来提高聚合物涂层防腐性能的一种很有前途的材料。在本研究中，将聚乙二醇没食子酸（PEG-GA）复配壳修饰咪唑酸分子筛骨架纳米片，合成ZIF-ZG@PEG-GA纳米填料，并将其掺入水性环氧树脂基体中。动电位极化分析表明，在3.5 wt% NaCl溶液中加入ZIF-ZG@PEG-GA可使腐蚀电流密度从5.528×10−6 a /cm2降低到1.892 ×10−6 a /cm2。电化学阻抗谱（EIS）分析表明，浸泡42 d后，ZGPG/EP表现出较好的保护性能，|Z|f=0.01Hz (1.87 × 109 Ω·cm2), Rcoat (4.27 × 108 Ω·cm2), Rct （1.43 × 109 Ω·cm2）最高。此外，划伤涂层的EIS分析表明ZIF-ZG@PEG-GA有效地阻止了腐蚀的扩展，防止了涂层的进一步降解。增强的防腐性能归因于通过增加腐蚀物质的扩散阻力的被动保护和通过从PEG-GA络合物中释放没食子酸的主动保护。

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Developing anticorrosion epoxy composite coating based on PEG-gallic acid complex functionalized two-dimensional zeolitic imidazolate framework nanosheets

Two-dimensional Metal-organic frameworks have recently emerged as promising materials for enhancing the anticorrosion protection performance of polymeric coatings. In this study, ZIF-ZG@PEG-GA nanofiller was synthesized by modifying zeolitic imidazolate framework nanosheets with a polyethylene glycol-gallic acid (PEG-GA) complex shell, and subsequently incorporated into waterborne epoxy matrix. Potentiodynamic polarization analysis revealed that the addition of ZIF-ZG@PEG-GA to a 3.5 wt% NaCl solution reduced the corrosion current density from 5.528×10⁻⁶ A/cm² to 1.892 × 10⁻⁶ A/cm². Electrochemical impedance spectroscopy (EIS) analysis revealed that ZGPG/EP exhibited superior protective performance after 42 d of immersion, with the highest |Z|_f=0.01Hz (1.87 × 10⁹ Ω·cm²), R_coat (4.27 × 10⁸ Ω·cm²), and R_ct (1.43 × 10⁹ Ω·cm²). Furthermore, EIS analysis of scratched coatings demonstrated that ZIF-ZG@PEG-GA effectively impeded corrosion propagation and prevented further coating degradation. The enhanced anticorrosion performance is attributed to the passive protection by increasing the diffusion resistance of corrosive species, and the active protection through the release of gallic acid from the PEG-GA complex.

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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.