Advanced eco-friendly dual-layer coating: Combining superhydrophobicity with smart self-healing for superior metal protection

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED Progress in Organic Coatings Pub Date : 2024-08-31 DOI:10.1016/j.porgcoat.2024.108774

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Abstract

In this study, a double-layer composite coating was developed by integrating a superhydrophobic top layer with a smart self-healing bottom layer. The superhydrophobic top coating demonstrated a high water contact angle of up to 153°, showcasing excellent mechanical properties, corrosion resistance, self-cleaning ability, and resistance to fouling, ice formation, and scaling. Notably, the anti-scaling property of the coating remained above 80 % after 36 h of immersion. The bottom layer, composed of waterborne epoxy resin and pH-responsive smart fillers, provided enhanced corrosion resistance and self-repairing capabilities while maintaining environmental friendliness. Experimental results indicated that the impedance value of the composite coating could reach 10¹⁰ Ω·cm² at 0.01 Hz, significantly surpassing the corrosion resistance of traditional waterborne epoxy resin coatings. Additionally, the protective effect of the superhydrophobic top layer was evident even after the coating was damaged, suggesting a novel approach for employing superhydrophobic coatings in metal corrosion protection.

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先进的环保双层涂层：兼具超疏水和智能自修复功能，为金属提供卓越保护

在这项研究中，通过整合超疏水表层和智能自修复底层，开发出了一种双层复合涂层。超疏水表层的水接触角高达 153°，具有优异的机械性能、耐腐蚀性、自清洁能力以及抗结垢、抗结冰和抗结垢性能。值得注意的是，涂层的抗结垢性能在浸泡 36 小时后仍保持在 80% 以上。底层由水性环氧树脂和 pH 值响应型智能填料组成，在保持环境友好性的同时增强了耐腐蚀性和自修复能力。实验结果表明，复合涂层在 0.01 Hz 时的阻抗值可达到 1010 Ω-cm2，大大超过了传统水性环氧树脂涂层的耐腐蚀性能。此外，即使在涂层受损后，超疏水表层的保护效果也很明显，这为在金属防腐中使用超疏水涂层提供了一种新方法。

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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.