Double-layer structure superhydrophobic coatings based on silica-modified graphene oxide: Robust stability, weather resistance, and anti-corrosion

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-09-18 DOI:10.1016/j.porgcoat.2025.109668

Shaoheng Yang , Haohao Hu , Zhengbang Tong , Haojun Lin , Zhuangzhuang Chu , Yang Hu , Zhuohong Yang

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引用次数: 0

Abstract

The polymer coatings prepared with bisphenol A-type vinyl ester resin (VER) have gained wide attention for protecting metal substrates from corrosive media. However, it is a clear challenge to realize superhydrophobic performance, mechanical stability, weather resistance and lasting-long anti-corrosion performances at the same time in a VER polymer coating. In this work, we have successfully prepared the double-layer superhydrophobic (PF@GO-SiO₂/VER) composite coating film with the imitated lotus-leaf-like surface structures. And the primer consists of silica nanoparticles-modified graphene oxide (GO-SiO₂) and VER, and the topcoat is comprised by perfluorosilane coupling agent, GO-SiO₂ and epoxy resin. By optimizing the pre-cured temperature of the primer layer, the oxygen inhibition effect of the coating is achieved to enhance the adhesion of the hydrophobic topcoat layer. The PF@GO-SiO₂/VER coating exhibited superhydrophobic properties with the water contact angle of 155.9° and sliding angle of 1.7°. In addition, the results of scratch damage, tape peeling, sand impact, outdoor aging resistance, UV damage, and acid-alkali resistance tests display that the PF@GO-SiO₂/VER coating owns the favorite mechanical and chemical stability. Furthermore, the results of electrolytic cell damage and long-term electrochemical impedance assays show that after soaking in 3.5 wt% NaCl solution for 80 days, the PF@GO-SiO₂/VER coating displayed excellent anti-corrosion performance. In summary, due to its excellent hydrophobicity, mechanical stability, weather resistance, and anti-corrosion performance, this superhydrophobic coating research demonstrates the potential of long-lasting protection in marine environments.

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基于二氧化硅改性氧化石墨烯的双层结构超疏水涂层：稳定性强，耐候性好，耐腐蚀

以双酚a型乙烯酯树脂（VER）为基材制备的聚合物涂料在保护金属基体免受腐蚀介质的腐蚀方面受到了广泛的关注。然而，在VER聚合物涂层中同时实现超疏水性能、机械稳定性、耐候性和持久防腐性能是一个明显的挑战。在这项工作中，我们成功制备了具有仿荷叶状表面结构的双层超疏水（PF@GO-SiO2/VER）复合涂层。底漆由纳米二氧化硅改性氧化石墨烯（GO-SiO2）和VER组成，面漆由全氟硅烷偶联剂、GO-SiO2和环氧树脂组成。通过优化底漆层的预固化温度，达到涂层的阻氧效果，增强疏水面漆层的附着力。PF@GO-SiO2/VER涂层具有超疏水性，水接触角为155.9°，滑动角为1.7°。此外，刮擦损伤、胶带剥落、砂石冲击、室外老化、紫外线损伤、耐酸碱性等测试结果表明，PF@GO-SiO2/VER涂层具有良好的机械和化学稳定性。此外，电解电池损伤和长期电化学阻抗分析结果表明，在3.5 wt% NaCl溶液中浸泡80天后，PF@GO-SiO2/VER涂层表现出优异的防腐性能。综上所述，由于其优异的疏水性、机械稳定性、耐候性和防腐性能，这种超疏水涂层的研究显示了在海洋环境中持久保护的潜力。

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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.