Facile and effective construction of superhydrophobic, multi-functional and durable coatings on steel structure

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2024-09-21 DOI:10.1016/j.compositesb.2024.111850

Zhenlin Tang , Meihuan Gao , Haidi Li , Ziyang Zhang , Xinying Su , Yingge Li , Zhishuang Han , Xinmeng Lv , Jing He , Zaihang Zheng , Yan Liu

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Abstract

Nowadays, steel is one of the most significant materials in industry and daily life. Unfortunately, the defects of steel structures such as collapse at high temperature, poor corrosion resistance, and bad surface functionality have severely restricted their further application. Applying functional coatings for steel structures is considered the effective strategy for settling theses disadvantages. Inspired by nature, eco-friendly, superhydrophobic, and multifunctional-integrated coatings were fabricated on steel via one-step spraying strategy in this paper. Along with silicon dioxide (SiO₂) nanoparticles and epoxy resin/silicone resin (EP/SR), the coatings are jointly constituted by hydrophobic flame retardants (M-ALHP@ZIF-8) prepared via multi-stage modification. Due to the formation of micro/nano-scaled rough structure with low surface energy, the water contact angle (WCA) and water sliding angle (WSA) of as-prepared coatings can reach 162.4° ± 1.2° and 2.8° ± 0.4°. The water repellency with low water adhesion can endow the surface of steel with excellent self-cleaning, anti-fouling, and long-lasting anti-corrosion ability. Additionally, the superhydrophobic coatings have displayed good mechanical robustness, chemical stability and weather resistance, which can exhibit certain actual values. Accorded with Zn-catalyzed charring effect of flame retardants, as-prepared coatings have possessed outstanding fire protection capacity with the lowest backside temperature of 181 °C after 1 h fire impact tests. Consequently, this work has provided a facile and effective route for synchronously tackling the key challenges of poor fire protection and surface functionality for steel structures, which will be expected to pave the wide pathway for constructing multifunctional coatings in more fields.

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钢结构超疏水、多功能和耐用涂层的便捷有效构建

如今，钢材已成为工业和日常生活中最重要的材料之一。遗憾的是，钢结构的缺陷，如高温下坍塌、耐腐蚀性差、表面功能不良等，严重限制了钢结构的进一步应用。为钢结构喷涂功能性涂料被认为是解决这些缺陷的有效策略。受大自然的启发，本文通过一步喷涂策略在钢结构上制作了环保、超疏水和多功能集成涂层。除二氧化硅（SiO2）纳米颗粒和环氧树脂/硅树脂（EP/SR）外，涂层还与通过多级改性制备的疏水阻燃剂（M-ALHP@ZIF-8）共同构成。由于形成了具有低表面能的微/纳米鳞片状粗糙结构，所制备涂层的水接触角（WCA）和水滑动角（WSA）分别达到了 162.4° ± 1.2° 和 2.8° ± 0.4°。憎水性和低水附着力赋予了钢材表面出色的自清洁、防污和长效防腐能力。此外，超疏水涂层还具有良好的机械坚固性、化学稳定性和耐候性，并能表现出一定的实际价值。在阻燃剂 Zn 催化炭化效应的作用下，制备的涂层具有出色的防火能力，在 1 小时的火灾冲击试验中，涂层背面温度最低达 181 ℃。因此，这项工作为同步解决钢结构防火性能和表面功能性差这一关键难题提供了一条简便而有效的途径，有望为在更多领域构建多功能涂层铺平道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.