Robust multistage thermochromic superhydrophobic coating prepared by a facile one-step spray coating method

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-09-05 DOI:10.1016/j.porgcoat.2025.109625

Xiaohan Wang , Yongyue Peng , Xinyue Wei , Yi Liang , Jian Li , Xiaoting Niu

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引用次数: 0

Abstract

Emerging smart thermochromic coating technologies have demonstrated significant potential in applications such as temperature indication, safety warning, and energy efficiency management. Inspired by the thermoregulation mechanism of chameleon skin, this study presents a reversible thermochromic superhydrophobic coating featuring multilevel temperature responsiveness and multicolor transitions based on ambient temperature. Three types of thermochromic microcapsules (TCMs) were combined with nano-silica (SiO₂) to construct dual-scale particles, which were further modified with long-chain silanes. A fluorine-free, environmentally friendly superhydrophobic coating with a hierarchical micro/nanostructure was subsequently fabricated via a simple one-step spraying method. The coating exhibits a distinct and reversible tricolor transition (“green–yellow–red”) within the temperature range of 15–35 °C, closely aligning with human thermal perception. It demonstrates excellent superhydrophobicity, with a water contact angle (WCA) exceeding 150° and a sliding angle below 3°. Notably, the WCA increases to over 160° after mild sand abrasion. The coating maintains remarkable stability after sandpaper abrasion, mechanical impact, chemical corrosion, and prolonged UV exposure, showcasing exceptional durability. Electrochemical impedance spectroscopy (EIS) further verifies its outstanding barrier performance. Additionally, the coating shows strong liquid repellency against various common liquids (tea, cola, milk, juice), along with excellent self-cleaning capabilities and broad substrate applicability. This innovative, green, and robust thermochromic superhydrophobic coating offers strong potential for practical applications in smart surfaces, thermal warning systems, and multifunctional protective materials.

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采用简单的一步喷涂方法制备了坚固的多级热致变色超疏水涂层

新兴的智能热致变色涂层技术在温度指示、安全警告和能源效率管理等应用中显示出巨大的潜力。受变色龙皮肤热调节机制的启发，本研究提出了一种具有多级温度响应和基于环境温度的多色转换的可逆热致变色超疏水涂层。将三种类型的热致变色微胶囊（TCMs）与纳米二氧化硅（SiO₂）结合，构建双尺度颗粒，并对其进行长链硅烷修饰。随后，通过简单的一步喷涂方法制备了具有分层微/纳米结构的无氟环保超疏水涂层。涂层在15-35°C的温度范围内表现出明显的可逆三色转变（“绿黄红”），与人类的热感知密切相关。它具有优异的超疏水性，水接触角（WCA）超过150°，滑动角小于3°。值得注意的是，轻度砂磨后WCA增加到160°以上。该涂层在经受砂纸磨损、机械冲击、化学腐蚀和长时间紫外线照射后仍能保持卓越的稳定性，具有卓越的耐用性。电化学阻抗谱（EIS）进一步验证了其优异的阻隔性能。此外，该涂层对各种常见液体（茶、可乐、牛奶、果汁）具有很强的拒液性，同时具有优异的自清洁能力和广泛的基材适用性。这种创新的、绿色的、坚固的热致变色超疏水涂层在智能表面、热预警系统和多功能保护材料的实际应用中具有巨大的潜力。

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

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.