Colorable photothermal-induced self-repairing anti-corrosion coating based on confined solid-liquid transition

Jiahong Wei ¹Ting Shen ¹Wenkai Cao ²Long Jiang ³Yu He ⁴Weihua Li⁵

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作者信息

1. Henan Academy of Sciences,Zhengzhou 450046,China
2. School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China
3. Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China
4. State Grid Xin Yuan Group Co.,Ltd.Xinanjiang Hydroelectric Power Plant,Jiande 311600,China
5. Henan Academy of Sciences,Zhengzhou 450046,China;North China University of Water Resources and Electric Power,Zhengzhou 450046,China;School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China
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Abstract

Self-repairing coatings hold promise for prolonging the lifespan of steel structures and reducing carbon dioxide emissions from metal corrosion.Reversible chemistry-based intrinsic self-repairing has emerged as a cutting-edge strategy for addressing material damage.However,achieving effective repair at damaged coating interfaces remains challenging due to adhesion limitations between the coating and substrate.In this study,we propose an innovative approach to efficiently repair coating damage using photothermal-induced confined solid-liquid transition.We developed a unique structured coating by incorporating ther-moplastic epoxy resin(EP)into a polyethersulfone(PES)network skeleton through controlled reaction-induced phase separation.Additionally,we synthesized visible-light transmittable copper sulfide(CuS)nanocrystals as photothermal fillers to impart PES/EP-CuS coating with colorability.Upon near-infrared(NIR)laser irradiation,the EP phase undergoes confined solid-liquid transition at the crack site,enabling it to flow through the PES skeleton and seal the crack.This process promotes contact between damaged interfaces and closes the crack through interfacial tension.The PES/EP-CuS coating exhibited exceptional anti-corrosion restoration during service,showcasing its robust self-repairing capability.

Key words

Confined solid-liquid transition/Photothermal effect/Colorability/Self-repairing/Anti-corrosion coating

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基金项目

National Natural Science Foundation of China(52271355)

Henan Provincial Science and Technology Research Joint Fund-Young Scientist Project(225200810108)

Basic Scientific Research Fund Project of Henan Academy of Sciences(230618023)

Research Startup Fund of Henan Academy of Sciences(231818027)

Research Startup Fund of Henan Academy of Sciences(232018001)

Highlevel Achievement Award and Cultivation Project of Henan Academy of Sciences(242218021)

Zhuhai City Industry-University-Research Cooperation Project(ZH22017001210148PWC)

出版年

2024

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

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