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

作　　者：Jiahong Wei Ting Shen Wenkai Cao Long Jiang Yu He Weihua Li 

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

出　　处：《Journal of Materials Science & Technology》2024年第30期227-237,共11页材料科学技术(英文版)

基　　金：the financial support through the National Natural Science Foundation of China(No.52271355);the Henan Provincial Science and Technology Research Joint Fund-Young Scientist Project(No.225200810108);the Basic Scientific Research Fund Project of Henan Academy of Sciences(No.230618023);the Research Startup Fund of Henan Academy of Sciences(Nos.231818027,232018001);the High-level Achievement Award and Cultivation Project of Henan Academy of Sciences(No.242218021);the Zhuhai City Industry-University-Research Cooperation Project(No.ZH22017001210148PWC).

摘　　要：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.

关 键 词：Confined solid-liquid transition Photothermal effect Colorability SELF-REPAIRING Anti-corrosion coating 

分 类 号：TG1[金属学及工艺—金属学]