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Precise controllable self-healing composite coating towards designated corrosion locations(Chemical Engineering Journal 505 (2025) 159568)
作者:Xue Fu , Pengpeng Lu, Yong Fan , Jianing Xu, Shusheng Zhu, Jie Zhao
關鍵字:Precise self-healing, Accurate locating corrosion sites, Extreme environment tolerance, Nanofiber composite coating, Anticorrosion
論文來源:期刊
發表時間:2025年
Self-healing properties are widely incorporated into anti-corrosion coatings to improve their durability and reliability. Yet, precisely targeting and controlling self-healing actions for designated microdefects and early corrosion pits continue to pose substantial challenges. Herein, a precise controllable self-healing anticorrosion composite coating is realized by combining layer-specific nanofiber membranes and epoxy blockage layer, under stimulation of remote near-infrared (NIR) light. This coating demonstrates highly accurate positioning for corrosion sites, exhibiting conspicuous fluorescence signals by chelating with corrosion-released metal ions. Subsequently, precise regional control of self-healing behaviors in designated locations is achieved within 30 s, with a self-healing anticorrosion efficiency of 96.32 %. It also sustains fast yet precise healing abilities under varied harsh conditions, including underwater, simulated seawater, ultra-low temperatures, and even vacuum environments. The universally precise self-healing tactic makes composite coating extensively available for a range of scenarios and offers a valuable inspiration for developing in-situ self-healing systems with high precision.
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