Inhibition of Defect-Induced Ice Nucleation, Propagation, and Adhesion by Bioinspired Self-Healing Anti-Icing Coatings
作者机构：Department of Biochemical EngineeringFrontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(MOE)School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Binzhou Institute of TechnologyWeiqiao-UCAS Science and Technology ParkBinzhou CityShandong Province 256606China
出 版 物：《Research》 (研究（英文）)
年 卷 期：2024年第2023卷第1期
页 面：237-246页
核心收录：
学科分类：0710[理学-生物学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0706[理学-大气科学] 0703[理学-化学] 0702[理学-物理学]
基 金：the National Key Research and Development Program of China(2022YFC2104800 and 2021YFC2100800) the National Natural Science Foundation of China(22078238,21908160,and 21961132005).
摘 要：Anti-icing coatings on outdoor infrastructures inevitably suffer from mechanical injuries in numerous icing scenarios such as hailstorms,sandstorms,impacts of foreign objects,and icing–deicing cycles.Herein,the mechanisms of surface-defect-induced icing are clarified.At the defects,water molecules exhibit stronger adsorption and the heat transfer rate increases,accelerating the condensation of water vapor as well as ice nucleation and propagation.Moreover,the ice–defect interlocking structure increases the ice adhesion strength.Thus,a self-healing(at−20℃)antifreeze-protein(AFP)-inspired anti-icing coating is developed.The coating is based on a design that mimics the ice-binding and non-ice-binding sites in AFPs.It enables the coating to markedly inhibit ice nucleation(nucleation temperature−29.4℃),prevent ice propagation(propagation rate0.00048 cm^(2)/s),and reduce ice adhesion on the surface(adhesion strength38.9 kPa).More importantly,the coating can also autonomously self-heal at−20℃,as a result of multiple dynamic bonds in its structure,to inhibit defect-induced icing processes.The healed coating sustains high anti-icing and deicing performance even under various extreme conditions.This work reveals the in-depth mechanism of defect-induced ice formation as well as adhesion,and proposes a self-healing anti-icing coating for outdoor infrastructures.
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