首页|Inhibition of Defect-Induced Ice Nucleation,Propagation,and Adhesion by Bioinspired Self-Healing Anti-Icing Coatings
Inhibition of Defect-Induced Ice Nucleation,Propagation,and Adhesion by Bioinspired Self-Healing Anti-Icing Coatings
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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 rate＜0.00048 cm2/s),and reduce ice adhesion on the surface(adhesion strength＜38.9 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.
Shu Tian、Ruiqi Li、Xinmeng Liu、Jiancheng Wang、Junyu Yu、Sijia Xu、Yunqing Tian、Jing Yang、Lei Zhang
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Department of Biochemical Engineering,Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(MOE),School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China
Binzhou Institute of Technology,Weiqiao-UCAS Science and Technology Park,Binzhou City,Shandong Province 256606,China
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