Advanced Slippery Coatings Featuring Ternary Photothermal Traps for Superior Anti/De‐Icing and Anti/De‐Frosting Efficiency in Extreme Dynamic Cold Environment

Abstract

Abstract In extreme cold and dynamic environments, active and passive ice‐phobic coatings face performance degradation due to surface issues and low photoelectric‐thermal conversion. Photothermal solid‐like slippery ice‐phobic coating (PSSC) is developed using the “yin‐yang associative elements” idea. By combining low‐thermal‐conductivity microspheres, nano‐porous aerogels, silicone oil, and epoxy, PSSC forms a micro‐nano‐nano light‐trapping structure and a slippery surface. It has a 2.6° water sliding angle, 9.2 kPa ice adhesion, and an icing delay 79.5 times that of bare aluminium (Al). Moreover, PSSC also exhibits excellent corrosion resistance and environmental durability. After 30 days of ultraviolet (UV) irradiation and saltwater immersion, the sliding angle increases minimally. Its structure boosts photothermal performance, heating 148 °C in 20 s under 1 sun irradiation. At –20 °C, it melts ice fast with 1 sun irradiation. Notably, at –20 °C, 80% Relative Humidity (RH), in an 80 rpm min −1 dynamic photothermal defrosting test, PSSC defrosts in 180 s. The PSSC can achieve rapid ice removal within 180 s at −30 °C. PSSC's excellent ice‐phobic ability in extreme cold environments offers new thoughts for advanced coating development.