Surfaces with excellent anti-wettability under giant deformation and fast healing would largely extend its adaptability and life span in anti-/deicing application. Here, a flexible membrane with significant dynamic water-repellence and photo-/electro-response healing capability is fabricated. A rolling angle of below 5° is remained after either being stretching to 1000% strain or 2000 cycles of tensile tests at 400% strain. More importantly, multi-scale cracks on the membrane can be diagnosed and repaired simultenously, and the healing efficiency reaches above 99% within 90 s even if completely fracture. Furthermore, for the unexpected ice-solid interlocking of passive anti-/de-icing surfaces, a heterogeneous wetting concave-convex coupling micro-nano structure is proposed from a multi-biomimetic perspective. We analyze the synergistic mechanism of structural morphology and spatial wetting differences on the detachment of surface condensation droplet and the freezing adhesion at interfaces, clarify the impact of key parameters on low-temperature interface heat transfer and droplet freezing phase transition, then overcome the adhesion and permeation of the liquid-gas interface into the gaps of structure during the freezing process. This work endows ice-phobic surface with the ability of damage detection and cyclic healing, and proposes a coupled biomimetic structure with spatial heterogeneous wettability to reduce the freezing strength, which is highly demanded in real-time anti-/de-icing application that involve inevitable mechanical damages.
 

Anti-icing,interface wettability;,Durability,self-healing