Durable deicing lubricant-infused surface with photothermally switchable hydrophobic/slippery property

Lubricant infused surfaces (LISs) are promising platforms to address the icing problems, but their long-term stability remains a significant challenge. In this study, a durable LIS with photothermal response and reversible solid/liquid transformation was fabricated to rapidly thaw frost accumulation and reduce ice accretion. The newly designed LIS was manufactured by infusing low-melting cocoa oil and efficient photothermal Fe 3 O 4 nanoparticles into anodized aluminum oxide substrate. Upon irradiation with infrared light, the Fe 3 O 4 nanoparticles could absorb light energy and melt the solid lubricant into slippery liquid. The dual actions of surface heating and slipperiness of melted lubricant promoted the thawing of frost/ice and de-adhesion of ice block. Additionally, the durability of LIS was strengthened by the combination of the self-healing effect of the melted lubricant, and the robustness of the solid state. The hydrophobic lubricant diminished the lubricant loss during repeating freezing/unfreezing cycles and withstood longtime flowing water impact. The proposed concept of switchable hydrophobic/slippery lubricant will advance the design of durable LISs and provide a promising LIS platform for deicing application.