Photo/Electro‐Thermal Superhydrophobic Wood with Phase Change Materials for Highly Efficient Anti‐/Deicing

Abstract Superhydrophobic surfaces integrating photo‐thermal and electro‐thermal have been regarded as one of the most promising anti‐/deicing approaches in all‐weather conditions. However, excessive energy consumption remains a significant obstacle to their development. Bioinspired by the energy storage and conversion functions of creatures surviving in extremely cold environments, the naturally anisotropic porous wood is performed as a substrate and a photo/electro‐thermal superhydrophobic phase change wood with highly efficient anti‐/deicing performance is developed. The abundant and unique anisotropic wood channels coated with polypyrrole (PPy) nanoparticles, combining with phase change materials (PCMs), results in superior energy conversion performance in the longitudinal channels and increased loading capacity for PCMs. Meanwhile, the superhydrophobic carbon nanotubes (CNT) coatings endow wood with excellent encapsulation and durable stability. Owing to the photo/electro‐thermal efficiency up to 91.1% and 96.7% under low‐temperature conditions, the photo/electro‐thermal superhydrophobic phase change wood exhibits high‐performance anti‐/deicing for application in wooden building roofs. This strategy offers potential toward developing sustainable, all‐weather and highly efficient anti‐/deicing.