High-durable and photothermal self-healing properties of a silicon-polyaniline superhydrophobic composite network inspired by wormsOA

The photothermal self-healing design is very beneficial for extending the lifespan of superhydrophobic materials,but the effective balancing of self-healing and superhydrophobic durability of materials remains a significant challenge.Inspired by worm structures,a facile photothermal responsive self-healing and high durability biomimetic superhydrophobic material(HPANI/BPDI)is constructed by combining dual cross-linking silicone resin(BPDI)with hierarchical roughly structured polyaniline(HPANI).Benefiting from the modulation of the HPANI worm-like structure,the material demonstrated excellent superhydrophobicity(water contact angle is approximately 152°).Moreover,the material can repair scratches by facilitating chain migration and reversible interaction at the interface within 20 min under 1.0 kW/m^(2) sunlight irradiation owing to its appealin g solar-to-heat conversion capability.This enhanced capability contributes significantly to passive anti-icing and active photothermal de-icin g applications by increasing the freezing delay time and reducing the melting time on prepared surfaces.Furthermore,the sample of HPANI/BPDI demon strated both mechan ical an d chemical stabilities when facing sandpaper abrasion,acid/alkaline immersion,and UV aging due to the adhesion function and shieldin g effect in the worm composite structure.Thus,the HPANI/BPDI inspired by the worm is anticipated to provide a general solution to the vexing issue of materials exhibiting tran sient hydrophobic characteristics.