Superhydrophobic coating pigmented with modified MXene for robust anticorrosion and efficient photothermal de-icing

This study develops a bilayer superhydrophobic coating pigmented with modified MXene for robust anticorrosion and efficient photothermal de-icing. The outer layer of the coating is a photothermal superhydrophobic polydimethylsiloxane coating modified with H-MXene@TiN, and the inner layer is an epoxy coating with a self-healing function provided by M-ZIF-8@PDA. The coating with a water contact angle of 154.7° exhibits a satisfactory anti−/de-icing efficiency with a stable icing-delay time (565 s at −15 °C) and fast photothermal de-icing capability (87 s under 1 sun and −15 °C). In addition, the coating maintains exceptional corrosion protection with |Z| 0.01 Hz values of 2.54 × 10 10  Ω·cm 2 after 60 days of immersion in a 3.5 wt% NaCl solution, which is several hundred times greater than that of the pure EP coating. The robust anticorrosion performance arises from the synergistic effects of controlled inhibitor release and enhanced passivation provided by M-ZIF-8@PDA.