Self‐Healing Electrothermal Anti‐Icing/De‐Icing Composites With Excellent Superhydrophobicity

This study addresses the high energy consumption, susceptibility to superhydrophobic performance degradation, and insufficient durability of electrothermal anti-icing/de-icing composites by developing a self-healing superhydrophobic/electrothermal composite structure (SS-EC) consisting of a porous polydimethylsiloxane (PDMS) thermal insulation layer, a graphene electrothermal layer, and a fluorinated boron nitride/self-healing polyurethane (F-BN/PUU) superhydrophobic layer. The SS-EC exhibits excellent wettability, self-healing capability, electrothermal conversion performance, and anti-icing/de-icing performance, with a water contact angle of 155° and a sliding angle of 6.4°, surface scratches can be repaired within 2 h of electrical heating, while the contact angle remains above 145.2° after five healing cycles; under -5 and -15°C conditions, the icing delay times reach 1415 and 1012 s, respectively, while the corresponding de-icing times are only 44 and 54 s. The structure achieves synergistic optimization of multiple functionalities, providing a new strategy for the design of long-life, low-energy-consumption anti-icing/de-icing materials.