Breathable, self-cleaning superhydrophobic DDA-PDA@BNNS/silicon resin coating

Self-cleaning coatings need to have a certain degree of breathability to avoid peeling due to interfacial stress. In this study, a multifunctional superhydrophobic breathable DDA-PDA@BNNS/silicon resin coating is successfully designed by modifying sucrose-assisted exfoliation of boron nitride nanosheets (BNNS) with dodecylamine (DDA) and polydopamine (PDA). The coating shows a contact angle as high as 153.6° and a rolling angle as low as 4.8°, which can effectively avoid the adhesion of solid and liquid contaminants and extend the freezing time of ice up to six times. Meanwhile, the porous network structure of boron nitride nanosheets hardly changes the water vapor transmission rate of the substrate material. The DDA-PDA@BNNS/silicon resin breathable superhydrophobic coating is expected to achieve practical applications in long-lasting self-cleaning and antifouling.