One-step sprayable durable superhydrophobic coatings based on discrete epoxy binders: fabrication and performance

the one-step spraying typically suffer from critical limitations of inadequate mechanical robustness and poor environmental durability, which severely constrain their practical deployment. This study innovatively proposes and employs a discrete epoxy resin adhesive system, aiming to effectively address the durability challenges inherent to one-step sprayed superhydrophobic coatings. Research findings demonstrate that the coatings fabricated using this approach retain exceptional superhydrophobicity (contact angle >150°, rolling angle <10°) even after rigorous testing regimes, including sandpaper abrasion, tape peeling, chemical corrosion, and ultraviolet (UV) aging. Consequently, their durability is significantly enhanced. This work provides an effective solution for developing high-performance superhydrophobic coatings that simultaneously feature a straightforward preparation process (one-step spraying) and excellent durability. It thereby holds significant value for advancing the large-scale practical application of this technology.