Preparation of Superhydrophobic Polyurea Coatings Modified with Organofluorosilicon and Nanoparticles

The practical application of superhydrophobic coatings is limited by fabrication difficulties, poor mechanical properties, and low durability. In this study, coatings were prepared by blending organofluorosilicon-modified polyurea with hydrophobic nano- to submicron-sized particles, and their post-curing properties were investigated. The results show that under optimal parameters, the coatings exhibited a water contact angle of 151°, a rolling angle of less than 10°, a tensile strength of 12 MPa, and a tensile elongation at break of 220%. Even after 25 cycles of sandpaper abrasion and heating at 100°C for 1 hour, the coatings maintained their superhydrophobic properties, demonstrating excellent acid-alkali corrosion resistance and self-cleaning capability.