A feasible approach to superhydrophobic coating: mixing waste stone powder and perfluorooctane solution

Superhydrophobic coatings have attracted significant attention due to their broad application prospects in self-cleaning properties and enhancing the corrosion resistance of various materials. These coatings, characterized by water contact angles greater than 150° and sliding angles smaller than 10°, can effectively inhibit the contact between a surface and water or environmental humidity, just like lotus leaves, thereby mitigating corrosion and its associated economic losses. In this work, a possible approach to achieving superhydrophobic coatings involves the mixing of specially processed waste stone powder (called PV7) and a solution called PV22 (which is formulated from perfluoro octane and other solvents.). The superhydrophobic coating prepared by PV7 and PV22 has good performance. Electron microscope analysis shows that the optimal ratio of PV7 to PV22 is 5:2, which can form closely spaced bumps on the surface and form an efficient gas chamber. contact angle measurements confirmed the hydrophobicity of the coating, reaching a maximum contact angle of 150° at the above ratio. Water contact experiments show that the 5.0g PV7+2.0g PV22 coating group has effective waterproof ability, indicating that it has practical application potential in realizing surface self-cleaning and corrosion resistance.