Robust Organic–Inorganic Composite Films with Multifunctional Properties of Superhydrophobicity, Self-Healing, and Drag Reduction

Multifunctional films have attracted wide attention in scientific research and engineering applications. Based on thermodynamically driven metathesis reactions of disulfide bonds, a self-healing film with disulfide bonds was designed and prepared, which was hot pressed by fluorinated silica particles (F-SiO2) to prepare an organic-inorganic composite film with superhydrophobicity and self-healing properties of 70.29% self-healing efficiency measured by tensile experiments. The increasing F-SiO2 showed various hierarchical structures on the composite films, resulting in elevated contact angles with the maximum up to 168° at 2.0 mg/cm2 of F-SiO2 surface density. Have been hot pressed 4 layers F-SiO2, the composite films had excellent wear-resistance with keeping superhydrophobiciy after 10 m sandpaper abrasion scan. Subjected to acidic solution, bend, finger-wiping and knife-scratch damage, the composite films still had excellent superhydrophobicity. In addition, the organic-inorganic composite films exhibi...