The Study on Wettability of Super-Hydrophobic Composite Coatings Preparation by Surface Gelation Technology

The fluoropolymer/silicon sol composites were fabricated via conventional materials by using surface gelation technology; the hydrophobic models in the surfaces of the composite coatings were discussed. The wetting behavior of the composite coating surface exhibited Wenzel model when the surface's roughness was low enough, and Cassie model was available when roughness was high enough. It was assumed that the hierarchical structures of the composite coating agreed with the fractal structures described by Koch curve. Based on the fractal structure equation, the super-hydrophobic fractal structure model of the composite coating was constructed, the simulation agreed with the experimental data well.