Underwater super-oleophobic compound coating on glass surface and preparation method thereof

The invention provides an underwater super-oleophobic compound coating on a glass surface and a preparation method thereof. The method comprises the following steps: pretreating the surface of the glass; immersing the pretreated glass surface in a 3-aminopropyltriethoxysilane solution for a reaction, and realizing modification; immersing the modified glass surface into a phytic acid solution for reaction; and adding ferric iron salt into the phytic acid solution, and continuously soaking the glass surface in the solution, so that the generated phytic acid-Fe < 3 + > complex is fully adsorbed on the surface, and the underwater super-oleophobic compound coating is obtained. Compared with the prior art, the compound coating of the 3-aminopropyltriethoxysilane and the phytic acid -Fe < 3 + > complex can greatly improve the hydrophilicity of the surface and realize super oleophobicity in water. The conditions for preparing the whole coating are mild, and harsh operation conditions such as high temperature and high