Preparation of water-based fluorine-free super-hydrophobic coating and application of water-based fluorine-free super-hydrophobic coating in paper products or non-paper products

The invention belongs to the field of water-based hydrophobic coatings, and particularly relates to a preparation method of a water-based fluoride-free super-hydrophobic coating and application of the water-based fluoride-free super-hydrophobic coating in paper products or non-paper products. The preparation method comprises the following steps: firstly, adsorbing an alkyl silane reagent on the latex particle surface of a commercially available alkyl ketene dimer (AKD) water-based emulsion through hydrophobic interaction, dispersing, and then introducing an aqueous dispersion of hydrophilic silicon dioxide nanoparticles to generate a coarse structure; after water is evaporated in the film forming process, the silicon dioxide nanoparticles and alkyl silane are subjected to a coupling reaction and are uniformly dispersed, and the water-based fluoride-free super-hydrophobic coating is prepared after mechanical stirring. The water-based paint is low in cost, green and environment-friendly and does not need comple