Method for preparing Janus composite coating through interface assembly

The invention relates to the technical field of coating preparation, and particularly discloses a method for preparing a Janus composite coating through interface assembly, and the method comprises the following steps: enabling a base material to directly enter a nano-clay water-phase solution through a polymer oil-phase solution, so that the surface of the base material forms the Janus composite coating in the nano-clay water-phase solution; wherein the polymer oil phase solution comprises a protonizable functional polymer; the pH (Potential of Hydrogen) of the nano clay water phase solution is 4.5 to 7. According to the method disclosed by the invention, dewetting is effectively inhibited through interface assembly, and the phenomena of non-uniformity and fracture of the coating are prevented; and the smooth and thickness-controllable Janus composite coating is prepared by controlling various parameters, and the preparation method has a relatively great application prospect in the technical field of coating