Nano-materials, micro-nano composite materials, especially micro-nano composite materials with special wettability (such as superhydrophobicity, superhydrophobicity, etc.). ) has a wide application prospect in people's daily life and various departments of national production, which has also aroused widespread concern in the scientific community. Because the wettability of solid surface depends on its chemical composition and surface morphology, the surface wettability of solid materials can be controlled by changing the surface free energy and surface morphology of solid. Based on this theory, this paper starts with the surface chemical composition and surface microstructure of solids, constructs the surface of micro-nano structure through various technical means and chemicals, and controls the surface free energy of the prepared structure at the same time, so as to control the wettability of the solid surface and lay the foundation for the further application of functional nano-interfaces. The main contents are as follows:

1. The micro-morphology of rose surface was replicated and repaired on PDMS surface by polymer secondary recombination method, and a bionic superhydrophobic surface with high viscosity was prepared. The results show that the high viscosity and superhydrophobicity of the prepared surface are determined by its special mastoid microstructure, groove nanostructure and PDMS surface chemical composition. In addition, due to its high viscosity, super-hydrophobic properties and certain acid-base corrosion resistance, the prepared surface can be applied to the transmission of trace liquids, especially corrosive liquids.

2. The superhydrophobic surface with micro-nano composite structure was constructed on the surface of copper and zinc by self-assembly method. The method is very simple, and the prepared surface has excellent hydrophobic and oleophobic properties. The contact angle between water and oil is above160, and water droplets and oil droplets easily roll off the prepared surface, and the rolling angle is less than 5. In addition, the prepared surface has excellent chemical and thermal stability. Various characterization results and theoretical analysis show that the excellent superhydrophobicity and stability of the prepared surface are determined by its own special chemical structure and surface morphology.

3. Stable superhydrophobic surfaces with anticorrosion properties were prepared on various metals and alloys (copper, iron, titanium, zinc, aluminum, copper-zinc alloy, etc.). ) by one-step electrochemical deposition. The method has the advantages of simple operation, fast reaction speed and good universality. In addition, the above method can be used to construct a super-hydrophobic/super-lipophilic mesh structure on the metal mesh to realize oil-water separation.