Template Preparation and Experimental Study on Superhydrophilic-Superoleophobic Nano-structures Surfaces Based on Titanium Mesh Membrane

Abstract

Abstract With the development of industrial process, the crude oil leakage of industrial oil wastewater is increasingly serious. The development of efficient and environmentally friendly separation mesh membrane technology is the best way to solve the water pollution problem. With the rapid development of micro-nanotechnology, the wetting change caused by surface structure (micro-nano scale) that can solve the problem of fabrication for oil-water separation mesh. If the liquid contact angle at the surface is less than 10°, the surfaces are called superhydrophilic surfaces. Meanwhile, the liquid contact angle is greater than 150°, the surfaces are called superhydrophobic surface. Surface with superhydrophilic/superhydrophobic is also known as special wetting surfaces. The special wetting surface is fabricated by coating / spraying. The process is simple and easy to operate. By constructing the multi-stage surface roughness and reducing the surface energy, the titanium mesh with different orders are used as the base. the mesh membrane with special superhydrophilic-superoleophobic properties is constructed. Comparing the influence of titanium mesh with different molybdenum numbers (mesh size) on hydrophilic/ hydrophobicity, the mechanism of the macroscopic size of the pore spacing substrate on the special surface wetting is analyzed. The preparation of ultra-hydrophobic multi-stage surface roughness titanium mesh is realized. The experimental analysis of oil and water separation effect is carried out. For the preparation of high-efficiency oil-water separation mesh film that can be used in industrial production. The oil and water separation mesh membrane was prepared by the titanium mesh substrate to achieve effective oil and water separation.