Fabrication Of The Anti-corrosion And Wear-resistant Polymer-based Hydrophobic And Oleophobic Coatings

The development of new materials is current research emphasis and hotspot. Hydrophobic and oleophobic(amphiphobic) functional biomimetic materials, with the characteristics of impermeability, have broad prospects both in academic research and practical industrial applications. However, how to use a simple, inexpensive, rapid, non-polluting preparation process to prepare a functional amphiphobic coating has been a problem which was always plaguing researchers.In this paper, a simple etching and spraying method has been used to obtain a wear-resistant,corrosion-resistant functional superhydrophobic and high oleophobic coating. Besides that,the non-fluorinated amphiphobic coating was also been explorated. The surface topography,amphiphobic characteristic and the other performance of composite coatings are characterized by using SEM, contact angle measurement, TGA, FT-IR, XRD and the electrochemical workstation. The main contents can be summarized as follows:(1) A simple spraying method was adopt to prepare polymer/metal oxide composite coating, and then with acid etching and low surface energy materials(zinc stearate)modification, getting non-fluorinated superhydrophobic and high oleophobic composite coating. The varying degrees of nano/micro rough grading structure could be controlled by etching reaction time.(2) Non-fluorinated superhydrophobic and high oleophobic composite coating was obtained by using carbon nanotube and metal oxide nanoparticles which was chemically modified. The network-like rough surface morphology formed by the accumulation of carbon nanotubes play an important role in the preparation process. We can conclude that the contact angle of water, ethylene glycol, glycerol was 167°, 139°, 142°, respectively. The amphiphobic coating can still maintain high hydrophobicity and oleophobic properties even under 150℃high temperature or corrosive solution treatment. The coating also has a high adhesion, which can maintain the water droplets not falling even turn over 90° or 180°.(3) The prepared fluorine-containing composite amphiphobic coatings with low surface energy materials and the nano/micro binary structure have the excellent amphiphobic. And the static contact angle, dynamic contact angle, heat-resistant, wear-resistant, corrosion-resistant was also been discussed. We can concluded that the water contact angle of the composite coating is 173°, and the contact angle for ethylene glycol, glycerol is 144°, 147°, respectively.At the same time, the amphiphobic composite coating has good heat-resistance,wear-resistance, corrosion-resistance property. The coating can maintain high hydrophobicityand oleophobic properties after high temperature, corrosive solution treatment or even after prolonged friction experiments.