Study On Hydrophobic And Anti-erosion Behaviors Of Fluorocarbon Coating

Fluorocarbon resin has excellent shock resistance performance, combined with excellent weather fastness, so the fluorocarbon resin is undoubtedly ideal choice for wind power topcoat film-forming substances. In particular, FEVE fluorocarbon resin cured at room temperature can effectively solve the problem of wind power coatings, meeting the design requirements of life problems. This project focused on improving the performance of wind power protective coatings, designing rational film thickness and seeking a low-cost wind power coating which is more suitable for our special environment of China.Factor-5 level-4 was designed, and the optimized formula was determined by investing the appearance, hydrophobic properties and environmental resistance. The main work as follows: highly hydrophobic coatings were prepared based on fluorocarbon resin as the main forming material and isocyanate as curing agent following with titanium dioxide, Teflon, silica, alumina and functional additives; composite coatings were prepared with different diameter, different kinds of ceramic particle the modified fluorocarbon coating; modified coating and composite coating were measured by contact angle measurement, observe the micro-structure and the test of mechanical properties, focusing on the study of the hydrophobic properties the anti-erosion properties and anti-freezing performance.The results show that: the viscosity and the fineness of coating solution meet the standard of the fluorocarbon topcoat; the adhesion of the coating is 1 stage, the thickness is about 80-100μm, the hardness is 2H, the impact strength is 50 kg.cm, the surface is smooth; the static water contact angle is 136.1 degrees, has excellent durability, surface roughness is 0.774μm; the micro morphology of modified coatings is micro/nano rough structure; through test of chemical resistance, weather fastness, heat resistance performance, we prove that the modified coating has excellent environmental resistance; By added Si C, Al N ceramic particles to the modified hydrophobic coating, we improve the erosion resistance of composite coating, the anti-erosion performance test shows that the composite coating has the best anti-erosion ability, change the erosion condition to study the mechanism of erosion wear further; Unlike the modified coating, the hardness of composite coating is 3H, the contact angle is 133.5 degrees, the surface roughness is 1.122μm, also has excellent environmental resistance; the anti-icing properties of modified coating and composite coating surfaces are systematic investigated by characterizing the intrinsic anti-freezing ability of deposited droplets and recording the dynamic behaviors of the subcooled water flow. As a result, the high hydrophobic surface can intrinsically inhibit the occurrence of deposited droplets freezing events and have a robust anti-icing performance to the subcooled droplets and flow, which reaches an average or better level in comparison with the reported literature values. In addition, the anti-freeze advantages of such high hydrophobic surface structure is also analyzed by the classical nucleation theory.