Study On The Design Of Organic-inorganic Composite Super-hydrophobic Coating And Anti-icing Performance

Wind energy is a renewable and clean energy with large reserves and wide distribution,which plays a crucial role in the field of electric power.However,wind turbines built in high latitude and cold regions often encounter severe icing problems,which can significantly reduce their wind power efficiency.A common anti-icing method is to spray an anti-icing coating on the surface of the substrate.The surface of this anti-icing coating often have nanostructures with low surface energy,which obtain superhydrophobic properties and can significantly reduce the heterogeneous nucleation of water,thereby effectively delaying the formation of ice.In this study,RF plasma modified silicon dioxide（P-Si O₂）and carbon nanotubes（P-CNT）were used as structural building units to prepare long-lasting hydrophobic ceramic coating materials with low surface energy micro/nanostructures,by combining them with hydrophobic film forming materials.Silica was used to build a certain roughness on the surface of the coating,the superhydrophobic properties of polydimethylsiloxane（PDMS）confer the fan blades with anti-icing performance.Using the photothermal conversion performance of carbon nanotubes and the superhydrophobic performance of PDMS to simultaneously confer the fan blades with de-icing and anti-icing performance.The main content and research results are as follows:（1）Silica corner materials were spheroidized by RF plasma spheroidization.The modified P-Si O₂,PDMS,epoxy resin（E51）,and ethyl acetate（EA）were ultrasonically dispersed,and sprayed onto the surface of the substrate to prepare a P-Si O₂/PDMS/E51superhydrophobic ceramic coating.The effect of P-Si O₂content on the hydrophobic and anti-icing performance of the coating was investigated.The results show that the contact angle of the coating is as high as 150.32°,and the rolling angle is as low as 8.51°.Under a low temperature environment of–20℃,the freezing time of the coating surface can be extended to 200 min,and whose weight gain after freezing decreases by98%compared to the primer coating.After 100 cycles of icing experiments,the coating still maintains excellent superhydrophobicity and anti-icing performance.The adhesion of this coating is up to 7.68 KPa.At the same time,the coating also exhibits multiple stability in terms of irradiation resistance and abrasion resistance.（2）Multiwalled carbon nanotubes（MWCNTs）were activated and modified using a low-temperature RF plasma method.The modified P-CNT,PDMS,E51 and EA were ultrasonically dispersed,spraying onto the surface of the substrate to prepare a P-CNT/PDMS/E51 superhydrophobic ceramic coating.The effect of P-CNT and PDMS content on the hydrophobic and anti-icing performance of the coating was investigated.The results show that the contact angle of the coating surface is as high as 150.43°,and the rolling angle is as low as 7.35°.The absorbance of P-CNT/PDMS/E51 coatings can be maintained at over 95%in a wide wavelength range of 300-2500 nm.Under irradiation with an intensity of 0.89 m W/cm²,the surface temperature of the coating can rapidly rise to over 40℃.In an environment of–20℃with a solar irradiated,the coating relies on the collaboration effect of superhydrophobic performance and photothermal performance.The surface temperature can rise to 9.2℃,rapidly melting the ice on the surface within 240 seconds,then using the superhydrophobic effect to make the ice and surface water droplets slide,achieving the purpose of de-icing.