Abstract
Aiming at the problem of wind turbine blades' icing, a carbon nanotube composite photothermal coating with both active deicing and passive anti-icing properties was prepared by the spin-coating method. The results indicate that the lubricating coating doped with carbon nanotubes can effectively delay freezing time and reduce ice adhesion strength. The spin-coated 6-layer coating can achieve the best photothermal conversion performance and consume relatively few nanomaterials to maximize the capture of energy in near-infrared light. Under the irradiation of near-infrared light (808 nm), the surface temperature of the coating can reach 97.1°C, which has good photothermal conversion performance. The antifrosting ability of carbon nanotube nanocomposite photothermal coating is related to the content of lubricating oil, and the defrosting performance is related to the content of carbon nanotubes in the coating. Adopting the lubrication-photothermal synergistic deicing method can greatly shorten the deicing time, which is compared with only using photothermal deicing from 392 s to 51 s.
Highlights
The icing of wind turbine blades is one of the important factors affecting power generation efficiency of wind turbines [1, 2]
The reason is that pdms and Carbon nanotubes (CNTs) are the main factors that affect the strength of ice adhesion, while all coatings use PDMS as the substrate, and the spin coating method contains a similar number of CNTs in each layer
Thermal infrared imaging analysis found that the surface temperature of CNT nanocomposite photothermal coating under the irradiation of near-infrared light rose from 25°C to 122.1°C within 55 s, and the surface ice could be melted within 33 s
Summary
The icing of wind turbine blades is one of the important factors affecting power generation efficiency of wind turbines [1, 2]. The Aizenberg research group of Harvard University first prepared a smooth liquid injection porous surface (SLIPS) with lubricating properties It has a slight sliding angle, low contact angle hysteresis, and self-healing characteristics when damaged [17]. Smooth liquid injection porous surface has been proved to be the most effective method to reduce the strength of ice adhesion and prolong the freezing time [22] Both the superhydrophobic coating and the selflubricating coating only have a passive anti-icing effect and can still be covered by ice at extremely low temperatures. CNTs with photothermal properties are introduced as fillers in this paper to explore the effect of the addition of CNTs on the anti-icing and deicing performance of SLIPS coating and to prepare a lubricating-photothermal synergistic deicing CNT coating It provides a new idea for solving the problem of icing on the surface of wind turbine blades
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