Super-hydrophobic self-cleaning surface of wind power vane and preparation method

Abstract

The invention provides a super-hydrophobic self-cleaning surface of a wind power vane and a preparation method, and belongs to the technical field of wind power equipment manufacturing. A resin coating on the surface of the wind power vane is densely covered with columnar micron-sized structures, the outer surface of each columnar micron-sized structure is coated with a large amount of nano particles, and thus micro-nano secondary structures are formed; the preparation method of the super-hydrophobic self-cleaning surface of the wind power vane comprises the steps that the columnar micron-sized structures are prepared through ablation on the resin coating on the vane surface by directly utilizing pulse lasers, the nano particles are generated through induction on the outer surface of eachcolumnar micro-sized structure simultaneously based on the inductive effect of the pulse lasers, and thus the micro-nano secondary structures which combine the micron-sized structures with the nano structures are formed. The preparation method is simple, good in technological compatibility and high in designability, and can be prepared in large areas. The super-hydrophobic self-cleaning wind powervane can effectively lower the pollution caused by weathered of the vane, the possibility of freezing is lowered, the average annual working time of a wind turbine generator and the wind energy utilization efficiency are improved, the service life of the vane is prolonged, and therefore the super-hydrophobic self-cleaning wind power vane has important application prospects.

Description

technical field [0001] The invention relates to a wind power blade, in particular to a superhydrophobic self-cleaning surface and a preparation method thereof, belonging to the technical field of wind power equipment manufacturing. Background technique [0002] When water droplets fall on the surface of the material, due to the air-solid-gas three-phase interfacial tension and gravity, droplets with a certain shape will be obtained on the surface of the material, and the angle between the three phases can be measured by the contact angle θ. Generally, if the contact angle of water on the surface of a certain material is θ>90°, the surface is said to be hydrophobic, and if θ>150°, the surface is called superhydrophobic. Conversely, if the contact angle θ<90°, the surface is said to be hydrophilic. In addition to the contact angle, the rolling angle φ measures the dynamic behavior of water droplets on a solid surface, and is defined as the inclination angle of the su...

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Problems solved by technology

The disadvantages of existing methods are: first, many methods are only applicable to metal material systems, such as electrochemical corrosion method, etc. The surface of wind turbine blades is a layer of resin coating, and its physical and chemical properties are very different from those of metals. Second, some methods adopt the method of "bottom-up" preparation of coatings, and obtain a layer of hydrophobic coating on the material substrate through self-assembly and coating methods. The problem of insufficient substrate binding

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