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

A wind power blade, self-cleaning technology, applied in wind power generation, wind turbines, mechanical equipment and other directions consistent with the wind direction, can solve the problem of insufficient bonding force between the hydrophobic coating and the substrate, and achieve good designability and flexibility, Wide application range and good process compatibility

Inactive Publication Date: 2018-03-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 ver

Method used

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

Examples

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preparation example Construction

[0033] A method for preparing the surface of a superhydrophobic self-cleaning wind power blade provided by the invention is characterized in that the method comprises the following steps:

[0034] 1) Using pulsed laser to directly ablate the resin coating on the surface of the blade to prepare a columnar micron-scale structure, based on the inductive effect of the pulsed laser, simultaneously induce the generation of nanoparticles on the outer surface of each columnar micron structure, forming a micron structure plus a nanostructure The micro-nano secondary structure; the columnar micro-structures are densely arranged in quadrilateral or hexagonal shapes on the surface of the blade; the spacing is 30-100 microns. The pulsed laser is generally nanosecond laser, picosecond laser or femtosecond laser.

[0035] 2) Modifying the surface of the wind power blade densely covered with micro-nano secondary structures after the above-mentioned pulsed laser treatment with low surface ener...

Embodiment 1

[0036] Example 1: Preparation of superhydrophobic self-cleaning polyacrylate resin wind turbine blades by femtosecond laser

[0037] The main component of the wind power blade coating treated in this embodiment is polyacrylate resin, including the following steps:

[0038] 1) Ultrasonicate the sample in deionized water for 5 minutes to remove dust, large particles and other dirt on the surface, and then dry it with compressed air. Using femtosecond laser, the laser wavelength is 1.03μm near infrared, the beam is Gaussian distribution, beam quality factor M 2 2 , using a high-speed scanning galvanometer to scan the surface in an orthogonal grid with a line spacing of 40 μm. A groove structure with a period of 40 μm was obtained on the scanned surface, and the height of the microcolumns was measured to be 42.0 μm using a laser confocal microscope. The scanning electron microscope photograph of the obtained structure is as follows Figure 1a As shown, the nanoparticles covered ...

Embodiment 2

[0042] Example 2: Using femtosecond laser to prepare superhydrophobic self-cleaning polyurethane coating wind power blades

[0043] In this embodiment, a material system different from Example 1 is selected as the processing object, and the main component of the processed wind power blade coating is polyurethane resin, including the following steps:

[0044] 1) Ultrasonicate the sample in deionized water for 5 minutes to remove dust, large particles and other dirt on the surface, and then dry it with compressed air. Using femtosecond laser, the laser wavelength is 1.03μm near infrared, the beam is Gaussian distribution, beam quality factor M 2 2 , using a high-speed scanning galvanometer to scan the surface in an orthogonal grid with a line spacing of 40 μm. A columnar structure with a period of 40 μm was obtained on the scanned surface, and the height of the microcolumns was measured to be 37.8 μm using a laser confocal microscope. The scanning electron microscope photograp...

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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...

Claims

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Application Information

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IPC IPC(8): B23K26/00F03D1/06F03D3/06C09D133/04C09D175/04
CPCB23K26/352C09D133/04C09D175/04F03D1/0675F03D3/062Y02E10/72Y02E10/74Y02P20/10
Inventor 钟敏霖张红军王凯扬
Owner TSINGHUA UNIV
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