Self-cleaning metal surface as well as preparation method and preparation device thereof

A metal surface, self-cleaning technology, applied to the surface coating liquid device, metal processing equipment, special surface, etc., can solve the problems of long time consumption and environmental protection, and achieve long-lasting performance, high efficiency, green environmental protection and high efficiency Effect

Inactive Publication Date: 2021-01-12
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the above technical problems, and provides a self-cleaning metal surface and its preparation method and preparation device to solve the problems that the existing post-processing method takes too long and is not environmentally friendly

Method used

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  • Self-cleaning metal surface as well as preparation method and preparation device thereof
  • Self-cleaning metal surface as well as preparation method and preparation device thereof
  • Self-cleaning metal surface as well as preparation method and preparation device thereof

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preparation example Construction

[0061] The preparation device for the self-cleaning metal surface can also include heating equipment, which can be a drying oven, etc., for heating the surface of the metal 1 after laser treatment, so as to speed up the adsorption of organic matter on the surface of the metal 1 and increase the adsorption amount of organic matter .

[0062] In a specific example of the present invention, the working parameters of the pulsed laser 4 are: the laser wavelength is 800nm, the pulse width is 40fs, the repetition frequency is 1k-1MHz, and the laser power is 50mW-20W.

[0063] In some preferred embodiments of the present invention, the repetition frequency of the femtosecond pulsed laser is preferably 1 kHz, and the laser power is preferably 200 mW, and the contact angles of the surface wetting properties of the prepared metal 1 are all greater than 155°, showing super-lyophobic properties .

[0064] The foregoing describes the self-cleaning metal surface preparation device provided ...

Embodiment 1

[0094] Put the cleaned aluminum on the three-dimensional mobile platform, adjust the working parameters of the pulsed laser light source: the wavelength is 800nm, the pulse width is 40fs, the power is 200mw, the grid scanning interval is 100 microns, and the three-dimensional mobile platform moves at a speed of 1mm / s , the laser is irradiated onto the aluminum surface, and the aluminum surface is scanned to form a grid-like structure with an interval of 100 microns, and then heat-treated, and then heat-treated at 200° C. for 30 minutes. Titanium, iron, copper, zinc, 1:1 copper-titanium alloy, and 304 stainless steel are treated in the same way. Measurement results such as Figure 6 As shown, it can be seen that aluminum, titanium, iron, copper, zinc, 1:1 copper-titanium alloy, and 304 stainless steel all have a contact angle of about 150°. Except for zinc, they all have a rolling angle of about 10°, which is hydrophobic. / superhydrophobic state.

[0095] Microstructure obse...

Embodiment 2

[0105] Place the cleaned aluminum on the three-dimensional mobile platform, adjust the working parameters of the femtosecond pulsed laser source: the wavelength is 800nm, the pulse width is 40fs, the power is 200mw, the grid scanning interval is 300 microns, and the scanning speed is 1mm / s. to the aluminum surface, and then heat the aluminum surface at 200°C for 30 minutes to obtain a sample with a super-hydrophobic surface after processing, and test the contact angle and rolling angle of the aluminum surface respectively. For the results, see Figure 9 , showing that the contact angle is greater than 150° and the rolling angle is about 10°, showing superhydrophobic properties.

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Abstract

The invention discloses a self-cleaning metal surface as well as a preparation method and a preparation device thereof. A measurement method comprises the following steps that S1, the metal surface iscleaned and dried; S2, pulse laser is adopted to irradiate the metal surface to etch out nano-scale or micron-scale particles, organic matter is adsorbed to the metal surface obtained after laser etching, and the organic matter has a functional group used for reducing surface energy; and S3, heating treatment is carried out on the metal surface etched with the particles. According to the invention, the self-cleaning metal surface with a super-lyophobic characteristic or lyophobic characteristic can be prepared only through pulse laser and heating treatment, chemical process treatment is not needed, the process is simple, the efficiency is high, environmental protection is achieved, and the performance is lasting.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a self-cleaning metal surface and its preparation method and preparation device. Background technique [0002] The wetting properties of a solid surface are defined by measuring the contact angle of a water droplet when it comes into contact with that solid surface. When the contact angle is in the range of 90°-150°, the solid surface is defined as hydrophobic; when the contact angle is greater than 150°, the solid surface is defined as superhydrophobic. Superhydrophobic surfaces have low surface energy molecules. However, only using low surface energy molecules is not enough to form a superhydrophobic surface, and additional micro-nano composite structures are required on the solid surface. On the other hand, superhydrophobic surfaces exist in nature, such as lotus leaves, butterfly wings, fish scales, shark skin, etc., all of which have unique waterproof and self-cle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/14B05D3/04B05D3/06B23K26/352B23K26/362
CPCB05D3/0413B05D3/06B05D5/00B05D7/14B23K26/362B23K26/352
Inventor 吴志荣袁淦郭春雷
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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