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A kind of high-performance superhydrophobic metal surface and preparation method thereof

A metal surface, super-hydrophobic technology, used in special surfaces, pre-treatment surfaces, devices for coating liquids on surfaces, etc. Corrosion uneven and other problems, to achieve excellent hydrophobicity, improve the surface micro-nano rough structure, overcome the effect of surface roughness

Active Publication Date: 2022-05-20
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the superhydrophobic surface prepared by chemical etching method still has the following problems: (1) the etching solution mostly uses high-concentration strong acid or strong alkali, which has the disadvantages of high corrosion and great harm to human body and environment; Etching has the characteristics of uneven corrosion and difficult control of the etching reaction process, which can easily cause uneven roughness of the etched metal surface and fail to achieve a good micro-nano structure, resulting in low hydrophobicity and even partial failure of the metal surface. superhydrophobicity requirement

Method used

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  • A kind of high-performance superhydrophobic metal surface and preparation method thereof
  • A kind of high-performance superhydrophobic metal surface and preparation method thereof
  • A kind of high-performance superhydrophobic metal surface and preparation method thereof

Examples

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Embodiment 1

[0045] (1) Pretreatment: use 1200 # Grind with sandpaper, then ultrasonically clean the aluminum alloy with deionized water, acetone, and absolute ethanol in sequence for 5 minutes each, and then vacuum dry in a vacuum oven at 30°C for 20 minutes;

[0046] (2) Chemical etching: immerse the sample treated in step (1) into 0.8mol / L CuCl 2 In the solution, etch at room temperature for 10 minutes, ultrasonically clean with deionized water for 5 minutes after etching, and then vacuum dry in a vacuum oven at 30°C for 20 minutes;

[0047] (3) Hot water treatment: soak the sample treated in step (2) in 85°C hot water for 1 hour, then rinse with deionized water, and vacuum dry in a vacuum drying oven at 30°C for 20 minutes;

[0048] (4) Micro-nano composite structure construction: disperse silica particles with a particle size of 50nm and a particle size of 100nm in absolute ethanol at a ratio of 4:1, and prepare nano-silica ethanol with a mass fraction of 5% solution, and then immer...

Embodiment 2

[0052] (1) Sample treatment: use 1200 # Grind with sandpaper, then ultrasonically clean the aluminum alloy with deionized water, acetone, and absolute ethanol in sequence for 5 minutes each, and then vacuum dry in a vacuum oven at 30°C for 20 minutes;

[0053] (2) Chemical etching: immerse the sample treated in step (1) in 0.8mol / L NaOH solution, etch at room temperature for 20 minutes, after etching, use deionized water to ultrasonically clean it for 10 minutes, and then place it in a vacuum oven at 30°C Dry in medium vacuum for 20min;

[0054] (3) Hot water treatment: soak the sample treated in step (2) in 85°C hot water for 1 hour, then rinse with deionized water, and vacuum dry in a vacuum drying oven at 30°C for 20 minutes;

[0055] (4) Construction of micro-nano composite structure: disperse silica particles with a particle size of 50nm and a particle size of 100nm in absolute ethanol at a ratio of 2:1, and prepare nano-silica ethanol with a mass fraction of 10% soluti...

Embodiment 3

[0059] (1) Sample treatment: use 1200 # Grind with sandpaper, then ultrasonically clean the aluminum alloy with deionized water, acetone, and absolute ethanol in sequence for 5 minutes each, and then vacuum dry in a vacuum oven at 30°C for 20 minutes;

[0060] (2) chemical etching: the HCl of 1mol / L and the H of 30% (wt) 2 o 2 Mix at a volume ratio of 10:1 to prepare an acid-oxidant synergistic etching solution, then immerse the sample treated in step (1) in the prepared etching solution, etch at room temperature for 15 minutes, and use it after etching Ultrasonic cleaning with deionized water for 10 minutes, and then vacuum drying in a vacuum oven at 30°C for 20 minutes;

[0061] (3) Hot water treatment: soak the sample treated in step (2) in 85°C hot water for 1 hour, then rinse with deionized water, and vacuum dry in a vacuum drying oven at 30°C for 20 minutes;

[0062] (4) Micro-nano composite structure construction: disperse silica particles with a particle size of 50n...

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Abstract

The invention discloses a high-performance super-hydrophobic metal surface and a preparation method thereof. The preparation steps include: chemically etching a clean metal sample to obtain a metal surface with a micron structure, then soaking it in hot water and coating it with nanoparticles Soak the grafted nanoparticles in the dispersion liquid, and finally soak in the solution of low surface energy substances for surface modification, and obtain the high-performance super-hydrophobic metal surface. The superhydrophobic metal surface prepared by the invention shows a high water contact angle, which not only has excellent hydrophobicity, but also has good anti-fog, anti-frost, and anti-icing properties; The rough and uneven structure of the metal surface after etching can be treated with hot water to stabilize the surface structure, and then a more uniform and continuous micro-nano structure is formed by grafting nanoparticles with hydrophobic properties on the surface. Excellent superhydrophobic properties.

Description

technical field [0001] The invention relates to the technical field of super-hydrophobic surfaces, in particular to a high-performance super-hydrophobic metal surface and a preparation method thereof. Background technique [0002] Aluminum and aluminum alloys are a very important class of engineering metal materials. They are widely used in aviation, aerospace, construction, automobiles, ships and machinery manufacturing and other fields. However, since the surface of aluminum and aluminum alloys does not have self-cleaning properties, it is easy to be polluted, and it is easy to be corroded in humid environments such as acid, alkali, and salt, and there are defects such as easy icing on the surface. many questions. For example, icing on the surface of the aircraft will change the shape of the aircraft, and the aerodynamic characteristics and performance of the aircraft will also change accordingly, which will not only increase the energy consumption of the aircraft, but a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14B05D5/00B05D3/10B05D7/24C23F1/14C23F1/20C23F1/36
CPCB05D7/14B05D5/00B05D3/102B05D7/24B05D7/546C23F1/14C23F1/20C23F1/36B05D2202/25B05D2451/00
Inventor 彭华乔王强李林叶李薇王天明张亚博张帆刘曦非夏祖西苏正良
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA