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Method for preparing aluminum alloy superhydrophobic self-cleaning surface by using ultrashort pulse laser

An ultra-short pulse laser and aluminum alloy surface technology, which is applied in the field of metal substrate surface modification, can solve the problems of low processing efficiency, harsh processing environment, and high price, and achieve the effects of convenient operation, easy industrial application, and low cost

Inactive Publication Date: 2015-09-30
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent with application number 200910021923.4 discloses a method for preparing super-hydrophobic microstructures on metal surfaces with femtosecond lasers. Although these femtosecond lasers can be used to process very precise microstructure surfaces, this simple method cannot cover up the femtosecond superhydrophobic microstructure. The inherent disadvantages of lasers, such as extremely expensive, low processing efficiency, and harsh processing environments

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  • Method for preparing aluminum alloy superhydrophobic self-cleaning surface by using ultrashort pulse laser
  • Method for preparing aluminum alloy superhydrophobic self-cleaning surface by using ultrashort pulse laser
  • Method for preparing aluminum alloy superhydrophobic self-cleaning surface by using ultrashort pulse laser

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Embodiment 1

[0041] A method of preparing an aluminum alloy superhydrophobic self-cleaning surface using an ultrashort pulse laser in this embodiment includes the following specific steps:

[0042] Step 1: Polish the 2a12 aluminum alloy to be processed, select a metallographic sample pre-grinding machine with a power of 370W, a grinding disc rotation speed of 450 rpm, and a grinding disc diameter of 230 mm. The polishing process requires an auxiliary diameter of 200 mm and 1000 mesh SiC water sandpaper is used to polish the surface of the aluminum alloy, and the polishing range is 100cm 2 , the polishing time is 10 minutes, and the aluminum alloy sample after surface polishing is obtained;

[0043] Step 2: Clean the aluminum alloy sample after the surface polishing described in step 1 with an ultrasonic cleaner, the ultrasonic frequency of the ultrasonic cleaner is 40 kHz, submerge the surface of the sample with deionized water with a resistivity of 18.25 megohm, and clean continuously at ...

Embodiment 2

[0051] A method of preparing an aluminum alloy superhydrophobic self-cleaning surface using an ultrashort pulse laser in this embodiment includes the following specific steps:

[0052] Step 1: Polish the 2a12 aluminum alloy to be processed, select a metallographic sample pre-grinding machine with a power of 370W, a grinding disc rotation speed of 450 rpm, and a grinding disc diameter of 230 mm. The polishing process requires an auxiliary diameter of 200 mm and 1000 mesh SiC water sandpaper is used to polish the surface of the aluminum alloy, and the polishing range is 100cm 2 , the polishing time is 10 minutes, and the aluminum alloy sample after surface polishing is obtained;

[0053] Step 2: Clean the aluminum alloy sample after the surface polishing described in step 1 with an ultrasonic cleaner, the ultrasonic frequency of the ultrasonic cleaner is 40 kHz, submerge the surface of the sample with deionized water with a resistivity of 18.25 megohm, and clean continuously at ...

Embodiment 3

[0061] A method of preparing an aluminum alloy superhydrophobic self-cleaning surface using an ultrashort pulse laser in this embodiment includes the following specific steps:

[0062] Step 1: Polish the 2a12 aluminum alloy to be processed, select a metallographic sample pre-grinding machine with a power of 370W, a grinding disc rotation speed of 450 rpm, and a grinding disc diameter of 230 mm. The polishing process requires an auxiliary diameter of 200 mm and 1000 mesh SiC water sandpaper is used to polish the surface of the aluminum alloy, and the polishing range is 100cm 2 , the polishing time is 10 minutes, and the aluminum alloy sample after surface polishing is obtained;

[0063] Step 2: Clean the aluminum alloy sample after the surface polishing described in step 1 with an ultrasonic cleaner, the ultrasonic frequency of the ultrasonic cleaner is 40 kHz, submerge the surface of the sample with deionized water with a resistivity of 18.25 megohm, and clean continuously at ...

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Abstract

The invention relates to a method for preparing an aluminum alloy superhydrophobic self-cleaning surface by using an ultrashort pulse laser, belonging to the technical field of metal substrate surface modification. The method comprises the following steps: carrying out polishing pretreatment on an aluminum alloy sample, cleaning the sample surface respectively with deionized water and anhydrous ethanol, blow-drying with cool air or drying in air, and carrying out surface treatment on the sample by using a laser processing technique after adjusting related technological parameters by an ultrashort pulse laser so as to obtain countless microstructures on the sample surface; and after finishing processing, putting the processed sample into an electrothermal drying box, and baking to obtain the aluminum alloy superhydrophobic surface with a micron-sized mastoid or porous structure on the surface, wherein the surface has the self-cleaning function and has excellent friction resistance and corrosion resistance. The preparation method has the advantages of simple technique, high efficiency, low energy consumption, low cost and environment friendliness, is convenient to operate, and can easily implement industrial application.

Description

Technical field: [0001] The invention belongs to the technical field of surface modification of metal substrates, and relates to a method for preparing a bionic superhydrophobic self-cleaning surface on an aluminum alloy substrate. More specifically, the invention relates to a method for preparing an aluminum alloy superhydrophobic self-cleaning surface by using an ultrashort pulse laser Methods. Background technique: [0002] In nature, many sciences and technologies currently used by human beings are inspired and enlightened from nature, and super-hydrophobic surfaces are a very common phenomenon in nature. For example, the surface of the lotus leaf has strong hydrophobicity and self-cleaning function. The revelation of the hydrophobicity of the lotus leaf surface to humans is mainly the study of superhydrophobicity, and self-cleaning is the result of superhydrophobicity. Therefore, the preparation of superhydrophobic surfaces on metal materials has attracted more and mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F4/00
Inventor 彼得.班尼特伍义刚赵城刘顿陈列翟中生娄德元杨奇彪吴颖
Owner HUBEI UNIV OF TECH
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