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A method of preparing copper-based superlyophobic self-cleaning surface by ultrafast laser

An ultra-fast laser and super-lyophobic technology, applied in laser welding equipment, manufacturing tools, welding equipment, etc., to achieve the effect of increasing complexity, low price, and improving super-lyophobic performance

Active Publication Date: 2021-12-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of micro-nano-scale processing method, ultrafast laser has excellent material universality. In recent years, it is not uncommon to use pulsed laser or ultrafast pulsed laser to prepare micro-nanostructures and surface chemical low free energy modification to achieve superhydrophobicity. There are few patents and literature reports, but it still stays in the preparation of super-hydrophobic surfaces, and it cannot achieve lyophobicity for most other liquids such as oil, and there are defects in industrial applications

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  • A method of preparing copper-based superlyophobic self-cleaning surface by ultrafast laser
  • A method of preparing copper-based superlyophobic self-cleaning surface by ultrafast laser
  • A method of preparing copper-based superlyophobic self-cleaning surface by ultrafast laser

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Embodiment 1

[0028] Embodiment 1, a kind of method utilizing ultrafast laser to prepare copper-based super-lyophobic self-cleaning surface, comprises the following steps:

[0029] 1) Using metal copper as the base material, use 200#, 400#, 800#, 1000# and 1500# metallographic sandpaper to polish the surface of the copper-based sample step by step, and perform polishing treatment, and finally place them in absolute ethanol Ultrasonic cleaning with deionized water for 10 minutes, and drying in soft air flow after taking out;

[0030] 2) Process the copper polished sample obtained in step 1) with an ultrafast laser, the laser wavelength is 1030nm, the pulse width is 240fs, and the diameter of the laser beam waist spot is 35 μm; adjust the laser repetition frequency, laser energy, scanning speed and number of repetitions, Obtain the process parameters of laser preparation of microcones, secondary grids and nanoparticles: repetition frequency 200kHz, laser energy 6W, scanning speed 100mm / s, rep...

Embodiment 2

[0035] Embodiment 2, a kind of method utilizing ultrafast laser to prepare copper-based super-lyophobic self-cleaning surface, comprises the following steps:

[0036] 1) Using metal copper as the base material, use 200#, 400#, 800#, 1000# and 1500# metallographic sandpaper to polish the surface of the copper-based sample step by step, and perform polishing treatment, and finally place them in absolute ethanol Ultrasonic cleaning with deionized water for 10 minutes, and drying in soft air flow after taking out;

[0037] 2) Process the copper polished sample obtained in step 1) with an ultrafast laser, the laser wavelength is 1030nm, the pulse width is 240fs, and the diameter of the laser beam waist spot is 35 μm; adjust the laser repetition frequency, laser energy, scanning speed and number of repetitions, Obtain the process parameters of laser preparation of microcones, secondary grids and nanoparticles: repetition frequency 200kHz, laser energy 6W, scanning speed 100mm / s, rep...

Embodiment 3

[0042] Embodiment 3, a kind of method utilizing ultrafast laser to prepare copper-based super-lyophobic self-cleaning surface, comprises the following steps:

[0043] 1) Using metal copper as the base material, use 200#, 400#, 800#, 1000# and 1500# metallographic sandpaper to polish the surface of the copper-based sample step by step, and perform polishing treatment, and finally place them in absolute ethanol Ultrasonic cleaning with deionized water for 10 minutes, and drying in soft air flow after taking out;

[0044] 2) Process the copper polished sample obtained in step 1) with an ultrafast laser, the laser wavelength is 1030nm, the pulse width is 240fs, and the diameter of the laser beam waist spot is 35 μm; adjust the laser repetition frequency, laser energy, scanning speed and number of repetitions, Obtain the process parameters of laser preparation of microcones, secondary grids and nanoparticles: repetition frequency 200kHz, laser energy 6W, scanning speed 100mm / s, rep...

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Abstract

A method for preparing a copper-based super-lyophobic self-cleaning surface using an ultrafast laser. The copper-based super-lyophobic self-cleaning surface includes micro-cones periodically distributed on the copper-based surface, and secondary grids are distributed between the micro-cone structures , densely grown nanoparticles are distributed on the surface of the microcone, and the microcone, secondary grid, and nanoparticles constitute a three-dimensional three-dimensional micro-nano structure; the method is to pre-polish the surface of the copper sample, and then use an ultrafast laser to polish The pretreated copper polished sample is processed, and the processing path of multi-spot group is planned to realize the one-step preparation of three-dimensional three-level micro-nano structure and the regulation of the micro-cone spacing; finally, use the deep plasma etching machine to use C 4 f 8 The gas is used to modify the processed copper-based samples with low surface energy to obtain a copper-based super-lyophobic self-cleaning surface with a three-dimensional three-level micro-nano structure; Realize super-lyophobic properties for a variety of liquids.

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal substrates, and in particular relates to a method for preparing a copper-based super-lyophobic self-cleaning surface by using an ultrafast laser. Background technique [0002] Nature has formed many strange phenomena in the long-term biological evolution, one of which is the super-hydrophobic phenomenon. Common natural super-hydrophobic surfaces include lotus leaves, mosquito compound eyes, butterfly wings, etc. In the general definition, a superhydrophobic surface refers to a surface with a contact angle > 150° and a rolling angle < 10°. Due to its extremely low rolling angle and adhesion, it has strong self-cleaning properties; in addition, The superhydrophobic surface also has good anti-icing performance, waterproof and anti-fog, drag reduction performance, etc., so it has received extensive attention and research. However, since there are a lot of other liquids in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/352B23K26/60C23F4/00
CPCC23F4/00B23K26/355B23K26/60
Inventor 王文君张祎霖梅雪松孙小云陈同崔健磊
Owner XI AN JIAOTONG UNIV
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