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A method for preparing metal superhydrophobic biomimetic surface using ultrafast laser technology

An ultra-fast laser and super-hydrophobic technology, which is applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problem of not considering the influence of super-hydrophobic performance, not combining drag reduction morphology, and not considering how to design super-hydrophobic bionic surfaces To achieve the effect of enhancing moisture-proof and anti-icing capabilities, reducing droplet retention, and improving drag reduction capabilities

Active Publication Date: 2019-11-12
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology

The influence of fluid on the superhydrophobic properties of this surface is also not considered.
[0005] Based on the current closely related patents and literature, the technology of ultrafast laser micro-nano processing of metals is scanned by linear polarization. The prepared micro-nano structures are all typical superhydrophobic shapes such as lotus leaf papillae or roses. How to design this super-hydrophobic biomimetic surface in the fluid environment is not considered, and it does not combine drag-reducing shapes such as shark skin or dolphin skin

Method used

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  • A method for preparing metal superhydrophobic biomimetic surface using ultrafast laser technology
  • A method for preparing metal superhydrophobic biomimetic surface using ultrafast laser technology
  • A method for preparing metal superhydrophobic biomimetic surface using ultrafast laser technology

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specific Embodiment approach

[0029] A specific embodiment of the method for preparing a metal superhydrophobic bionic surface using ultrafast laser technology in the present invention: a method for preparing a superhydrophobic micro-nano structure and a "groove" on an aluminum alloy using a femtosecond laser Drag reduction microstructure composite biomimetic surface method:

[0030] (1) Grind the aluminum alloy samples to be processed with different types of sandpaper in the order of small to large (400#, 800#, 2000#), and then use a polishing cloth to polish until the sample has a relatively bright metallic color;

[0031] (2) Clean the polished aluminum alloy sample in an ultrasonic cleaner filled with deionized water or alcohol solution for 30 minutes. After cleaning, dry the surface with cold air to obtain a clean aluminum alloy sample;

[0032] (3), such as figure 1 As shown, replace the femtosecond laser with a circular polarizing filter, perform laser-induced processing on the aluminum alloy samp...

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Abstract

The invention discloses a method for preparing a super-hydrophobic bionic metal surface through an ultrafast laser technology and relates to the technical field of bionic surface manufacturing. The method comprises the following steps that a metal sample is subjected to mechanical grinding and polishing; the metal sample is subjected to ultrasonic cleaning; ultrafast laser is replaced with a circular polarization glass filter, and then micro-nano structure induction processing is conducted; the metal sample is subjected to anti-dragging micro-structure processing; and the processed metal sample is subjected to ultrasonic cleaning, placed in a fluoroalkyl silane liquid solution for soaking, and taken out to be blown-dried. According to the method, the surface integrating super-hydrophobic and anti-dragging features is successfully prepared by fully utilizing the characteristics of a femtosecond laser micro-nano processing technology, retention of water drops on the metal surface in theflight environment is reduced to the greatest extent, and thus the dampproof and anti-icing effects are maximized.

Description

technical field [0001] The invention relates to the technical field of bionic surface manufacturing, in particular to a method for preparing a metal superhydrophobic bionic surface by using ultrafast laser technology. Background technique [0002] If the metal surface has super-hydrophobic function, it will have great potential in the application of waterproof, moisture-proof, anti-corrosion and anti-ice and snow. Some animal and plant skins in nature have given us important inspiration. These skins have super-hydrophobic, self-cleaning and Drag reduction and other functions. Studies have shown that fish swimming in water or birds flying in the air have low resistance and low noise characteristics, and have super-hydrophobic characteristics, which are closely related to the morphology of the surface of organisms. Typical biological epidermis such as shark skin structure, its surface is a neatly arranged groove-like structure on the macroscopic view, and when it is further e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/352B23K26/00
CPCB23K26/352
Inventor 马国佳张伟刘星孙刚张晓兵
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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