Method for preparing super-hydrophobic bionic metal surface through ultrafast laser technology

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...

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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

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