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Method and device for preparing bionic super-hydrophobic micro-nano surface through femtosecond laser

A femtosecond laser and super-hydrophobic micro-technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of poor film/coating bonding force, decreased hydrophobic function, poor environmental adaptability, etc., and achieve efficient processing , less consumption of raw materials, low cost effect

Active Publication Date: 2015-05-20
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to propose a method and device for preparing a bionic superhydrophobic micro-nano surface by femtosecond laser, which can overcome the existing problems in the preparation technology of superhydrophobic surface micro-nano structure at home and abroad. The processing range is small, the efficiency is low, it has strong selectivity to the prepared materials, it needs secondary molding, the prepared film / coating has poor bonding force, not impact resistance, poor environmental adaptability and decreased hydrophobic function, etc.

Method used

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  • Method and device for preparing bionic super-hydrophobic micro-nano surface through femtosecond laser
  • Method and device for preparing bionic super-hydrophobic micro-nano surface through femtosecond laser

Examples

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Embodiment 1

[0046] This embodiment provides a device for preparing bionic superhydrophobic micro-nano surface by femtosecond laser, such as figure 1 As shown, the device includes a femtosecond laser unit 1, a beam control unit, a motion platform unit 8 and an automatic control unit (industrial control computer) 9;

[0047] The femtosecond laser unit 1 comprises a femtosecond laser (the MAITI self-mode-locked titanium sapphire laser of American Spectrum Physics Corporation) and a regenerative amplifier (the Spitfire regenerative amplifier of the American Spectrum Physics Corporation), and the femtosecond laser is arranged at the rear of the regenerative amplifier; the present embodiment In , the femtosecond laser and the regenerative amplifier are industrially integrated to form a single unit;

[0048] The beam control unit comprises a half-wave plate 2, a polarization beam splitter 3, a shutter 4, a reflector 5 and an aspheric lens 6; the half-wave plate 2 is arranged in front of the rege...

Embodiment 2

[0056] This example uses the femtosecond laser to prepare the bionic superhydrophobic micro-nano surface device and preparation method, the difference is that the single pulse energy of the femtosecond laser beam is 210 μJ, and at the same time, the step in the x direction is performed first during processing Feed amount, uniform speed movement processing in the y direction, and after the X direction processing is completed, then the step feed amount in the y direction, and uniform speed movement processing in the X direction.

[0057] The preparation method of this embodiment can obtain a cross-shaped superhydrophobic micro-nano surface, which has better superhydrophobic performance.

[0058] Scan the surface of the titanium alloy superhydrophobic micro-nano structure obtained in this embodiment using a scanning electron microscope, as Figure 5 As shown, the measured microstructure period is 100 μm and the depth is 50 μm. The static contact angle of the obtained titanium al...

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Abstract

The invention provides a device for preparing the bionic super-hydrophobic micro-nano surface through femtosecond laser. The device comprises a femtosecond laser unit, a light beam control unit, a motion platform unit and an automatic control unit. The femtosecond laser unit is used for transmitting the femtosecond laser. The light beam control unit is used for controlling power, light beam quality and exposure time of the femtosecond laser. The motion unit is used for controlling the movement amount in the three-dimensional direction of the photo-etched surface. The femtosecond laser unit is arranged behind the light beam control unit. The light beam control unit is arranged above the motion platform unit. The light beam control unit and the motion platform unit are electrically connected with the automatic control unit. The invention further provides a method for preparing the bionic super-hydrophobic micro-nano surface through the femtosecond laser, and the device is adopted in the method. The ablation effect of the femtosecond laser is utilized for forming a micro-nano composite structure similar to the surface of a lotus leaf at a time, secondary modeling is not needed, the process is simple, and the micro-nano structure is stable, good in uniformity and high in hydrophobic function.

Description

technical field [0001] The invention relates to a method and a device for preparing a bionic superhydrophobic micro-nano surface with a femtosecond laser, and belongs to the technical field of material surface treatment. Background technique [0002] It is well known that a direct measure of wettability is the measurement of the static contact angle of a liquid (usually water) on a solid surface. When the static contact angle is greater than 90°, the surface is considered to be a hydrophobic surface; when the contact angle is greater than 150°, the surface is considered to be a superhydrophobic surface. Many species in nature have astonishing abilities and functions, such as geckos walking on walls, superhydrophobic and self-cleaning properties of lotus leaves, etc. Studies have shown that a large part of these extraordinary abilities and functions are The reason for the function is closely related to the surface structure, especially the ordered surface micro-nano structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352B23K26/064B23K26/362B23K26/70
CPCB23K26/0861B23K26/3584
Inventor 王达望马国佳李淑青
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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