Ultrafast laser preparation method facing bacteriostatic surfaces of public goods

An ultra-fast laser and article technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of poor wear resistance of antibacterial materials, unsatisfactory antibacterial effect, and reduced bacterial adhesion, etc., and achieve a processing method. Flexible, fast processing, small heat-affected zone effect

Inactive Publication Date: 2020-10-16
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology mainly reduces the adhesion of bacteria by preparing antibacterial coatings and coating them on the surface of materials. However, the antibacterial materials prepared by this method have poor wear resistance, which will cause antibacterial coatings after long-term use. The peeling of the layer, the antibacterial effect is not ideal

Method used

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  • Ultrafast laser preparation method facing bacteriostatic surfaces of public goods
  • Ultrafast laser preparation method facing bacteriostatic surfaces of public goods
  • Ultrafast laser preparation method facing bacteriostatic surfaces of public goods

Examples

Experimental program
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preparation example Construction

[0023] like figure 1 As shown, an ultrafast laser preparation method for the antibacterial surface of public goods mainly includes the following steps:

[0024] (1) The surface of the material is mechanically polished, and after polishing, ultrasonic cleaning and drying are performed.

[0025] (2) Place the processed material in the first step on an ultrafast laser processing platform, adjust the laser beam to make its focus on the surface of the sample, set the laser process parameters, and process to obtain a micro-nano structure surface with bacteriostatic properties.

[0026] (3) Wash and dry the processed material.

[0027] Wherein, the laser process parameters described in step (2) are specifically: the laser wavelength is 193nm-1070nm, the laser pulse width is 50fs-50ns, the pulse frequency is 1kHz-1MHz, the laser power is 1W-2000W, and the scanning speed is 1mm / s -5000mm / s.

[0028] Wherein, the micro-nano structure in step (2) is a pit array structure, a groove str...

Embodiment 1

[0033] (1): Take a titanium alloy sample with a thickness of 2 mm and polish it to 1200 mesh, place it in anhydrous alcohol for ultrasonic cleaning for 5 minutes, and dry it.

[0034] (2): Place the polished and cleaned sample on the workbench of the femtosecond laser processing system (wavelength 1064nm), set the laser power to 6W, the pulse width to 500fs, the frequency to be 800KHz, the scanning speed to be 800mm / s, and the scanning distance to be 800mm / s. It is 70 μm, the number of scans is 6 times, the laser processing system is started to start processing, and the LIPSS structure is obtained.

[0035] (3): Use anhydrous alcohol to clean the processed titanium alloy sample and dry it.

Embodiment 2

[0037] (1): Take a stainless steel sample with a thickness of 2 mm and polish it to 1200 mesh, place it in anhydrous alcohol for ultrasonic cleaning for 5 minutes, and dry it.

[0038] (2): Place the polished and cleaned sample on the workbench of the femtosecond laser processing system (wavelength 1064nm), set the laser power to 8W, the pulse width to 500fs, the frequency to be 500KHz, the scan speed to be 600mm / s, and the scan spacing to be 600mm / s. It is 60 μm, the number of scans is 10 times, the laser processing system is started to start processing, and the pit array structure is obtained.

[0039] (3): Use anhydrous alcohol to clean the processed stainless steel samples and dry them.

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Abstract

The invention discloses an ultrafast laser preparation method facing bacteriostatic surfaces of public goods. A micro-nano structure is prepared on the surface of a cleaned and polished material by using ultrafast laser, so that the functional surface with bacteriostatic performance can be obtained. The method is simple and convenient to operate, high in processing efficiency and wide in application field, the bacteriostatic surfaces prepared by the method are applied to daily articles commonly used in public places, bacterial adhesion on the surfaces of the articles can be obviously reduced,and long-acting bacteriostasis of the daily articles in public places is realized.

Description

technical field [0001] The invention relates to an ultrafast laser preparation method for the antibacterial surface of public goods, and belongs to the technical field of laser surface processing. Background technique [0002] Infectious diseases have always been an important enemy that threatens human security. With the development of globalization, the improvement of transportation capacity, and the more frequent flow of people, conditions have been created for the global outbreak of infectious diseases. The outbreak of new coronary pneumonia has drawn people's attention to public health and infectious disease prevention. Contact transmission is an important transmission route of infectious diseases, which often occurs in public environments. In public places, some shared items are often touched, such as door handles, faucet switches, etc. When people use these items, it is easy to cause the spread of bacteria, viruses and other pathogens, causing the spread of infectiou...

Claims

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Application Information

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IPC IPC(8): B23K26/352B23K26/60B23K26/70
CPCB23K26/60B23K26/702B23K26/355
Inventor 管迎春崔智铨
Owner BEIHANG UNIV
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