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Method and device for preparing antifouling and drag-reducing material by laser treatment

A laser treatment and antifouling technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of high environmental pollution, inability to achieve superhydrophilic-superhydrophobic composite wettability, etc., and achieve high flexibility, High-resolution, material-adaptable effects

Pending Publication Date: 2019-10-18
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a method and device for preparing anti-fouling and drag-reducing materials by laser processing. By analyzing the structure and arrangement of each component in the device, the overall flow of the processing method Improve the process design, etc., and use the comprehensive effect of picosecond laser and femtosecond laser to form the surface morphology of superhydrophobic and superhydrophilic materials (that is, superhydrophilic-superhydrophobic surface morphology; of course, hydrophilic-superhydrophilic surface morphology can also be formed. Superhydrophobic, or hydrophobic-superhydrophobic), compared with the existing technology, it can effectively solve the problems of traditional electrochemical corrosion methods that cannot achieve superhydrophilic-superhydrophobic composite wettability, and environmental pollution.

Method used

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  • Method and device for preparing antifouling and drag-reducing material by laser treatment
  • Method and device for preparing antifouling and drag-reducing material by laser treatment
  • Method and device for preparing antifouling and drag-reducing material by laser treatment

Examples

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Effect test

example 1

[0067] Example 1: Preparation of a composite wettable structure on the surface of a copper material

[0068] First use a femtosecond laser with a wavelength of 1030nm, set the power to 80W, the frequency to 2MH, and the scan rate to 5000mm / s, focus on the surface of the copper material, open the dust suction pipe and the protective gas nozzle, and perform high-speed femtosecond laser on the copper surface Etching processing to obtain a micro / nano mixed rough surface; then deposit a layer of low surface energy chemical reagent PFOTS (perfluorodecyltrimethylsilane) on the surface of the micro / nano mixed rough surface area, and deposit it in an oven after deposition Cured at 300°C to obtain a super-hydrophobic surface; finally, a picosecond laser with a wavelength of 532nm was used with a power of 5W, a frequency of 1MH, and a scan rate of 1000mm / s to open the dust suction pipe and the protective gas nozzle to super-hydrophobize the copper material. The hydrophobic surface is sel...

example 2

[0069] Example 2: Fabrication of Composite Wettable Structures on PTFE Surfaces

[0070] First use a femtosecond laser with a wavelength of 355nm, set the power to 50W, the frequency to 1MH, and the scan rate to 1000mm / s, focus on the surface of PTFE, open the dust suction pipe and the protective gas nozzle, and conduct rapid Femtosecond laser etching process to obtain micro / nano hybrid rough surface. Since PTFE itself has a low surface energy, it does not require low surface energy treatment and can be directly processed in the next step. Directly carry out superhydrophilic modification on the surface of PTFE, switch to a 1064nm picosecond laser, set the power to 30W, the frequency to 2MH, and the scanning rate to 2000mm / s. The hydrophobic surface is selectively hydrophilic modified with a linear pattern with a line width of 30 microns and a period ratio of 1:150, and super-hydrophilic regions with specific arrangement and distribution are obtained on the micron scale, final...

example 3

[0071] Example 3: Fabrication of Composite Wetting Structures on Glass Surfaces

[0072] First use a femtosecond laser with a wavelength of 355nm, set the power to 10W, the frequency to 500kHz, and the scanning rate to 200mm / s, focus on the glass surface, turn on the dust suction pipe and the protective gas nozzle, and perform fast femtosecond laser etching on the glass surface to obtain Micro / nano hybrid rough surface. Then deposit a layer of low surface energy chemical agent PDMS (polydimethylsiloxane) on the surface of the processing area, and then cure it in an oven at 300°C to obtain a super-hydrophobic surface. Finally, using a 355nm picosecond laser with a power of 5W, a frequency of 1MH, and a scan rate of 1000mm / s, the superhydrophobic surface of the glass is patterned with a line width of 400 microns and a period ratio of 1 to 200 for selective hydrophilicity. Modification, the specific arrangement and distribution of hydrophilic regions are obtained on the micron s...

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Abstract

The invention belongs to the technical field of laser machining, and discloses a method and a device for preparing an antifouling and drag-reducing material by laser treatment. The device mainly comprises a picosecond laser emitting assembly, a femtosecond laser emitting assembly and a scanning focusing assembly, wherein the femtosecond laser emitting assembly is used for emitting femtosecond laser, so that a micro-nano mixing structure with super hydrophobic performance is formed on the surface of a to-be-treated material; and the picosecond laser emitting assembly is used for emitting picosecond laser, so that the surface of the to-be-treated material forms a super hydrophilic region. According to the invention, the structure of the assemblies in the device and an arrangement mode thereof, the corresponding machining method and the like are improved, and the super hydrophilic-super hydrophobic (hydrophilic-super hydrophobic and hydrophobic-super hydrophobic) material surface topography is formed by utilizing the comprehensive action of the picosecond laser and the femtosecond laser, so that the composite wettability is realized, the drag of the to-be-treated material in water canbe reduced, the antifouling effect is achieved at the same time, and the problems that a traditional electrochemical corrosion method cannot achieve the micro-nano structure of the composite wettability and the environmental pollution is large and the like can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and more specifically relates to a method and device for preparing anti-fouling and drag-reducing materials by laser processing, which can realize the preparation of surface anti-fouling and drag-reducing materials. Background technique [0002] With the improvement of the performance requirements of underwater vehicles and the emphasis on environmental protection, more and more people pay more and more attention to the pollution and friction loss of underwater vehicles. How to prevent pollution and reduce drag has gradually become a hot project. . The purpose of antifouling and drag reduction research is to reduce the pollution and frictional resistance of the aircraft when it moves in the water, reduce energy consumption, and increase the speed and service life of the aircraft. At present, various anti-fouling and drag-reducing theories and methods are emerging, among which the use of...

Claims

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Application Information

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IPC IPC(8): B23K26/362B23K26/046B23K26/70
CPCB23K26/362B23K26/046B23K26/702
Inventor 段军侯国祥陈乔丹邓磊敏
Owner HUAZHONG UNIV OF SCI & TECH
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