Method for manufacturing stainless steel super-hydrophobic self-cleaning surface through ultra-fast lasers

Abstract

The invention relates to a method for manufacturing a stainless steel super-hydrophobic self-cleaning surface through ultra-fast lasers, and belongs to the technical field of metal base material surface modification. According to the method, firstly, polishing pretreatment is carried out on a stainless steel sample; then, the surface of the sample is cleaned in an ultrasonic cleaning device through deionized water, and the surface of the sample is blow-dried through cold air or is air-dried; the laser processing technology is used, the surface of the sample is treated by adjusting relative process parameters through an ultra-fast laser device, innumerable microstructures are processed in the surface of the sample, the processed sample is placed into an electrically heated drying oven to be baked after processing, and the stainless steel super-hydrophobic self-cleaning surface with nanoscale granulated or flaky or protrusion-shaped structures is obtained. The surface has the self-cleaning function and is excellent in friction resistance and corrosion resistance. The method for manufacturing the stainless steel super-hydrophobic self-cleaning surface through the ultra-fast lasers is simple in process, convenient to operate, high in efficiency, little in energy consumption, low in cost and environmentally friendly, and industrial application is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal substrates, and relates to a surface modification technology of stainless steel substrates. More specifically, the invention relates to a method for preparing a superhydrophobic self-cleaning surface of stainless steel by using an ultrafast laser. Background technique [0002] In nature, there are many plants with outstanding self-cleaning properties on the surface of flowers and leaves. For example, the surface of petals of roses and other plants has very outstanding superhydrophobicity. These properties have very broad application prospects in terms of anti-corrosion and anti-oxidation. , which leads to the application of metal surface wettability in related fields. The wettability of metal materials is a very important feature of metal surfaces. The microstructure and composition of materials affect the wettability of the material surface. The essence of a superhydrophobi...

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Problems solved by technology

The patent with the application number 201310079939.7 discloses a preparation method of an aluminum alloy biomimetic superhydrophobic surface. First, the aluminum alloy is cleaned with absolute ethanol, and then laser processing is performed on the aluminum alloy surface to process countless microscale craters on the surface of the sample. structure, and then immerse the sample in a chemical etching solution to change the morphology of the sample surface. However, this method does not completely break through the traditional chemical etching surface treatment process. After the laser processing process, chemical etching is further used. , and put the chemically etched aluminum alloy sample into a toluene solution containing DTS for modification, and gradually form a low surface energy film on its surface. The treatment process is complicated, and toluene, a highly toxic carcinogen, is easily cause environmental pollution

The patent with the application number 201410657627.4 discloses a super-hydrophobic high-adhesion metal surface and its preparation method. A periodic micro-nano structure with a rose-like surface microstructure is prepared on the metal surface by high-power picosecond or femtosecond laser, and then passed The surface modification of low-free-energy substances realizes the preparation of super-hydrophobic and high-adhesion metal surfaces. This method uses low-surface-energy substances to modify the surface necessary, and the processing efficiency is low; the patent application number 200910183588.8 discloses a bionic metal Super-wetting cross-scale structure design method and preparation method. This method is designed through complex super-hydrophilic theory. The sample to be treated is placed in a high-vacuum chamber and scanned twice at different angles, and finally a surface close to the natural biological surface is obtained. The cross-scale microstructure of the morphology, but this method needs to strictly control various process parameters, the processing cost is too high, and it is completely unsuitable for industrial mass production

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