Method for preparing titanium alloy super-hydrophobic anti-frost surface using short pulse laser

Abstract

The invention relates to a method for preparing titanium alloy super-hydrophobic anti-frost surface using short pulse laser, and belongs to the technical field of surface modification on metal base material. The method comprises preprocessing (polishing) a titanium alloy sample, washing the surface of the sample in an ultrasonic cleaner using deionized water, drying the sample through cold air or airing the sample after the sample is cleaned up, treating the surface of the sample through a short pulse laser after related parameters are adjusted (the laser processing technology), making countless microstructures in the surface of the sample, putting the processed sample into an electrothermal drying box to be roasted after the sample is processed, to obtain the titanium alloy super-hydrophobic anti-frost surface. The surface has micron order papilla structures or crack structures, so the surface is excellent in super-hydrophobic performance and anti-frost performance. The method is simple in technology, convenient to carry out, high in efficiency, low in energy consumption, low in cost and environmental friendly, so the method can be easily applied to industrial application.

Description

Technical field: [0001] The invention belongs to the technical field of surface modification of metal substrates, and relates to a method for preparing a superhydrophobic frost-resistant surface on a titanium alloy substrate. More specifically, the invention relates to a method for preparing a superhydrophobic frost-resistant surface of a titanium alloy by using a short pulse laser . Background technique: [0002] After hundreds of millions of years of selection and evolution, animals and plants in nature have their own unique way of living. The super-hydrophobic self-cleaning surface is one of them: the body surface of weak insects can fly in the rain due to its super-hydrophobic function; Due to the super-hydrophobic micro-nano structure on the feet of water spiders, it can crawl on the water surface almost without resistance; the super-hydrophobic structure on the surface of lotus leaves greatly improves its self-cleaning function; the petal surfaces of plants such as ros...

AI Technical Summary

Problems solved by technology

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 superhydrophobic and high adhesion metal surfaces. This method uses low surface energy substances to modify the surface necessary, and the processing efficiency is low; for example, a patent application with application number 201410788477.0 discloses A method for preparing a superhydrophobic micro-nano structure on the surface of a titanium alloy. First, the titanium alloy sample is ultrasonically cleaned with acetone and absolute alcohol to obtain a titanium alloy sample with a clean surface; Photolithography processing, one step to obtain titanium alloy samples with grating-type or well-type or circular blind-hole superhydrophobic micro-nano-structured surfaces. Although femtosecond lasers can be used to process very precise micro-structured surfaces, this simple method Nor can it cover up the inherent shortcomings of femtosecond lasers, such as extremely expensive, low processing efficiency, and harsh processing environments

The patent application number 200910183588.8 discloses a design method and preparation method of a bionic metal superwetting cross-scale structure. This method is designed through a complex superhydrophilic theory. The sample to be treated is placed in a high vacuum chamber, and the Two scans are carried out to obtain a cross-scale microstructure close to the natural biological surface morphology. However, this method needs to strictly control various process parameters, and the processing cost is too high, which is completely unsuitable for industrial mass production.

Images