Titanium alloy super hydrophobic-super hydrophilic surface and preparing method and application of titanium alloy super hydrophobic-super hydrophilic surface
A super-hydrophobic surface, super-hydrophilic technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of limited condensation efficiency of condensation equipment, low femtosecond laser processing efficiency, and unsuitable for large-scale application, etc. Excellent superhydrophobicity, accelerated condensation heat transfer efficiency, easy control of process parameters
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[0028] Embodiments of the present invention also provide a method for preparing a titanium alloy superhydrophobic-superhydrophilic surface, comprising the following steps:
[0029] (1) Using pulsed laser scanning to process the pretreated titanium alloy surface into a super-hydrophilic surface;
[0030] (2) baking the super-hydrophilic surface treated in step (1) to obtain a super-hydrophobic surface;
[0031] (3) Use pulsed laser to scan the superhydrophobic surface in step (2) to process multiple superhydrophobic regions and multiple superhydrophilic regions alternately arranged in wedge-shaped or triangular sub-arrays, and each sub-array is distributed with superhydrophobic Hydrophilic pooling area, that is, a super-hydrophobic-super-hydrophilic surface.
[0032] In the present invention, the required structural pattern can be compiled on the surface of the superhydrophobic region in step (2), and then the structural pattern can be processed by pulsed laser scanning, so th...
Embodiment 1
[0054] This embodiment provides a method for preparing a titanium alloy superhydrophobic-superhydrophilic surface, comprising the following steps:
[0055] (1) Use a metallographic sample pre-grinder with a power of 370W, a grinding disc speed of 450 rpm, and a grinding disc diameter of 230 mm to polish the surface of the titanium alloy to be treated. During the polishing process, the auxiliary diameter is 200 mm, 1200 Purpose SiC water sandpaper is used to polish the surface of titanium alloy, and the polishing range is 100cm 2 , the polishing time was 10 minutes, and the titanium alloy after the surface polishing was obtained; then the titanium alloy after the surface polishing was cleaned with an ultrasonic cleaner, and the ultrasonic frequency of the ultrasonic cleaner was 40kHz, and the deionized water with a resistivity of 18.25 megohms was used first Submerge the surface of the titanium alloy, wash continuously at room temperature for 25 minutes, and then wash with etha...
Embodiment 2
[0061] This embodiment provides a method for preparing a titanium alloy superhydrophobic-superhydrophilic surface, comprising the following steps:
[0062] (1) Using the same method as in Example 1 to pretreat the surface of the titanium alloy to obtain a clean titanium alloy sample;
[0063] (2) Use a short pulse laser to scan the clean titanium alloy sample in step (1), and process a super-hydrophilic surface with numerous microstructures on the surface of the titanium alloy sample. The wavelength of the laser is 1064nm, and the pulse width of the laser is 240ns. The single pulse energy is 0.40mJ, and the repetition frequency is 137kHz; the moving platform device is used for laser scanning, the clean titanium alloy sample obtained in step (1) is fixed on the moving working platform, and the laser beam is focused on the sample by using a lens, so that The surface of the titanium alloy sample moves along the x, y, and z three-dimensional directions relative to the focused etch...
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