A process for preparing superhydrophobic surfaces of titanium alloy plates using ethanol-assisted laser processing

Abstract

This invention provides a process for preparing a superhydrophobic surface of a titanium alloy plate using a laser assisted flow of ethanol. The process involves: rough milling the surface of the titanium alloy plate to remove the oxide layer; introducing flowing ethanol onto the milled surface; using a laser to pass through the flowing ethanol to fabricate a grid structure framework on the titanium alloy plate surface; removing impurities from the surface of the titanium alloy plate; and then modifying it with fluorosilane and performing heat treatment to achieve the superhydrophobic surface. This invention improves the hydrophobicity of the titanium alloy plate, making it easier to achieve superhydrophobicity, reducing water flow resistance, and improving water transport efficiency. Furthermore, this process is cost-effective, easy to control, and allows for stable automated production.

Description

Technical Field

[0001] This invention relates to the field of laser processing technology, and more specifically, to a process for preparing superhydrophobic surfaces of titanium alloy plates using a laser assisted by flowing ethanol. Background Technology

[0002] Titanium alloy plates are widely used in rainwater harvesting systems due to their high strength, corrosion resistance, and oxidation resistance. Since water flow in rainwater harvesting systems is affected by the resistance at the contact surfaces, thus reducing water transport efficiency, it is necessary to treat the surface of the titanium alloy plates with superhydrophobic material to reduce the adhesion of water to the contact surfaces and further improve water collection efficiency.

[0003] Currently, superhydrophobic titanium alloy plates are typically manufactured by altering the microstructure and chemical composition of the titanium alloy plate surface through surface roughening, surface chemical treatment, surface modification, heat treatment, and bio-activation treatment. However, these methods are costly, difficult to process, and unsuitable for mass production. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of existing technologies and provide a process for preparing superhydrophobic surfaces of titanium alloy plates using flowing ethanol-assisted laser processing. This process can improve the hydrophobicity of titanium alloy plates, making it easier for the surface of the titanium alloy plates to achieve superhydrophobicity, and reducing water flow resistance, thereby improving water transport efficiency. Furthermore, this process results in low manufacturing costs, ease of control, and the ability to achieve stable automated production.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a process for preparing a superhydrophobic surface of a titanium alloy plate using a laser with flowing ethanol, characterized in that: the surface of the titanium alloy plate is rough milled to remove the surface oxide layer; flowing ethanol is introduced onto the surface of the rough-milled titanium alloy plate; a grid structure skeleton is processed on the surface of the titanium alloy plate using a laser through the flowing ethanol; impurities on the surface of the titanium alloy plate are removed, and the superhydrophobic surface of the titanium alloy plate is prepared by fluorosilane modification and heat treatment.

[0006] In the above scheme, the ethanol-assisted processing can increase the carbon content on the surface of the titanium alloy plate. Carbon is a non-polar substance, which can improve the hydrophobicity of the titanium alloy plate, making it easier for the surface of the titanium alloy plate to achieve superhydrophobicity, reducing water flow resistance, and improving water transport efficiency. In addition, this process is low in manufacturing cost, easy to control, and can achieve stable automated production.

[0007] Includes the following steps:

[0008] The first step is to use a CNC milling machine to rough mill the surface of the titanium alloy plate to remove the surface oxide layer;

[0009] The second step is to install an ethanol flow device on the surface of the rough-milled titanium alloy plate.

[0010] The third step involves using an ethanol flow device to input ethanol at one end of the rough-milled titanium alloy plate surface and discharge ethanol from the other end, so that ethanol can cover the rough-milled titanium alloy plate surface and achieve ethanol flow on the rough-milled titanium alloy plate surface.

[0011] The fourth step involves using a laser to pass through flowing ethanol to process a grid structure framework on the surface of a titanium alloy plate. During the laser processing, the flowing ethanol confines the plasma generated during laser processing to the surface of the rough-milled titanium alloy plate, increasing the number of nanoparticles on the surface and creating a superhydrophobic surface. At the same time, the flowing ethanol carries away the air bubbles generated during laser processing.

[0012] The fifth step is to use ultrasonic cleaning to clean the surface of the titanium alloy plate to remove impurities;

[0013] The sixth step involves modifying the surface of the titanium alloy plate with fluorosilane and then performing heat treatment.

[0014] In the second step, the ethanol flow device includes a hollow box, a pumping component, a pipeline, and two containers for storing ethanol. The hollow box is made of transparent material and is set on the surface of a titanium alloy plate. The two containers are respectively connected to the input and output ends of the hollow box through pipelines, and the pumping component is set between the container and the input end of the hollow box.

[0015] The hollow box is a cuboid composed of five connected panels and has a receiving space; the hollow box is covered by a titanium alloy plate through the receiving space; the five panels are transparent panels.

[0016] The five panels consist of four acrylic panels and one quartz glass panel. When the hollow box is placed on the surface of the titanium alloy plate, the four acrylic panels serve as the side panels of the hollow box, and the quartz glass panel serves as the top panel of the hollow box, located above the surface of the titanium alloy plate. The quartz glass panel of this invention allows the laser to pass through without significant energy loss. Furthermore, the acrylic panels are transparent, facilitating external observation of the laser processing process.

[0017] A sealing gasket is installed at the junction of the hollow box and the titanium alloy plate surface to prevent ethanol leakage.

[0018] In the first step, the surface of the titanium alloy plate is rough milled using a cylindrical end mill with a diameter of 16mm. The cutting parameters for the last step of rough milling are: feed rate of 200mm / min, spindle speed of 1000rpm, and depth of cut of 0.1mm.

[0019] In the fourth step, the laser processing parameters are: average power is 20W, defocus is 0mm, repetition frequency is 20kHz, scanning speed is 160mm / s, scanning line spacing is 0.01mm, number of scans is 10, and the scanning path is a zigzag shape.

[0020] In the fifth step, the titanium alloy plate is cleaned with an ultrasonic wave at a frequency of 28 kHz for 30 minutes to remove impurities from the surface of the titanium alloy plate.

[0021] In the sixth step, the surface of the titanium alloy plate is modified with fluorosilane. The concentration of the fluorosilane ethanol solution is 0.5% (w / w). The fluorosilane ethanol solution is spread on the surface of the titanium alloy plate using a microinjector. After the fluorosilane ethanol solution on the surface of the titanium alloy plate is completely air-dried, heat treatment is performed. The heat treatment is as follows: heat treatment in a constant temperature oven for 30 minutes at a temperature of 120°C.

[0022] This invention utilizes flowing ethanol to assist processing, which can increase the carbon content on the surface of titanium alloy plates. Carbon, being a non-polar substance, enhances the hydrophobicity of the titanium alloy plates. The ethanol flow device of this invention reduces ethanol evaporation and waste, and confines the plasma generated during laser processing to the surface of the titanium alloy plate. Due to the recoil effect, the surface morphology of the titanium alloy plate becomes more diverse, and more nanoparticles are generated. The increased number of nanoparticles on the surface of the titanium alloy plate increases the porosity of the solid-liquid contact and increases roughness. Both increased porosity and increased roughness contribute to achieving superhydrophobicity on the titanium alloy plate surface.

[0023] In addition, the flowing ethanol can carry away the air bubbles generated during laser processing, preventing them from affecting the laser processing and further improving the quality of the superhydrophobic surface formed by laser processing on titanium alloy plates.

[0024] Compared with existing technologies, the present invention has the following advantages and beneficial effects: The process of preparing superhydrophobic surfaces of titanium alloy plates using flowing ethanol-assisted laser processing can improve the hydrophobicity of titanium alloy plates, making it easier for the surface of titanium alloy plates to achieve superhydrophobicity, reducing water flow resistance, and improving water transport efficiency. Furthermore, this process results in low manufacturing costs, ease of control, and the ability to achieve stable automated production. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow of ethanol according to the present invention.

[0026] Figure 2 This is a schematic diagram of the ethanol flow device of the present invention;

[0027] Figure 3 This is a schematic diagram of the hollow box body in the ethanol flow device of the present invention.

[0028] Figure 4 This is a schematic diagram of the grid structure processed on the surface of a titanium alloy plate using the process of this invention;

[0029] Among them, 1 is the laser, 2 is the ethanol flow device, 3 is the titanium alloy plate, 4 is the workbench, 5 is the container, 6 is the self-priming pump, 7 is the quartz glass panel, 8 is the sealing gasket, and 9 is the acrylic panel. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] Example

[0032] like Figures 1 to 4 As shown, the process for preparing a superhydrophobic surface of a titanium alloy plate using a flowing ethanol-assisted laser according to the present invention is as follows: rough milling of the surface of the titanium alloy plate 3 to remove the surface oxide layer; placing the rough-milled titanium alloy plate 3 on a worktable 4, and introducing flowing ethanol onto the surface of the rough-milled titanium alloy plate 3; using the laser of the laser 1 to pass through the flowing ethanol to process a grid structure skeleton on the surface of the titanium alloy plate 3; removing impurities from the surface of the titanium alloy plate 3, and then modifying it with fluorosilane and heat treatment to achieve the preparation of the superhydrophobic surface of the titanium alloy plate 3.

[0033] Specifically, the following steps are included:

[0034] The first step is to rough mill the surface of the titanium alloy plate 3 using a CNC milling machine to remove the surface oxide layer. The rough milling of the titanium alloy plate 3 is performed using a 16mm diameter cylindrical end mill. The cutting parameters for the final step of the rough milling are: feed rate of 200mm / min, spindle speed of 1000rpm, and depth of cut of 0.1mm.

[0035] The second step is to install an ethanol flow device on the surface of the rough-milled titanium alloy plate.

[0036] The ethanol flow device includes a hollow box, a self-priming pump 6, pipes, and two containers 5 for storing ethanol. The hollow box is made of transparent material and is mounted on the surface of a titanium alloy plate 3. The two containers 5 are connected to the input and output ends of the hollow box through pipes, respectively. The self-priming pump 6 is located between the container 5 and the input end of the hollow box.

[0037] The hollow box in this embodiment is a cuboid composed of five interconnected panels, with an accommodating space. The hollow box is mounted on a titanium alloy plate 3 through this space, and the five panels are transparent. Specifically, the five panels consist of four acrylic panels 9 and one quartz glass panel 7. When the hollow box is placed on the surface of the titanium alloy plate 3, the four acrylic panels 9 serve as the side panels, and the quartz glass panel 7 serves as the top panel, positioned above the surface of the titanium alloy plate 3. The quartz glass panel 7 of this invention allows laser light to pass through without significant energy loss. Furthermore, sealing gaskets 8 are provided at the junctions between the four acrylic panels 9 and the surface of the titanium alloy plate 3 to prevent ethanol leakage.

[0038] The third step involves introducing ethanol into one end of the rough-milled titanium alloy plate 3 through the ethanol flow device 2 and discharging ethanol from the other end, so that the ethanol can cover the surface of the rough-milled titanium alloy plate 3 and achieve the flow of ethanol on the surface of the rough-milled titanium alloy plate 3.

[0039] The fourth step involves using the laser from laser 1 to pass through flowing ethanol to process a grid structure framework on the surface of titanium alloy plate 3. During the laser processing, the flowing ethanol confines the plasma generated during the laser processing to the surface of the rough-milled titanium alloy plate 3, thereby increasing the number of nanoparticles on the surface of the rough-milled titanium alloy plate 3 and achieving the formation of a superhydrophobic surface on the titanium alloy plate. At the same time, the flowing ethanol carries away the bubbles generated during the laser processing.

[0040] The laser processing parameters are as follows: average power is 20W, defocus is 0mm, repetition frequency is 20kHz, scanning speed is 160mm / s, scanning line spacing is 0.01mm, number of scans is 10, and the scanning path is a zigzag pattern.

[0041] Fifth step: Clean the titanium alloy plate with an ultrasonic wave at a frequency of 28kHz for 30 minutes to remove impurities from the surface of the titanium alloy plate 3.

[0042] Step 6: Modify the surface of the titanium alloy plate with fluorosilane. The concentration of the fluorosilane ethanol solution is 0.5% (w / w). Spread the fluorosilane ethanol solution on the surface of the titanium alloy plate 3 using a microinjector. After the fluorosilane ethanol solution on the surface of the titanium alloy plate 3 is completely air-dried, perform heat treatment. The heat treatment is as follows: place it in a constant temperature oven for 30 minutes at a temperature of 120°C.

[0043] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow of ethanol, characterized in that, Includes the following steps: The first step is to use a CNC milling machine to rough mill the surface of the titanium alloy plate to remove the surface oxide layer; The second step is to install an ethanol flow device on the surface of the rough-milled titanium alloy plate. The third step involves using an ethanol flow device to input ethanol at one end of the rough-milled titanium alloy plate surface and discharge ethanol from the other end, so that ethanol can cover the rough-milled titanium alloy plate surface and achieve ethanol flow on the rough-milled titanium alloy plate surface. The fourth step involves using a laser to pass through flowing ethanol to process a grid structure framework on the surface of a titanium alloy plate. During the laser processing, the flowing ethanol confines the plasma generated during laser processing to the surface of the rough-milled titanium alloy plate, increasing the number of nanoparticles on the surface and creating a superhydrophobic surface. At the same time, the flowing ethanol carries away the air bubbles generated during laser processing. The fifth step is to use ultrasonic cleaning to clean the surface of the titanium alloy plate to remove impurities; The sixth step involves modifying the surface of the titanium alloy plate with fluorosilane and then performing heat treatment. In the second step, the ethanol flow device includes a hollow box, a pumping component, a pipeline, and two containers for storing ethanol. The hollow box is made of transparent material and is set on the surface of a titanium alloy plate; two containers are connected to the input and output ends of the hollow box through pipes respectively, and a pumping component is set between the container and the input end of the hollow box.

2. The process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow ethanol according to claim 1, characterized in that: The hollow box is a cuboid composed of five connected panels and has a receiving space; the hollow box is covered by a titanium alloy plate through the receiving space; the five panels are transparent panels.

3. The process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow ethanol according to claim 2, characterized in that: The five panels consist of four acrylic panels and one quartz glass panel. When the hollow box is placed on the surface of the titanium alloy plate, the four acrylic panels serve as the side panels of the hollow box, and the quartz glass panel serves as the top panel of the hollow box and is located above the surface of the titanium alloy plate.

4. The process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow ethanol according to claim 1, characterized in that: A sealing gasket is installed at the junction of the hollow box and the titanium alloy plate surface to prevent ethanol leakage.

5. The process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow ethanol according to claim 1, characterized in that: In the first step, the surface of the titanium alloy plate is rough milled using a cylindrical end mill with a diameter of 16 mm. The cutting parameters for the last step of rough milling are: feed rate of 200 mm / min, spindle speed of 1000 rpm, and depth of cut of 0.1 mm.

6. The process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow ethanol according to claim 1, characterized in that: In the fourth step, the laser processing parameters are: average power is 20 W, defocusing amount is 0 mm, repetition frequency is 20 kHz, scanning speed is 160 mm / s, scanning line spacing is 0.01 mm, number of scans is 10, and the scanning path is a zigzag pattern.

7. The process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow ethanol according to claim 1, characterized in that: In the fifth step, the titanium alloy plate is cleaned with ultrasonic waves at a frequency of 28 kHz for 30 minutes to remove impurities from the surface of the titanium alloy plate.

8. The process for preparing superhydrophobic surfaces of titanium alloy plates using laser-assisted flow ethanol according to claim 1, characterized in that: In the sixth step, the surface of the titanium alloy plate is modified with fluorosilane. The concentration of the fluorosilane ethanol solution is 0.5% (w / w). The fluorosilane ethanol solution is spread on the surface of the titanium alloy plate using a microinjector. After the fluorosilane ethanol solution on the surface of the titanium alloy plate is completely air-dried, heat treatment is performed. The heat treatment is as follows: heat treatment in a constant temperature oven for 30 min at an oven temperature of 120 ℃.

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