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Femtosecond laser ablation-surface coating combined processing method for super-hydrophobic surface

A super-hydrophobic surface and femtosecond laser technology, applied in laser welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of time-consuming, weak stability, single function of super-hydrophobic structure, etc., to achieve strong stability, High processing precision, fast and efficient preparation

Pending Publication Date: 2022-03-22
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0007] (1) The processing speed of femtosecond laser micro-nano structure is slow and time-consuming, so it is very important to improve its processing efficiency;
[0008] (2) The superhydrophobic structure has a single function and weak stability, which cannot meet the needs of practical applications

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  • Femtosecond laser ablation-surface coating combined processing method for super-hydrophobic surface
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  • Femtosecond laser ablation-surface coating combined processing method for super-hydrophobic surface

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Embodiment Construction

[0032] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] A composite processing method of femtosecond laser ablation-surface coating on a super-hydrophobic surface, the flow chart of which is as follows figure 1 shown.

[0034] First, through FDTD software simulation, parameters such as femtosecond laser energy density, laser polarization state, and laser scanning distance are determined. In the actual processing process, as the laser pulse energy increases, the contact angle first increases and then decreases; therefore, the optimal pulse energy range for processing superhydrophobic surfaces is between 275 μJ and 325 μJ. Under the condition of the most suitable laser pulse energy, the change of the contact angle caused by changing the scanning speed and laser polarization state is not obvious. When the scanning speed is 0.8mm / s, the surface contac...

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Abstract

The invention discloses a femtosecond laser ablation-surface coating combined machining method for a super-hydrophobic surface, and belongs to the technical field of photoelectricity. The method comprises the following steps: firstly, etching the surface of a substrate material sample by femtosecond pulse laser to obtain a material sample with a micro-nano array surface; and then coating a layer of low-energy-state hydrophobic film on the material sample with the micro-nano array surface to obtain the low-energy-state hydrophobic film-micro-nano array structure surface composite material, thereby realizing the comprehensive hydrophobic performance of physical hydrophobic and chemical hydrophobic. According to the method, the femtosecond laser etching technology and the low-energy-state hydrophobic film coating technology are combined, and the method has the advantages of being high in machining precision and stability, rapid and efficient in preparation and the like and can be widely applied to machining of micro-nano arrays on the surfaces of various compounds.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, and in particular relates to a femtosecond laser ablation-surface coating composite processing method on a super-hydrophobic surface. Background technique [0002] In special environments such as ocean, air, sky, etc., due to long-term exposure to harsh environments such as moisture, dust, and salt spray, various equipment is prone to chemical corrosion and electrochemical corrosion on the surface, which will greatly reduce the use effect and performance of the equipment. Effective life. Therefore, it is urgent to carry out the research and development of key technologies for superhydrophobic treatment of metal and composite material coating surfaces, so as to provide practical solutions for the large-scale application of superhydrophobic materials. [0003] According to research, natural organisms have various superhydrophobic functions. The upper surface of the lotus leaf is the most ...

Claims

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Application Information

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IPC IPC(8): B23K26/36B23K26/352B23K26/60C23C16/26C23C16/02
CPCB23K26/36B23K26/352B23K26/60C23C16/26C23C16/0227
Inventor 黄小平杨镇源陈若童陈世争赵青
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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