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Method for preparing nepenthes bionic super-lubricating surface by using laser etching method

A laser etching and super-lubrication technology, which is applied to laser welding equipment, devices for coating liquid on the surface, special surfaces, etc., can solve the problems of good hydrophobicity of super-lubricating surfaces, and achieve good hydrophobicity, thorough penetration, and no easy bubble effect

Active Publication Date: 2021-10-22
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the deficiencies of the prior art, the present invention provides a method for preparing the bionic super-lubricating surface of Nepenthes by laser etching, which solves the existing problems, and the prepared super-lubricating surface has excellent hydrophobic properties

Method used

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  • Method for preparing nepenthes bionic super-lubricating surface by using laser etching method
  • Method for preparing nepenthes bionic super-lubricating surface by using laser etching method
  • Method for preparing nepenthes bionic super-lubricating surface by using laser etching method

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Embodiment Construction

[0023] Such as Figure 1-4 As shown, the method for preparing an aluminum-based imitation pitcher plant super-lubricating surface by laser etching method comprises the steps as follows:

[0024] Step 1), the aluminum plate is cut into the size to be processed, and polished. In this embodiment, the aluminum plate is polished on sandpaper with a mesh number of 400#, 800#, 1000#, 1200#, 1500# and 2000#; The polishing machine is used for polishing to make a mirror surface; the polished aluminum plate is placed in deionized water and cleaned with an ultrasonic cleaner for 15 minutes; then placed in a drying oven and dried at 80°C for 30 minutes;

[0025] Step 2), placing the processed aluminum plate 1 under a nanosecond laser, and performing surface etching;

[0026] The nanosecond laser parameters are as follows: the wavelength is 1064nm, the average power is 10w, the scanning speed is 100mm / s, the repetition frequency is 20KHz, the pulse width is 50ns, the spot diameter is about...

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Abstract

The invention discloses a method for preparing a nepenthes bionic super-lubricating surface by using a laser etching method. The method comprises the following steps of 1) cutting, grinding and polishing an aluminum plate into a mirror surface, conducting ultrasonic cleaning for 15 min in deionized water, and drying at 80 DEG C for 30 minutes; (2) placing the aluminum plate on the lower surface of a nanosecond laser device to be etched, and moving a laser beam in a line-by-line scanning manner to irradiate in two vertical directions respectively to form a micron-sized square column array; 3) after laser etching, performing ultrasonic cleaning and drying, immersing the aluminum plate into a mixed solution of heptadecafluorodecyl triethoxysilane (PFDTES) and absolute ethyl alcohol in a volume ratio of 1: 100, standing at room temperature of 25 DEG C for 12 hours, washing with distilled water, and drying at 80 DEG C for 30 minutes; and (4) immersing the dried aluminum plate into perfluoropolyether lubricating oil at the inclination angle of 45 degrees and the speed of 3 mm / s, after the aluminum plate is completely immersed in the lubricating oil, horizontally standing for 30 minutes, taking out the aluminum plate, standing for 30 minutes at the inclination angle of 15 degrees with the horizontal plane, and then vertically placing the aluminum plate, and removing excessive lubricating oil to obtain the super-lubricating surface with excellent hydrophobicity and long-term effectiveness.

Description

technical field [0001] The invention relates to the technical field of hydrophobic superlubricating surfaces, in particular to a method for preparing superlubricating surfaces with good hydrophobicity. Background technique [0002] In recent years, the superhydrophobic surface (SHS) prepared based on the principle of "lotus leaf effect" has been widely studied and applied. The contact of air trapped between them significantly reduces the actual solid-liquid contact area, reduces the adhesion force, and increases the contact angle. Coupled with the low surface energy characteristics of the surface, water droplets are easy to fall off from the surface. [0003] However, in practical applications, the droplet easily enters the trapped air layer due to capillary action, and the air is squeezed out, so that the wetting state of the droplet on the solid surface changes from the Cassie state to the Wenzel state, thereby affecting the hydrophobicity. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/18B05D5/00B23K26/362
CPCB05D1/18B05D5/00B23K26/362B05D2202/25B05D2504/00
Inventor 刘文龙王守仁王高琦周超张建鹏李重阳时晓宇薛成龙李金坤
Owner UNIV OF JINAN
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