Preparation method of high-adhesion superhydrophobic surface based on laser chemical composite process

A super-hydrophobic surface and high-adhesion technology, which is applied in the direction of surface coating liquid devices, special surfaces, pre-treated surfaces, etc., can solve the constraints on the industrialization of ultra-fast laser processing methods and the processing of ultra-fast laser processing methods Low efficiency, difficult laser maintenance and other problems, to achieve the effect of high reliability, lower production cost, high adhesion

Active Publication Date: 2022-07-15
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many scholars have successfully prepared highly adhesive superhydrophobic surfaces by using ultrafast laser processing methods, and achieved good results and obtained a variety of applications, this processing method still has certain limitations.
This is mainly due to the low processing efficiency of the ultrafast laser processing method, and the difficulty of maintaining the laser, and the high overall processing cost, which seriously restricts the industrialization of the ultrafast laser processing method.

Method used

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  • Preparation method of high-adhesion superhydrophobic surface based on laser chemical composite process
  • Preparation method of high-adhesion superhydrophobic surface based on laser chemical composite process
  • Preparation method of high-adhesion superhydrophobic surface based on laser chemical composite process

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preparation example Construction

[0024] The preparation method of the high-adhesion super-hydrophobic surface based on the laser chemical composite process according to the embodiment of the present invention includes the following steps:

[0025] Step 10) cleaning the substrate: cleaning the alloy substrate;

[0026] Step 20) Laser surface micro-texture: place the cleaned alloy substrate on the sample stage of the ultraviolet nanosecond laser processing system, use a laser beam to process the micro-nano structure on the surface of the alloy substrate, and then ultrasonically clean it in absolute ethanol for 10~ 15 minutes;

[0027] Step 30) Wetting with silane solution: the alloy substrate treated in step 20) is soaked in a mixed solution of 1H, 1H, 2H, 2H-tetrahydroperfluorooctyltrichlorosilane and ethanol, and then taken out and placed in nitrogen Blow dry in the stream, and finally put it in the oven to bake;

[0028] Step 40) Sodium chloride solution soaking: soak the alloy substrate treated in step 30...

Embodiment 1

[0040] Step 10) Cut the AA6061 aluminum alloy substrate into a size of 15mm×15mm, and then use acetone, anhydrous ethanol, and deionized water to ultrasonically clean the substrate for 10 minutes in order to remove contaminants on the substrate surface. It was then blown dry in a stream of nitrogen.

[0041] Step 20) Perform laser microtexturing on the surface, and the selected laser parameters are as follows: the pulse width is 20ns, the laser wavelength is 355nm, the pulse repetition frequency is 30kHz, the laser power is 15W, the pulse energy is 0.5mJ, and the laser power density is 5.0 GW / cm 2 , the effective spot diameter after focusing is about 25 μm, the laser scanning rate is 50 mm / s, and the laser beam scanning area is 12 mm×12 mm. The laser-prepared substrates were placed in absolute ethanol for ultrasonic cleaning for 10 minutes.

[0042] Step 30) Soak the substrate in a mixed solution of 1H, 1H, 2H, 2H-tetrahydroperfluorooctyltrichlorosilane with a volume fractio...

Embodiment 2

[0046] Step 10) Cut the AA6061 aluminum alloy substrate into a size of 16 mm×16 mm, and then use acetone, absolute ethanol, and deionized water for ultrasonic cleaning for 12 minutes in sequence to remove contaminants on the surface of the substrate. It was then blown dry in a stream of nitrogen.

[0047] Step 20) Perform laser microtexturing on the surface, and the selected laser parameters are as follows: the pulse width is 20ns, the laser wavelength is 355nm, the pulse repetition frequency is 10kHz, the laser power is 1W, the pulse energy is 0.1mJ, and the laser power density is 1.0 GW / cm 2 , the effective spot diameter after focusing is about 26 μm, the laser scanning rate is 5 mm / s, and the laser beam scanning area is 12 mm × 12 mm. The laser-prepared substrates were placed in absolute ethanol for ultrasonic cleaning for 12 minutes.

[0048] Step 30) Soak the substrate in a mixed solution of 1H, 1H, 2H, 2H-tetrahydroperfluorooctyltrichlorosilane with a volume fraction o...

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Abstract

The invention discloses a preparation method of a high-adhesion super-hydrophobic surface based on a laser chemical composite process, which improves the preparation efficiency. The method includes the following steps: step 10) cleaning the substrate; step 20) laser surface microtexture: using a laser beam to process micro-nano structures on the surface of the alloy substrate, and then ultrasonically cleaning in absolute ethanol; step 30) silane solution infiltration: the step 20) The treated alloy substrate is soaked in a mixed solution of 1H, 1H, 2H, 2H-tetrahydroperfluorooctyltrichlorosilane and ethanol, then taken out and placed in a nitrogen stream to dry, and finally placed in an oven Medium baking; Step 40) Sodium chloride solution soaking: soak the alloy substrate treated in step 30) in a sodium chloride solution, then take it out and clean it with deionized water, and finally place it in a nitrogen stream to dry it to obtain High adhesion superhydrophobic surface.

Description

technical field [0001] The invention belongs to the field of material processing engineering, and in particular relates to a preparation method of a high-adhesion super-hydrophobic surface based on a laser-chemical composite process. Background technique [0002] Inspired by nature, surfaces with special wettability have received extensive attention in recent years, and most of them are superhydrophobic surfaces. Due to its anti-icing, self-cleaning, drag reduction, water-oil separation and other properties, superhydrophobic surfaces have shown high application potential and value in many fields. Generally, superhydrophobic surfaces come in two forms: superhydrophobic surfaces with self-cleaning properties, also known as "lotus leaf effect" surfaces; and superhydrophobic surfaces with high surface adhesion, also known as "rose petal effect" "surface. The biggest difference between these two superhydrophobic surfaces is the difference in the adhesion to water. Usually, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/00B05D5/10B05D7/14B05D3/14C23C22/78C23C22/02
CPCB05D5/00B05D5/10B05D7/14B05D3/14C23C22/78C23C22/02B05D2202/20B05D2202/25B05D2202/35B05D2202/10C23C2222/20
Inventor 王青华王慧鑫
Owner SOUTHEAST UNIV
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