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Method for preparing superhard hydrophobic self-cleaning thin film

A self-cleaning, thin-film technology, applied in ion implantation plating, coating, metal material coating process, etc., can solve the problems of freezing and frosting, easy corrosion, and non-wear-resistant material surface.

Active Publication Date: 2021-11-02
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a method for preparing a superhard hydrophobic self-cleaning film, which can solve the problems of non-abrasion resistance, easy corrosion, freezing and frosting on the surface of the material

Method used

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  • Method for preparing superhard hydrophobic self-cleaning thin film
  • Method for preparing superhard hydrophobic self-cleaning thin film
  • Method for preparing superhard hydrophobic self-cleaning thin film

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specific Embodiment approach 1

[0028] Embodiment 1: This embodiment is a method for preparing a superhard hydrophobic self-cleaning film, which includes the following steps:

[0029] 1. Substrate pretreatment: put the Q235 steel substrate in KOH and NaHCO 3 Remove oil from the mixture, rinse and neutralize with dilute HCl, and then grind and polish step by step with metallographic sandpaper, then ultrasonically clean in acetone and absolute ethanol, and dry with cold air;

[0030] 2. Preparation before coating: Put the substrate cleaned in step 1 into the vacuum chamber of magnetron sputtering, pass in the mixed gas of argon + neon + hydrogen and adjust the air pressure in the vacuum chamber, turn on the high-power pulse power supply and bias power supply, Sputtering cleaning and etching the substrate, and then pre-sputtering the Cr target;

[0031] 3. Preparation of Cr / CrN periodic layer: using high-power pulse + bias hybrid magnetron sputtering method, first pass Ar gas through the sputtering Cr target t...

specific Embodiment approach 2

[0035]Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the concentration of KOH described in step 1 is 10-50 g / L, NaHCO 3 The concentration is 20-80g / L, and the concentration of dilute HCl is 3-8mol / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0036] Specific embodiment three: this embodiment differs from specific embodiment one or two in that: the polishing described in step one adopts metallographic sandpaper of 500#, 800#, 1000#, 1500# and 2000# to polish successively, and the polished matrix in Al 2 o 3 Under the action of polishing paste, the polishing treatment is performed for 0.5-3 hours, the ultrasonic power is 100-200W, and the ultrasonic time is 10-30 minutes. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a superhard hydrophobic self-cleaning thin film. The method comprises the following steps: 1, pretreating a substrate; 2, carrying out preparation before film coating; 3, preparing a Cr / CrN periodic film; 4, carrying out plasma etching; 5, modifying the surfaces of Al2O3 particles; and 6, preparing a hydrophobic film through modification in an organic solution, so as to obtain the dense uniform superhard hydrophobic corrosion-resistant composite thin film. According to the method, a physical deposition method and a chemical soaking method are combined, the mutual complementarity is achieved, and the respective advantages are exploited to the full; the magnetron sputtering is continuous and stable; the prepared thin film is dense and uniform; through the periodic film, the hardness of a composite film layer can be greatly improved, the stress can be released, and the toughness can be improved; through the modification in the organic solution, the hydrophobic performance of the thin film surface can be improved; and after the surfaces of the Al2O3 particles are modified, the Al2O3 particles are doped with the organic solution for modification, so that the remarkable effect can be achieved. The method is used for preparing the superhard hydrophobic self-cleaning composite thin film.

Description

technical field [0001] The invention relates to the technical field of self-cleaning films, in particular to a preparation method of a superhard hydrophobic self-cleaning film. Background technique [0002] Glasses, car windshields, and observation mirrors will freeze and frost on the surface when they encounter water vapor in cold winter, which seriously hinders the line of sight, affects traffic travel, and increases the probability of accidents. At present, materials such as glasses and car windows are mostly resin or glass. If a superhard hydrophobic film is prepared on the surface, it can reduce the phenomenon of icing and frosting, and secondly, it can reduce the scratch and wear of the surface. For ships sailing on the sea and in rivers, the bottom is often worn due to reefs, etc., and the presence of chloride ions in seawater is prone to corrosion at the position of the submerged arc welding joint on the bottom of the ship, which is potentially dangerous and affects ...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/58C23C14/16C23C14/06C09D183/08C09D7/62
CPCC23C14/35C23C14/3485C23C14/345C23C14/165C23C14/0641C23C14/5826C23C14/5873C23C14/0036C09D183/08C09D7/62C08K2003/2227C08K9/06C08K3/22
Inventor 张颢曦许崇南詹非凡王杰许胤曦李海涛陈宜
Owner NANCHANG HANGKONG UNIVERSITY
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