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A kind of preparation method of superhydrophobic coating

A super-hydrophobic coating, ionized water technology, applied in the coating, the device for coating liquid on the surface, the surface pretreatment, etc. Cracks or fractures, etc., to achieve the effect of increasing hydrophobicity, low surface energy, and stable coating quality

Active Publication Date: 2021-09-17
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the final analysis, the etching process is an operation that damages the surface of the substrate, especially for thin-layer aluminum alloy substrates, the mechanical properties will be greatly affected during the etching process, and even lead to cracks or breakage of the substrate. The rate is low, and the micro-nano morphology of the surface of the copper sheet is simple in the existing etching method, so that the hydrophobic effect of the prepared hydrophobic coating is poor, and the wear resistance and bending resistance are poor.

Method used

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  • A kind of preparation method of superhydrophobic coating
  • A kind of preparation method of superhydrophobic coating
  • A kind of preparation method of superhydrophobic coating

Examples

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Embodiment 1

[0040] A kind of preparation method of superhydrophobic coating of the present embodiment, described method comprises the steps:

[0041] (1) Substrate pretreatment: select a circular copper sheet with a diameter of 1 cm and a thickness of 0.2 mm, and polish and derust the surface of the copper sheet sequentially through 400 mesh, 600 mesh, 1000 mesh, 1500 mesh, and 2000 mesh sandpaper, and then Use acetone, ethanol, and deionized water to ultrasonically clean surface oil stains and other impurities, and dry them for later use;

[0042](2) Copper sheet etching: first copper sheet is immersed in the mixed solution of sodium chloride and hydrochloric acid 4h, and the mixed solution of sodium chloride and hydrochloric acid is the sodium chloride aqueous solution that concentration is 1mol / L and mass fraction is 10% hydrochloric acid The solutions are mixed in equal volumes, cleaned with deionized water, dried, and then immersed in the mixed solution of hydrogen peroxide and hydro...

Embodiment 2

[0045] A kind of preparation method of superhydrophobic coating of the present embodiment, described method comprises the steps:

[0046] (1) Substrate pretreatment: select a circular copper sheet with a diameter of 1 cm and a thickness of 0.2 mm, and polish and derust the surface of the copper sheet sequentially through 400 mesh, 600 mesh, 1000 mesh, 1500 mesh, and 2000 mesh sandpaper, and then Use acetone, ethanol, and deionized water to ultrasonically clean surface oil stains and other impurities, and dry them for later use;

[0047] (2) Copper sheet etching: earlier copper sheet is immersed in the mixed solution of sodium chloride and hydrochloric acid 6h, and the mixed solution of sodium chloride and hydrochloric acid is the sodium chloride aqueous solution that concentration is 1.5mol / L and mass fraction is 15% Hydrochloric acid solution is mixed in equal volumes, cleaned with deionized water, dried, and then immersed in a mixed solution of hydrogen peroxide and hydrochl...

Embodiment 3

[0050] A kind of preparation method of superhydrophobic coating of the present embodiment, described method comprises the steps:

[0051] (1) Substrate pretreatment: select a circular copper sheet with a diameter of 1 cm and a thickness of 0.2 mm, and polish and derust the surface of the copper sheet sequentially through 400 mesh, 600 mesh, 1000 mesh, 1500 mesh, and 2000 mesh sandpaper, and then Use acetone, ethanol, and deionized water to ultrasonically clean surface oil stains and other impurities, and dry them for later use;

[0052] (2) Copper sheet etching: first copper sheet is immersed in the mixed solution of sodium chloride and hydrochloric acid 8h, and the mixed solution of sodium chloride and hydrochloric acid is the sodium chloride aqueous solution that concentration is 2mol / L and mass fraction is 20% hydrochloric acid The solution is mixed in equal volumes, dried, and then immersed in the mixed solution of hydrogen peroxide and hydrochloric acid for 10 hours. The ...

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Abstract

The invention relates to a method for preparing a super-hydrophobic coating. The etching method in the invention uses three different immersion solutions to immerse for a period of time, so that the etching rate can be accelerated by using different immersion solutions. The proportion of the liquid can speed up the etching rate. By speeding up the etching rate, the amount of side etching and the edge can be reduced. The micro-nano morphology formed on the surface of the copper sheet is more complex, which increases the hydrophobicity, friction resistance and durability of the super-hydrophobic coating. Bending resistance: the present invention selects two kinds of fluorosilanes and silanes with similar boiling points, which can be better deposited on the surface of the etched substrate copper, so that the coating has a very low surface energy, the coating quality is relatively stable, and good hydrophobicity is achieved. The effect makes the corrosion resistance and cleaning performance of copper better, and the service life is longer.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic materials, and in particular relates to a preparation method of a superhydrophobic coating. Background technique [0002] Because of its thermal conductivity, electrical conductivity, corrosion resistance and processing properties, copper has important applications in various industries such as electric power, marine and military industries. For example, most of the condensers in the power industry, the heat exchange devices of low-pressure heating and oil coolers, and the hollow wires of water-cooled generators are made of copper alloy materials; in the marine military industry, in the water piping systems of military warships such as aircraft carriers Most of them are some copper materials; civil medical equipment, industrial utensils, telecommunications industry parts, etc. have copper applications. However, the application of copper has been limited due to the serious corrosion probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D1/00B05D3/02B05D5/00C23F1/18
CPCB05D1/60B05D3/0254B05D5/00C23F1/18
Inventor 郭思瑶罗惠华陈际洲乔晓立张素磊谭哲
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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