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Preparation method and application of ultra-hydrophobic coating

A super-hydrophobic and coating technology, which is applied in coatings, devices for coating liquids on the surface, anti-corrosion coatings, etc., can solve the problems of super-hydrophobicity being easily damaged and hindering applications

Inactive Publication Date: 2015-01-21
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the superhydrophobicity of most superhydrophobic films is easily damaged, and their complex fabrication techniques require harsh conditions and special equipment, which hinder their applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example is used to illustrate the method for forming a superhydrophobic coating on a substrate provided by the present invention.

[0033] Solution preparation:

[0034] (A) Inorganic dispersion system: disperse titanium dioxide with a particle size of 10nm-1μm, zirconia with a particle size of 100nm-1μm, and alumina particles with a particle size of 100nm-1μm in a weight ratio of 1:2:2. In an aqueous solution with a surfactant, stir at 20°C for 24 hours to form a suspension; dissolve nickel chloride and nickel sulfate in water, and stir for 12 hours to form an aqueous solution whose concentrations of nickel chloride and nickel sulfate are respectively 0.5 mol / l; The suspension is mixed with the aqueous solution.

[0035] (B) Fluorine-containing chlorosilane solution: add C 12 Perfluorochlorosilane (ALD RICH) was dispersed in ethanol solvent, stirred for 1 hour to disperse evenly.

[0036] Substrate treatment:

[0037] The size of the stainless steel bar as...

Embodiment 2

[0042] This example is used to illustrate the method for forming a superhydrophobic coating on a substrate provided by the present invention.

[0043] Solution preparation:

[0044] (A) Inorganic dispersion system: Disperse titanium dioxide particles with a particle size of 10nm-1μm and zirconia particles with a particle size of 100nm-1μm in a weight ratio of 1:2 in an aqueous solution with a surfactant added, at 20°C Stir for 12 hours to form a suspension; dissolve nickel chloride and nickel sulfate in water, and stir for 12 hours to form an aqueous solution with a nickel chloride and nickel sulfate concentration of 0.5 mol / l; mix the suspension with the aqueous solution.

[0045] (B) Fluorine-containing chlorosilane solution: add C 18 Perfluorochlorosilane (ALD RICH) was dispersed in ethylene glycol solvent, stirred for 1 hour to disperse evenly.

[0046] Substrate treatment:

[0047] The size of the stainless steel bar as the substrate is 75 mm x 15 mm x 1 mm. The s...

Embodiment 3

[0052] This example is used to illustrate the method for forming a superhydrophobic coating on a substrate provided by the present invention.

[0053] Solution preparation:

[0054] (A) Inorganic dispersion system: Disperse titanium dioxide particles with a particle size of 10nm-1μm and alumina particles with a particle size of 100nm-1μm in a weight ratio of 1:2 in an aqueous solution with surfactants, stir at 20 degrees for 24 Form a suspension within 1 hour; Dissolve nickel chloride and nickel sulfate in water, stir for 12 hours to form an aqueous solution whose concentration of nickel chloride and nickel sulfate is respectively 0.5 mol / l; mix the suspension with the aqueous solution.

[0055] (B) Fluorine-containing chlorosilane solution: add C 12 Perfluorochlorosilane (ALD RICH) was dispersed in butanol solvent, stirred for 2 hours to disperse evenly.

[0056] Substrate treatment:

[0057] The size of the stainless steel bar as the substrate is 75 mm x 15 mm x 1 mm....

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Abstract

The invention provides a preparation method of an ultra-hydrophobic coating. The preparation method includes following steps: (1) forming an inorganic substance coating by an inorganic dispersing system on a base material; and (2) performing surface modification to the inorganic substance coating obtained through the step (1) with fluorine-containing chlorosilane. In the step (1), the inorganic dispersing system including inorganic substance particles and a surfactant coats a surface of the base material in manners of spraying, brushing, spin-coating and dip-coating. In the step (2), the base material with the inorganic substance coating thereon is impregnated in a fluorine-containing chlorosilane solution for 1-24 hours and then the coating is dried to form the ultra-hydrophobic coating. A test result proves that the ultra-hydrophobic coating can be maintained to have an ultra-hydrophobic property even being soaked in a concentrated acid or concentrated alkali solution. The ultra-hydrophobic coating, due to the durable ultra-hydrophobic property, has a self-cleaning function and an excellent corrosion-resistant performance. A contact angle of the ultra-hydrophobic coating after being corroded is more than 150 degrees.

Description

technical field [0001] The invention relates to a preparation method and application of a superhydrophobic coating. Background technique [0002] All articles and equipment used in external environments always encounter problems of corrosion and contamination. When the casing of outdoor equipment gets dust and rain, its appearance will be damaged. If exposed metal parts of offshore equipment rust, certain functions will be lost. Corrosion of metal detectors or probes in biochemical testing equipment can reduce their accuracy. [0003] These situations and hazards can be avoided or mitigated if these articles and equipment can be protected with corrosion-resistant and self-cleaning surfaces. For example, a superhydrophobic film like the lotus leaf, which has a highly hydrophobic surface and is very difficult to wet, is an effective example to improve corrosion resistance and provide self-cleaning functions, so that the corrosive medium cannot directly contact the substrate...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12C09D5/08B05D3/10
Inventor 刘珊曹雷
Owner SIEMENS AG
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