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Preparation method of super hydrophobic coating based on super hydrophobic silica and resin

A super-hydrophobic coating, silica technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve problems such as poor coating strength and wear resistance

Inactive Publication Date: 2014-02-19
WUXI SHUNYE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the strength and wear resistance of the coating made by the prior art are relatively poor

Method used

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  • Preparation method of super hydrophobic coating based on super hydrophobic silica and resin
  • Preparation method of super hydrophobic coating based on super hydrophobic silica and resin
  • Preparation method of super hydrophobic coating based on super hydrophobic silica and resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Silicone resin with a solid content of 50% was coated onto a 1 x 5 cm glass slide as a substrate with a coating thickness of 0.5 mm.

[0021] Add 10 mL of methyltrimethoxysilane to 100 mL of industrially pure methanol, add 5 mL of 0.1 mol / L oxalic acid, stir for 10 minutes, let stand for 3 hours, then add 10 mL of 25% ammonia water, stir for 10 minutes, and Leave for 12 hours. The white precipitate obtained by filtration was washed twice with ethanol, and dried at 80° C. for 5 hours. The obtained particles are ground and filtered through a 200-mesh sieve to obtain methyl-modified white superhydrophobic silicon dioxide particles with a particle size of less than 75 microns, that is, alkyl siloxane.

[0022] The superhydrophobic silica was bonded to the resin by gravity sanding. That is, make the alkylsiloxane particles fall on the glass slide coated with silicone resin from a height of 5 cm directly above the slide glass, so that the alkylsiloxane particles completely ...

Embodiment 2

[0024] A 30% solids epoxy resin was coated onto a 1 x 5 cm glass slide as a substrate with a coating thickness of 0.4 mm.

[0025] Add 10 mL of methyltrimethoxysilane to 100 mL of industrial pure methanol, add 5 mL of 0.1 mol / L oxalic acid, stir for 10 minutes, let stand for 3 hours, then add 10 mL of 25% ammonia water, stir for 10 minutes, let stand 12 hours. The white precipitate obtained by filtration was washed twice with ethanol, and dried at 80° C. for 5 hours. The obtained particles are ground and filtered through a 200-mesh sieve to obtain methyl-modified white superhydrophobic silicon dioxide particles with a particle size of less than 75 microns, that is, alkyl siloxane.

[0026] Use the gravity sanding method to drop the alkylsiloxane particles on the glass slide coated with epoxy resin from a height of 6 cm directly above the glass slide, so that the alkylsiloxane particles completely cover the surface of the epoxy resin, A layer of alkylsiloxane particles forms ...

Embodiment 3

[0028] Polyurethane resin with a solid content of 25% was coated onto a 1 x 5 cm glass slide as a substrate with a coating thickness of 0.4 mm.

[0029] Add 10 mL of methyltrimethoxysilane to 100 mL of industrially pure methanol, add 5 mL of 0.1 mol / L oxalic acid, stir for 10 minutes, let stand for 3 hours, then add 10 mL of 25% ammonia water, stir for 10 minutes, and Leave for 12 hours. The white precipitate obtained by filtration was washed twice with ethanol, and dried at 80° C. for 5 hours. The obtained particles are ground and filtered through a 200-mesh sieve to obtain methyl-modified white superhydrophobic silicon dioxide particles with a particle size of less than 75 microns, that is, alkyl siloxane.

[0030] Using the gravity sanding method, the alkylsiloxane particles are dropped from a height of 11 cm directly above the glass slide on the glass slide coated with polyurethane resin, so that the alkylsiloxane particles completely cover the surface of the polyurethane...

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Abstract

The invention discloses a preparation method of a super hydrophobic coating based on super hydrophobic silica and resin. The resin as a substrate is coated on a glass slide; the super hydrophobic silica is bonded to the resin; and the resin is cured to prepare the super hydrophobic coating. The super hydrophobic coating prepared by the invention is composed of a base resin and a super hydrophobic silica surface layer. The body of the super hydrophobic silica layer is a super hydrophobic material, and if the surface is worn, the coating still has the same super hydrophobic property. When the super hydrophobic coating is polluted, the super hydrophobic function can be recovered by scraping off the surface layer. The super hydrophobic coating provided by the invention also can achieve waterproof effect due to the base resin.

Description

technical field [0001] The invention relates to a superhydrophobic coating, more particularly to a preparation method of a superhydrophobic coating. Background technique [0002] The wettability of the surface of solid materials is a major aspect of the surface properties of materials, and plays an important role in the fields of catalysis, coatings, waterproofing, and biomedical materials. Inspired by the lotus leaf effect, superhydrophobic materials with surface-water contact angles greater than 150° have attracted extensive attention in recent years. The super-hydrophobic coating can prevent the solid surface from getting water, thereby reducing the chemical reaction between the surface and water, reducing resistance, and has a self-cleaning function. It can be applied to buildings, ships, torpedoes, glass, satellite antennas, radars and other products. [0003] At present, superhydrophobic coatings are prepared by mixing nanoparticles with resin and adding a certain am...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/28B32B27/38B32B27/40B32B27/36
Inventor 杨得全侯远
Owner WUXI SHUNYE TECH
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