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Method for preparing glass surface super-hydrophobic membrane

A glass surface, super-hydrophobic technology, applied in the direction of coating, etc., to achieve excellent light transmission and scratch resistance, durable anti-fingerprint, obvious anti-fingerprint effect

Inactive Publication Date: 2017-11-21
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardness of the coating is 6H and the adhesion level is 5B. It is difficult to apply in high-intensity environments such as touch screens, high-speed train glass, etc., or long-term erosion of high-speed airflow containing dust.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 13 mL of 0.1 mol / L hydrochloric acid solution into a beaker containing 2.22 g of boric acid and 0.76 g of sodium nitrate, then add 41.8 mL of absolute ethanol and 20 mL of tetraethoxysilane in sequence, and stir magnetically for 4 h at room temperature. Overnight, a colorless and transparent sodium borosilicate sol was obtained.

[0017] Use ethanol and deionized water to ultrasonically clean the 76mm*25mm*1mm glass sheet sequentially for 10 minutes, then pickle and activate the glass substrate to be coated with a mixture of 98% concentrated sulfuric acid and 30% hydrogen peroxide in a volume ratio of 3:1 for 60 minutes.

[0018] The coating film was dipped and pulled, the pulling rate was 130 mm / s, and the dipping time was 30 s. After drying at room temperature for 6 h, heat treatment was performed, and the gel film was placed in an electric furnace at a heating rate of 0.5 °C / min, and kept at 520 °C for 6 h. The obtained sample contained the following chemical co...

Embodiment 2

[0021] Add 13 mL of 0.1 mol / L hydrochloric acid solution into a beaker containing 2.22 g of boric acid and 0.76 g of sodium nitrate, then add 41.8 mL of absolute ethanol and 20 mL of tetraethoxysilane in sequence, and stir magnetically for 4 h at room temperature. Add 0.5 wt% polyethylene glycol with a molecular weight of 20,000, stir until fully dissolved, and leave overnight to obtain a colorless transparent sodium borosilicate sol.

[0022] Use ethanol and deionized water to ultrasonically clean the 100mm*120mm*1mm quartz glass sheet for 10 minutes, then pickle and activate the substrate to be coated with a mixture of 98% concentrated sulfuric acid and 30% hydrogen peroxide in a volume ratio of 3:1 for 60 minutes.

[0023] To prepare the gel film by spin coating, first set the speed of the homogenizer at 1000 rpm for 10 s, then add a few drops of sol, then set the speed at 3000 rpm for 30 s to spread the sol evenly.

[0024] After drying at room temperature for 6 h, heat tr...

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PUM

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Abstract

The invention discloses a method for preparing a glass surface super-hydrophobic membrane, and relates to the technical field of glass surface treatment and coating preparation. The method comprises the following steps: coating the surface of a glass substrate with a sodium borosilicate glass membrane by using a sol-gel method, performing thermal treatment, treating with a buffer acid etching solution so as to turn the membrane into a communicated nano size porous structure, and coating the surface of the porous glass membrane with a layer of a low-surface energy fluoroalkyl silane compound membrane, thereby obtaining a super-hydrophobic membrane layer. The purposes of pollution resistance, fingerprint resistance and self cleaning of a glass surface are achieved, and glass with the super-hydrophobic membrane layer on the surface can be applied to fields such as 3C electronic product touch screens, lenses, high-speed train glass and periscopes.

Description

technical field [0001] The invention relates to the field of coating film on glass surface, in particular to the preparation technology of super-hydrophobic film on glass surface. Background technique [0002] Superhydrophobic coatings play a very important role in the anti-pollution, anti-fingerprint, and self-cleaning properties of automobile windshields, high-speed rail train glass, 3C electronic product touch screens, and aircraft glass. Hydrophobicity generally means that the contact angle of water on the surface of the material is greater than 90°, while superhydrophobicity requires that the contact angle of water on the surface of the material is not less than 150°. The superhydrophobicity of a solid surface is determined by its surface micro-nano structure and surface chemical composition. Studies have shown that a superhydrophobic surface can be achieved by constructing a rough structure and making the surface hydrophobic. [0003] "Functional Materials", Volume 6 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23
CPCC03C17/23C03C2217/23C03C2217/425C03C2217/76
Inventor 鲍田王东王芸甘治平
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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