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Method for forming super-hydrophilic anti-reflective composite coating on glass substrate

A glass substrate and composite coating technology, applied in the field of nanomaterial preparation, can solve the problems of defects, long-term superhydrophilic performance and few reports

Active Publication Date: 2015-03-18
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the anti-reflection self-cleaning glass has a good application prospect, the current preparation methods have certain defects, and there are few reports on the long-term research of superhydrophilic properties.

Method used

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  • Method for forming super-hydrophilic anti-reflective composite coating on glass substrate
  • Method for forming super-hydrophilic anti-reflective composite coating on glass substrate
  • Method for forming super-hydrophilic anti-reflective composite coating on glass substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of sol containing silica particles:

[0038] (1) Mix 22.3mL of tetraethoxysilane, 22.3mL of absolute ethanol, 1.8mL of water and different volumes (5×10 -2 mL, 5×10 -3 mL and 5×10 -4 mL) of concentrated hydrochloric acid (37% by mass fraction) were mixed in a double-neck flask, stirred at a temperature of 60°C for 90 minutes, and then cooled to room temperature to obtain three mixed solutions;

[0039] (2) Add the concentrated hydrochloric acid (mass fraction is 37%) of 7.2mL, the water of 0.4mL and the ethanol of 46.6mL respectively in three kinds of mixed solutions of room temperature that step (1) obtains, after stirring at room temperature for 15 minutes, Aging was carried out at a temperature of 50°C for 3 hours; cetyltrimethylammonium bromide was added to the three aged solutions to make the three aged solutions of cetyltrimethylammonium bromide The mass fraction in all is 2.5%, stir at room temperature for 1 hour, prepare the sol solution containin...

Embodiment 2

[0042] Preparation of sol containing silica particles:

[0043] (1) Mix 22.3mL of tetraethoxysilane, 22.3mL of absolute ethanol, 1.8mL of water and 5×10 -3 mL of concentrated hydrochloric acid (37% by mass) was mixed in a double-neck flask, stirred at 60°C for 90 minutes, and then cooled to room temperature to obtain a mixed solution;

[0044] (2) Add a certain volume (5mL, 7.2mL or 10mL) of concentrated hydrochloric acid (mass fraction is 37%), 0.4mL of water and 46.6mL of ethanol to the mixed solution at room temperature obtained in step (1). Stir for 15 minutes, then carry out aging at a temperature of 50°C for 3 hours; add cetyltrimethylammonium bromide to the aged solution to make the cetyltrimethylammonium bromide in the aged solution The mass fraction in is 2.5%, and stirred at room temperature for 1 hour to prepare a sol solution containing silica particles for preparing a coating.

[0045] The characterization of the transmission electron microscope shows that the a...

Embodiment 3

[0047] Preparation of sol containing silica particles:

[0048] (1) Mix 22.3mL of tetraethoxysilane, 22.3mL of absolute ethanol, 1.8mL of water and 5×10 -3 mL of concentrated hydrochloric acid (mass fraction 37%) was mixed in a double-neck flask, stirred at 30°C, 60°C and 90°C for 90 minutes, and then cooled to room temperature to obtain three mixtures;

[0049] (2) Add 7.2mL of concentrated hydrochloric acid (37% by mass fraction), 0.4mL of water and 46.6mL of ethanol to the three mixed solutions at room temperature obtained in step (1) respectively, stir at room temperature for 15 minutes, and then Aging was carried out at a temperature of 50°C for 3 hours; cetyltrimethylammonium bromide was added to the three aging solutions to make the mass of cetyltrimethylammonium bromide in the aged solution The fractions were 2.5%, respectively, and stirred at room temperature for 1 hour to prepare sol solutions containing silica particles for coating preparation.

[0050] The charac...

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Abstract

The invention relates to a method for forming a super-hydrophilic anti-reflective composite coating on a glass substrate, and the super-hydrophilic anti-reflective composite coating formed by use of the method. The method comprises the steps of soaking the glass substrate into a sol solution containing silica particles, removing organic matters by use of a pulling method and by virtue of calcining, soaking the glass substrate covered with a silica coating into the precursor sol solution of titanium dioxide to prepare a titanium dioxide coating on the glass substrate covered with the silica coating by use of the pulling method, and then calcining titanium dioxide into an anatase crystal form, and finally, structuring the high-strength and long-acting super-hydrophilic anti-reflective silica / titanium dioxide composite coating on the glass substrate. The light transmittance of the glass substrate covered with the high-strength and long-acting super-hydrophilic anti-reflective composite coating is increased to 96.9% from 91.2% of blank glass, and the contact angle of water on the surface of the glass substrate is 0-1 degree; even after the glass substrate is placed indoors for 75 days, the contact angle of water on the surface is still kept below 5 degrees.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for constructing a high-strength, long-lasting super-hydrophilic anti-reflection composite coating on a glass substrate, and a high-strength, long-term super-hydrophilic anti-reflection composite coating obtained by the method layer. Background technique [0002] Since the 1950s, glass curtain walls have been favored by owners and architects, and to some extent replaced traditional clay brick masonry as the outer wall structure of high-rise buildings. The glass curtain wall integrates windproof, rainproof, thermal insulation, heat insulation, noise prevention, air penetration resistance and decorative functions. However, with the increasing prosperity and development of the economy, the problem of environmental pollution has become increasingly serious, and has become a focus problem that directly threatens the survival of human beings and needs to be s...

Claims

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Application Information

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IPC IPC(8): C03C17/34
CPCC03C17/3417
Inventor 贺军辉姚琳
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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