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Super-hydrophilic antireflection coating preparation method and super-hydrophilic antireflection coating

A super-hydrophilic coating technology, applied in the field of super-hydrophilic anti-reflective coatings, can solve the problems of coating strength and self-cleaning properties, inability to ensure complete removal of CTAB, unsatisfactory hydrophilic properties of coatings, etc., to achieve Wide application range, low cost and obvious effect

Active Publication Date: 2014-01-15
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The microstructure and performance of the nano-film can be controlled by adjusting the concentration of the surfactant, and the transmittance of the sample can be tested. However, the post-calcination treatment when the coating is prepared by this method cannot ensure that CTAB is completely removed, and the coating is hydrophilic. poor performance
[0006] The coating prepared by acid-catalyzed sol-gel technology has high strength, but its transmittance often does not meet the requirements, which is limited in real practical applications. Although the coating's transmittance can be improved by adjusting the ratio of raw materials rate, but while improving the transmittance of the coating, the strength and self-cleaning properties of the coating will be affected to a certain extent

Method used

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  • Super-hydrophilic antireflection coating preparation method and super-hydrophilic antireflection coating

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Mix 21~23mL of tetraethyl orthosilicate, 21~23mL of absolute ethanol, 1~2mL of water and 4×10 -4 ~6×10 -4 Mix mL of hydrochloric acid, part of the tetraethyl orthosilicate is hydrolyzed under acidic conditions, and stir at a temperature of 50°C~70°C for 80~100 minutes to obtain SiO 2 sol, the resulting SiO 2 The sol is cooled to room temperature; to the obtained SiO 2 Add 6-8mL of hydrochloric acid, 0.3-0.5mL of water and 45-47mL of absolute ethanol to the sol to continue hydrolysis of the remaining tetraethyl orthosilicate; when SiO 2 When the concentration of the sol reaches 9~11mol / L, after stirring at room temperature for 10~15 minutes, aging SiO at a temperature of 40°C~60°C 2 Sol for 2~4 hours; then add 105~107mL of absolute ethanol to dilute to obtain reagent; add surfactant cetyltrimethylammonium bromide (CTAB) to the obtained reagent, make CTAB The mass fraction content is 1.5%, and it is fully stirred for 30-90 minutes to obtain a transparent SiO with ...

Embodiment 2

[0046] Substantially adopt the same method as Example 1 to prepare a glass sheet sample with a high-strength super-hydrophilic anti-reflective coating on the surface, the difference is that:

[0047] In step (1), CTAB was added to the obtained reagent so that the mass fraction of CTAB in the reagent was 2.0%.

[0048] The obtained sample of the glass sheet with a high-strength super-hydrophilic anti-reflection coating attached to its surface is designated as A3. The light transmittance of the sample is as figure 1 Shown in line 2.

Embodiment 3

[0050] Substantially adopt the same method as Example 1 to prepare a glass sheet sample with a high-strength super-hydrophilic anti-reflective coating on the surface, the difference is that:

[0051] In step (1), CTAB was added to the obtained reagent so that the mass fraction of CTAB in the reagent was 2.5%.

[0052] The obtained sample of the glass sheet with a high-strength super-hydrophilic anti-reflection coating attached to its surface was designated as A4. The light transmittance of the sample is as figure 1 Indicated by midline 3. As can be seen from the figure, the light transmittance can reach 95.9%. Prepared SiO 2 TEM images of solid spherical nanoparticles such as figure 2 As shown in a, 2b is a partially enlarged TEM image of 2a. SiO in A4 sample 2 The particle size statistical histogram of solid spherical nanoparticles is shown in image 3 shown.

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Abstract

The present invention relates to a high strength super-hydrophilic antireflection coating preparation method and a high strength super-hydrophilic antireflection coating prepared through the method. According to the present invention, an acid catalysis sol-gel (sol-gel) method is adopted to prepare the high strength super-hydrophilic antireflection coating, wherein the super-hydrophilic antireflection coating integrates advantages of low reflectivity, high light transmittance, good hydrophilicity and the like of silica films; a SiO2 solid sphere type nanoparticle layer forms the rough structure of the coating surface, and the coating has characteristics of antireflection and super-hydrophilicity, wherein the particle size of the SiO2 solid sphere type nanoparticle is 3-4 nm; and the glass plate coated with the high strength super-hydrophilic antireflection coating can bear the 6H pencil scratch test, light transmittance of the glass plate coated with the high strength super-hydrophilic antireflection coating can be increased to 95.9% from 91.6%, and a contact angle of water on the surface of glass coated with the coating is 0 DEG.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a preparation method of a high-strength super-hydrophilic anti-reflection coating, and a high-strength super-hydrophilic anti-reflection coating prepared by the method. Background technique [0002] The sol-gel method (sol-gel) uses compounds containing highly chemically active components as precursors, uniformly mixes these raw materials in the liquid phase, and undergoes hydrolysis and condensation chemical reactions to form a stable transparent sol system in the solution After the sol is aged, the colloidal particles slowly aggregate to form a gel with a three-dimensional space network structure, and the gel network is filled with solvents that have lost fluidity to form a gel. The gel is dried, sintered, and cured to prepare materials with molecular and even sub-nanometer structures. [0003] SiO 2 The network structure of nano-sols is closely dependent on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/25C03C17/28
Inventor 贺军辉张志晖
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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