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Chain or meshed colloidal silica, super hydrophilic self-cleaning anti-reflection coating liquid and preparation application

A technology of silica sol and coating solution, which is applied in the field of nanomaterials, can solve the problems of large particle size, high refractive index, and low refractive index of the sol, and achieve the effects of obvious power gain, high hardness of the film layer, and good weather resistance

Active Publication Date: 2016-03-30
CSG HOLDING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the silica sol prepared by acid catalysis has a small particle size, is firmly bonded to the glass surface, and has a high hardness of the film layer, but has low porosity, high refractive index, and low transmittance of the antireflection and antireflection film; prepared by alkali catalysis Silica sol has a large particle size, high porosity and low refractive index, and the anti-reflection and anti-reflection coating has a high light transmittance, but the film layer is not firmly bonded to the glass substrate, and it is easy to fall off, so it has no industrial application value.
[0006] Therefore, in the prior art, many properties of the coating made by coating the anti-reflection and anti-reflection coating solution on the glass are still not ideal.

Method used

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  • Chain or meshed colloidal silica, super hydrophilic self-cleaning anti-reflection coating liquid and preparation application
  • Chain or meshed colloidal silica, super hydrophilic self-cleaning anti-reflection coating liquid and preparation application
  • Chain or meshed colloidal silica, super hydrophilic self-cleaning anti-reflection coating liquid and preparation application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) Preparation of hydroxyl-rich chain or network silica sol

[0062] (1) Add 100 mL of isopropanol as a solvent into a three-necked flask, and under stirring at 15°C, slowly add deionized water and hydrochloric acid as a catalyst into the three-necked flask, and continue stirring for 30 minutes to obtain liquid A;

[0063] (2) Under the condition of stirring at 15°C, silicone oil (polydimethylsiloxane, commercially available from Shanghai Kaishida Chemical Co., Ltd., model No. PMX-200 silicone oil, 0.65-2cSt) was slowly added to liquid A, and continued to stir for 30 minutes to obtain liquid B;

[0064] (3) Under the condition of stirring at 15°C, mix methyltriethoxysilane and tetraethoxysilane as an alkoxysilane evenly, then slowly add the evenly mixed alkoxysilane into liquid B, and heat up to 40 °C, continue to stir for 0.5h, then stop stirring, age at 25°C for 1 day, and obtain hydroxyl-rich chain or network silica sol after cooling.

[0065] Wherein, the volume...

Embodiment 2

[0093] (1). Preparation of hydroxyl-rich chain or network silica sol

[0094] (1) Add 100 mL of isopropanol as a solvent into the three-necked flask, and under stirring at room temperature, slowly add the uniformly mixed deionized water and oxalic acid as a catalyst into the three-necked flask, and continue stirring for 30 minutes to obtain liquid A;

[0095] (2) Under stirring conditions at room temperature, silicone oil (polydimethylsiloxane, commercially available from Shanghai Kaishida Chemical Co., Ltd., model No. PMX-200 silicone oil, 5-20cSt) was slowly added to liquid A, and continued to stir for 30 minutes to obtain liquid B;

[0096] (3) Under the condition of stirring at room temperature, mix tetramethoxysilane and methyltrimethoxysilane as an alkoxysilane evenly, then slowly add the evenly mixed alkoxysilane into liquid B, and heat up to 80°C Continue to stir for 5 hours, then stop stirring, age at 80°C for 5 days, and obtain hydroxyl-rich chain or network silica...

Embodiment 3

[0118] (1). Preparation of hydroxyl-rich chain or network silica sol

[0119] (1) Add 100 mL of methanol as a solvent into the three-necked flask, and under stirring at 35°C, slowly add the uniformly mixed deionized water and nitric acid as a catalyst into the three-necked flask, and continue stirring for 30 minutes to obtain liquid A;

[0120] (2) Under the condition of stirring at 35°C, silicone oil (polydimethylsiloxane, commercially purchased from Shanghai Kaishida Chemical Co., Ltd., model No. PMX-200 silicone oil, 0.65-2cSt) was slowly added to liquid A, and continued to stir for 30 minutes to obtain liquid B;

[0121] (3) Under the condition of stirring at 35°C, mix tetramethoxysilane, phenyltriethoxysilane and dimethyldiethoxysilane as alkoxysilane evenly, and then mix the evenly mixed alkoxysilane Slowly add silane into liquid B, raise the temperature to 50°C and continue to stir for 3 hours, then stop stirring, age at 70°C for 5 days, and obtain hydroxyl-rich chain...

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Abstract

The present invention relates to chain or meshed colloidal silica, super hydrophilic self-cleaning anti-reflection coating liquid and a preparation application. The colloidal silica is obtained by reaction of raw materials containing a solvent, water, a catalyst, a stabilizer and two or more alkoxysilane. According to the present invention, the coating liquid is obtained by combination of spherical colloidal silica with the hydroxyl chain or meshed colloidal silica and at least one selected from a coupling agent and a cross-linking agent. When the coating liquid is applied to the photovoltaic glass, the surface of the photovoltaic glass is coated, wherein the coating has a relatively high porosity and high light transmittance, and gain on the power of the photovoltaic modules is obvious. The anti-reflection coating is firmly bonded with the glass substrate, and the coating is high in hardness, and excellent in weather resistance performance, thereby having industrial application value.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a glass antireflection coating solution and its preparation and application. Background technique [0002] Appropriate anti-reflection coatings on the surface of optical components can reduce the reflection loss on the surface of optical components. For example, anti-reflective glass coated with coating solution on the surface of glass can be used in many fields. For example, the protective glass panel used for solar cells can improve the power generation efficiency of solar cells, and the protective glass used for displays can improve the display effect and energy saving. [0003] At present, the sol-gel method is the most commonly used method for preparing photovoltaic glass coating solutions. Specifically, silicon alkoxide is catalyzed by acid or alkali, and the silica sol is prepared after a period of hydrolysis or polymerization. The silica sol prepared by acid catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/22C09D1/00C09D7/12C01B33/14
Inventor 陈刚宋辉纪朋远王科刘明刚唐高山
Owner CSG HOLDING
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