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Preparation method for hydrophobic self-cleaning anti-reflection film with high hardness and super wear-resistance

A technology of super wear-resistant and anti-reflection film, applied in the direction of coating, etc., can solve the problem of light transmittance decline, and achieve the effects of low cost, simple preparation process, high hardness and refractive index

Active Publication Date: 2018-12-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Li et al. adopted NH 3 Thermal treatment and trimethylchlorosilane (TMCS) modification of dense and porous SiO 2 , the anti-reflection coating with a water contact angle of 135° was prepared, but the light transmittance has decreased by 0.12% after 100 scratches with alcohol cotton balls

Method used

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  • Preparation method for hydrophobic self-cleaning anti-reflection film with high hardness and super wear-resistance
  • Preparation method for hydrophobic self-cleaning anti-reflection film with high hardness and super wear-resistance
  • Preparation method for hydrophobic self-cleaning anti-reflection film with high hardness and super wear-resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]Preparation of AlO(OH) sol: use absolute ethanol as solvent and aluminum isopropoxide (purity ≥ 98%) as precursor, heat absolute ethanol to 80°C, stir at 600 rpm, Add aluminum isopropoxide about 1 / 400 of the number of solvent moles in one second, reflux and stir for 30 minutes, then heat up to 90°C, add concentrated nitric acid (HNO 3 , 36%), refluxed for 6 hours, cooled, then sealed and stored, and aged for 96 hours at room temperature to obtain a transparent and stable aluminum sol. The molar ratios of added absolute ethanol, aluminum isopropoxide, and nitric acid are 100:1:0.25, respectively.

[0030] Al-wisker / SiO2 2 Preparation of sol: take the prepared aluminum sol, add methyltriethoxysilane (MTES, 96%) and oxalic acid solution (0.01mol / L) drop by drop under stirring at 30°C, stir for 1h, and age at 30°C 5 days. The volume ratio of AlO(OH) sol, MTES and oxalic acid added is 5:1:0.5.

[0031] Al-wisker / SiO2 2 Preparation of the anti-reflection film: take high b...

Embodiment 2

[0033] Preparation of AlO(OH) sol: use absolute ethanol as solvent and aluminum isopropoxide (purity ≥ 98%) as precursor, heat absolute ethanol to 80°C, stir at 600 rpm, Add about 1 / 400 of the number of solvent moles in one second and slowly add aluminum isopropoxide, reflux and stir for 30 minutes, then raise the temperature to 90°C, add concentrated nitric acid (HNO 3 , 36%), refluxed for 6 hours, cooled, then sealed and stored, and aged for 96 hours at room temperature to obtain a transparent and stable aluminum sol. The molar ratios of added absolute ethanol, aluminum isopropoxide, and nitric acid are 100:1:0.25, respectively.

[0034] Al-wisker / SiO2 2 Preparation of sol: take the prepared aluminum sol, add methyltriethoxysilane (MTES, 96%) and oxalic acid solution (0.01mol / L) drop by drop under stirring at 30°C, stir for 1h, and age at 30°C 5 days. The volume ratio of AlO(OH) sol, MTES and oxalic acid added is 10:1:0.5.

[0035] Al-wisker / SiO2 2 Preparation of the an...

Embodiment 3

[0037] Preparation of AlO(OH) sol: use absolute ethanol as solvent and aluminum isopropoxide (purity ≥ 98%) as precursor, heat absolute ethanol to 80°C, stir at 600 rpm, Add aluminum isopropoxide about 1 / 400 of the number of solvent moles in one second, reflux and stir for 30 minutes, then heat up to 90°C, add concentrated nitric acid (HNO 3 , 36%), refluxed for 6 hours, cooled and sealed for storage, and aged for 96 hours at room temperature to obtain a transparent and stable aluminum sol. The molar ratios of added absolute ethanol, aluminum isopropoxide, and nitric acid are 100:1:0.25, respectively.

[0038] Al-wisker / SiO2 2 Preparation of sol: take the prepared aluminum sol, add methyltriethoxysilane (MTES, 96%) and oxalic acid solution (0.01mol / L) drop by drop under stirring at 30°C, stir for 1h, and age at 30°C 5 days. The volume ratio of AlO(OH) sol, MTES and oxalic acid added is 15:1:0.5.

[0039] Al-wisker / SiO2 2 Preparation of the anti-reflection film: take high ...

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Abstract

The invention belongs to the field of optical film materials, and relates to a uniform and stable sol prepared by cohydrolysis of hydrated aluminum sol and organosilane and containing a needle-like whisker structure, i.e. an Al-wisker / SiO2 sol, and a method for preparing a hydrophobic anti-reflection film with high hardness and super wear-resistance by the sol. A double-sided anti-reflection filmis plated on the surface of glass by the a drawing-dipping method of the sol, the average transmittance at 400-800 nm is 96% or more after calcination at 200-250 DEG C, a contact angle is 125 degree,the pencil hardness of the anti-reflection film is 5H, and the average light transmittance decreases by no more than 0.16% and a hydrophobic angle could still maintain a hydrophobic state of 120 degree or more after 1000 cycles of mechanical wiping by ethanol cotton balls.

Description

technical field [0001] The invention belongs to the field of optical thin film materials, and relates to a method for preparing a hydrophobic self-cleaning anti-reflection film with high hardness and super wear resistance. Background technique [0002] Anti-reflection film (also known as anti-reflection film or anti-reflection film or anti-reflection coating) plays an important role in new energy photovoltaic power generation and solar thermal power generation technology. It is used for anti-reflection film on the glass surface of solar photovoltaic and photothermal components. It can improve its photoelectric or photothermal efficiency. When photovoltaic modules are directly applied to photoelectric conversion, the loss of reflected light on their surface exceeds 30%, which fundamentally limits the photoelectric conversion efficiency. The use of anti-reflection film technology to reduce the sunlight reflection on the surface of the glass vacuum tube used in the solar therm...

Claims

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Application Information

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IPC IPC(8): C03C17/00
CPCC03C17/009C03C2217/29C03C2218/11C03C2218/111
Inventor 陈若愚李怡雯王红宁刘小华
Owner CHANGZHOU UNIV
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