Porous anti-reflection film composed of nano-silica hollow particles and preparation method thereof

A nano-silica, anti-reflection technology, applied in the field of porous anti-reflection film and its preparation, can solve the problems of poor mechanical properties, and achieve the effect of overcoming poor mechanical properties, high mechanical strength and scrub resistance, and simple preparation process

Active Publication Date: 2016-04-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, by adjusting the concentration of the aqueous dispersion of nano-silica particles, the pH value and immersion time in the self-assembly process, a porous anti-reflection film formed by densely arranged nano-silica hollow particles can be obtained, and the pore structure Most of the closed-pore structure is composed of hollow nano-silica hollow particles, the skeleton is a silica shell, and the adhesion between the particles and the substrate is strengthened by heat treatment, so the porous anti-reflection film formed It has high mechanical strength and scrub resistance, which can effectively overcome the poor mechanical properties of the current porous anti-reflection film

Method used

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  • Porous anti-reflection film composed of nano-silica hollow particles and preparation method thereof
  • Porous anti-reflection film composed of nano-silica hollow particles and preparation method thereof
  • Porous anti-reflection film composed of nano-silica hollow particles and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) The preparation method of nano-silica hollow particles is as follows:

[0038] Weigh 0.8g of polyacrylic acid aqueous solution with a mass fraction of 30%, dissolve it in 4ml of ammonia water with a mass fraction of 28%, and add 140mL of absolute ethanol to mix. After stirring evenly, drop it with a pipette every 1 hour Add 1ml of tetraethyl orthosilicate, add dropwise 3 times in total, after the dropwise addition, continue to stir for 12 hours, and obtain nanoparticles with polyacrylic acid as the core and silicon dioxide as the shell after suction filtration. Finally, the obtained nanoparticles are centrifuged and washed four times successively with absolute ethanol and deionized water to remove the polyacrylic acid in the core part of the nanoparticles, so as to obtain the nano-silica hollow particles.

[0039] Observing the morphology of the obtained nano silicon dioxide hollow particles by transmission electron microscope, the results are as follows figure 1 s...

Embodiment 2

[0048] Weigh 0.4g of polyacrylic acid aqueous solution with a mass fraction of 30%, dissolve it in 4ml of ammonia water with a mass fraction of 28%, and add 140ml of absolute ethanol for mixing. After stirring evenly, drop it with a pipette every 1 hour Add 0.5ml of tetraethyl orthosilicate, add dropwise 3 times in total, after dropwise addition, continue to stir for 12 hours and then filter with suction to obtain nanoparticles with polyacrylic acid as the core and silicon dioxide as the shell. Finally, the obtained nanoparticles are centrifuged and washed four times successively with absolute ethanol and deionized water to remove the polyacrylic acid in the core part of the nanoparticles, so as to obtain the nano-silica hollow particles.

[0049] According to the statistical results of the particle diameters in the transmission electron microscope pictures, the average diameter of the prepared nano-silica hollow particles is 73nm, and the cavity volume fraction is 0.43.

Embodiment 3

[0051] Weigh 0.6g of polyacrylic acid aqueous solution with a mass fraction of 30%, dissolve it in 4ml of ammonia water with a mass fraction of 28% to fully dissolve, add 140ml of absolute ethanol to mix, stir well and drop it with a pipette every 1 hour Add 0.75ml of tetraethyl orthosilicate, add dropwise 3 times in total, after dropwise addition, continue to stir for 12 hours and then filter with suction to obtain nanoparticles with polyacrylic acid as the core and silicon dioxide as the shell. Finally, the obtained nanoparticles are centrifuged and washed four times successively with absolute ethanol and deionized water to remove the polyacrylic acid in the core part of the nanoparticles, so as to obtain the nano-silica hollow particles. According to the statistical results of the particle diameters in the transmission electron microscope pictures, the average diameter of the prepared nano-silica hollow particles is 87nm, and the cavity volume fraction is 0.45.

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Abstract

The invention discloses a porous antireflection film consisting of nanosilicon dioxide hollow particles and a preparation method of the film. The preparation comprises the following steps: preparing the nanosilicon dioxide hollow particles into 0.5-3% aqueous dispersion with the concentration, forming films on both sides of a substrate by using a one-step self-assembling method, and performing high-temperature treatment on the films so as to obtain the porous antireflection film consisting of the nanosilicon dioxide hollow particles. The light transmittance of the substrate is remarkably improved. The one-step self-assembling process is efficient and environmentally friendly, the substrate is wide in option range, the thickness and the refractive index of the porous antireflection film can be precisely adjusted by adjusting the particle size and the cavity volume fraction of the nanosilicon dioxide hollow particles, and the prepared porous antireflection film is good in mechanical strength and scrubbing resistance.

Description

(1) Technical field [0001] The invention relates to a porous anti-reflection film composed of nano silicon dioxide hollow particles and a preparation method thereof. (2) Background technology [0002] Anti-reflection coating (Anti-reflection coating) can reduce or eliminate the reflection of light on the interface composed of two different refractive indices, thereby enhancing the light transmittance and eliminating some unnecessary reflected light and glare. It has important application value and development prospect in the fields of liquid crystal display, digital camera lens and optical components. Under the guidance of the sustainable development strategy, solar cells, as one of the new energy sources, are being widely used in various fields. Coupled with the rapid development of electronic products in the information age in the 21st century, the demand for anti-reflective films is increasing, and the demand for anti-reflective films The preparation technology and perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23
Inventor 孙志娟蒋春跃
Owner ZHEJIANG UNIV OF TECH
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