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Optical diffusion film and manufacturing method thereof

A technology of optical diffusion and light diffusion, which is applied in optics, optical components, nonlinear optics, etc., can solve the problems of dazzling retina, high light transmittance, and easy agglomeration, so as to prevent irritation and damage, improve diffusion performance, and durable sex good effect

Active Publication Date: 2020-07-10
合肥星宸新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic light-diffusing particles have high light transmittance. Ultraviolet light and short-wave blue light of 400nm to 480nm can directly pass through the diffusing particles, which can easily cause glare and retinal radiation damage. Inorganic particles have poor dispersion in the resin and are prone to agglomeration. Affect the stability and quality of the diffusion membrane

Method used

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  • Optical diffusion film and manufacturing method thereof
  • Optical diffusion film and manufacturing method thereof
  • Optical diffusion film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] S1: Preparation of core-shell light-diffusing microspheres: 0.5mol / L H 2 SO 4 Add the solution to 1000mL of 35% (v / v) ethanol solution, adjust the pH to 3.5, add 20mL of aminopropyltrimethoxysilane, 10mL of vinyltrimethoxysilane, 5mL of phenyltriethoxysilane, and magnetically Stir the reaction for 3 hours, then add 0.2mol / L NaOH solution to adjust the pH to 10, and continue the reaction for 3 hours to obtain a suspension of silicone microspheres;

[0028] Then add 1g Zn(NO 3 ) 2 ·6H 2 O, 2g Ce(NO 3 ) 3 ·6H 2 O, 1g Al(NO 3 ) 3 9H 2 O. 8g of hexamethylenetetramine, magnetically stirred for 0.5h, refluxed at 80°C for 3h, lowered to 40°C, added dropwise with 15mL glutaraldehyde for cross-linking modification for 1h, after cooling down to room temperature, centrifuged to collect the precipitate, and deionized Alternately washed twice with water and ethanol, and vacuum dried to obtain core-shell light-diffusing microspheres;

[0029] S2: Preparation of light-diffus...

Embodiment 2

[0032] S1: Preparation of core-shell light-diffusing microspheres: 1.5mol / L H 2 SO 4 Add the solution into 1000mL of 35-50% (v / v) ethanol solution, adjust the pH to 4.0, add 25mL of aminopropyltrimethoxysilane, 15mL of vinyltrimethoxysilane, and 7.5mL of phenyltriethoxysilane, Stir at 30°C for 4 hours, then add 0.5mol / L NaOH solution to adjust the pH to 10, and continue the reaction for 6 hours to obtain a suspension of silicone microspheres;

[0033] Add 1.5g Zn(NO 3 ) 2 ·6H 2 O, 2.5gCe(NO 3 ) 3 ·6H 2 O, 1.5gAl(NO 3 ) 3 9H 2 O. 10g of hexamethylenetetramine, magnetically stirred for 1h, refluxed at 80°C for 4h, lowered to 45°C, added dropwise with 20mL of glutaraldehyde for cross-linking modification for 1-2h, after cooling down to room temperature, centrifuged to collect the precipitate, and used Alternate washing with ionized water and ethanol for 2 to 3 times, and vacuum drying to obtain core-shell light-diffusing microspheres;

[0034] S2: Prepare the light-dif...

Embodiment 3

[0037] S1: Preparation of core-shell light-diffusing microspheres: 2mol / L H 2 SO 4 Add the solution to 1000mL of 35-50% (v / v) ethanol solution, adjust the pH to 4.5, add 30mL aminopropyltrimethoxysilane, 20mL vinyltrimethoxysilane, 10mL phenyltriethoxysilane, 40 ℃ magnetic stirring reaction for 6 hours, then add 1mol / L NaOH solution to adjust the pH to 10, and continue the reaction for 8 hours to obtain a suspension of silicone microspheres;

[0038] Then add 2g Zn(NO 3 ) 2 ·6H 2 O, 3g Ce(NO 3 ) 3 ·6H 2 O, 2g Al(NO 3 ) 3 9H 2 O. 10g of hexamethylenetetramine, magnetically stirred for 1h, refluxed at 80°C for 5h, lowered to 50°C, added dropwise with 30mL of glutaraldehyde for cross-linking and modified for 2h, after cooling down to room temperature, centrifuged to take the precipitate, and deionized water Alternately washed with ethanol for 3 times, and dried in vacuum to obtain core-shell light-diffusing microspheres;

[0039] S2: Preparation of light-diffusing laye...

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Abstract

The invention discloses an optical diffusion film and a manufacturing method thereof. According to the optical diffusion film, a PET film serves as a base material, and a light diffusion layer is cured on the surface. The light diffusion layer is prepared from the following raw materials in parts by mass: 100 parts of urethane acrylate, 25-35 parts of tripropylene glycol diacrylate, 10-30 parts ofcore-shell type light diffusion microspheres and 1-3 parts of a photoinitiator. The preparation method of the core-shell type photodiffusion microsphere comprises the following steps: adjusting the pH value of the 35-50% (v / v) ethanol solution to 3.0-5.0; adding APS, VTMS and phenyltriethoxysilane into the mixture; magnetically stirring at 25-40 DEG C to react for 2-6 hours; adjusting the pH value to 9-11, continuously reacting for 3-8 hours, adding Zn(NO3)2.6H2O, Ce(NO3)3.6H2O, Al(NO3)3.9H2O and HTM, magnetically stirring for 0.5-1 hour, refluxing at 80 DEG C for 3-5 hours, cooling to 40-50DEG C, dropwise adding glutaraldehyde for cross-linking modification for 1-2 hours, centrifugally washing and drying. The optical diffusion film is uniform, stable, good in weather resistance and durability, the visible light transmittance reaches 93% or above, the haze reaches 85% or above, the ultraviolet light transmittance is lower than 12%, and the 400 nm-480 nm short-wave blue light transmittance is lower than 15%.

Description

technical field [0001] The invention belongs to the technical field of optical thin films, and in particular relates to an optical diffusion film and a manufacturing method thereof. Background technique [0002] The diffusion film mainly refers to the optical film used in the backlight system of the LCD module. The diffusion film uses high-transparency PET as the substrate, and uses acrylic resin to precisely coat a layer of randomly dispersed micron-structured diffusion particles on its surface. It is used in LCDs to cause multiple refraction, reflection and winding of light through the diffusion layer. The reflection phenomenon is used to modify the light into a uniform surface light source to achieve the effect of optical diffusion and make the light display more uniform and soft. [0003] Light diffusing agents are mainly divided into inorganic light diffusing agents and organic light diffusing agents. The former includes silicon oxide, aluminum oxide, titanium oxide, b...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02F1/13357
CPCG02B5/0226G02B5/0268G02F1/133606
Inventor 尹荣超王宽宽王图祥边帅李琳
Owner 合肥星宸新材料有限公司
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