Preparation method and application of high-refractive-index nano-zirconia composite resin

A technology of nano-zirconia and composite resin, which is applied in the field of optical films, can solve the problems of luminance loss, lower backlight efficiency, and easy deflection of light, and achieve the effect of reducing luminance loss and improving the degree of light concentration

Pending Publication Date: 2022-01-11
DONGGUAN GUANGZHI PHOTOELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the refractive index is lower, the light is more likely to be deflected, resulting in reflections on the polarizer between the backlight modules, resulting in luminance loss and reducing the backlight efficiency
[0004] At present, improving the refractive index of optical films has become the most important research topic for brightness enhancement films. Inorganic nano oxides have high refractive index, but the dispersion of inorganic nano oxide particles in acrylate resin is poor, so it is difficult to make a brightness enhancement prism structure. (brightness enhancement film)

Method used

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  • Preparation method and application of high-refractive-index nano-zirconia composite resin
  • Preparation method and application of high-refractive-index nano-zirconia composite resin

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of high refractive index nano zirconia composite resin, its preparation method comprises the following steps:

[0026] (1) Take ZrOCl 2 ·8H 2 O is dissolved in deionized water to obtain a 0.5mol / L zirconium oxychloride solution, adding NaOH to adjust the pH value to 10, adding glycerol, and the amount of glycerin added is ZrOCl 2 ·8H 2 0.5wt.% of the mass of O, stirred evenly, placed in a hydrothermal reaction kettle, reacted at 180°C for 24 hours, cooled to room temperature, took out the precipitate after centrifugation, and added H 3 PO 4 Adjust the pH value to 7, then add 25wt.% ethanol and leave it for 16 hours, centrifuge, wash with water, wash with ethanol, and spray powder to dry to obtain tetragonal zirconia powder with a particle size of 4nm;

[0027] (2) 75 parts by weight of tetragonal zirconia powder, 0.1 parts by weight of octadecyltrimethylammonium chloride and 800 parts by weight of deionized water are ultrasonically oscillated for 1 hour, and ...

Embodiment 2

[0030] The difference between Example 2 and Example 1 is that 14.06 g of modified tetragonal zirconia powder prepared in step (2) was dispersed into 30 mL of ethyl acrylate monomer to obtain a high refractive index nano-zirconia composite resin material.

Embodiment 3

[0032] The difference between Example 3 and Example 1 is that 17.24 g of modified tetragonal zirconia powder prepared in step (2) was dispersed into 30 mL of ethyl acrylate monomer to obtain a high refractive index nano-zirconia composite resin material.

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Abstract

The invention discloses high-refractive-index nano zirconia composite resin. A preparation method of the high-refractive-index nano zirconia composite resin comprises the following steps of: (1) preparing nano tetragonal zirconia powder by a hydrothermal method; (2) adding a cationic surfactant in the modification process of the tetragonal zirconia, enabling the surfaces of the tetragonal zirconia particles to absorb hydroxyl to the greatest extent in a Ca (OH) 2 alkaline environment, adding acrylic acid to neutralize part of Ca (OH) 2, and meanwhile, carrying out esterification reaction with the hydroxyl on the surfaces of the tetragonal zirconia particles under the catalysis of concentrated sulfuric acid; and (3) dispersing the prepared modified tetragonal zirconium oxide powder into an acrylate monomer to obtain the high-refractive-index nano zirconium oxide composite resin material, and the refractive index being as high as 1.68. The high-refractive-index nano zirconium oxide composite resin material disclosed by the invention is used for preparing a brightness enhancement film in a liquid crystal backlight module, so that the condensation degree of a prism on the brightness enhancement film is improved, and the brightness loss is reduced.

Description

technical field [0001] The invention relates to the technical field of optical films, in particular to a preparation method and application of a high refractive index nano-zirconia composite resin. Background technique [0002] Liquid crystal display panels have been widely used in the display screens of computers, mobile phones, televisions, navigators, digital cameras and some instruments. Since the liquid crystal panel itself does not emit light, the backlight module, as one of the key components of the liquid crystal display panel, plays a role in providing sufficient brightness and uniform light. The basic composition of the backlight module except the light source includes: reflective film, light guide plate, diffusion film and brightness enhancement film from bottom to top. After the backlight passes through the brightness-enhancing film with a prism structure from below, the light is concentrated and then enters the liquid crystal module. At this time, the optical r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/18C08F220/20C08J5/18C08L51/10C01G25/02G02F1/13357
CPCC08F292/00C08J5/18C01G25/02G02F1/133606C08J2351/10C08F220/1802C08F220/20
Inventor 邓建东陈明源
Owner DONGGUAN GUANGZHI PHOTOELECTRIC CO LTD
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