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Novel optical material for display and preparation method of novel optical material

An optical material and a technology for display, applied in the field of new optical materials for display and its preparation, can solve the problems of heavy weight, complicated preparation process, and inconformity with the development direction of ultra-thin liquid crystal display, and achieve good thermal stability and Effects of mechanical properties, improvement of flexibility and hydrophobicity, good light diffusion effect

Inactive Publication Date: 2018-12-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 201410193176.3 discloses a method for preparing a light-diffusing film. In this patent, a light-diffusing film with higher luminance is obtained by means of double-sided corona and superimposed treatment. However, the addition of a light-diffusing agent in this preparation method The amount is large, resulting in high light loss and heavy weight of the backlight module; Chinese patent 200910254398.0 discloses a light diffusion film and its preparation method. The light diffusion film is composed of two diffusion layers, which can better achieve high Haze and high light transmittance, but the preparation method is complicated and difficult to popularize and use; Chinese patent 2017208388345.3 discloses a diffusion composite film for LCD backlight modules, and the diffusion composite film is obtained by compounding the diffusion film and the prism film film, but the thickness of the diffusion composite film is relatively large, which does not meet the current development direction of ultra-thin liquid crystal display

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] At 25°C, add 5g of 1-vinylimidazole, 100g of distilled water, and 1g of polyvinylpyrrolidone (weight-average molecular weight: 1500) into the reaction kettle, then add 1g of zirconium nitrate, stir at room temperature for 3 hours, then filter, share 70g of distilled water for 3 times After washing and vacuum drying at 50°C for 20 h, copolymerizable zirconium organic framework compounds (zirconium MOFs) with regular triangular prism structure were obtained. 25°C, N 2 Under the atmosphere, add 20g of isobornyl methacrylate, 100g of toluene, and 1g of the zirconium MOFs prepared above into the reaction kettle, and after mixing, add dropwise 1g of toluene with a mass percentage of 2wt% azobisisobutyronitrile solution, after 1 hour of dripping, the temperature was raised to 80°C for 6 hours, and after cooling down to room temperature, 150g of methanol was added to the reaction kettle, filtered, and 50g of methanol was used to wash the filter cake 3 times, and vacuum-dried at...

Embodiment 2

[0033] At 25°C, add 10g of 1-(3,5-divinylphenyl)imidazole, 200g of distilled water, and 1g of polyvinylpyrrolidone (weight-average molecular weight: 2000) into the reaction kettle, then add 4g of zirconium nitrate, and stir at room temperature for 6h After filtering, wash with 100g of distilled water for 5 times, and vacuum dry at 70°C for 12h to obtain zirconium MOFs. At 25°C, N 2 Under the atmosphere, add 40g of cyclohexyl methacrylate, 150g of toluene, and 1g of the above-prepared zirconium MOFs into the reactor, mix well and add dropwise 8g of dimethyl azobisisobutyrate with a concentration of 5wt%. After dropping the toluene solution for 2 hours, raise the temperature to 90°C and react for 3 hours, then add 200g of methanol to the reaction kettle after cooling down to room temperature, filter, wash with 80g of methanol for 5 times, and vacuum-dry at 100°C for 12h to obtain a new type of display. Material.

[0034]The visible light transmittance of the above-mentioned no...

Embodiment 3

[0036] At 25°C, add 8g of 1-vinylimidazole, 150g of distilled water, and 1g of polyvinylpyrrolidone (weight-average molecular weight: 1500) into the reaction kettle, then add 2g of zirconium sulfate, stir at room temperature for 5 hours and filter, share 85g of distilled water for 4 times Wash and dry in vacuum at 60°C for 20 hours to obtain zirconium MOFs. At 25°C, N 2 Under the atmosphere, add 30g of isobornyl methacrylate, 130g of toluene, and 1g of the zirconium MOFs prepared above into the reaction kettle, and after mixing, add dropwise 5g of toluene with a mass percentage of 4wt% azobisisobutyronitrile After 1.5 hours of dripping, the temperature was raised to 85°C and reacted for 4.5 hours. After cooling down to room temperature, 180g of methanol was added to the reaction kettle, filtered, and a total of 65g of methanol was washed for 4 times, and vacuum-dried at 95°C for 18h to obtain a new type of display. Material.

[0037] The visible light transmittance of the ab...

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Abstract

The invention discloses a novel optical material for display and a preparation method of the novel optical material. The optical material is of a regular triangular prism structure and shows a core-shell structure in micromorphology. The core of the optical material is a surface copolymerized zirconium organic framework compound with the regular triangular prism structure; the framework height is100 to 200 nm, the side length of a bottom regular triangle is 50 to 100 nm, the shell is a copolymer of N imidazole containing double bonds and acrylate monomer and the thickness is 300 to 500 nm. The optical material is prepared by firstly preparing a copolymerizable zirconium organic framework compound with the regular triangular prism structure through N imidazole ligand containing double bonds and zirconium salt, and then carrying out free radical polymerization on the copolymerizable zirconium organic framework compound and the acrylate monomer, wherein a copolymer shell layer is formedby copolymerization of the N imidazole ligand containing the double bonds and the acrylate monomer. When the optical material has a better optical diffusion effect through an optical diffusion film prepared by ultraviolet curing; the visible light transmittance of the optical diffusion film is 92 to 95 percent and the haze is 85 to 88 percent; meanwhile, the optical material has good thermal stability and mechanical properties.

Description

technical field [0001] The invention relates to a novel optical material for display and a preparation method thereof, belonging to the technical field of photoelectric functional material preparation. Background technique [0002] A liquid crystal display device is usually composed of a liquid crystal panel and a backlight module. As an important basic component of the backlight module, the light diffusion film can convert a point light source or a line light source into a uniform surface light source, eliminate strong light spots, and thus achieve the brightness and light intensity of the liquid crystal panel. Uniform effect. According to different diffusion mechanisms, light diffusion films can be divided into surface relief type diffusion films and particle addition type diffusion films. The surface relief type light diffusion film has the advantage of high visible light transmittance, but its low haze and complicated preparation process limit its application; the parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F230/04G02B5/02
CPCC08F220/18C08F220/1806G02B5/02C08F230/04
Inventor 周钰明钟熙胡金刚卜小海王泳娟何曼张雯君徐晓东
Owner SOUTHEAST UNIV
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