Preparation method of polyimide quantum dot backlight film

A polyimide, quantum dot technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as unfavorable long-term use, and achieve the effects of excellent bending resistance, good mechanical properties, and wide applicable temperature.

Inactive Publication Date: 2018-06-01
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These resins have better light transmittance, which can ensure that the light emitted by quantum dots is better emitted to the backlight film. However, the films prepared with them are sensitive to light, heat, water, oxygen and other factors, which is not conducive to long-term development. time use

Method used

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  • Preparation method of polyimide quantum dot backlight film
  • Preparation method of polyimide quantum dot backlight film
  • Preparation method of polyimide quantum dot backlight film

Examples

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Effect test

Embodiment 1

[0042] A preparation method for a polyimide quantum dot backlight film, comprising the steps of:

[0043] 1) Introduce nitrogen gas into a 250mL three-neck flask equipped with a mechanical stirring device, first add 2.9112g (0.0091mol) 2,2'-bis(trifluoromethyl)diaminobiphenyl and 0.2422g (0.0009mol)1, Mixed diamines of 1'-bis(4-aminophenyl)cyclohexane followed by 62.56 g of ionic liquid 1,3-bis(2-methoxy-2-oxoethyl)imidazole tetrafluoroborate . Turn on the mechanical stirring and heat to make it dissolve. At this time, the temperature of the mixed solution in the three-neck flask is not higher than 50°C. After the mixed diamine is completely dissolved, add 3.1021g (0.01mol) 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride into the three-necked flask, stir for 10min, squeeze the nitrogen bag to make the three-necked flask Remove as much air as possible. The mixture in the three-necked flask was slowly heated up to 180° C., stirred at a constant temperature of 180° C. for...

Embodiment 2

[0047] A preparation method for a polyimide quantum dot backlight film, comprising the steps of:

[0048] 1) Introduce nitrogen gas into a 250mL three-neck flask equipped with a mechanical stirring device, first add 2.9112g (0.0091mol) 2,2'-bis(trifluoromethyl)diaminobiphenyl and 0.2422g (0.0009mol)1, Mixed diamines of 1'-bis(4-aminophenyl)cyclohexane followed by 62.56 g of ionic liquid 1,3-bis(2-methoxy-2-oxoethyl)imidazole tetrafluoroborate . Turn on the mechanical stirring and heat to make it dissolve. At this time, the temperature of the mixed solution in the three-neck flask is not higher than 50°C. After the mixed diamine is completely dissolved, add 3.1021g (0.01mol) 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride into the three-necked flask, stir for 10min, squeeze the nitrogen bag to make the three-necked flask Remove as much air as possible. The mixture in the three-necked flask was slowly heated up to 180° C., stirred at a constant temperature of 180° C. for...

Embodiment 3

[0052] A preparation method for a polyimide quantum dot backlight film, comprising the steps of:

[0053] 1) Introduce nitrogen gas into a 250mL three-neck flask equipped with a mechanical stirring device, first add 2.9112g (0.0091mol) 2,2'-bis(trifluoromethyl)diaminobiphenyl and 0.2422g (0.0009mol)1, Mixed diamines of 1'-bis(4-aminophenyl)cyclohexane followed by 62.56 g of ionic liquid 1,3-bis(2-methoxy-2-oxoethyl)imidazole tetrafluoroborate . Turn on the mechanical stirring and heat to make it dissolve. At this time, the temperature of the mixed solution in the three-neck flask is not higher than 50°C. After the mixed diamine is completely dissolved, add 3.1021g (0.01mol) 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride into the three-necked flask, stir for 10min, squeeze the nitrogen bag to make the three-necked flask Remove as much air as possible. The mixture in the three-necked flask was slowly heated up to 180° C., stirred at a constant temperature of 180° C. for...

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Abstract

The invention discloses a preparation method a polyimide quantum dot backlight film. The method comprises the following steps: 1) preparing a transparent polyimide pre-polymer: firstly, carrying out polymerization reaction on dianhydride and diamine in ionic liquid to obtain a polyimide pre-polymer solution; mixing the obtained polyimide pre-polymer solution with a precipitant; after filtering, carrying out drying treatment on sediment to obtain polyimide pre-polymer powder; then dissolving the polyimide pre-polymer powder into a polar solution to obtain polyimide pre-polymer gel; 2) doping quantum dots: adding red and green quantum dots into the polyimide pre-polymer gel and sufficiently stirring and mixing to obtain polyimide gel containing the red and green quantum dots; 3) curing to form a film: spreading the polyimide gel on a substrate and curing through a heating manner to finally form the polyimide quantum dot backlight film. According to the preparation method disclosed by theinvention, polyimide with strong weather resistance is used as a dispersion substrate of the quantum dots, and the light, heat, water and oxygen stability of the quantum dot backlight film can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of polyimide, in particular to a method for preparing a polyimide quantum dot backlight film. Background technique [0002] The backlight film is an indispensable and important component of light-emitting diode display devices (LED) or liquid crystal display devices (LCD). Its main function is to receive high-energy photons from the blue backlight and convert part of them into yellow light. Mixed with the unabsorbed blue light of the backlight to obtain white light, the white light passes through the functional layers such as liquid crystal layer and filter to realize the emission of the three primary colors of red, green and blue, and finally realizes color display. In traditional display terminals (including TVs, mobile phones, computers, etc.), the backlight module generally uses blue chips as the backlight source, and yellow phosphors are dispersed in common plastic substrates (such as PET, etc.) as the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K3/30C08K3/32C08J5/18C08G73/10G02F1/13357
CPCC08G73/1007C08G73/1057C08G73/1071C08J5/18C08J2379/08C08K3/30C08K3/32C08K2003/3027C08K2003/3036G02F1/1336G02F1/133614
Inventor 刘继延肖标尤庆亮
Owner JIANGHAN UNIVERSITY
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