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Highly-dispersed quantum dot injection molding plastic grains and preparation method thereof

A high-dispersity, quantum dot technology, used in the field of display and lighting, can solve the problems of high storage environment requirements, fluorescence quenching inactivation, affecting optical effects, etc., to achieve good stability, stable performance, and improved yield.

Active Publication Date: 2019-04-26
厦门市米宫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the doping process of quantum dots and various polymers will encounter many problems
For example, the complex process of quantum dots and some polymers requires a high temperature environment, which is easy to be deactivated by fluorescence quenching.
In addition, the composite process of quantum dots and polymers is prone to agglomeration, and the dispersion in the substrate is poor, which affects the overall optical effect
The original quantum dot optical devices need to process and adjust the quantum dots in the production process, the production threshold is too high, and the raw materials are complex, and the requirements for the storage environment are high.

Method used

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  • Highly-dispersed quantum dot injection molding plastic grains and preparation method thereof

Examples

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preparation example Construction

[0045] A kind of preparation method of high dispersion quantum dot 2 injection plastic rice, comprises the following steps:

[0046] Step 1: Surface modification of quantum dots 2, subjecting quantum dots 2 to high temperature resistance treatment;

[0047] Step 2: Composite ingredients, fully mix the surface-modified quantum dots 2 and dispersant 3, and then add them to the high polymer monomer for pre-polymerization;

[0048] Step 3: extrusion molding, extruding and cutting the pre-polymerized material into 2-injection plastic rice containing highly dispersed quantum dots.

[0049] The specific methods of the step one include:

[0050] Mix the quantum dots 2 with the high-temperature-resistant ligand, stir the mixture and place it in an ultrasonic instrument to fully disperse it;

[0051] The mixed liquid is then transferred to the flask and continuously stirred until the reaction stops;

[0052] Finally, transfer the mixture to a watch glass to evaporate excess solvent, an...

Embodiment 1

[0061] 1. Stearic acid and Al in equimolar ratio 2 o 3 Add it to a high-pressure reactor, and control the reaction at 200 ° C for 12 hours. After 12 hours, the reaction was stopped, and after cooling down to room temperature, it was transferred to an oven at 60°C to devolatilize part of the unreacted solvent to obtain a high-temperature-resistant ligand.

[0062] Add quantum dots with a mass ratio of 20% to a certain amount of high-temperature-resistant ligand and mix, stir the mixed solution and place it in an ultrasonic instrument to fully disperse it;

[0063] The mixed liquid is then transferred to the flask and continuously stirred until the reaction stops;

[0064] Finally, transfer the mixture to a watch glass to evaporate excess solvent, and bake until dry powder is obtained.

[0065] 2. Add 100 mg of quantum dot powder obtained after drying to 1 g of stearic acid amide, and stir and mix evenly;

[0066] 10kg of methyl methacrylate was pre-added in the reactor, and...

Embodiment 2

[0069] 1. Add stearic acid and SiC in an equimolar ratio to the autoclave, and control the reaction at 200°C for 12 hours. After 12 hours, the reaction was stopped, and after cooling down to room temperature, it was transferred to an oven at 60°C to devolatilize part of the unreacted solvent to obtain a high-temperature-resistant ligand.

[0070] Add quantum dots with a mass ratio of 20% to a certain amount of high-temperature-resistant ligand and mix, stir the mixed solution and place it in an ultrasonic instrument to fully disperse it;

[0071] The mixed liquid is then transferred to the flask and continuously stirred until the reaction stops;

[0072] Finally, transfer the mixture to a watch glass to evaporate excess solvent, and bake until dry powder is obtained.

[0073] 2. Add 250 mg of quantum dot powder obtained after drying to 25 g of erucamide, and stir and mix evenly;

[0074] 10kg of methyl methacrylate was pre-added into the reactor, and the mixture of quantum d...

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Abstract

The invention relates to highly-dispersed quantum dot injection molding plastic grains and a preparation method thereof. The plastic grains for injection molding, prepared by the preparation method, adopt a high-molecular polymer as a substrate and are solidified and formed by uniformly dispersing and compounding quantum dots in a certain proportion and concentration; the plastic grains with the uniformly-dispersed quantum dots can be used for injection molding into various forms of quantum dot light conversion devices. The highly-dispersed quantum dot injection molding plastic grains comprisethe high polymer substrate, the quantum dots uniformly dispersed in the high polymer substrate and a dispersing agent. The preparation method of the highly-dispersed quantum dot injection molding plastic grains comprises the following steps: step 1, quantum dot surface modification: performing high-temperature treatment on the quantum dots; step 2, compound blending: fully mixing the quantum dotsafter surface modification and the dispersing agent and then adding in a high polymer monomer for pre-polymerization; step 3, extrusion molding: extruding and cutting a pre-polymerized material intothe highly-dispersed quantum dot injection molding plastic grains.

Description

technical field [0001] The invention relates to the fields of display and lighting, in particular to a plastic meter injected with high-dispersion quantum dots and a preparation method thereof. Background technique [0002] Nowadays, display and lighting equipment using LEDs as light sources are very popular. Traditional white LEDs use blue LEDs plus yellow phosphors. In terms of spectral distribution, the blue part is relatively pure, while the green and red parts have no obvious peaks, and the saturation of red and green in the imaging spectrum is not high. . However, the red, green and blue three-color light peaks of quantum dot backlight are obvious, and the color saturation after imaging is also high. Moreover, quantum dots are tunable in size. Quantum dots with different particle sizes correspond to light with different emission wavelengths. Therefore, devices based on quantum dots can effectively improve the color gamut level of display devices as a backlight sour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/14C08F120/18C08G63/195C08K9/04C08K9/02
CPCC08F120/14C08F120/18C08G63/195C08K9/02C08K9/04
Inventor 吴敬伟黄明鹭王翔
Owner 厦门市米宫科技有限公司
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