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A quantum dot polymer compound and its preparation method

A quantum dot and polymer technology, applied in the field of quantum dot polymer composite preparation, can solve the problems of quantum dot surface defects, aging, peeling, etc., and achieve the effect of improving aging resistance and ensuring aging resistance.

Active Publication Date: 2021-12-28
广纳珈源(广州)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the present invention is: in the quantum dot polymer compound prepared by the existing preparation technology, the quantum dot surface ligands fall off during the processing together with the polymer material; at the same time, the polymer material is solid at normal temperature, and the The surface ligands cannot return to the surface of the quantum dots, resulting in the formation of defects on the surface of the quantum dots, and the aging of the quantum dots with a significant decrease in brightness under the conditions of high temperature, high humidity and blue light

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  • A quantum dot polymer compound and its preparation method
  • A quantum dot polymer compound and its preparation method
  • A quantum dot polymer compound and its preparation method

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preparation example Construction

[0031] In order to solve the above technical problems, the present invention provides a method for preparing a quantum dot polymer compound, which is used to prepare a quantum dot polymer compound that does not cause ligand shedding. figure 1 shown, including the following steps:

[0032] Mix oil-soluble quantum dots, polymer materials, thiol-ene polymers and additives uniformly at processing temperature, and form quantum dot polymer composites after returning to room temperature.

[0033]In this embodiment, polymer materials are used as the environment, different ligand materials and quantum dot materials are put in, different ligand exchanges are performed on the surface of quantum dots, and finally a highly stable quantum dot polymer composite material is obtained.

[0034] Specifically, the quantum dots are oil-soluble quantum dots, which can be selected from any one of the first compounds formed by elements in the II main group and the VI main group, the III main group an...

Embodiment approach 1

[0056] The ethanol solution was put into the quantum dot solution, and the volume ratio of ethanol to the quantum dot solution was 1:0.5, and centrifuged for 1 min to obtain the quantum dot material. 90% oleylamine and 10% oleic acid are used as surface ligands when the quantum dot material is prepared. Stir and mix polystyrene and quantum dot materials, thiol-ene polymer, dibutylhydroxytoluene and bis-2,2,6,6-tetramethylpiperidinol sebacate, and add them together to Mix in the screw extruder to form a mixture, wherein the mass ratio of quantum dots to the mixture is 5%, the mass ratio of the thiol-ene polymer to the mixture is 10%, and the mass ratio of dibutylhydroxytoluene to the mixture is 5%, The mass ratio of bis-2,2,6,6-tetramethylpiperidinol sebacate is 5%, the extrusion time is 300 seconds, and the average processing temperature is 180°C. After extrusion, cool to room temperature to form Solid quantum dot polymer composite.

[0057] The above-mentioned quantum dot p...

Embodiment approach 2

[0059] The ethanol solution was put into the quantum dot solution, and the volume ratio of ethanol to the quantum dot solution was 1:3, and centrifuged for 15 minutes to obtain the quantum dot material. Among them, 10% oleylamine, 50% oleic acid and 40% TOPO were put into the preparation of the quantum dot material as surface ligands.

[0060] Add polycarbonate, quantum dot material, thiol-ene polymer, tert-butyl hydroquinone and 2-(2-hydroxy-5-methyl-phenyl)-2H-benzotriazole to the extruder Mixing in the machine to form a mixture, wherein the mass ratio of quantum dots to the mixture is 0.01%, the mass ratio of thiol-ene polymer to the mixture is 0.1%, the mass ratio of dibutylhydroxytoluene to the mixture is 0.05%, and decane The mass ratio of bis-2,2,6,6-tetramethylpiperidinol ester is 0.05%, the extrusion time is 30 seconds, the average processing temperature is 350°C, and the solid quantum dots are formed after extrusion and cooled to room temperature. molecular complex....

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Abstract

The invention provides a quantum dot macromolecular compound and a preparation method thereof, the preparation method comprising uniformly mixing oil-soluble quantum dots, a macromolecule material, a thiol-ene polymer and an auxiliary agent at a processing temperature, and returning to After room temperature, the quantum dot polymer complex is formed. The present invention takes the polymer material as the environment, puts in different ligand materials and quantum dot materials, performs different ligand exchanges on the surface of the quantum dots, and finally obtains a high-stability quantum dot polymer composite material, because the surface thiol-ene The polymer is well adsorbed on the surface of the quantum dots. At the same time, the molecular chain segments between the ligands are long and will be entangled with each other to further form a barrier, which can more effectively prevent the ligands from falling off, and better protect the quantum dot materials, making the quantum dots Under the conditions of high temperature, high humidity and blue light, the fluorescent brightness of the dot polymer composite will not be significantly attenuated, which slows down the aging of quantum dots and improves the optical stability of the quantum dot optical function board.

Description

technical field [0001] The invention relates to the technical field of preparation of quantum dot polymer composites, in particular to a quantum dot polymer composite and a preparation method thereof. Background technique [0002] Quantum dot polymer composites made by mixing quantum dots and polymer materials are mostly used in display fields such as televisions and display screens. However, the quantum dot polymer composite prepared by the existing preparation technology has been tested through use and found that: the wavelength and peak width of the quantum dots in the composite have not changed, but the fluorescence brightness of the composite under the conditions of high temperature, high humidity and blue light Significant attenuation and aging of quantum dots occur, indicating that the inorganic structure of the core of quantum dots in polymer materials has not changed, while the ligands on the surface of quantum dots fall off during processing with polymer materials;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08L33/12C08L69/00C08L25/14C08L67/02C08L23/12C08L27/06C08K9/04C08K3/01C08K5/13C08K5/3435C08K5/3475
CPCC08K9/08C08K3/01C08K5/13C08K5/3435C08K5/3475C08L2201/08C08L25/06C08L69/00
Inventor 庞代文徐越朱小波郭三维朱东亮董博然
Owner 广纳珈源(广州)科技有限公司
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