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Quantum dot light diffusing agent and preparation method thereof

A light diffusing agent and quantum dot technology, applied in chemical instruments and methods, light guides, optics, etc., can solve problems such as poor stability and high cost, and achieve the effects of breaking through limitations, low equipment cost, and easy storage and transportation

Active Publication Date: 2020-01-03
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 present invention aims to solve to a certain extent the technical problems of poor stability and high cost in the prior art when quantum dots are applied to optical function boards

Method used

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  • Quantum dot light diffusing agent and preparation method thereof
  • Quantum dot light diffusing agent and preparation method thereof
  • Quantum dot light diffusing agent and preparation method thereof

Examples

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preparation example Construction

[0044] combine figure 1 Shown, a kind of preparation method of quantum dot light diffusing agent comprises steps:

[0045] S1, pretreating the polymethyl methacrylate to obtain a polymethyl methacrylate dispersion;

[0046] S2. Dissolving the quantum dots and additives in a co-solvent to obtain a mixed solution A;

[0047] S3. Mix the mixed solution A with the polymethyl methacrylate dispersion to obtain the mixed solution B. Under the protection of an inert gas, adjust the temperature and pH value of the mixed solution B, and carry out purification treatment after sufficient stirring to obtain the mixed solution containing quantum dots. microsphere structure;

[0048] S4, drying the microsphere structure, and obtaining the quantum dot light diffusing agent after grinding.

[0049] The preparation method of the quantum dot light diffusing agent provided by the embodiment of the present invention is to dissolve the quantum dots together with the additives in the co-solvent, ...

Embodiment 1

[0082] This embodiment provides a preparation method of a quantum dot light diffusing agent, the specific steps are as follows:

[0083] Weigh 1 part of acrylic acid-modified polymethyl methacrylate, add it to an aqueous solution at 70°C, adjust the pH of the aqueous solution to 8, and stir for 1 hour to obtain a polymethyl methacrylate dispersion;

[0084] Weigh 0.001 parts of quantum dots and 0.001 parts of additives into 0.1 parts of co-solvent to obtain mixed solution A, in which 0.0005 parts of antioxidant, 0.0005 parts of light stabilizer, 0 parts of crosslinking agent, and 0 parts of coupling agent share;

[0085] In the polymethyl methacrylate dispersion liquid, add mixed liquid A, the mass ratio of polymethyl methacrylate dispersion liquid and mixed liquid A is 20:1, stir evenly, pass nitrogen 30min, remove the oxygen in the system, then Raise the temperature to 75° C. and stir for 4 hours, then adjust the pH of the mixed solution B to 5.5 for the mixed solution B, s...

Embodiment 2

[0088] The difference between this embodiment and the above-mentioned embodiments is that the preparation method of the quantum dot light diffusing agent provided in this embodiment, the specific steps are as follows:

[0089] Weigh 1 part of acrylic acid-modified polymethyl methacrylate, add it to an aqueous solution at 60° C., adjust the pH of the aqueous solution to 7, and stir for 1 hour to obtain a polymethyl methacrylate dispersion;

[0090] Weigh 0.3 parts of quantum dots and 0.3 parts of additives into 0.15 parts of co-solvent to obtain mixed solution A, wherein 0 parts of antioxidant, 0 parts of light stabilizer, 0.15 parts of crosslinking agent, and 0.15 parts of coupling agent share;

[0091] Add the mixed solution A to the polymethyl methacrylate dispersion, the mass ratio of the polymethyl methacrylate dispersion to the mixed solution A is 2:1, stir evenly, pass nitrogen gas for 30min, remove the oxygen in the system, and then Raise the temperature to 65° C. and ...

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Abstract

The invention provides a quantum dot light diffusing agent and a preparation method thereof. The preparation method includes the steps: performing pretreatment on polymethyl methacrylate to obtain a polymethyl methacrylate dispersion liquid; dissolving quantum dots and an additive in a cosolvent to obtain a mixed solution A; mixing the mixed solution A and the polymethyl methacrylate dispersion liquid to obtain a mixed solution B, adjusting the temperature and pH value of the mixed solution B under the protection of an inert gas, performing full stirring, and performing purification treatmentto obtain a microsphere structure containing the quantum dots; and drying the microsphere structure, and performing grinding to obtain the quantum dot light diffusing agent. According to the method, the polymer material is used to wrap the quantum dots and the additive, so that the stability of the quantum dots during the processing and aging of an optical function board can be improved, and the application range of the quantum dot light diffusing agent can be improved; and the method has a simple preparation process, low equipment costs and high experimental repeatability, and facilitates industrial large-scale production and promotion.

Description

technical field [0001] The invention relates to the technical field of polymer functional materials, in particular to a quantum dot light diffusing agent and a preparation method thereof. Background technique [0002] Optical function boards, also known as light diffusion elements, are widely used in lighting lampshades, screens of rear projection TVs, surface emitting devices (such as liquid crystal display devices), etc. The surface has a prominent effect. [0003] The quantum dot material has the characteristics of wide excitation spectrum, narrow emission spectrum, high color purity, and good photostability, and is a good application solution for improving the optical performance of optical function boards. However, during the application process, quantum dots will be affected by factors such as water, oxygen, and heat at the same time, making quantum dots prone to surface ligand shedding when mixed with PS, PMMA, PC, MS and other polymer materials for high-temperature ...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/88G02B1/00G02B5/02G02B6/00G09F3/00G02B3/00
CPCC09K11/025C09K11/883G02B1/00G02B5/02G02B6/00G09F3/00G02B3/00
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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