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Preparation method of high-stability quantum dot film

A technology of quantum dot film and high stability, applied in the field of preparation of high-stability quantum dot film, can solve problems such as insufficient stability of quantum dots, and achieve the effects of increasing PL value decay time, improving stability and reducing thickness

Inactive Publication Date: 2021-02-05
NINGBO DXC NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of insufficient stability of existing quantum dots, the present invention provides a method for preparing quantum dot films with high stability, which can prepare quantum dot films with high stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]A method for preparing a high-stability quantum dot film includes the following steps:

[0023]S1. Provide quantum dots;

[0024]S2. Embedding quantum dots into polystyrene-polyethylene-polybutylene-polystyrene block copolymer (SEBS) particles, which includes the following steps:

[0025](A) Disperse the quantum dots evenly in perchloroethylene, the concentration of the organic solution of the quantum dots is 0.2μmol / ml

[0026](B). Mix SEBS and perchloroethylene with continuous stirring, the concentration of SEBS is 10 mg / ml;

[0027](C). Mix and stir the above two solutions evenly;

[0028](D) Using electrospray technology to spray out the solution in (c) to obtain quantum dots wrapped with polystyrene-polyethylene-polybutylene-polystyrene block copolymer;

[0029]S3. Mixing polystyrene-polyethylene-polybutylene-polystyrene block copolymer particles containing quantum dots with PMMA, wherein the mass percentage of SEBS particles containing quantum dots is 5%.

[0030]S4. The above mixture is made i...

Embodiment 2

[0032]A method for preparing a high-stability quantum dot film includes the following steps:

[0033]S1. Provide quantum dots;

[0034]S2. Embedding quantum dots into polystyrene-polyethylene-polybutylene-polystyrene block copolymer (SEBS) particles, which includes the following steps:

[0035](A) Disperse the quantum dots evenly in methyl chloroform, the concentration of the organic solution of the quantum dots is 0.01μmol / ml

[0036](B). Mix SEBS and methyl chloroform with continuous stirring. The concentration of SEBS is 15 mg / ml;

[0037](C). Mix and stir the above two solutions evenly;

[0038](D) Using electrospray technology to spray out the solution in (c) to obtain quantum dots wrapped with polystyrene-polyethylene-polybutylene-polystyrene block copolymer;

[0039]S3. Mixing polystyrene-polyethylene-polybutylene-polystyrene block copolymer particles containing quantum dots with PS, wherein the mass percentage of SEBS particles containing quantum dots is 0.5%.

[0040]S4. The above mixture is made ...

Embodiment 3

[0042]A method for preparing a high-stability quantum dot film includes the following steps:

[0043]S1. Provide quantum dots;

[0044]S2. Embedding quantum dots into polystyrene-polyethylene-polybutylene-polystyrene block copolymer (SEBS) particles, which includes the following steps:

[0045](A) Disperse the quantum dots evenly in dichloromethane, the concentration of the organic solution of the quantum dots is 0.08μmol / ml

[0046](B). Mix SEBS and dichloromethane with continuous stirring, the concentration of SEBS is 1 mg / ml;

[0047](C). Mix and stir the above two solutions evenly;

[0048](D) Using electrospray technology to spray out the solution in (c) to obtain quantum dots wrapped with polystyrene-polyethylene-polybutylene-polystyrene block copolymer;

[0049]S3. Mixing polystyrene-polyethylene-polybutene-polystyrene block copolymer particles containing quantum dots with PC, wherein the mass percentage of SEBS particles containing quantum dots is 0.2%.

[0050]S4. The above mixture is made into a ...

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PUM

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Abstract

The invention discloses a preparation method of a high-stability quantum dot film. The preparation method comprises the following steps: S1, providing quantum dots; s2, embedding the quantum dots intopolystyrene-polyethylene-polybutylene-polystyrene segmented copolymer particles; s3, mixing the polystyrene-polyethylene-polybutylene-polystyrene segmented copolymer particles containing the quantumdots with an organic polymer plastic material; and S4, preparing the mixture into the quantum dot film. According to the preparation method, the SEBS-coated quantum dots can effectively improve the stability of the quantum dots, and compared with the traditional mode that the quantum dots are directly coated in a polymer plastic material, the SEBS-coated quantum dots enable the PL value decline time of the quantum dots in air and water to be remarkably prolonged, so that the stability of the quantum dot film is greatly improved.

Description

Technical field[0001]The invention relates to a method for preparing a high-stability quantum dot film.Background technique[0002]Quantum dots are a new type of nanomaterials whose size is usually between 1 and 10 nm. They are composed of an inorganic core and organic molecules coated on the surface of the core. At the nanometer scale, quantum dots have special structural characteristics and exhibit some wonderful properties, such as multiple exciton effects, quantum size effects, macroscopic quantum tunneling effects, and surface effects. Compared with the common fluorescent materials in LEDs, quantum dots have the advantages of wide excitation spectrum, narrow emission spectrum, adjustable emission wavelength, high quantum yield, and low photobleaching. They are currently ideal fluorescent materials in the display field and laser field. , Lighting, solar cells, bioluminescent labels, etc. have huge application prospects.[0003]However, the stability of quantum dots is insufficient. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L25/06C08L69/00C08L67/02C08L23/12C08L71/00C08K9/10C08J5/18
CPCC08J5/18C08J2333/12C08J2325/06C08J2369/00C08J2367/02C08J2323/12C08J2371/00C08K9/10
Inventor 罗培栋缪燃王立超魏俊峰
Owner NINGBO DXC NEW MATERIAL TECH
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