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Polymerizable quantum dot and application thereof

A quantum dot, polymer-based technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of reducing the optical properties of quantum dot packages, difficult to increase the concentration of quantum dots, easy to contact with water or oxygen, etc. Optical properties and quantum efficiency, good optical properties, high concentration effect

Active Publication Date: 2016-10-19
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after improving the compatibility between quantum dots and polymer materials, there are still the following problems: ① It is difficult to increase the concentration of quantum dots in the quantum dot package, which reduces the optical performance of the quantum dot package; The combination with the polymer material is through physical effects such as van der Waals force, hydrogen bond, hydrophobic bond, etc. The binding force is not strong enough, which makes the quantum dots not stable enough in the polymer material, and it is easier to come into contact with water or oxygen at high temperature for a long time.

Method used

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  • Polymerizable quantum dot and application thereof
  • Polymerizable quantum dot and application thereof
  • Polymerizable quantum dot and application thereof

Examples

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preparation example Construction

[0067] The present invention also proposes a method for preparing a quantum dot package, comprising the following steps;

[0068] S1: Introduce polymerizable groups on the surface of quantum dots to form quantum dot composites;

[0069] S2: Mix the quantum dot composite with the liquid polymer material precursor, and the polymer material precursor can undergo polymerization reaction after being initiated by the initiator;

[0070] S3: Initiate the polymerization reaction of the precursor of the polymer material by means of light or heating, and solidify into a polymer material. During the polymerization process, part of the precursor of the polymer material and the polymerizable group undergo a copolymerization reaction, so that the quantum dots and the polymer The materials are held together by covalent bonds.

[0071] In the preparation method of the present invention, the polymerizable group on the surface of the quantum dot can undergo a polymerization reaction with the p...

Embodiment 1

[0085] Preparation of quantum dot ligand SH-CO-O-PEG-O-CO-CH=CH2

[0086] Get 50mmol PEG400 and 25mmol dithiodipropionic acid and join in the reaction container, and add 100ml dichloromethane, 30ml diisopropylmethanol and 16.2g 4-dimethylaminopyridine-p-toluenesulfonate, at room temperature Esterification reaction occurred, stirred at room temperature for 24 hours; the resulting product was passed through argon for 30 minutes at 0°C, added 100mol triethylamine for 30 minutes, slowly added 10mmol of acryloyl chloride dropwise under an argon atmosphere at 0°C, and continued to stir for 24 hours; Wash and extract three times with saturated sodium chloride aqueous solution. If the emulsification is severe, separate the two phases by centrifugation. Dry the extracted organic phase with saturated sodium sulfate and remove the solvent by rotary evaporation to obtain a viscous liquid; add 100ml volume ratio to the viscous liquid 4:1 water and ethanol, then add 2g sodium borohydride, s...

Embodiment 2

[0092] The difference from Example 1 is that when preparing the quantum dot package, a chloroform solution of a quantum dot composite containing 50 mg of quantum dots and 500 mg of acrylic UV glue were taken.

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Abstract

Provided is a polymerizable quantum dot. The surface of the quantum dot is modified with ligands, and at least one part of the ligands comprise polymerizable groups which can be subjected to copolymerization with other monomers or prepolymers. According to the polymerizable quantum dot, more quantum dots can be dissolved in a high polymer material, the concentration of the quantum dots in the high polymer material can be increased, a better optical property is achieved, and application of the quantum dots is promoted. The invention further provides a quantum dot dispersoid, a quantum dot packaging body, a backlight module, a lighting device and a preparation method of the quantum dot packaging body.

Description

technical field [0001] The present invention relates to a polymerizable quantum dot. [0002] The invention also relates to a quantum dot dispersion, a quantum dot package and a preparation method thereof. [0003] The invention also designs a backlight module and a lighting device prepared by the quantum dot package. Background technique [0004] Quantum dots, also known as nanocrystals, are materials with a size of several nanometers, usually in the range of 1-20 nanometers, and a crystalline structure. Quantum dots can fluoresce when excited by an appropriate light source or voltage. Quantum dots have been extensively studied in the past two decades due to their special properties, such as size-tunable optical properties, high quantum efficiency, relatively narrow half-width, and resistance to photodegradation. As a new generation of luminescent materials, quantum dots are gradually emerging in LED display applications. The quantum dot material can effectively improve...

Claims

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Application Information

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IPC IPC(8): C09K11/02C08F290/14
CPCC08F290/142C09K11/025
Inventor 王允军席玉坤方龙魏登科
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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