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Quantum dot with high transparency and high fluorescence efficiency/epoxy resin nano composite material, preparation and applications thereof

A nanocomposite material, epoxy resin technology, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of decreased transparency of nanocomposite materials, weakened fluorescence intensity, and the inability of quantum dots to be directly and effectively dispersed, and achieve excellent transparency. Effects of Sex and Fluorescence Properties

Active Publication Date: 2014-07-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the non-polar carbon chain structure on the surface of the quantum dots, the quantum dots cannot be directly and effectively dispersed in the polar epoxy resin, resulting in a decrease in the transparency and fluorescence intensity of the nanocomposite.

Method used

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  • Quantum dot with high transparency and high fluorescence efficiency/epoxy resin nano composite material, preparation and applications thereof
  • Quantum dot with high transparency and high fluorescence efficiency/epoxy resin nano composite material, preparation and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Preparation of interfacial compatibilizer: add n-butyl methacrylate, ethyl 2-bromopropionate, PMDETA, and CuBr into a three-necked flask in sequence according to the molar ratio of 10:1:1:1, and add toluene (50wt %toluene) at room temperature, mix well, pump vacuum and blow nitrogen, oil bath constant temperature (50 ℃) polymerization reaction, take out after the predetermined time (1.5h), dissolve with tetrahydrofuran, aluminum peroxide column, pour a large amount of precipitant ( Methanol) for precipitation, then filtered, aired, and dried to constant weight to obtain intermediate product 1. Dissolve the intermediate product 1 in toluene as a macroinitiator, then add the second monomer glycidyl methacrylate, add CuBr and PMDETA, and polymerize for 1.5 hours. After the reaction product is dissolved in tetrahydrofuran, first peroxide column, Wash and separate thoroughly with methanol, precipitate and dry in vacuum to obtain poly n-butyl methacrylate-glycidyl methacr...

Embodiment 2

[0026] (1) Preparation of interfacial compatibilizer: According to the molar ratio of 10:1:1:1, n-butyl methacrylate, ethyl 2-bromopropionate, PMDETA, CuBr and 50wt% toluene were added and mixed uniformly at room temperature , add 100ml three-neck flask in turn, pump vacuum and nitrogen gas, polymerize in an oil bath at a constant temperature (50°C), take it out after the predetermined time (4h), dissolve it with tetrahydrofuran, pour aluminum peroxide column into a large amount of precipitant (methanol) Precipitate, then filter, hang in the air, and dry to constant weight to obtain intermediate product 1. Use the intermediate product 1 as a macromolecular initiator, then add the second monomer glycidyl methacrylate, add CuBr and PMDETA, and polymerize for 3 hours. After the reaction product is dissolved in tetrahydrofuran, first peroxide the column, and then thoroughly wash with methanol Separation, precipitation and vacuum drying to obtain poly n-butyl methacrylate-glycidyl ...

Embodiment 3

[0030](1) Preparation of interfacial compatibilizer: According to the molar ratio of 10:1:1:1, n-butyl methacrylate, ethyl 2-bromopropionate, PMDETA, CuBr and 50wt% toluene were added and mixed uniformly at room temperature , add 100ml three-necked flask one by one, evacuate nitrogen, carry out polymerization reaction in oil bath at constant temperature (70°C), take it out after the predetermined time (1.5h), dissolve it with tetrahydrofuran, pour a large amount of precipitant (methanol) into the aluminum peroxide column Precipitate in , then filter, hang in the air, and dry to constant weight to obtain intermediate product 1. Use the intermediate product 1 as a macromolecular initiator, then add the second monomer glycidyl methacrylate, add CuBr and PMDETA, and polymerize for 1.5 hours. After the reaction product is dissolved in tetrahydrofuran, first pass through the aluminum oxide column, and then thoroughly use methanol Washing and separating, precipitation and vacuum dryi...

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Abstract

The invention discloses a quantum dot with high transparency and high fluorescence efficiency / epoxy resin nano composite material, preparation and applications thereof, and belongs to the technical field of nano composite material. Poly(n-butyl methacrylate-glycidyl methacrylate) P(BMA-GMA) amphiphilic two-section copolymer compatibilizer is introduced, the PBMA section of the P(BMA-GMA) copolymer is utilized to soak the oleic acid ligand on the quantum dot surface, the PGMA section of the P(BMA-GMA) is utilized to soak the epoxy substrate, and thus a good interface compatibilizing effect is achieved. The amphiphilic compatibilizing effect of the two-section copolymer is utilized to increase the interface compatibility of quantum dots in epoxy resin substrate, thus the quantum dots are evenly dispersed in the substrate, and the prepared quantum dot / epoxy resin nano composite material has excellent transparency and fluorescence performance, and has a wide application prospect in the field of white light packaging.

Description

technical field [0001] The invention relates to a quantum dot / epoxy resin nanocomposite material with high transparency and high fluorescence efficiency, its preparation and application, especially the use of poly-n-butyl methacrylate-glycidyl methacrylate two-block amphiphilic copolymer to enhance A method for preparing a quantum dot / epoxy resin nanocomposite material with high transparency and high fluorescence efficiency by containing the two-phase interface of the composite material. It has broad application prospects in the field of white light LED packaging, and belongs to the technical field of nanocomposite materials. Background technique [0002] Quantum dots are used as fluorescent materials in the field of LEDs. Their technical advantages lie in their universal strong absorption of light in the near-ultraviolet to blue light region and the characteristics that the wavelength of emitted light is determined by the particle size, which is convenient for matching with...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K9/10C08K5/00C08G59/50C08G59/42C08F293/00C08F220/14C08F220/32H01L33/56
Inventor 邹威陈兰兰张晨杜中杰励杭泉
Owner BEIJING UNIV OF CHEM TECH
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