Silicone resin composite material containing nano-ZnO quantum dots and preparation method and application thereof

A nano-composite material and composite material technology, applied in the field of silicone resin composite material containing nano-ZnO quantum dots and its preparation method and application, can solve the problems of ZnO quantum dot fluorescence performance change, easy agglomeration, growth, fluorescence efficiency reduction, etc. problem, achieve the effect of avoiding light scattering, improving uniformity and prolonging service life

Inactive Publication Date: 2010-02-17
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inorganic semiconductor material ZnO has no obvious absorption in the visible light region, and the fluorescence emission peak of its surface defects is located in the visible light region. The separation and storage of ZnO quantum dots is very easy to agglomerate and grow, which will lead to changes in the fluorescence properties of ZnO quantum dots. Reduced fluorescence efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the ethanol solution of 50ml, add 0.11g zinc acetate, heat to dissolve, obtain the zinc acetate ethanol solution that concentration is 0.01mol / L;

[0032] Add 0.022g of lithium hydroxide to 50ml of ethanol solution, ultrasonically dissolve to obtain a lithium hydroxide ethanol solution with a concentration of 0.01mol / L;

[0033] The above two solutions were evenly mixed, and stirred magnetically at 60° C. for 30 minutes; a colorless and transparent ethanol solution of nano ZnO quantum dots was obtained.

[0034] Add 2 mL of water to the ZnO quantum dot ethanol solution prepared in the above steps, magnetically stir and centrifuge after the solution turns white; pour off the upper layer solution to obtain a white precipitate of nano ZnO quantum dot particles;

[0035] The white precipitate of the obtained nanometer ZnO quantum dot particles was redispersed in 10ml of acetone to obtain a concentration of 0.1mol / L nanometer ZnO quantum dot acetone solution;

[0036] Ta...

Embodiment 2

[0039] Add 1.1 g of zinc acetate to 50 ml of ethanol solution, heat and dissolve, and then reflux at 80°C for 3 hours to obtain a zinc acetate ethanol solution with a concentration of 0.10 mol / L;

[0040] Add 0.73g of lithium hydroxide to 50ml of ethanol solution, ultrasonically dissolve to obtain a lithium hydroxide ethanol solution with a concentration of 0.35mol / L;

[0041] The above two solutions were pre-cooled to 0° C., uniformly mixed in an ice-water bath, and magnetically stirred for 30 minutes; a colorless and transparent ethanol solution of nanometer ZnO quantum dots was obtained.

[0042] Add 1 mL of water to the ethanol solution of nano-ZnO quantum dots prepared in the above steps, magnetically stir and centrifuge after the solution turns white; pour off the upper solution to obtain a white precipitate of nano-ZnO quantum dot particles;

[0043] The white precipitate of the obtained nanometer ZnO quantum dot particles was redispersed in 10mL of acetone to obtain an...

Embodiment 3

[0047] Add 2.2 g of zinc acetate to 50 ml of ethanol solution, heat and dissolve, and then reflux at 80°C for 1 hour to obtain a zinc acetate ethanol solution with a concentration of 0.2 mol / L;

[0048] Add 1.46 g of lithium hydroxide to 50 ml of ethanol solution, and ultrasonically dissolve to obtain a lithium hydroxide ethanol solution with a concentration of 0.70 mol / L. The above two solutions were pre-cooled to 0°C, uniformly mixed in an ice-water bath, and magnetically stirred for 60 minutes. The prepared colorless transparent solution is the nanometer ZnO quantum dot ethanol solution.

[0049] Add 5 mL of water to the nano-ZnO quantum dot ethanol solution prepared in the above steps, magnetically stir and centrifuge after the solution turns white; pour off the upper layer solution to obtain a white precipitate of nano-ZnO quantum dot particles;

[0050] The white precipitate of the obtained nanometer ZnO quantum dot particles was redispersed in 10mL of acetone to obtain...

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Abstract

The invention relates to a silicone resin composite material containing nano-ZnO quantum dots, which is a nanometer composite material consisting of colorless and transparent silicone resin in a visible light area and nano-ZnO quantum dot granules dispersed in the silicone resin evenly. The ratio in weight portion of the silicon resin to the nano-ZnO quantum dot granules is 0.1-10:99.9-90. The preparation method comprises the following steps: firstly preparing the nano-ZnO quantum dot granules, and dispersing the nano-ZnO quantum dot granules into acetone so as to prepare acetone solution of the nano-ZnO quantum dot granules; and secondly, adding corresponding acetone solution of the nano-ZnO quantum dot granules according to the ZnO content in the composite material into the silicone resin, after evenly mixing the mixture, extracting solvent, and injecting the solvent into a mould so as to prepare the silicone resin composite material containing the nano-ZnO quantum dots through curing and forming. The composite material has the excellent light transmittance and luminous performance, and is suitable for the surface encapsulation of photoelectric devices, LED solid lighting devicesor outdoor neon lamps.

Description

technical field [0001] The invention relates to a silicone resin nanocomposite material and its preparation method and application, more specifically, the invention relates to a silicone resin composite material containing nanometer ZnO quantum dots and its preparation method and application. Background technique [0002] Light Emitting Diode (LED) is a high-efficiency solid light source that is expected to replace a large number of practical fluorescent tubes or light bulbs. The traditional whitening technology of LED is to coat the LED chip with phosphor and then encapsulate it with epoxy resin, and the light scattering effect of phosphor will accelerate the aging of the packaging resin material and shorten the service life of the LED. At the same time, the packaging structure Limitations often lead to problems with LED spatial chromaticity non-uniformity. [0003] Quantum Dots (QD) particle size is very small, only a few nanometers, can completely avoid the light scatter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/22C08J3/20C09K11/54H01L33/00H01L31/0203F21V15/02F21Y101/02F21Y115/10H01L33/56
Inventor 付绍云杨洋肖红梅杨娇萍
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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