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Novel barrier-free quantum dot film and preparation method thereof

A quantum dot film and quantum dot technology, which are applied in the field of new unblocked quantum dot film and its preparation, can solve the problem of high cost of quantum dot film, and achieve the effect of realizing precise control and satisfying optical requirements.

Pending Publication Date: 2021-11-09
NANJING BREADY ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a new type of non-barrier quantum dot film and its preparation method. By improving the preparation method of the quantum dot film, the water and oxygen barrier performance of the quantum dot is improved, and the traditional high-cost barrier layer is no longer used, which greatly reduces the The production cost of quantum dot film solves the technical problem that the cost of quantum dot film remains high in the prior art

Method used

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  • Novel barrier-free quantum dot film and preparation method thereof
  • Novel barrier-free quantum dot film and preparation method thereof
  • Novel barrier-free quantum dot film and preparation method thereof

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preparation example Construction

[0052] For the first preparation method, it includes the following steps: uniformly mixing the matrix 302 heated to a molten state with the quantum dots, forming and granulating to obtain quantum dot matrix particles; pulverizing the quantum dot matrix particles to obtain the first micron-sized quantum dot matrix microspheres Spray the coating solution in mist form evenly on the surface of the first quantum dot matrix microsphere, vacuum dry after fully stirring, and obtain the first quantum dot matrix microsphere of the surface coating coating 303, which is denoted as the second quantum dot matrix microsphere ball; the coating solution is SiO 2 , SiO x N y , Si, azotriazolone, AlO x , silane, silicon nitride, silicon oxynitride, polyvinylidene chloride, ethylene, vinyl alcohol copolymer, polyamide, acrylic resin, polyurethane resin, polyimide and one or more organic solvents, polyurethane resin, Acrylic resins are uniformly mixed in proportion to obtain a mixed solution wi...

Embodiment 1

[0061] (1) preparation of quantum dot PMMA microspheres

[0062] Heat the PMMA particles to 200°C to melt, add 10wt% green quantum dot powder to the above-mentioned molten PMMA and mix well, then melt extrusion and granulate; put the formed PMMA quantum dot particles into a planetary ball mill for Pulverize to obtain green quantum dot PMMA microspheres with a particle size of about 5 μm; repeat the above operation to obtain red quantum dot PMMA microspheres with a particle size of about 5 μm.

[0063] (2) Preparation of non-barrier quantum dot film

[0064] The above-mentioned green and red quantum dot matrix microspheres are fully mixed with resin glue and 1.0wt% scattering particles according to the ratio of 4.5wt% and 2.0wt%, and then coated between the two substrate layers 101, and using a high-pressure curing process. The curing of the resin glue 203 completes the preparation of the non-barrier quantum dot film.

[0065] (3) Performance characterization of non-barrier q...

Embodiment 2

[0068] (1) Preparation of quantum dot PMMA microspheres

[0069] The PMMA particles are heated to 200° C. to melt, and 10 wt % green quantum dot powder is added to the above-mentioned molten PMMA for thorough mixing, followed by melt extrusion molding and granulation. The shaped PMMA quantum dot particles were put into a planetary ball mill for crushing to obtain green quantum dot PMMA microspheres with a particle size of about 5 μm. The above operations were repeated to obtain red quantum dot PMMA microspheres with a particle size of about 5 μm.

[0070] (2) Treating the surface of quantum dot microspheres

[0071] 10g nano-SiO 2 Disperse the powder (50-100nm in particle size) into 100g of isopropanol, stir well, add 5g of polyurethane resin and 2.5g of phthalate coupling agent for ultrasonic treatment, and obtain a surface treatment solution.

[0072] Sprinkle the above solution on the quantum dot microspheres in the form of a spray through a nozzle, while stirring the qu...

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Abstract

The invention provides a novel barrier-free quantum dot film and a preparation method thereof, and relates to the technical field of optical films. According to the preparation method, quantum dots and matrix particles are subjected to melt extrusion molding granulation and crushing to form quantum dot matrix microspheres, and then the surfaces of the quantum dot matrix microspheres are coated with a water-blocking and oxygen-isolating coating, so that the stability of the quantum dots is improved; or quantum dots and oil-soluble monomers are subjected to a polymerization reaction to generate quantum dot polymer microspheres, and the quantum dots are wrapped in the polymer microspheres, so that the quantum dots are isolated from water and oxygen, and the stability of the quantum dots is improved; and the quantum dot matrix microspheres or the quantum dot polymer microspheres and scattering particles are dispersed in a resin glue in proportion, and a barrier-free quantum dot film is obtained after the resin glue is cured. According to the invention, the water-blocking and oxygen-isolating performance of the quantum dots is improved, a traditional blocking layer does not need to be used, and the production cost of the quantum dot film is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of optical films, in particular to a novel barrier-free quantum dot film and a preparation method thereof. Background technique [0002] At present, the most extensive and profound application field of quantum dots is in the optical field, forming quantum dot displays, and gradually being favored by terminal displays. The process of forming a quantum dot display is to mix quantum dots with heat-curable or light-curable glue to form a quantum dot film and then apply it to a liquid crystal display (LCD), which can increase the NTSC color gamut of the LCD display to 120. % or more, while the NTSC color gamut of current LCD displays can only achieve about 72%, quantum dot display TVs have better color expression and fidelity. [0003] At present, the more common production method of quantum dot film is to mix quantum dots with heat-curing or light-curing glue, and combine them with two layers of barrier films t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/00
CPCB32B27/32B32B27/304B32B27/365B32B27/36B32B27/308B32B27/302B32B27/08B32B33/00C09K11/025C09K11/883B82Y20/00B82Y30/00C09J133/04C09J11/04C09J11/08B29D7/01B29B9/16B29B9/02B29B13/10C08K2003/2241C08K2201/014C08L2205/18B32B2255/28B32B2255/10B32B2255/26C08L33/12C08K3/30C08K3/22
Inventor 谢彬彬刘勇张军舒欣
Owner NANJING BREADY ELECTRONICS CO LTD
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