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Quantum-dot strengthened composite light conversion film and preparation method thereof

A technology of quantum dots and composite light, which is applied in the field of quantum dot enhanced composite light conversion film and its preparation, which can solve the problems of poor transparency of polymer matrix, low doping content of quantum dots, poor dispersion, etc., and achieve high transparency and stability , High doping content, high transparency effect

Inactive Publication Date: 2014-09-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to propose a quantum dot enhanced composite light conversion film and its preparation method, aiming at the problems of low quantum dot doping content, poor dispersion and poor transparency of the polymer matrix in the existing quantum dot / polymer composite material preparation technology Problem, one of the objectives of the present invention is to provide a composite light conversion film with transparency, luminous intensity and adjustable color

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  • Quantum-dot strengthened composite light conversion film and preparation method thereof
  • Quantum-dot strengthened composite light conversion film and preparation method thereof
  • Quantum-dot strengthened composite light conversion film and preparation method thereof

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preparation example Construction

[0028] The preparation method of the quantum dot enhanced composite light conversion film proposed by the present invention comprises the following steps:

[0029](1) Add 0.016 g of 2,2,6,6-tetramethylpiperidine-nitrogen-oxide and 0.1 g of NaBr to 100 g of deionized water to obtain an aqueous solution, then add 1 g of cellulose to the aqueous solution to form a suspension , add 10 micromole NaClO solution (6% active chlorine, concentration is 1.6 mol / liter) in the suspension, stir vigorously at room temperature for 12 hours, will obtain suspension and pour 150 grams of deionized water, under 400 watts power Ultrasonic treatment for 4 minutes to obtain a homogeneous suspension, which was centrifuged at a speed of 8000 rpm and a centrifugation time of 20 minutes, the obtained supernatant was a nanocellulose dilute suspension, dilute suspension The mass fraction of nanocellulose in the liquid is 0.05-0.1wt%, the diameter of nanocellulose is nanoscale, the length of nanocellulose ...

Embodiment 1

[0035] Step 1: Add 0.016 gram of 2,2,6,6-tetramethylpiperidine-nitrogen-oxide and 0.1 gram of NaBr to 100 gram of deionized water, then add 1 gram of cellulose to the aqueous solution to form a uniform suspension, and add Add 10 micromoles of NaClO solution (6% active chlorine, 1.6 mol / liter) to the suspension, stir vigorously at room temperature for 12 hours, pour the obtained suspension into 150 grams of deionized water, and sonicate for 4 minutes at a power of 400 watts , to obtain a homogeneous suspension, the homogeneous suspension is centrifuged, the centrifugation speed is 8000 rpm, and the centrifugation time is 20 minutes, the obtained supernatant is a nanocellulose dilute suspension, and the nanofibers in the dilute suspension The mass fraction of element is 0.05wt%;

[0036] Step 2, rotating the dilute suspension of nanocellulose at 80° C. for 4 hours, and distilling off the solvent water to obtain a concentrated suspension of nanocellulose with a mass fraction of 0...

Embodiment 2

[0042] Step 1: Add 0.016 gram of 2,2,6,6-tetramethylpiperidine-nitrogen-oxide and 0.1 gram of NaBr to 100 gram of deionized water, then add 1 gram of cellulose to the aqueous solution to form a uniform suspension, and add Add 10 micromoles of NaClO solution (6% active chlorine, 1.6 mol / liter) to the suspension, stir vigorously at room temperature for 12 hours, pour the obtained suspension into 150 grams of deionized water, and sonicate for 4 minutes at a power of 400 watts , to obtain a homogeneous suspension, the homogeneous suspension is centrifuged, the centrifugation speed is 8000 rpm, and the centrifugation time is 20 minutes, the obtained supernatant is a nanocellulose dilute suspension, and the nanofibers in the dilute suspension The mass fraction of element is 0.05wt%;

[0043] Step 2, rotating the dilute suspension of nanocellulose at 80° C. for 4 hours, and distilling off the solvent water to obtain a concentrated suspension of nanocellulose with a mass fraction of 0...

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Abstract

The invention relates to a quantum-dot strengthened composite light conversion film and a preparation method thereof, belonging to the field of photoelectric-function high-polymer technical materials. The film material with adjustable flexibility, transparency, luminescent intensity and color is composed of nano cellulose, a plasticizer and water-soluble quantum dots, wherein polyalcohol is used as the plasticizer of the nano cellulose for regulating the flexibility of the film, and the water-soluble quantum dots can account for 0.1-50 wt% of the composite material; and the film has adjustable transparency, flexibility and luminescent color, controllable thickness and cuttable area. The thickness and area of the film material can be scaled up according to application demands. The quantum-dot strengthened composite light conversion film prepared by the method has the advantages of high composite material doping amount, high transparency and high flexibility, and is cuttable and flexible; the luminescent color and luminescent intensity can be adjusted according to the type, size and proportioning of the quantum dots; and the addition of the glycerol can further optimize the flexibility of the film material.

Description

technical field [0001] The invention relates to a quantum dot enhanced composite light conversion film and a preparation method thereof, belonging to the field of photoelectric functional polymer technology materials. Background technique [0002] Quantum dots (QDs) are quasi-zero-dimensional inorganic semiconductor materials with a size ranging from a few nanometers to tens of nanometers. Due to the quantum size effect and dielectric confinement effect, they show unique optical properties such as tunable emission spectra, making quantum dots It has broad application prospects in optoelectronics and biology. Quantum dot materials are small in size and have significant surface effects. They usually exist in the state of colloidal solution or solid powder, and their stability and dispersion are poor, and they are easy to agglomerate. Therefore, it needs to be compounded with an appropriate inert medium to prevent its aggregation and adhesion. Due to the advantages of optical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K13/02C08K3/10C08K3/30C08K5/053C08J3/03C08J5/18
Inventor 钟海政朱敏彭晓青吕妍妍邵自强
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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