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Monodisperse carboxy-modified quantum dot composite microspheres, preparation method and application thereof

A carboxyl-modified and composite microsphere technology, which is applied in the direction of analytical materials, measuring devices, instruments, etc., can solve the problems of wide particle size distribution, unstable chemical properties, and limited application range, so as to reduce loss and simplify operation , the effect of easy operation

Active Publication Date: 2019-12-17
成都爱兴生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Based on the above related backgrounds, the preparation methods of polymer quantum dot composite microspheres in this field generally have uneven distribution of quantum dots in the prepared polymer quantum dot composite microspheres, unstable chemical properties, wide particle size distribution, and uneven distribution of quantum dots. It has the disadvantages of monodispersity and limited scope of application

Method used

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  • Monodisperse carboxy-modified quantum dot composite microspheres, preparation method and application thereof
  • Monodisperse carboxy-modified quantum dot composite microspheres, preparation method and application thereof
  • Monodisperse carboxy-modified quantum dot composite microspheres, preparation method and application thereof

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Embodiment 1

[0045] This embodiment provides a one-step method for preparing monodisperse polystyrene quantum dot composite microspheres containing carboxyl groups on the surface. The specific steps are as follows:

[0046] Oil-soluble quantum dot nanoparticles are dissolved in n-octane to form a quantum dot solution with a mass fraction of 10%. Weighing 20mg sodium dodecylsulfonate is dissolved in 40g distilled water to obtain sodium dodecylsulfonate aqueous solution, and then 2g of the quantum dot solution was added to the aqueous solution of sodium dodecylsulfonate for mixing, and the mixed solution was treated with a homogenizer at low temperature to obtain a quantum dot miniemulsion.

[0047] Weigh 80mg of sodium dodecylsulfonate and dissolve in 80g of distilled water to obtain an aqueous solution of sodium dodecylsulfonate, then mix 3.2g of styrene monomer with 40mg of superhydrophobic agent hexadecane, and pack it into the monomer tank. Nitrogen protection was applied, and pressure ...

Embodiment 2

[0050] This embodiment provides a one-step method for preparing monodisperse polystyrene quantum dot composite microspheres containing carboxyl groups on the surface. The specific steps are as follows:

[0051] Oil-soluble quantum dot nanoparticles are dissolved in n-octane to form a quantum dot solution with a mass fraction of 50%. Weighing 20mg sodium dodecylsulfonate is dissolved in 100g distilled water to obtain sodium dodecylsulfonate aqueous solution, and then 1 g of the quantum dot solution was added to the aqueous solution of sodium dodecylsulfonate for mixing, and the mixed solution was treated with a homogenizer at low temperature to obtain a quantum dot miniemulsion.

[0052] Weigh 80mg of sodium dodecylsulfonate and dissolve in 120g of distilled water to obtain an aqueous solution of sodium dodecylsulfonate, then mix 12g of styrene monomer with 120mg of superhydrophobic agent hexadecane, put it into a monomer tank, and pass Under nitrogen protection, pressure is ap...

Embodiment 3

[0055] This embodiment provides a one-step method for preparing monodisperse polystyrene quantum dot composite microspheres containing carboxyl groups on the surface. The specific steps are as follows:

[0056] Oil-soluble quantum dot nanoparticles are dissolved in n-octane to form a quantum dot solution with a mass fraction of 20%, and weighing 20 mg of sodium dodecylsulfonate is dissolved in 50 g of distilled water to obtain sodium dodecylsulfonate. aqueous solution, and then 1 g of the quantum dot solution was added to the aqueous solution of sodium dodecylsulfonate for mixing, and the mixed solution was treated with a homogenizer at low temperature to obtain a quantum dot miniemulsion.

[0057] Weigh 80mg of sodium dodecylsulfonate and dissolve in 100g of distilled water to obtain an aqueous solution of sodium dodecylsulfonate, then mix 5g of styrene monomer with 80mg of superhydrophobic agent hexadecane, put it into the monomer tank, and pass Under nitrogen protection, pr...

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Abstract

The invention relates to monodisperse carboxyl modified quantum dot composite microspheres as well as a preparation method and application thereof. The preparation method comprises the following stepsof: firstly, preparing a quantum dot fine emulsion by adopting a homogenizer treatment method; secondly, preparing a monomer emulsion; and finally, preparing the monodisperse carboxyl modified quantum dot composite nano microspheres by adopting a hybrid emulsion polymerization method. By use of the preparation method, further functional modification on surfaces of polystyrene microspheres is notneeded, and nano-scale monodisperse carboxyl modified polystyrene quantum dot composite microspheres can be directly prepared, so that the operation is further greatly simplified, and the loss is reduced. The preparation method is simple and convenient to operate, is suitable for industrial popularization and use, and most importantly, can prepare and obtain monodisperse quantum dot composite microspheres with highly uniform particle diameter and modified by carboxyl groups, thus completing basic preparation works for the application of the quantum dot composite microspheres in the fields of chemiluminescence immunity and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer functional materials, and in particular relates to a monodisperse carboxyl-modified quantum dot composite microsphere, its preparation method and application. Background technique [0002] Due to their unique photoelectric properties, quantum dots have been greatly developed and widely used in recent years. Compared with traditional organic fluorescent dye molecules, it has the following advantages: [0003] 1. The emission peak is narrow and symmetrical, without the typical red-shift tailing of fluorescent dyes, and has a strong fluorescent signal at the characteristic wavelength; [0004] 2. The same excitation light can be used and different quantum dots can be selected to obtain different emission wavelengths and multiple detections can be performed, which can be used as the basis for multiple detections in immunofluorescence chromatography; [0005] 3. The quantum efficiency of fluorescence...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F222/02C08F220/06C08F2/44C08F2/26G01N33/533
CPCC08F2/26C08F2/44C08F212/08G01N33/533C08F222/02C08F220/06
Inventor 程敏卓
Owner 成都爱兴生物科技有限公司
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