Method for preparing polymer fluorescent nano particle

A fluorescent nanometer and polymer technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of complex preparation process and application limitations, and achieve the effect of simple preparation method

Inactive Publication Date: 2011-05-18
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose a new method for preparing polymer fluorescent particles, in order to solve the problems that the current preparation process of polymer fluorescent parti

Method used

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  • Method for preparing polymer fluorescent nano particle
  • Method for preparing polymer fluorescent nano particle
  • Method for preparing polymer fluorescent nano particle

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specific Embodiment approach 1

[0012] Specific embodiment one: a kind of preparation method of polymer fluorescent nanoparticle is to carry out according to the following steps: one, in the there-necked bottle of 500ml, add the selenium powder of 1.975g, the deionized water of 3.78g anhydrous sodium sulfite and 250ml, Under nitrogen condition, heat to 100 ℃~110 ℃ with oil bath, reflux 2~4 hours, after stopping heating, under the condition of flowing nitrogen, cool to room temperature, obtain colorless and transparent sodium selenosulfate solution; 2. Sodium hydroxide solution with a mass percent concentration of 6% to 8% and a mass percent concentration of cadmium acetate dihydrate solution with a mass percent concentration of 2% to 3% are sequentially added to a conical flask mixed with absolute ethanol and oleic acid, and the mixed liquid evolves It is white, then add the colorless and transparent sodium selenosulfate solution prepared in step 1 into the Erlenmeyer flask, then transfer it to a Teflon-lined...

specific Embodiment approach 2

[0017] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in the step one, add the selenium powder of 1.975g, 3.78g anhydrous sodium sulfite and the deionized water of 250ml in the there-necked bottle of 500ml, under the nitrogen condition , start heating with an oil bath to 102°C to 108°C, stop heating after 2.5 to 3.5 hours of reflux, and cool to room temperature under the condition of blowing nitrogen to obtain a colorless and transparent sodium selenosulfate solution. Other steps and parameters are related to the specific Embodiment 1 is the same.

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that, in step one, add the selenium powder of 1.975g, 3.78g anhydrous sodium sulfite and the deionized water of 250ml in the there-necked bottle of 500ml, in logical nitrogen Under the conditions, start heating to 105° C. with an oil bath, stop heating after reflux for 3 hours, and cool to room temperature under nitrogen gas conditions to obtain a colorless and transparent sodium selenosulfate solution. Other steps and parameters are the same as those in the specific embodiment or two the same.

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Abstract

The invention relates to a method for preparing a polymer fluorescent nano particle, which belongs to the field of materials. The invention solves the problems that the traditional polymer fluorescent particle preparation process is complicated and the traditional polymer fluorescent sphere is micron or submicron grade in size and limited in application. The method comprises the following steps of: 1. refluxing by heating for preparing a seleno-sodium sulfate solution; 2. after mixing a seleno-sodium sulfate solution, a cadmium acetate solution, a sodium hydroxide solution, oleic acid and ethanol according to a certain proportion, carrying out heat reaction for preparing a cadmium selenide quantum dot; 3. extracting the quantum dot through styrene and preparing styrene even suspension; 4. carrying out emulsifying polymerization on the styrene suspension and reacting for preparing polystyrene nano fluorescent particle emulsion; and 5. adding salt into the styrene nano fluorescent particle emulsion, centrifuging, dispersing and storing to obtain the polystyrene fluorescent nano particle. The prepared polystyrene fluorescent nano particle can be applied to the fields of biomarkers, optical materials, cell imaging, and the like.

Description

[0001] Technical field: the present invention relates to a preparation method of polymer fluorescent nanoparticles. Background technique [0002] Quantum dots (QDs) are also known as nanocrystals. Many modern luminescent materials and optical devices are composed of semiconductor quantum structures. The size of the quantum dots formed by the materials is close to the size of the dye molecules commonly used in the past, so it is as harmful to biology as fluorescent dyes. Medical research has great uses. From the perspective of the difference of luminescent markers in biological systems, quantum dots have a significant size effect due to the wonderful rules of quantum mechanics. Basically, light above a certain threshold can be absorbed, and quantum dots must absorb all energy photons, but the emitted light wavelength is very size-dependent, so a single type of nano-semiconductor material can produce a family of markers with different light-emitting wavelengths and distinct colo...

Claims

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Application Information

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IPC IPC(8): C08F112/08C08F2/44C08F2/24C08K3/30C09K11/88
Inventor 孙立国刘玉辉汪成史振朋
Owner HEILONGJIANG UNIV
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