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A kind of preparation method of fluorescent carbon quantum dot polymer hybrid material

A technology of carbon quantum dots and hybrid materials, which is applied in the field of preparation of fluorescent carbon quantum dot polymer hybrid materials, can solve problems such as complex operation process, achieve uniform size distribution, excellent fluorescence performance, and a wide range of sources

Active Publication Date: 2018-09-21
南京贝耳时代科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, carbon quantum dots are rarely reported in the field of fingerprint display: 1Fernandes, D.; Krysmann, M.J.; Kelarakis, A. Carbon Dot Based Nanopowders and Their Application for Fingerprint Recovery.Chem.Commun.2015,51:4902~4905. The process is relatively complicated
Therefore, how to extract high-quality fingerprints using simple and effective methods is still a challenge

Method used

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  • A kind of preparation method of fluorescent carbon quantum dot polymer hybrid material
  • A kind of preparation method of fluorescent carbon quantum dot polymer hybrid material
  • A kind of preparation method of fluorescent carbon quantum dot polymer hybrid material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1 Preparation of carbon quantum dots

[0035] Take 5g of cleaned and dried pig small intestine and place it in a porcelain boat, then place the porcelain boat in a tubular quartz tube, pass nitrogen protection into the tube furnace, and raise the temperature to 250°C with a heating rate of 6°C / min , the processing time is 3h. After the reaction is finished, grind the obtained black solid into powder, take 1g of the solid and disperse it in 10mL aqueous solution, and use an ultrasonic cleaner with a power of 100w and a frequency of 40kHz for 60min to obtain a uniformly dispersed suspension. The solution was centrifuged at 12,000 rpm for 15 minutes to remove the black solid precipitate to obtain a clear liquid; the clear liquid was filtered with a 0.2 μm PES filter membrane to further remove insoluble impurities to obtain a filtrate. Measured by the fluorescence spectrometer, the main peak is at about 450nm, which is a typical blue fluorescence, and the ultraviolet absor...

Embodiment 2

[0039]Take 5g of cleaned and dried pig small intestine and place it in a porcelain boat, then place the porcelain boat in a tubular quartz tube, pass nitrogen protection into the tube furnace, and raise the temperature to 300°C with a heating rate of 5°C / min , the processing time is 2h. After the reaction was finished, the obtained black solid was ground into powder, and 2 g of the solid was dispersed in 10 mL of ethanol solution, and treated with an ultrasonic cleaner with a power of 200 w and a frequency of 40 kHz for 30 min to obtain a uniformly dispersed suspension. The turbid liquid was centrifuged at a centrifugal speed of 9000 rpm for 20 minutes to remove the black solid precipitate to obtain a clear liquid; the clear liquid was filtered with a 0.2 μm PES filter membrane to further remove insoluble impurities to obtain a filtrate. The main peak is measured by the fluorescence spectrometer at about 460nm, which is a typical blue fluorescence, and the ultraviolet absorpti...

Embodiment 3

[0043] 1 Preparation of carbon quantum dots

[0044] Take 5g of cleaned and dried pig small intestine and place it in a porcelain boat, then place the porcelain boat in a tubular quartz tube, pass nitrogen protection into the tube furnace, and raise the temperature to 350°C with a heating rate of 5°C / min , the processing time is 2h. After the reaction was finished, the obtained black solid was ground into a powder, 5 g of the solid was dispersed in 10 mL of DMF solution, and the power was 200 w, and the frequency was 40 kHz with an ultrasonic cleaner for 45 min to obtain a uniformly dispersed suspension. The solution was centrifuged at a centrifugal speed of 13,000 rpm for 10 minutes to remove the black solid precipitate to obtain a clear liquid; the clear liquid was filtered with a 0.45 μm nylon 66 filter membrane to further remove insoluble impurities to obtain a filtrate. The main peak is measured by the fluorescence spectrometer at about 440nm, which is a typical blue flu...

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Abstract

The invention relates to a preparation method of a fluorescent carbon quantum dot polymer hybrid material, wherein the preparation method comprises the following specific steps: collecting pig small intestines, washing cleanly, and then air-drying; carrying out high-temperature heat treatment of the cleanly treated pig small intestines to obtain a black solid; grinding the black solid into a powder, then dispersing the powder in a solvent, and carrying out ultrasonic treatment to obtain an evenly dispersed suspension; carrying out centrifugal treatment of the suspension, and removing black solid precipitate, to obtain a clear liquid; filtering the clear liquid with a filter membrane, to obtain a filtrate, drying the filtrate, to obtain a fluorescent carbon quantum dot powder; and placing the fluorescent carbon quantum dot powder, a polymer and a solvent in a container, then placing the container in an oil bath pot, stirring at constant temperature, and thus obtaining the polymer hybrid material. The raw materials are rich in proteins, green and non-toxic; the preparation process is simple, and the polymer hybrid material has excellent fluorescence properties, and has the absolute quantum yield of more than 8%; and the prepared hybrid material is successfully applied in extraction and identification of fingerprints.

Description

technical field [0001] The invention relates to a preparation method of a fluorescent carbon quantum dot polymer hybrid material, in particular to a preparation method of a fluorescent carbon quantum dot extracted from pig small intestine and a polymer hybrid material thereof and the fingerprint identification application. Background technique [0002] Carbon quantum dots are a new type of luminescent nano-carbon materials. Fluorescent carbon quantum dots have high water solubility, good biocompatibility and environmental friendliness. Therefore, in recent years, it has received extensive attention in biomarkers, bioimaging and sensors, and its advantages are low cost, good photostability, and easy large-scale preparation. Compared with traditional semiconductor quantum dots, carbon quantum dots do not contain any heavy metal elements, so they have great application prospects in the biological field. In addition, carbon quantum dots also have good photostability, chemical i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65C08J5/18C08L29/04C08L39/06C08L25/06C08L33/12C08K3/04B82Y40/00
CPCB82Y40/00C08J5/18C08J2325/06C08J2329/04C08J2333/12C08J2339/06C08K3/04C08L2203/16C09K11/65C08L29/04C08L39/06C08L25/06C08L33/12
Inventor 陈苏吉文卿谭鹏峰王彩凤
Owner 南京贝耳时代科技有限公司
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