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Carbon quantum dot-poly N-isopropylacrylamide composite material and preparation method thereof

A technology of isopropylacrylamide and carbon quantum dots, which can be used in luminescent materials, chemical instruments and methods, pharmaceutical formulations, etc., and can solve the problems of few researches on carbon quantum dots

Inactive Publication Date: 2012-09-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current modification of carbon quantum dots mainly focuses on its combination with inorganic materials, while carbon quantum dots modified with organic materials are rarely studied.

Method used

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  • Carbon quantum dot-poly N-isopropylacrylamide composite material and preparation method thereof
  • Carbon quantum dot-poly N-isopropylacrylamide composite material and preparation method thereof
  • Carbon quantum dot-poly N-isopropylacrylamide composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Add 120ml of glycerol and 4g of polyethyleneimine (PEI, Mw800) into a 250ml round bottom flask, then add 20ml of phosphate solution (pH 7.4) with a concentration of 10mM, and stir vigorously to form a uniform solution. Place the flask containing the clear solution on the rotating platform of a 700W microwave oven and microwave for 10 minutes. After cooling, the obtained brown solution was diluted, and then dialyzed in deionized water with a dialysis bag (molecular weight cut-off 1000), and the water was changed every 8 hours. After dialysis for 3 days, it was freeze-dried to obtain carbon quantum dot nanoparticles (CD, the yield was 51 %).

[0027] Add 50ml of a solution containing 2g of carbon quantum dots and 376g (2.25mmol) of 2-bromoisobutyric acid into a 150ml flask, and adjust the pH to 5.0 with hydrochloric acid. After that, 0.259 g (2.25 mmol) of NHS and 0.431 g (2.25 mmol) of EDC·HCl were added to the mixed solution, and stirred at room temperature for 24 hour...

Embodiment 2

[0030] Add 120ml of glycerol and 4g of polyethyleneimine (PEI, Mw800) into a 250ml round bottom flask, then add 20ml of phosphate solution (pH 7.4) with a concentration of 10mM, and stir vigorously to form a uniform solution. Place the flask containing the clear solution on the rotating platform of a 700W microwave oven and microwave for 10 minutes. After cooling, the obtained brown solution was diluted, and then dialyzed in deionized water with a dialysis bag (molecular weight cut-off 1000), and the water was changed every 8 hours. After 3 days of dialysis, it was freeze-dried to obtain carbon quantum dot nanoparticles (CD, the yield was 51 %).

[0031] Add 50ml of a solution containing 2g of carbon quantum dots and 376g (2.25mmol) of 2-bromoisobutyric acid into a 150ml flask, and adjust the pH to 5.0 with hydrochloric acid. Afterwards, 0.259 g (2.25 mmol) of NHS and 0.431 g (2.25 mmol) of EDC·HCl were added to the mixed solution, and stirred at room temperature for 24 hours...

Embodiment 3

[0034] Add 120ml of glycerol and 4g of polyethyleneimine (PEI, Mw800) into a 250ml round bottom flask, then add 20ml of phosphate solution (pH 7.4) with a concentration of 10mM, and stir vigorously to form a uniform solution. Place the flask containing the clear solution on the rotating platform of a 700W microwave oven and microwave for 10 minutes. After cooling, the obtained brown solution was diluted, and then dialyzed in deionized water with a dialysis bag (molecular weight cut-off 1000), and the water was changed every 8 hours. After 3 days of dialysis, it was freeze-dried to obtain carbon quantum dot nanoparticles (CD, the yield was 51 %).

[0035] Add 50ml of a solution containing 2g of carbon quantum dots and 376g (2.25mmol) of 2-bromoisobutyric acid into a 150ml flask, and adjust the pH to 5.0 with hydrochloric acid. Afterwards, 0.259 g (2.25 mmol) of NHS and 0.431 g (2.25 mmol) of EDC·HCl were added to the mixed solution, and stirred at room temperature for 24 hours...

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Abstract

The invention discloses a carbon quantum dot-poly N-isopropylacrylamide composite material and a preparation method thereof. An N-isopropylacrylamide polymer is grafted to the surface of carbon quantum dots obtained by microwave treatment by adopting an atom transfer radical polymerization (ATPR) method. The preparation method is simple, convenient and mild in conditions. Modified carbon nano particles have fluorescence property and temperature sensitivity.

Description

technical field [0001] The invention relates to a composite material based on carbon quantum dots and a preparation method thereof, more specifically, to a composite material of carbon quantum dots and a temperature-sensitive high polymer and a preparation method thereof. Background technique [0002] As a new type of fluorescent material, carbon quantum dots (CDs) have made great breakthroughs in synthesis and application in recent years. Carbon quantum dots have stable and tunable photoluminescence properties. In addition, compared with traditional metal-semiconductor quantum dot materials, carbon quantum dots have great advantages in terms of biocompatibility. This has laid the foundation for its extensive application prospects in the field of biomedicine. Currently, many advances have been made in the combination of carbon quantum dots and other inorganic materials. For example, carbon quantum dots are attached to the surface of silica nanoparticles as a photosensitiv...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/54A61L31/04A61L31/14A61K47/32C09K11/65
Inventor 刘文广刘璐李文琛
Owner TIANJIN UNIV
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