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PH responsive fluorescent carbon nanoparticle hybrid microgel and preparation method thereof

A carbon nanoparticle and microgel technology, which is applied in the chemical industry, can solve problems that limit the practical application of hydrogels, and achieve good pH responsiveness

Active Publication Date: 2015-03-04
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing responsive microgels usually only respond to volume, that is, when the environment changes, usually only its volume responds to environmental changes, which greatly limits the practical application of hydrogels.

Method used

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  • PH responsive fluorescent carbon nanoparticle hybrid microgel and preparation method thereof
  • PH responsive fluorescent carbon nanoparticle hybrid microgel and preparation method thereof
  • PH responsive fluorescent carbon nanoparticle hybrid microgel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh an appropriate amount of fluorescent carbon nanoparticles 100 mg, dissolve in dichloromethane, prepare a fluorescent carbon particle solution with a concentration of 0.5-10 mg / mL, add 4 mg of acryloyl chloride, react at room temperature for 10 h, remove the reaction solvent, add water, spin After drying, double-bonded fluorescent carbon nanoparticles are obtained.

[0026] Weigh 40 mg of double-bonded fluorescent carbon particles, add 20 mL of distilled water, and transfer it to a three-neck flask equipped with a stirrer, a reflux condenser, and a thermometer. Turn on the stirrer and evenly ventilate nitrogen to completely exhaust the air in the container and the solution. Add 5 mg of cross-linking agent N-N methylenebisacrylamide, 5 mg of sodium dodecylsulfonate (SDS) and 600 mg of refined acrylic acid. Continue nitrogen sparging to completely vent the container and solution of air. Heating, after the reaction solution starts to reflux, weigh 5 mg of potassium ...

Embodiment 2

[0028] Weigh an appropriate amount of 100 mg of fluorescent carbon nanoparticles, dissolve them in dichloromethane, and prepare a fluorescent carbon particle solution with a concentration of 0.5-10 mg / mL. Add 4 mg of acryloyl chloride. After reacting at room temperature for 10 h, the reaction solvent was removed, water was added, and double-bonded fluorescent carbon nanoparticles were obtained after spin-drying.

[0029] Weigh 35 mg of double-bonded fluorescent carbon particles, add 100 mL of distilled water, and transfer it to a three-necked flask equipped with a stirrer, a reflux condenser, and a thermometer. Turn on the stirrer and evenly ventilate nitrogen to completely exhaust the air in the container and the solution. Add 8 mg of cross-linking agent N-N methylenebisacrylamide, 10 mg of sodium dodecylsulfonate (SDS) and 550 mg of refined acrylic acid. Continue nitrogen sparging to completely vent the container and solution of air. Heating, after the reaction solution s...

Embodiment 3

[0031] Weigh an appropriate amount of 100 mg of fluorescent carbon nanoparticles, dissolve them in dichloromethane, and prepare a fluorescent carbon particle solution with a concentration of 0.5-10 mg / mL. Add 5 mg of acryloyl chloride. After reacting at room temperature for 10 h, the reaction solvent was removed, water was added, and double-bonded fluorescent carbon nanoparticles were obtained after spin-drying.

[0032] Weigh 30 mg of double-bonded fluorescent carbon particles, add 100 mL of distilled water, and transfer it to a three-necked flask equipped with a stirrer, a reflux condenser, and a thermometer. Turn on the stirrer and evenly ventilate nitrogen to completely exhaust the air in the container and the solution. Add 10 mg cross-linking agent N-N methylenebisacrylamide, 10 mg sodium dodecylsulfonate (SDS) and 600 mg refined acrylic acid. Continue nitrogen sparging to completely vent the container and solution of air. Heating, after the reaction solution starts to...

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PUM

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Abstract

The invention relates to a pH (Potential of Hydrogen) responsive fluorescent carbon nanoparticle hybrid microgel and a preparation method thereof. The preparation method comprises the following steps: (1) weighing fluorescent carbon nanoparticles, using methylene dichloride to dissolve and prepare a fluorescent carbon nanoparticle solution, adding acyl chloride monomers, reacting for 10 h under room temperature, removing a reaction solvent, adding water, and drying through rotation; (2) weighing to obtain double-bonded fluorescent carbon nanoparticles, adding the double-bonded fluorescent carbon nanoparticles into distilled water, transferring the liquid into a reaction container, adding a cross-linking agent, sodium dodecyl sulfate and pH responsive polymer monomers after exhausting air, introducing nitrogen gas to exhaust the air, heating, and adding an initiating agent into a three-opening bottle after reaction liquid begins to backflow; (3) continuously introducing nitrogen gas and stirring, and carrying out a backflow reaction for 5-20 h at 50-90 DEG C; (4) filtering after cooling to room temperature, taking filter liquor, and placing the filter liquor in a dialysis bag for dialyzing for 48 h. The obtained product is free of biological toxicity, the grain diameter of the product is about 760 nm, fluorescent light has good pH responsiveness under the excitation of the same wavelength, and the product has a good application in the fields of drug release, pH sensing and catalysis.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a pH-responsive fluorescent carbon nanoparticle hybrid microgel and a preparation method thereof. technical background [0002] Microgel is a highly cross-linked polymer colloid particle in the molecule, and its internal structure is a typical three-dimensional network structure. Microgel (hydrogel) is a hydrophilic gel that can store a large amount of water and swell significantly. Because the structure generally contains hydrophilic groups, such as -CONH 2 , -COOH, -SO 3 H et al. These microgels usually have environmental (such as pH, temperature) stimuli-responsive properties, and their volume will grow or shrink with changes in the environment (such as pH, temperature). Due to the characteristics of strong surface adsorption, large specific surface area, functional diversity, controllable gel particle size, and designable structural composition, microgels are wid...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/06C08F220/56C08F222/38C09K11/06
Inventor 廖博王武邓晓婷刘清泉
Owner HUNAN UNIV OF SCI & TECH
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