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Method for preparing aminated carbon nano tube

A carbon nanotube and carbon amination technology, which is applied in the intersection of chemical and biological materials, can solve the problems of cumbersome steps, complicated operation and danger, and achieve the effect of simple and easy control and mild reaction conditions.

Inactive Publication Date: 2012-05-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the amination of carbon nanotubes is mainly based on the acid chloride method, which has cumbersome steps, complicated operations and certain risks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 1 g of multi-walled carbon nanotubes and 100 ml of concentrated hydrochloric acid into a three-neck flask equipped with a reflux device, ultrasonically disperse for 15 min, and reflux at 80° C. while magnetically stirring. After reacting for 10 h, cool to room temperature, filter with a mixed filter, and wash the filter cake with distilled water until neutral. After vacuum drying at 60° C. for 24 h, purified carbon nanotubes were obtained.

Embodiment 2

[0026] Add 5 g of multi-walled carbon nanotubes and 600 ml of concentrated hydrochloric acid into a three-neck flask equipped with a reflux device, ultrasonically disperse for 1 h, and reflux at 120° C. while magnetically stirring. After reacting for 24 hours, cool to room temperature, filter with a mixed filter, and wash the filter cake with distilled water until neutral. After vacuum drying at 80° C. for 48 h, purified carbon nanotubes were obtained.

[0027] The concrete implementation example of the carboxylation oxidation of carbon nanotube:

Embodiment 3

[0029] 1 g of purified multi-walled carbon nanotubes and 50 ml of mixed acid (V concentrated sulfuric acid: V concentrated nitric acid = 3: 1) were ultrasonically dispersed for 15 min, then added to a hydrothermal reaction kettle, hydrothermally reacted at 100 ° C for 1 h, and cooled to room temperature. After diluting with distilled water and cooling to room temperature, the mixed filter membrane is sucked and filtered, and the filter cake is washed with distilled water until it is neutral. After vacuum drying at 60°C for 48 hours, the filter cake is ground until fine, and then continues to vacuum dry at 60°C for 48 hours to obtain carboxyl carbon nanotubes.

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Abstract

The invention discloses a method for preparing an aminated carbon nano tube. The method comprises the following steps of: purifying a carbon nano tube by using concentrated hydrochloric acid to remove impurities such as metal catalyst particles and the like from the carbon nano tube, treating the purified carbon nano tube by using a strong oxidant to introduce carboxyls to the wall and the port of the carbon nano tube, and covalently grafting biological small molecules carrying amino to the carbon nano tube through amide reaction by adopting a water reducing agent and a catalyst, namely a one-step method. According to the method, the reaction experiment conditions are mild, the grafting rate is high, the conditions are easily controlled, and the obtained product shows good water solubility and biological performance; and medicament molecules and biological macromolecules can be further grafted to the active groups introduced by grafting the small molecules, and wide application of the carbon nano tube in the field of biomedicine of medicament carriers, biosensors, tissue function and the like is promoted.

Description

technical field [0001] The invention belongs to the cross field of chemistry and biological materials, and relates to a preparation method of aminated carbon nanotubes. Background technique [0002] Since the discovery of carbon nanotubes in 1991, due to their unique structure, excellent mechanical, magnetic and electrical properties, they have attracted great attention from researchers in the field of biomedicine. Then the researchers found that the molecular weight of carbon nanotubes is huge, and the molecules have a strong mutual aggregation force, which makes carbon nanotubes almost insoluble in all solvents. In addition, the study also found that insoluble carbon nanotubes showed a certain degree of biological incompatibility in the field of biomedicine due to the presence of catalysts and amorphous carbon. This greatly limits the application of carbon nanotubes in the field of biomedicine. Therefore, improving the solubility and biocompatibility of carbon nanotubes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K47/18A61L27/08A61L27/50A61K47/04
Inventor 成晓玲王路枝胡永俊余林孙明余倩
Owner GUANGDONG UNIV OF TECH