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Highly water-soluble carbon nanometer tube preparation method

A carbon nanotube, water-soluble technology, applied in the nano field, can solve the problems of insolubility and dispersion of carbon nanotubes, hindering the chemical development of carbon nanotubes, application of carbon nanotube/polymer composite materials, easy agglomeration, etc.

Inactive Publication Date: 2007-04-04
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the huge molecular weight of carbon nanotubes, it directly leads to the insolubility of carbon nanotubes (that is, poor dispersion and easy agglomeration), so that carbon nanotubes cannot 60 It is easy to carry out organic chemical reactions, which seriously hinders the development of carbon nanotube chemistry and the application of carbon nanotube / polymer composites.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0050] Add 1 gram of multi-walled carbon nanotubes and 40 milliliters of HNO in a 100 milliliter three-necked bottle equipped with a reflux condensing device and a nitrogen dioxide gas treatment device 3 Solution (concentration is 12M), reflux at 60 ℃, magnetic stirring or mechanical stirring at the same time, after reacting for 24 hours, cool to room temperature, add 80 milliliters of distilled water to dilute, let stand until the precipitation of carbon nanotubes is complete, pour off the supernatant, The suspension in the lower layer was filtered with a polytetrafluoroethylene membrane with a pore size of 0.22 μm, washed with water until the filtrate dripped A black filter cake of carbon nanotubes was obtained, which was vacuum-dried at 60° C. for 24 hours, thereby obtaining purified carbon nanotubes. The content of carboxyl groups on the carbon nanotubes is 1% (determined by acid-base titration).

Embodiment 2

[0052] Step is as implementing example 1, with HNO 3 The solution concentration was changed to 5M. At this time, the amount of carboxyl groups present on the resulting carbon nanotubes was reduced to 0.3%.

Embodiment 3

[0054] Step is as implementing example 1, with HNO 3 The solution concentration was changed to 1M. At this time, the amount of carboxyl groups present on the resulting carbon nanotubes was reduced to 0.1%.

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Abstract

The invention relates to preparation method for high water-soluble nano carbon tube, which comprises acidifying purifying treatment, acylchloridization and grafting. Wherein, based on not destroying its high length-diameter ratio and electron valence band structure, using chemical modification to graft lycine on wall and end of the tube to endow its high water-solubility of 30mg / ml and biocompatibility; reflowing the tube in HNO3 to remove the impurity metal catalyst particle and carboxylate the tube; then, reflowing tube in SOCl2 for completed acylchloridization; finally, acyl chloride group and amido in grafted lycine react to obtain the product.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and in particular relates to a preparation method of highly water-soluble carbon nanotubes. Background technique [0002] As human beings realize that nanotechnology will become the leading technology in the 21st century, it is more and more urgent for people to master and utilize nanotechnology, so as to realize all-round leapfrog development of society, economy and science and technology. Among them, the discovery of carbon nanotubes is a milestone in the history of the world. In the past ten years, carbon nanotubes have been the focus of scientific research in the world. Due to their unique internal structure (aspect ratio, chirality, etc.) New one-dimensional nanomaterials have important application prospects in many fields and are one of the most promising nanomaterials in the 21st century. [0003] However, due to the huge molecular weight of carbon nanotubes, it directly leads to the insolu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 陈春海胡南滔周宏伟党国栋
Owner JILIN UNIV
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