Carbon nano tube with high water-solubility and preparation method thereof

A carbon nanotube, water-soluble technology, applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., to achieve the effect of ensuring high purity, easy control of conditions, and simple process

Inactive Publication Date: 2007-09-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, how to obtain highly water-soluble carbon nanotubes and maintain their perfect structure

Method used

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  • Carbon nano tube with high water-solubility and preparation method thereof
  • Carbon nano tube with high water-solubility and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] Add 100mg of multi-walled carbon nanotubes to 75ml containing 0.2mol / L K 2 S 2 o 8 After ultrasonic dispersion for 30 minutes, 12.5ml of 98% concentrated sulfuric acid was added, and stirred at 60°C for 24 hours. The treatment solution was centrifuged at 16000 RPM for 15 minutes, the precipitate was diluted with water, ultrasonically dispersed and then centrifuged, and the precipitate was repeatedly diluted, ultrasonically dispersed, and centrifuged until the solution was neutral. Finally, dry the black solid precipitate to obtain K 2 S 2 o 8 Processed multi-walled carbon nanotubes.

Embodiment 2

[0025] Add 100mg of single-walled carbon nanotubes to 75ml containing 0.2mol / L K 2 S 2 o 8 After ultrasonic dispersion for 30 minutes, 12.5ml of 98% concentrated sulfuric acid was added, and stirred at 60°C for 24 hours. The treatment solution was centrifuged at 16000RPM for 15 minutes, the precipitate was diluted with water, ultrasonically dispersed, and then centrifuged. Repeatedly diluted the precipitate, ultrasonically dispersed, and centrifuged until the solution was neutral. Finally, dry the black solid precipitate to obtain K 2 S 2 o 8 processed single-walled carbon nanotubes.

Embodiment 3

[0027] Take 50mg K 2 S 2 o 8 The treated multi-walled carbon nanotubes were added to 50 ml of 0.1 wt.% aqueous solution of hydrolyzed styrene-maleic anhydride copolymer (Mn=23360), and then the mixed solution was ultrasonically dispersed for 2 hours.

[0028] The obtained ultrasonic dispersion was centrifuged at a speed of 16000 RPM for 15 minutes. The supernatant was discarded, and the precipitate obtained by centrifugation was added to 50 ml of a 0.1 wt.% hydrolyzed styrene-maleic anhydride copolymer aqueous solution, and then the mixed solution was ultrasonically dispersed for 60 minutes. The obtained ultrasonic dispersion liquid was centrifuged at a speed of 16000 RPM for 15 minutes, and the supernatant liquid was collected. The resulting precipitate was added to 50ml of 0.1wt.% aqueous solution of hydrolyzed styrene-maleic anhydride copolymer and repeated ultrasonic dispersion for 60 minutes, followed by centrifugation at 16,000 RPM for 15 minutes, and repeated 9 cycle...

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Abstract

The present invention discloses a high water soluble carbon nanotube and a preparation method of the same. In the present invention, the carbon nanotube experiences noncovalent bond combinative coating modification by using the pi-pi conjugation between the hydrolysis styrene-maleic anhydride copolymer and the carbon nanotube; the dispersion stability of the carbon nanotube in water is improved by using the carboxylic acid anion with good water solubility of the copolymers; so that the water solubility of the carbon nanotube is greatly improved. The water solubility carbon nanotube coated by hydrolysis styrene-maleic anhydride copolymer is obtained by using hydrolysis styrene-maleic anhydride copolymer, carbon nanotube and water as raw material, adopting a circular fashion to inject hydrolysis styrene-maleic anhydride copolymers, and using an ultra sonic dispersion method and centrifugal method. The present invention has the advantages of that the technology is simple, the obtained water solubility carbon nanotube has a solubility of 29.2 mg/ml and an excellent stability, and the styrene-maleic anhydride copolymer has a simple preparation process and a lower cost, so that the large scale preparation and the industrial application of the water solubility carbon nanotube can be greatly improved.

Description

technical field [0001] The invention relates to a highly water-soluble carbon nanotube and a preparation method thereof, in particular to a polymer-coated highly water-soluble carbon nanotube and a preparation method thereof. Background technique [0002] Carbon nanotubes have attracted widespread attention in the scientific and industrial circles due to their unique structure and excellent optical, electrical, magnetic and mechanical properties. However, the poor water solubility of carbon nanotubes is a bottleneck that limits their large-scale production and application. One, especially in the fields of biology and environment-friendly materials. Therefore, a variety of methods have been proposed to improve the water solubility of carbon nanotubes, one of which is to covalently derivatize the side walls or ports of carbon nanotubes through various chemical modification methods to achieve their dissolution and dispersion or effective exfoliation. , or use long-term acid ox...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00
Inventor 汪茫薛朝华陈红征施敏敏吴刚
Owner ZHEJIANG UNIV
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