Preparation method for water soluble carbon nanotube

A carbon nanotube, water-soluble technology, applied in the field of preparing water-soluble carbon nanotubes, can solve the problems of limiting the large-scale practical application of carbon nanotubes, destroying the perfect structure of carbon nanotubes, difficult to control the processing process, etc. Industrial application, good water solubility, mild effect

Inactive Publication Date: 2007-08-15
WUHAN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two types of dispersion or dissolution methods for carbon nanotubes: one is to covalently derivatize the side walls of carbon nanotubes or the ports after opening tubes through various chemical covalent modification methods to achieve their dissolution and dispersion or effective stripping, Although this method has good solubility and high stripping efficiency, it will destroy the perfect structure of carbon nanotubes and affect their various excellent properties, and the processing process is complicated and difficult to control; the other is to use various non-covalent modification methods. Polymers or small molecule aggregates (such as surfactant micelles) wrap carbon nanotubes to realize their dissolution, dispersion and exfoliation. This method has little damage to carbon nanotubes and basically maintains their original properties, but often Has the disadvantages of low solubility, poor stability, and low stripping efficiency, and some methods require expensive specific synthetic reagents
All these unfavorable factors greatly limit the large-scale practical application of carbon nanotubes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for water soluble carbon nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Commercialized carbon nanotubes were refluxed and purified with 2.6mol / L dilute nitric acid for 48 hours, washed with water to neutrality and dried, and then the purified carbon nanotubes obtained were mixed with excess disazo dyes and ground for 2 hours to obtain The mixture of carbon nanotubes and azo dyes can be completely dissolved in water, wherein the excess free azo dyes can be removed by washing with water without reducing the water solubility of carbon nanotubes.

Embodiment 2

[0014] Commercialized carbon nanotubes were refluxed and purified with 2.6mol / L dilute nitric acid for 48 hours, washed with water to neutrality and dried, and the obtained purified carbon nanotubes were mixed with excess disazo dyes, dissolved in an appropriate amount in water, and placed in Sonicate in a high-power sonicator until there is no solid residue, and the excess free azo dye can be removed by washing with water without reducing the water solubility of the carbon nanotubes.

[0015] The excellent solubility in water of the water-soluble carbon nanotubes prepared by non-covalent modification provided by the present invention will be described below with reference to the accompanying drawings. It can be clearly seen from the figure that although the 48-hour reflux purification process of dilute nitric acid, the carbon nanotubes are still completely insoluble in water ((a) in the accompanying drawing); , most of the carbon nanotubes were settled down, and only a small ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a preparation method for water soluble carbon nanotube, which is based on non-covalence surface finishing to the carbon nanotube by disazo dye molecule, a high water-solubility and effective detachment is realized for the carbon nano tubes. The method comprises using azo-dyes, carbon nano tube and water as raw material, purifying the commercial carbon nano tube and washing into neutral, drying and mixing the obtained purified carbon nano tube with excess azo-dyes, fully dissolving or dispersing the carbon nano tube through the conventional physical abrasion or supersonic dispersion.

Description

technical field [0001] The invention relates to a method for preparing water-soluble carbon nanotubes based on the non-covalent modification of disazo dye molecules, which is suitable for the dissolution, purification, separation, derivation and subsequent practical application of the carbon nanotubes. Background technique [0002] Since their discovery in 1991, carbon nanotubes have been favored by many researchers for their unique structure, electrical, mechanical and optical properties and their potential wide application prospects in the field of nanotechnology. Almost every possible practical application requires carbon nanotubes to have good solubility or dispersion properties. However, industrially large-scale synthesized carbon nanotubes often contain various impurities including catalysts and various amorphous carbons. Moreover, due to the strong intertube van der Waals attraction between carbon nanotubes and the large specific surface area of ​​carbon nanotubes, c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02
Inventor 胡胜水胡成国
Owner WUHAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap