Preparation method for water soluble carbon nanotube

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...

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.

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