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Method for preparing hydrophilic carbon nano tube

A carbon nanotube and hydrophilic technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of unsatisfactory functionalization effect, uncontrollable polymer molecular weight and structure, etc., and achieve polymer molecular weight and structure Controllable, good water solubility, high reactivity effect

Inactive Publication Date: 2010-04-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the unsatisfactory functionalization effect of the "insertion method" and the uncontrollable molecular weight and structure of the polymer grafted by the "grafting method", the purpose of the present invention is to propose a new method of grafting water-soluble polymers by cycloaddition reaction. Method for preparing hydrophilic carbon nanotubes

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  • Method for preparing hydrophilic carbon nano tube
  • Method for preparing hydrophilic carbon nano tube
  • Method for preparing hydrophilic carbon nano tube

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Single-wall carbon nanotubes (purity ≥ 90%, diameter 1-2nm) prepared by catalytic pyrolysis are used as initial raw materials, treated with oleum to remove impurities in the raw materials, and simultaneously obtain dispersed carbon nanotubes. Then use p-alkynyl aniline compounds to generate diazonium salt under certain conditions, and react with carbon nanotubes treated with oleum to generate terminal alkyne functionalized carbon nanotubes. Replace the hydroxyl group of the hydroxyl-containing water-soluble polymer with a halogen group, and then replace the halogen group with an azido group to prepare an azide water-soluble polymer; the carbon azide water-soluble polymer and the terminal alkyne functionalized Nanotubes undergo [3+2] cycloaddition reaction to obtain hydrophilic carbon nanotubes. Specific steps are as follows:

[0020] Step (a): Add 100 mg of dry single-walled carbon nanotubes and 100 mL of fuming sulfuric acid with a sulfur trioxide content of 20% in a ...

Embodiment 2

[0024] Example 2: Multi-walled carbon nanotubes (purity ≥ 95%, pipe diameter 8-10 nm) prepared by CVD as the initial raw material, treated with oleum to remove impurities in the raw material, and simultaneously obtain dispersed carbon nanotubes . Then use p-alkynyl aniline compounds to generate diazonium salt under certain conditions, and react with carbon nanotubes treated with oleum to generate terminal alkyne functionalized carbon nanotubes. Replace the hydroxyl group of the hydroxyl-containing water-soluble polymer with a halogen group, and then replace the halogen group with an azido group to prepare an azide water-soluble polymer; the carbon azide water-soluble polymer and the terminal alkyne functionalized Nanotubes undergo [3+2] cycloaddition reaction to obtain hydrophilic carbon nanotubes. Specific steps are as follows:

[0025] The single-walled carbon nanotubes added in step (a) of Example 1 were changed to multi-walled carbon nanotubes, and the added 3.896 g of p...

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Abstract

The invention relates to a preparation method of hydrophilic carbon nano-tubes (CNT) which enables to graft water-soluble polymers by means of cycloaddition reaction. Firstly, purified and dispersed carbon nano-tubes (CNT) are available after the carbon nano-tubes (CNT) treated with fuming sulfuric acid; secondly, diazonium salt is generated with double-alkynyl aniline compound under certain conditions, and then is reacted with the carbon nano-tubes (CNT) treated with fuming sulfuric acid to obtain the carbon nano-tubes (CNT) with functionalized terminal alkynyl; thirdly, hydroxyl groups in water-soluble polymers are replaced with halogen groups, and the halogen groups are in turn replaced with azide groups to obtain azide water-soluble polymers; fourthly, [3+2] cycloaddition reaction is performed between the azide water-soluble polymers and the carbon nano-tubes (CNT) with functionalized terminal alkynyl to generate the hydrophilic carbon nano-tubes (CNT). The invention has the advantages that the generated hydrophilic carbon nano-tubes (CNT) has good water solubility, and the molecular weight and structure of the generated hydrophilic carbon nano-tubes (CNT) are controllable dueto the pre-prepared water-soluble polymers used for grafting; Besides, due to the high reactive activity of the [3+2] cycloaddition reaction, the chemical modification upon the surface of the carbon nano-tubes (CNT) becomes easier.

Description

technical field [0001] The invention belongs to the field of materials, and relates to the surface modification of carbon nanotubes, in particular to a method for preparing hydrophilic carbon nanotubes. Background technique [0002] Carbon nanotubes have excellent intrinsic properties of graphite, such as a series of comprehensive properties such as heat resistance, corrosion resistance, good heat transfer and electrical conductivity, high temperature strength, self-lubrication and biocompatibility. Its most prominent features are: the fine structure formed at the nanoscale, the special electrical properties created by the nanostructure, and the ultra-high mechanical properties built by carbon bonds. [0003] Due to the superior properties of carbon nanotubes, the application prospects of carbon nanotubes are immeasurable. However, carbon nanotubes are insoluble in water and other solvents. In solvents or composite materials, carbon nanotubes aggregate into clusters, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 刘琳黄思浙王国建王翀
Owner TONGJI UNIV