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Water-soluble carbon nano tube and preparation method thereof

A carbon nanotube, water-soluble technology, applied in the field of materials, can solve the problems of harsh reaction conditions and complicated operation steps, and achieve the effect of great significance and avoiding complicated steps.

Inactive Publication Date: 2008-05-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of harsh reaction conditions and complicated operation steps in the existing carbon nanotube modification technology, and to obtain a method for modifying carbon nanotubes with an azide-terminated water-soluble polymer method, and prepared this water-soluble azido-grafted carbon nanotube

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  • Water-soluble carbon nano tube and preparation method thereof
  • Water-soluble carbon nano tube and preparation method thereof
  • Water-soluble carbon nano tube and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] Example 1: Preparation of water-soluble single-walled carbon nanotube-g-polyethylene glycol monomethyl ether 750

[0029] (a) Add 40ml of 98% nitric acid, 40ml of 96% sulfuric acid and 120ml of dichloromethane into the three-necked flask successively, stir and cool to 0-5°C. 30 ml of dichloromethane dissolved in 20 g of hydroxyl-terminated polyethylene glycol monomethyl ether 750 was slowly added dropwise. The temperature is maintained at 5-8°C. After the dropwise addition, the reaction was continued for 1 h. After the reaction, the reaction mixture was poured into ice water, the dichloromethane layer was separated, and washed continuously with water and 50 wt% aqueous sodium bicarbonate until neutral. After removing the solvent, polyethylene glycol monomethyl ether 750 terminated with nitrate group was obtained.

[0030] (b) Put 10mmol of polyethylene glycol monomethyl ether 750 terminated by nitrate group, 21mmol of sodium azide, and 15mL of distilled water into a t...

Embodiment 2

[0033] Example 2: Preparation of water-soluble multi-walled carbon nanotube-g-polyethylene glycol monomethyl ether 750

[0034] (a) Add 40ml of 98% nitric acid, 40ml of 96% sulfuric acid and 120ml of dichloromethane into the three-necked flask successively, stir and cool to 0-5°C. 30 ml of dichloromethane dissolved in 20 g of hydroxyl-terminated polyethylene glycol monomethyl ether 750 was slowly added dropwise. The temperature is maintained at 5-8°C. After the dropwise addition was completed, the reaction was continued for 1 h. After the reaction, the reaction mixture was poured into ice water, the dichloromethane layer was separated, and washed continuously with water and 50 wt% aqueous sodium bicarbonate until neutral. After removing the solvent, polyethylene glycol monomethyl ether 750 terminated with nitrate group was obtained.

[0035](b) Put 10mmol of polyethylene glycol monomethyl ether 750 terminated by nitrate group, 21mmol of sodium azide, and 15mL of distilled w...

Embodiment 3

[0038] Embodiment 3: Preparation of water-soluble single-walled carbon nanotube-g-polyethylene glycol monooctyl ether 600

[0039] (a) Add 40ml of 98% nitric acid, 40ml of 96% sulfuric acid and 120ml of dichloromethane into the three-necked flask successively, stir and cool to 0-5°C. 30 ml of dichloromethane dissolved in 20 g of hydroxyl-terminated polyethylene glycol monocaprylyl ether 600 was slowly added dropwise. The temperature is maintained at 5-8°C. After the dropwise addition was completed, the reaction was continued for 1 h. After the reaction, the reaction mixture was poured into ice water, the dichloromethane layer was separated, and washed continuously with water and 50 wt% aqueous sodium bicarbonate until neutral. After removing the solvent, polyethylene glycol monooctyl ether 600 terminated by nitrate group was obtained.

[0040] (b) Put 10 mmol of nitrate group-terminated polyethylene glycol monooctyl ether 600, 21 mmol of sodium azide, and 15 mL of distilled...

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Abstract

The invention relates to a preparation method of a water-soluble carbon nano-tube (CNT). Firstly, the macromolecule water-soluble polymers with hydroxyl as the terminal group are utilized to synthesize the water-soluble polymer, wherein, the terminal group of the water-soluble polymer has a nitrate group, and then the nitrate group is transformed to be an azide group to obtain the water-soluble polymers end-capped with azide group. Then the azide group and the surface of the carbon nano-tubes (CNT) conduct a cycloaddition reaction, thus the water-soluble polymers are grafted to the surface of the carbon nano-tubes (CNT) in covalent bond form, so as to realize preparation of water-soluble carbon nano-tubes (CNT). The invention has the advantages of simple process, easy operation and avoidance of damages to tube walls of the carbon nano-tube (CNT) in acid treatment and of cutting the carbon nano-tubes (CNT). Therefore entyre water-soluble carbon nano-tubes (CNT) are available with the invention, the invention is significant in the research and application of chemical and physical properties of the water-soluble carbon nano-tubes (CNT).

Description

technical field [0001] The invention belongs to the field of materials and relates to carbon nanotubes, in particular to chemically modified carbon nanotubes. Background technique [0002] Carbon nanotubes have excellent physical, chemical and mechanical properties, and they have great potential application value in many aspects. The preparation of carbon nanotube / polymer composite materials can improve the mechanical properties of polymers, prepare photoelectric functional materials, lubricating additives, etc. At present, polymer / carbon nanotube composites have become the main research and application direction of carbon nanotubes. However, carbon nanotubes with a micron-scale length are insoluble in water and organic solvents, and are usually mixed with a polymer solution to form a suspoemulsion state. In the final composite material, there is an undesirable aggregation state, and the intertwined carbon nanotube coils are not formed. Can not give full play to its own ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 王国建董玥
Owner TONGJI UNIV
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