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Method of modifying multiwall carbon nano-tube

A multi-walled carbon nanotube, vacuum drying technology, applied in the nano field, can solve the problems of non-stable chemical bond connection, no biological and chemical stability, etc., achieve good solvent dispersibility and biocompatibility, simple synthesis method, good controllability

Inactive Publication Date: 2007-04-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that the interfacial self-assembly between multi-walled carbon nanotubes and lipid molecules is only through physical adsorption, and there is no stable chemical bond connection, making the structure not biologically and chemically stable.

Method used

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  • Method of modifying multiwall carbon nano-tube
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  • Method of modifying multiwall carbon nano-tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The multi-walled carbon nanotubes prepared by catalytic pyrolysis method are used as the initial raw material, and after acidification and acylation, they are reacted with phospholipids with amine groups to prepare water-soluble phospholipid-modified multi-walled carbon nanotubes through the covalent interaction of amide bonds. nanotube.

[0028] Step a: In a 100 ml single-necked round-bottomed flask equipped with a magnetic stirring rotor, add 0.5 g of dry multi-walled carbon nanotube raw material and 20 ml of 70% nitric acid, and after 20 kHz ultrasonic treatment for 30 minutes, heat up to 120 Celsius, reflux reaction for 24 hours under stirring, suction filtration with Φ0.22 micron polycarbonate microporous membrane, repeated washing with deionized water to neutrality, vacuum drying at 60 degrees Celsius for 12 hours, and acidified multi-walled carbon nano Tube 0.3125 g.

[0029] Step b: In a 100 ml single-necked round bottom flask equipped with a magnetic stirring ...

Embodiment 2

[0032] The multi-walled carbon nanotubes prepared by the template method are used as the initial raw material. After acidification and acylation, they are reacted with phospholipids with amine groups to prepare water-soluble phospholipid-modified multi-walled carbon nanotubes through the covalent interaction of amide bonds. .

[0033] Step a: In a 100 ml single-neck round bottom flask equipped with a magnetic stirring rotor, add 0.01 g of dry multi-walled carbon nanotube raw material and 5 ml of 70% nitric acid, and after 20 kHz ultrasonic treatment for 30 minutes, heat up to 120 Celsius, reflux reaction for 24 hours under stirring, suction filtration with Φ0.22 micron polycarbonate microporous membrane, repeated washing with deionized water to neutrality, vacuum drying at 60 degrees Celsius for 10 hours, to obtain acidified multi-walled carbon nano Tube 0.015 g.

[0034] Step b: In a 100 ml single-neck round bottom flask equipped with a magnetic stirring rotor, add 0.01 g of...

Embodiment 3

[0037] The multi-walled carbon nanotubes prepared by laser evaporation method are used as the initial raw material. After acidification and acylation, they are reacted with phospholipids with amine groups to prepare water-soluble phospholipid-modified multi-walled carbon nanotubes through the covalent interaction of amide bonds. Tube.

[0038] Step a: In a 100 ml single-neck round bottom flask equipped with a magnetic stirring rotor, add 1 gram of dry multi-walled carbon nanotube raw material and 50 ml of 70% nitric acid, and after 20 kHz ultrasonic treatment for 30 minutes, heat up to 120 Celsius, reflux reaction for 24 hours under stirring, suction filtration with Φ0.22 micron polycarbonate microporous filter membrane, repeated washing with deionized water to neutrality, and vacuum drying at 60 degrees Celsius for 30 hours to obtain acidified multi-walled carbon nano Tube 1.025 g.

[0039] Step b: In a 100 ml single-neck round bottom flask equipped with a magnetic stirring ...

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Abstract

The present invention provides a method for modifying multiwall carbon nano tube, belonging to the field of nano technology. Said method includes the following several steps: (a), adding dried multiwall carbon nano tube raw material and strong oxidative acid into a flask, making ultrasonic treatment, heating, making reflux reaction under the condition of stirring, filtering, repeatedly washing to make the above-mentioned solution be reached to neutrality, vacuum drying so as to obtain acidified multiwall carbon nano tube; (b), adding the above-mentioned acidified multiwall carbon nano tube and acylacting agent into a flask, heating, making reflux reaction under the condition of stirring, filtering, reduced pressure distillation, vacuum drying so as to obtain the acylated multiwall carbon nano tube; and (c), adding the acylated multiwall carbon nano tube and dehydration reagent into flask, at the same time adding the solvent with aminophospholipid into said flask, making ultrasonic treatment, heating, making reflux reaction under the condition of stirring, filtering, repeatedly washing, vacuum drying so as to obtain the multiwall carbon nano tube modified by water-soluble phospholipids.

Description

technical field [0001] The invention relates to a method in the field of nanotechnology, in particular to a method for modifying multi-walled carbon nanotubes. Background technique [0002] Since the discovery of multi-walled carbon nanotubes, people have begun to study the application of this new type of nanomaterials in various fields, such as molecular circuits, sensor devices, high-strength fibers, and field emission. Multi-walled carbon nanotubes have excellent conductivity and tensile strength, so they are expected to be practically applied in functional field-effect semiconductor circuits; as chemical sensing devices, multi-walled carbon nanotubes can greatly improve nano tube conductivity. However, this series of remarkable scientific research results cannot conceal some limitations of multi-walled carbon nanotubes, such as their difficulty in uniform dispersion in solvents. These limitations must be overcome in order to promote the practical application of this ne...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 何鹏朱新远
Owner SHANGHAI JIAO TONG UNIV
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