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Process for preparing surface carboxyl modified carbon nano tube

A carbon nanotube and carboxyl group modification technology, which is applied in the field of inorganic materials, can solve problems such as application limitations, and achieve the effect of controlling the number of carboxyl groups

Inactive Publication Date: 2006-09-20
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the truncated carbon nanotubes, the application in many fields, especially the application of polymer blend materials, is greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: In a 100mL three-neck bottle, add 30mg of multi-walled carbon nanotube powder, add 50mL of toluene, ultrasonically disperse the multi-walled carbon nanotubes evenly, then add 2g of azobisisobutyronitrile, and pass nitrogen gas at room temperature to remove oxygen 25 minutes. Then the temperature was raised to 60° C., and the heating was stopped after 120 minutes of reaction, and the temperature was lowered to room temperature. The azobisisobutyronitrile-modified multi-walled carbon nanotubes are separated by filtration with a 0.45um polyvinylidene fluoride microporous membrane, and washed with toluene for 3 to 5 times.

[0018] In a 100mL single-necked round-bottomed flask, add 50mL of 2mol / L aqueous sodium hydroxide solution, then add 50mg of azobisisobutyronitrile-modified multi-walled carbon nanotubes, heat and reflux for 90 minutes, after the reaction finishes, use Filter through a 0.45um polyvinylidene fluoride microporous membrane, wash with deionized ...

Embodiment 2

[0019] Example 2: In a 100mL three-neck bottle, add 25mg of single-walled carbon nanotube powder, add 50mL of tetrahydrofuran, ultrasonically disperse the single-walled carbon nanotubes evenly, then add 5g of azobisisobutyronitrile, and pass nitrogen at room temperature to remove oxygen 30 minutes. Then the temperature was raised to 65° C., and the heating was stopped after 90 minutes of reaction, and the temperature was lowered to room temperature. The azobisisobutyronitrile-modified single-walled carbon nanotubes are separated by filtration with a 0.45um polyvinylidene fluoride microporous membrane, and washed 3 to 5 times with tetrahydrofuran.

[0020] In a 100mL single-necked round-bottomed flask, add 50mL of 2mol / L aqueous potassium hydroxide solution, then add 50mg of azobisisobutyronitrile-modified single-walled carbon nanotubes, heat and reflux for 120 minutes, after the reaction finishes, use Filter through a 0.45um polyvinylidene fluoride microporous membrane, wash ...

Embodiment 3

[0021] Example 3: In a 100mL three-neck bottle, add 30mg of multi-walled carbon nanotube powder, add 70mL of toluene, ultrasonically disperse the multi-walled carbon nanotubes evenly, then add 2g of azobisisobutyronitrile, and pass nitrogen at room temperature to remove oxygen 0.5 hours. Then the temperature was raised to 70° C., and the heating was stopped after 2 hours of reaction, and the temperature was lowered to room temperature. The azobisisobutyronitrile-modified multi-walled carbon nanotubes are separated by filtration with a 0.45um polyvinylidene fluoride microporous membrane, and washed with toluene for 3 to 5 times.

[0022] In a 100mL single-neck round bottom flask, add 50mL of 2mol / L hydrochloric acid aqueous solution, then add 50mg of azobisisobutyronitrile-modified multi-walled carbon nanotubes, heat and reflux for 140 minutes, after the reaction is completed, use 0.45um The polyvinylidene fluoride was filtered through a microporous membrane, washed five times...

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PUM

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Abstract

The present invention relates to the preparation process of surface carboxyl modified carbon nanotube. Carbon nanotube is first surface modified with azo initiator containing cyano group, and the cyano group is then hydrolyzed in alkaline or acid condition to obtain the surface carboxyl modified carbon nanotube. The present invention has simple process and easy-to-obtain material, and the prepared carboxylated carbon nanotube has the complete structure maintained and number controllable surface carboxyl group.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a preparation method of carbon nanotubes modified by surface carboxyl groups. technical background [0002] Carbon nanotubes are seamless hollow nano-scale coaxial cylinders rolled from sheet-structured graphite, and each end of the cylinder has a "cap" formed by half a fullerene sphere molecule, which can generally be divided into There are two types of single-walled carbon nanotubes composed of one layer of graphite and multi-walled carbon nanotubes composed of coaxial layers of graphite. [0003] Due to the unique internal structure of carbon nanotubes (aspect ratio, chirality, etc.), carbon nanotubes exhibit peculiar physical properties, and are a new type of material that attracts worldwide attention. It can be used to prepare field emitters, nanoelectronic devices and one-dimensional gallium nitride nanorods. Carbon nanotubes are a very potential h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02
Inventor 杨东谢世祥汪长春
Owner FUDAN UNIV
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