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Halobenzene functionalized and modified carbon nano tube and preparation method thereof

A technology of carbon nanotubes and nanotubes, which is applied in the field of surface modification of nanomaterials, can solve the problems of large specific surface area, easy agglomeration, and difficult dispersion of carbon nanotubes, and achieve the effect of improving dispersion and interfacial compatibility

Active Publication Date: 2015-04-29
NO 11 INST OF NO 6 ACADEMY OF CHINA AEROSPACE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the existing carbon nanotubes have a large specific surface area and are easily agglomerated, it is difficult to disperse well in the polymer matrix, and the interface interaction between the two is weak, which makes it difficult to exert the expected effect in composite materials , the invention provides a method for functional modification of the surface of carbon nanotubes.

Method used

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  • Halobenzene functionalized and modified carbon nano tube and preparation method thereof
  • Halobenzene functionalized and modified carbon nano tube and preparation method thereof
  • Halobenzene functionalized and modified carbon nano tube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of oxidized multi-walled carbon nanotubes:

[0029] Add 30 parts of multi-walled carbon nanotubes and 320 parts of concentrated sulfuric acid into a reactor with a stirrer and a thermometer, and react at a temperature of 90°C for 2 hours; slowly pour the reaction solution into 1000 parts of deionized water, and vacuum filter And washed with deionized water several times until the filtrate was neutral. The obtained oxidized multi-walled carbon nanotubes were dried in a vacuum oven at 120° C. for 24 hours to obtain dried oxidized multi-walled carbon nanotubes.

[0030] (2) Preparation of acylated multi-walled carbon nanotubes:

[0031] 30 parts of dry oxidized multi-walled carbon nanotubes, 100 parts of thionyl chloride, 4 parts of pyridine, and 160 parts of anhydrous nitromethane were added to a reactor with a stirrer, a thermometer and a condenser tube, at a temperature of 80 ℃ for 2.5 hours in the dark; vacuum filtration and repeated washing with anhy...

Embodiment 2

[0035] (1) Preparation of oxidized single-walled carbon nanotubes:

[0036] Add 30 parts of single-walled carbon nanotubes and 160 parts of concentrated nitric acid into a reactor with a stirrer and a thermometer, and react at a temperature of 50°C for 12 hours; slowly pour the reaction solution into 400 parts of deionized water, and vacuum filter And washed with deionized water several times until the filtrate was neutral. The obtained oxidized single-walled carbon nanotubes were dried in a vacuum oven at 120° C. for 24 hours to obtain dry oxidized single-walled carbon nanotubes.

[0037] (2) Preparation of acylated single-walled carbon nanotubes:

[0038] 30 parts of dry oxidized single-walled carbon nanotubes, 20 parts of phosphorus pentachloride, 1 part of triethylamine, and 40 parts of anhydrous methylene chloride are added to a reactor with a stirrer, a thermometer and a condensing tube. The reaction was carried out at 30° C. and protected from light for 24 hours; vacu...

Embodiment 3

[0042] (1) Preparation of oxidized single-walled carbon nanotubes:

[0043] Add 30 parts of single-walled carbon nanotubes, 90 parts of concentrated sulfuric acid, and 30 parts of concentrated nitric acid into a reactor with a stirrer and a thermometer, and react at a temperature of 60°C for 5 hours; slowly pour the reaction solution into 300 parts of deionized water , vacuum filtered and washed with deionized water several times until the filtrate was neutral. The obtained oxidized single-walled carbon nanotubes were dried in a vacuum oven at 120° C. for 24 hours to obtain dry oxidized single-walled carbon nanotubes.

[0044] (2) Preparation of acylated single-walled carbon nanotubes:

[0045] Add 30 parts of dry oxidized single-walled carbon nanotubes, 70 parts of phosphorus trichloride, 2.5 parts of 4-dimethylaminopyridine, and 100 parts of anhydrous chloroform into a reactor with a stirrer, a thermometer and a condenser tube reaction at a temperature of 50° C. in the dar...

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Abstract

The invention provides a halobenzene functionalized and modified carbon nano tube and a preparation method thereof. The halobenzene functionalized and modified carbon nano tube is characterized in that after carboxy groups on the surface of a carbon nano tube are acylated, the halobenzene functionalized carbon nano tube is prepared through Friedel-crafts reaction by using a Lewis acid as a catalyst and using halobenzene as a modifying agent. The dosage of an oxidizing agent and the processing time are controlled during oxidization, so that the adoption amount of carboxy groups is controlled, and further the number of halobenzene ketone structures grafted by the carbon nano tube is controlled; the types of halobenzene are changed so as to obtain multiple kinds of halobenzene functionalized carbon nano tubes. The obtained modified carbon nano tubes have good solubleness in organic solvents, such as NMP and DMF, the carbon nano tubes can be well dispersed in a resin matrix by an in-situ polymerization and in-situ compounding method, and the obtained modified carbon nano tubes can be used for preparing high-performance nano composite materials, high-strength film materials and high-performance fibers, and can also be used for preparing superfine fibers and non-woven fabrics through electrostatic spinning. Therefore, the surface-functionalized modified carbon nano tube prepared by the method disclosed by the invention can be applied to the fields of plastic and fiber modification, and electrostatic spinning.

Description

technical field [0001] The invention relates to a method for modifying the surface of carbon nanotubes, belonging to the field of surface modification of nanometer materials. Background technique [0002] Carbon nanotubes are increasingly used as polymer reinforcement or multifunctional filling materials because of their excellent mechanical properties, thermal conductivity, chemical, energy storage and electrical conductivity. As a polymer filler, carbon nanotubes can only effectively play the role of reinforcement or heat resistance when they are uniformly dispersed in the polymer matrix. Due to the high specific surface area of ​​carbon nanotubes, they are very easy to agglomerate, and it is difficult to disperse well in the polymer matrix. The interfacial interaction between the two is weak, which makes it difficult for them to exert the expected effect in composite materials. Therefore, how to uniformly disperse the carbon nanotubes into the resin matrix, and fully com...

Claims

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Application Information

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IPC IPC(8): C09C1/44C09C3/06C09C3/08
Inventor 李东升
Owner NO 11 INST OF NO 6 ACADEMY OF CHINA AEROSPACE SCI & TECH
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