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Carbon nano tube with grafted amine functional groups and preparation method

A carbon nanotube and functional group technology, applied in the field of nanomaterials, can solve the problems of structural integrity damage, high cost, cumbersome chemical treatment route operation, etc., to achieve the effect of improving modification efficiency, reducing structural damage and performance loss

Inactive Publication Date: 2010-04-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This chemical treatment will cause certain damage to the structural integrity of carbon nanotubes, and will cause excessive damage to the structural integrity and high mechanical properties of carbon nanotubes, thus affecting the mechanical properties of the composite material and even the electrical and thermal conductivity. It has a great negative impact; at the same time, the chemical treatment route is cumbersome to operate, with low efficiency, high cost, high control requirements, and poor environmental performance

Method used

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  • Carbon nano tube with grafted amine functional groups and preparation method
  • Carbon nano tube with grafted amine functional groups and preparation method
  • Carbon nano tube with grafted amine functional groups and preparation method

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Experimental program
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Effect test

Embodiment 1

[0026] The carbon nanotubes, ethylenediamine and anhydrous pyridine were mixed according to a molar ratio of 1:3:4, stirred in an anhydrous environment for 15 minutes, and ultrasonically dispersed for 30 minutes. The mixed solution was placed in a linear electron accelerator, irradiated with an electron beam with a radiation dose rate of 120kGy / h, and the total irradiation dose was 200kGy; after irradiation, the mixed liquid was dried in a vacuum oven at 60°C to obtain a solid sample . The obtained samples were analyzed by infrared spectroscopy, which can prove the success of ethylenediamine grafting.

[0027] Such as figure 1 Shown in (a); The carbon nanotubes of the grafted amine functional group that present embodiment prepares, its structural formula is CNT-HN-(CH 2 ) 2 -NH 2 , and its molecular structure is:

[0028]

[0029] Using a high-resolution transmission electron microscope, it can be observed that grafting has been achieved on the outer surface of the car...

Embodiment 2

[0032] Mix carboxylated carbon nanotubes, hexamethylenediamine and DMF at a molar ratio of 1:0.1:10, stir for 5 minutes in an anhydrous environment, and disperse ultrasonically for 10 minutes. The mixed solution was placed in Co 60 Among the γ-rays, the electron beam was irradiated with a radiation dose rate of 10kGy / h, and the total radiation dose was 80kGy; after irradiation, the mixed liquid was dried in a vacuum oven at 60°C to obtain a solid sample. The obtained samples were analyzed by infrared spectroscopy, which can prove the success of hexamethylenediamine grafting.

[0033] Such as figure 1 Shown in (b); The carbon nanotubes of the grafted amine functional group that present embodiment prepares, its structural formula is CNT-HN-(CH 2 ) 6 -NH 2 , and its molecular structure is:

[0034]

[0035] Using a high-resolution transmission electron microscope, it can be observed that grafting has been achieved on the outer surface of the carbon nanotubes, and the carb...

Embodiment 3

[0038] Mix carbon nanotubes, diethylenetriamine and ethyl acetate at a molar ratio of 1:10:100, stir for 15 minutes in an anhydrous environment, and ultrasonically disperse for 30 minutes. The mixed solution was placed in a linear electron accelerator, irradiated with an electron beam with a radiation dose rate of 200kGy / h, and the total irradiation dose was 600kGy; after irradiation, the mixed liquid was dried in a vacuum oven at 60°C to obtain a solid sample . The obtained samples were analyzed by infrared spectroscopy, which can prove the success of diethylenetriamine grafting.

[0039] Such as figure 1 Shown in (c); the carbon nanotubes of the grafted amine functional group that present embodiment prepares, and its structural formula is CNT-HN-(CH 2 )6 -NH-(CH 2 ) 6 -NH 2 , and its molecular structure is:

[0040]

[0041] Using a high-resolution transmission electron microscope, it can be observed that grafting has been achieved on the outer surface of the carbon...

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Abstract

The invention relates to a preparation method for a carbon nano tube with grafted amine functional groups, belonging to the technical field of composite nano materials. The preparation method comprises the following steps: mixing carbon nano tubes, amines and organic solutions according to the mol ratio of 1:(0.10-10):(10-1000) to obtain a mixture; irradiating the obtained mixture by an electron beam irradiating source and drying to obtain the carbon nano tube with grafted amine functional groups. The invention uses the electron beam irradiation to treat the mixture of the carbon nano tubes, the amines and the liquid media, and directly carries out the modification of the grafted amine functional groups on the carbon nano tube. The method can greatly reduce the structural damage and the performance of the carbon nano tube caused by the chemical modification way, improve the modification efficiency of the carbon nano tube, and has the technical advantages of high efficiency, environment friendliness, low consumption, easy control and the like.

Description

technical field [0001] The invention relates to a carbon nanotube in the technical field of nanomaterials and a preparation method thereof, in particular to a carbon nanotube grafted with amine functional groups and a preparation method thereof. Background technique [0002] Polymer-based carbon nanotube composites are a research hotspot in the field of nanomaterials. Due to the low density, ultra-high strength, ultra-high modulus, high elasticity, high electrical and thermal conductivity, and high heat and corrosion resistance of carbon nanotubes, carbon nanotube composites are expected to have excellent comprehensive mechanical properties and physical and chemical properties. performance. However, the dispersion of carbon nanotubes has always been a bottleneck problem affecting its application. In composite materials, if good dispersion of carbon nanotubes cannot be achieved, carbon nanotubes mostly exist in the form of aggregates, which not only cannot exert super toughn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00B82B3/00
Inventor 李华刘河洲路雁雁陈晓芸伍惠雯
Owner SHANGHAI JIAO TONG UNIV