Polymer inarching carbon nano-tube and method of manufacturing the same

A technology of carbon nanotubes and polymers, applied in the field of polymer-grafted carbon nanotubes and its preparation, can solve the problems of long preparation time, high cost and cumbersome process of modified carbon nanotubes, and achieve good solubility and polymerization The effects of physical compatibility and good water dispersion stability

Inactive Publication Date: 2008-01-23
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the above-mentioned preparation methods of modified carbon nanotubes have more or less disadvantages such as long preparation time, complicated process, and high cost, which have certain limitations in practical applications.

Method used

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  • Polymer inarching carbon nano-tube and method of manufacturing the same
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  • Polymer inarching carbon nano-tube and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, preparation polytetrahydrofuran graft modified carbon nanotube

[0031] Step (a): Add 0.2 g of raw material carbon nanotubes into an Erlenmeyer flask filled with 40 ml of concentrated sulfuric acid and concentrated nitric acid (volume ratio 3:1), and then put it into an ultrasonic instrument for ultrasonication for 3 hours. After the ultrasound is over, pour a large amount of deionized water to dilute, and then use filter paper with a pore size of 220nm to filter. The solid above is washed with deionized water continuously until the extracted water is about neutral. Dry the solid in a vacuum oven to obtain acidified carbon nanotubes.

[0032] Step (b): Add 0.2 g of the acidified carbon nanotubes obtained in step (a) into 50 ml of freshly steamed thionyl chloride and heat to reflux for 24 hours to convert the carboxyl groups on the surface of the carbon nanotubes into acid chlorides. The product was filtered through a cellulose filter paper with a pore siz...

Embodiment 2

[0035] Example 2: Preparation of polyepichlorohydrin graft modified carbon nanotubes and polyepichlorohydrin methyl imidazolium salt graft modified carbon nanotubes

[0036] Step (a): The preparation of acidified carbon nanotubes is the same as step (a) of Example 1.

[0037] Step (b): The preparation of acylated carbon nanotubes is the same as step (b) of Example 1.

[0038] Step (c): replace tetrahydrofuran in step (c) of Example 1 with epichlorohydrin, and keep other processes unchanged to obtain polyepichlorohydrin graft-modified carbon nanotubes.

[0039] Its transmission electron micrograph is shown in Fig. 1a.

[0040] Its thermogravimetric analysis diagram is shown in Fig. 2, and the result shows that the polymer grafting amount is 40%.

[0041]Step (d): Add 0.2 g of polyepichlorohydrin graft-modified carbon nanotubes obtained in step (c) to 30 ml of 95% ethanol, and then add 10 ml of methylimidazole. Adding reflux and electromagnetic stirring for 12 hours, suction ...

Embodiment 3

[0043] Embodiment 3: Preparation of polypropylene oxide graft-modified carbon nanotubes

[0044] Step (a): The preparation of acidified carbon nanotubes is the same as step (a) of Example 1.

[0045] Step (b): The preparation of acylated carbon nanotubes is the same as step (b) of Example 1.

[0046] Step (c): replace tetrahydrofuran in step (c) of Example 1 with propylene oxide, and keep other processes unchanged to obtain the target product polypropylene oxide graft-modified carbon nanotubes. The result of thermogravimetric analysis shows that the polymer grafting amount is about 45%.

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Abstract

The invention discloses carbon nanotubes and the preparation method of the polymer graft modification, which adopts the acyl groups on the surface of the carbon nanotubes to initiate the ring-shaped monomeric compound to carry out cationic ring-opening polymerization reaction and gain the carbon nanotubes of the polymer graft modification. The invention realizes the surface modification of the carbon nanotubes via simple steps and can regulate the hydrophile and lipophilicity of the surface of the carbon nanotubes. The carbon nanotubes of the gained polymer graft modification and the carbon nanotubes of the polymer salt graft modification in different solvent show good solubility and polymer compatibility, thereby can be used as functional additive to improve the performances such as the electricity, magnetics, heat and mechanics of the polymer.

Description

technical field [0001] The invention relates to a polymer-grafted carbon nanotube and a preparation method thereof. Background technique [0002] Since the invention of carbon nanotubes in 1991, carbon nanotubes have attracted widespread attention due to their unique physical and chemical properties. Carbon nanotubes have high strength, high aspect ratio, high specific surface area, high thermal stability, excellent electrical conductivity, excellent thermal conductivity, and a unique one-dimensional tubular structure, so they have broad applications in the field of materials, especially in the field of polymer composites. application prospects. [0003] Since the non-polar surface of carbon nanotubes is both hydrophobic and oleophobic, it is difficult for carbon nanotubes to dissolve in solvents, and the compatibility with the polymer interface is poor, and it is difficult for carbon nanotubes to disperse well in polymers, which cannot meet expectations The effect of enha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C08F292/00
Inventor 何嘉松张志楠张军
Owner INST OF CHEM CHINESE ACAD OF SCI
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