A kind of surface modification method of carbon nanotube

A carbon nanotube and surface modification technology, applied in the field of nanometers, can solve the problems of large molecular weight of tannic acid structure and complicated process, etc., and achieve the effect of easy control of process parameters, simple process and reduced impurities

Active Publication Date: 2016-03-23
CHENGDU TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, grafted tannic acid (C 76 h 52 o 46 ) Due to the complex structure and large molecular weight, the surface of carbon nanotubes introduces more C, H, O impurity elements
At the same time, the process needs to be pretreated first, and the process is cumbersome.

Method used

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  • A kind of surface modification method of carbon nanotube
  • A kind of surface modification method of carbon nanotube
  • A kind of surface modification method of carbon nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add multi-walled carbon nanotubes to 10 μg / ml gallic acid aqueous solution, and disperse evenly, wherein the ratio of the weight of carbon nanotubes to the volume of gallic acid aqueous solution is 0.1g: 40ml; let stand for 24h, filter, and take the filter residue at 60 and dried under vacuum for 2 h at °C to obtain surface-modified carbon nanotubes.

[0032] figure 1 Low magnification (×10000) SEM images of carbon nanotubes (CNTs) before and after treatment with aqueous gallic acid: a. SEM image without gallic acid aqueous solution treatment; b. SEM image after gallic acid aqueous solution treatment. figure 2 High magnification (×50000) SEM images of carbon nanotubes (CNTs) before and after treatment with gallic acid aqueous solution: a. SEM image without gallic acid aqueous solution treatment; b. SEM image after gallic acid aqueous solution treatment. from figure 1 with 2 It can be seen that the carbon nanotubes without gallic acid aqueous solution are agglomerate...

Embodiment 2

[0036] Add single-walled carbon nanotubes to 3 μg / ml gallic acid aqueous solution, and disperse evenly, wherein the ratio of the weight of carbon nanotubes to the volume of gallic acid aqueous solution is 0.5g: 60ml; let stand for 12h, filter, and take the filter residue at 70 and dried under vacuum for 1 h at °C to obtain surface-modified carbon nanotubes.

[0037] Disperse 0.1 g of the surface-modified carbon nanotubes prepared in this example evenly in 100 ml of deionized water. After standing for 3 days, the precipitation gradually increased under the action of gravity, but the carbon nanotubes remained dispersed and did not agglomerate. . It shows that the surface-modified carbon nanotubes prepared in Example 2 have excellent dispersibility.

Embodiment 3

[0039] Add multi-walled carbon nanotubes to 18 μg / ml gallic acid aqueous solution, and disperse evenly, wherein the ratio of the weight of carbon nanotubes to the volume of gallic acid aqueous solution is 0.05g: 20ml; let stand for 30h, filter, and take the filter residue at 80 and dried under vacuum for 3 h at °C to obtain surface-modified carbon nanotubes.

[0040] Disperse 0.1 g of the surface-modified carbon nanotubes prepared in this example evenly in 100 ml of deionized water. After standing for 2 days, the precipitation gradually increased under the action of gravity, but the carbon nanotubes remained dispersed and did not agglomerate. . It shows that the surface-modified carbon nanotubes prepared in Example 2 have excellent dispersibility.

[0041] From Examples 1 to 3, it can be seen that the surface-modified carbon nanotubes prepared in Example 1 gradually precipitated under the action of gravity after standing for 5 days, and the carbon nanotubes were still in a we...

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Abstract

The invention discloses a surface modification method of carbon nanotubes. The modification method comprises the following steps: adding carbon nanotubes into a gallic acid water solution, dispersing uniformly, standing, filtering, taking the filtration residue, and carrying out vacuum drying to obtain the surface-modified carbon nanotubes. The carbon nanotubes obtained by the method have the advantages of favorable dispersity and low impurity content. The method can not cause chemical damage to the carbon nanotubes, maintains the completeness of the carbon nanotubes, does not generate wastewater, waste acid or other pollutants, has the advantages of simple technique and controllable technological parameters, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of nanotechnology, in particular to a surface modification method of carbon nanotubes. Background technique [0002] Carbon nanotubes are hollow tubular fiber structures with a diameter of several nanometers to tens of nanometers and a length of several micrometers or even millimeters. The unique structure of carbon nanotubes determines that it not only has the inherent nature of carbon materials, but also has the electrical and thermal conductivity of metal materials, the heat resistance and corrosion resistance of ceramic materials, the weavability of textile fibers and the lightness of polymer materials. Quality and ease of processing. Due to the above-mentioned excellent properties of carbon nanotubes, they can be used in the manufacture of supercapacitors in the fields of automobiles, machinery, electronics, military and other fields, and can be combined with various metals, non-metals and polymer materials to f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y30/00
Inventor 邵甄胰蒋小松蒋佳芯李景瑞刘晚霞朱德贵刘丹
Owner CHENGDU TECH UNIV
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