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Carbon nano-tube modified by in-situ polymerization based on plasma initiation and preparation method thereof

A technology of carbon nanotubes and plasma, which is applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems of easy aggregation, high surface energy of carbon nanotubes, and restrictions on the application of carbon nanotubes, and achieve high efficiency , The method is simple and practical

Inactive Publication Date: 2009-10-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface energy of carbon nanotubes is extremely high, and the huge van der Waals force between the tubes makes them easy to aggregate into bundles, and they are almost insoluble in any solvent, which greatly limits the application of carbon nanotubes.

Method used

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  • Carbon nano-tube modified by in-situ polymerization based on plasma initiation and preparation method thereof
  • Carbon nano-tube modified by in-situ polymerization based on plasma initiation and preparation method thereof
  • Carbon nano-tube modified by in-situ polymerization based on plasma initiation and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0022] Take 100mg mixed strong acid (V 浓H2SO4 :V 浓HNO3 =3: 1) carbon nanotubes after oxidation (multi-walled carbon nanotubes, d=10~50nm, l=1~50μm, Beijing Nachen Co., Ltd., the same below) were treated with 14W of discharge power and Ar plasma for 5min, Then add 5g of acrylic acid monomer and 15g of deionized water into a three-necked flask, protect with Ar, stir, heat up to 41°C for 3h, collect the product, wash with acetone or ethanol for 3 times, and wash the product at room temperature under vacuum Dry for 3 hours to obtain polypropionic acid-modified carbon nanotubes. Thermogravimetric analysis found that functional groups grafted onto the surface of carbon nanotubes accounted for 26.5% of the total. Raman spectroscopy indicated that polyacrylic acid was attached to carbon nanotubes.

[0023] figure 1 Thermal weight loss diagram of polyacrylic acid modified carbon nanotubes, a-MWCNTs after strong acid oxidation, b-PAA modified MWCNTs, c-PAA. figure 2 Dispersion dia...

example 2

[0025] Take 100mg of carbon nanotubes oxidized by mixed strong acid and treat them with Ar plasma at a discharge power of 14W for 5min, then add them together with 5g of acrylic acid monomer and 15g of deionized water into a three-necked flask, protect with Ar, stir, and heat up to 51°C for reaction After 3 hours, the product was collected, washed three times with acetone or ethanol, and the washed product was dried under vacuum at room temperature for 3 hours to obtain polyacrylic acid-modified carbon nanotubes. Thermogravimetric analysis found that functional groups grafted onto the surface of carbon nanotubes accounted for 71.5% of the total. Raman spectroscopy indicated that polyacrylic acid was attached to carbon nanotubes.

example 3

[0027] Take 100mg of carbon nanotubes oxidized by a mixed strong acid and treat them with Ar plasma at a discharge power of 14W for 5 minutes, then add them together with 5g of acrylic acid monomer and 15g of deionized water into a three-necked flask, protect them with Ar, stir, and heat up to 41°C for reaction After 4 hours, the product was collected, washed three times with acetone or ethanol, and the washed product was dried under vacuum at room temperature for 3 hours to obtain polyacrylic acid-modified carbon nanotubes. Thermogravimetric analysis found that functional groups grafted onto the surface of carbon nanotubes accounted for 41.3% of the total. Raman spectroscopy indicated that polyacrylic acid was attached to carbon nanotubes.

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Abstract

The invention provides a method for preparing a carbon nano-tube modified in-situ polymerization based on plasma initiation. The method takes a carbon nano-tube and acrylic acid, styrene or acrylamide monomers as raw materials for functional polymerization reaction preparation, and functional groups grafted to the surface of the carbon nano-tube accounts for 12 to 72 percent of the total amount. The obtained carbon nano-tube subjected to in-situ polymerization has good solubility and compatibility, can conveniently react with other compounds, and can be conveniently combined with other high polymers to prepare nano composite materials so as to have wide application prospect. The method is simple and practical, has high efficiency and mild reaction conditions, and does not need complex testing apparatuses.

Description

technical field [0001] The invention relates to a plasma-induced in-situ polymerization modified carbon nanotube and a preparation method thereof. Background technique [0002] Carbon nanotubes have attracted great interest since their discovery due to their unique physical and chemical properties. However, the surface energy of carbon nanotubes is extremely high, and the huge van der Waals force between the tubes makes them easy to aggregate into bundles, and they are almost insoluble in any solvent, which greatly limits the application of carbon nanotubes. In order to overcome the van der Waals interaction between carbon nanotubes, improve the dispersion performance of carbon nanotubes in solvents, or enhance the interaction between carbon nanotubes and other materials, it is an important method to modify the surface of carbon nanotubes. method. [0003] The surface modification methods of carbon nanotubes mainly include chemical modification of small molecules such as o...

Claims

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Application Information

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IPC IPC(8): C01B31/00C01B31/02B82B3/00
Inventor 赵乃勤罗太安师春生杜希文盛京
Owner TIANJIN UNIV
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