Modified carbon nano tube and preparation method thereof

A technology of carbon nanotubes and nanotubes, applied in the field of modified carbon nanotubes and its preparation, can solve the problems of destroying the structure of carbon nanotubes, lowering the thermal decomposition temperature, and having no active groups in modified carbon nanotubes, and achieving high electrical conductivity rate, reducing the effect of silanol content

Inactive Publication Date: 2013-01-16
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method treats carbon nanotubes in air at high temperature (590°C) for 3 hours. Such treatment conditions will inevitably destroy the structure of carbon nanotubes, which is not conducive to maintaining the original performance advantages of carbon nanotubes.
In addition, the modified carbon nanotubes have no active groups, and the thermal decomposition temperature is reduced (there is obvious weight loss at 240°C)
[0006] It can be seen from the above prior art that although the current modified carbon nanotube preparation technology has achieved the purpose of modification in some respects, it inevitably destroys the structure of carbon nanotubes, which is not conducive to maintaining the original properties of carbon nanotubes. performance advantage

Method used

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  • Modified carbon nano tube and preparation method thereof
  • Modified carbon nano tube and preparation method thereof
  • Modified carbon nano tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Preparation of hyperbranched polyaniline

[0038] 0.9g aniline, 1.1g o-toluidine and 1.7g m-aminobenzenesulfonic acid were mixed respectively, and 150mL hydrochloric acid solution (0.2mol / L) was added in the mixture; 2 Under protection and at 0-5°C, mechanically stir for 30 minutes. Subsequently, 100 mL of ammonium persulfate (0.3 mol / L) solution was added dropwise and vigorously stirred. After the dropwise addition, keep warm for 5 hours until the reaction is over, wash with dilute hydrochloric acid solution, acetone, deionized water, filter with suction, and vacuum dry at 50°C for 24 hours to obtain polyaniline with an intrinsic viscosity of 0.43dL / g. Its infrared spectrum, ultraviolet-visible spectrum, 1 H nuclear magnetic resonance spectrum, scanning electron microscope, X-ray diffraction spectrum, conductivity curve and thermogravimetric curve are respectively as attached figure 1 , 2 , 3, 4, 5, 6 and 7.

[0039] Get 30mL dehydrated alcohol as solvent, add ...

Embodiment 2

[0057] 1. Preparation of hyperbranched polyaniline

[0058] Prepare hyperbranched polyaniline according to embodiment 1 technical scheme.

[0059] 2. Preparation of modified carbon nanotubes

[0060] Add 1g of carbon nanotubes and 0.05g of hyperbranched polyaniline into 50mL of dimethyl sulfoxide, stir at 25°C and sonicate for 20 minutes, add 100mL of methanol to precipitate, filter and wash, and dry in vacuum at 50°C for 24 hours , to obtain modified carbon nanotubes. Its X-ray diffraction spectrum and Raman spectrum are as follows Figure 9 and 10 shown.

Embodiment 3

[0062] 1. Preparation of hyperbranched polyaniline

[0063] Prepare hyperbranched polyaniline according to embodiment 1 technical scheme.

[0064] 2. Preparation of modified carbon nanotubes

[0065] Add 1g of carbon nanotubes and 0.1g of hyperbranched polyaniline into 50mL of dimethyl sulfoxide, stir at 25°C and sonicate for 20min, add 100mL of methanol to precipitate, filter and wash, and dry in vacuum at 50°C for 24 hours , to obtain modified carbon nanotubes. Its X-ray diffraction spectrum, Raman spectrum and conductivity are as follows Figure 9 , 10 and 11.

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Abstract

The invention discloses a modified carbon nano tube and a preparation method thereof. The method comprises the following steps of: dissolving polyaniline in dimethyl sulfoxide; dripping hyperbranched polysiloxane which is subjected to blocking treatment and contains epoxy groups, and hydrochloric acid to obtain hyperbranched polyaniline; adding hyperbranched polyaniline and a carbon nano tube into dimethyl sulfoxide; precipitating in methanol; and performing suction filtration and washing to obtain the modified carbon nano tube, wherein a hyperbranched polyaniline conducting layer is coated on the surface of the carbon nano tube, and the electric conductivity of the modified carbon nano tube can be controlled by adjusting the content of the coating layer, so that a conductive and dielectric material which has high dielectric constant and low dielectric loss can be prepared, and the performance of the material can be controlled possibly. The hyperbranched polysiloxane contains epoxy groups, hydroxyl and other active groups, so good basis is founded for compounding of the modified carbon nano tube and resin, and the research and the development of novel functional materials. The provided modified carbon nano tube also has the characteristics that the preparation method is high in applicability, and an operation process is simple.

Description

technical field [0001] The invention relates to a modified carbon nanotube and a preparation method thereof. Background technique [0002] Carbon nanotubes, also known as bucky tubes, are one-dimensional quantum materials with unique structures. Due to its unique electronic structure and physical and chemical properties, the application of carbon nanotubes in many fields has attracted widespread attention of scientists from all over the world. Among them, the composite of carbon nanotubes and polymers has become an important application form of carbon nanotubes. So far, scholars at home and abroad have carried out a lot of research and development work, and the results show that the effective dispersion of carbon nanotubes in polymers is the premise and guarantee for the excellent comprehensive performance of carbon nanotubes / polymer composites. However, the nature of carbon nanotubes and polymers determines that it is difficult for carbon nanotubes to obtain good dispersi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K7/00C08K3/04C08G81/00C08G73/02C09C1/44C09C3/12
Inventor 梁国正强志翔顾嫒娟张志勇袁莉
Owner SUZHOU UNIV
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