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Carbon nanotube composite material filled with ferrous sulfide, preparation method and application thereof

A technology of carbon nanotubes and composite materials, applied in nanostructure manufacturing, chemical instruments and methods, nanotechnology, etc., can solve the problems of limiting the wide application of carbon nanotube composite materials, cumbersome filling process, and complicated preparation process, and achieve The effect of controllable product characteristics, good controllability and simple process

Inactive Publication Date: 2011-04-13
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most methods have disadvantages such as cumbersome filling process, complex preparation process and low filling rate, which limit the wide-scale application of filled carbon nanotube composites.
The catalysts used in the traditional preparation of carbon nanotubes are generally transition metals such as Fe, Co, Ni, etc. These metal catalysts are often loaded on some carriers, such as magnesium oxide, porous silica, alumina, etc., and the metals are filled into carbon nanotubes. The possibility is very small, especially the use of carbon nanotube composites filled with iron sulfide has not been reported so far

Method used

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  • Carbon nanotube composite material filled with ferrous sulfide, preparation method and application thereof
  • Carbon nanotube composite material filled with ferrous sulfide, preparation method and application thereof
  • Carbon nanotube composite material filled with ferrous sulfide, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0066] device attached figure 1 . Quartz tubes, quartz boats, and stainless steel sheets should be cleaned to keep them clean and prevent side effects due to pollution. The specific preparation process is as follows:

[0067] (1) Cut a commercially purchased stainless steel sheet into any size, soak it in hydrochloric acid for 10 minutes to remove surface impurities, and then wash it with ethanol for use.

[0068] (2) Put the above-mentioned treated stainless steel sheet into the quartz boat, and put them into the quartz tube reaction chamber together.

[0069] (3) Introduce argon gas (flow rate: 200ml / min) into the quartz tube reaction chamber described in step (2) for about 20 minutes to remove the air in the reaction tube, and then raise the temperature of the heating furnace to 1000°C.

[0070] (4) adjust the argon flow rate 1700ml / min in the step (3), and feed hydrogen and adjust its flow rate to 200ml / min, and carbon source dimethyl sulfide is brought into the reaction...

Embodiment 2

[0072] Front step is identical with step 1~3 in concrete embodiment 1, then the argon flow rate in adjusting step (4) is 1100ml / min, and feeds hydrogen and its flow rate is adjusted to 200ml / min, carbon source dimethyl The sulfide is brought into the reaction chamber by the hydrogen gas to react for 30 minutes, and the carbon nanotube composite material can be formed on the stainless steel sheet after the reaction is completed.

[0073] In specific implementation, the flow rate of argon gas, the flow rate of argon gas, the reaction temperature and the length of reaction time can be changed within a certain range, for example, the flow rate of argon gas is between 800~1800ml / min, the flow rate of hydrogen gas is between 100~300ml / min, and the reaction temperature is between The carbon nanotube composite material can be obtained between 950-1200°C and the reaction time is 15-45min.

Embodiment 3

[0075] The carbon nanotube composite material prepared in Example 1 is uniformly dispersed in paraffin wax or epoxy resin at a weight ratio of 1:5, and can be used as a microwave absorbing material. In the embodiment, when the carbon nanotube composite material / paraffin coating thickness is 2 mm, the maximum reflection attenuation reaches 29.58 dB at 14.80 GHz.

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Abstract

The invention relates to a carbon nanotube composite material filled with ferrous sulfide, a preparation method and an application thereof, in particular to a carbon nanotube composite material which is filled with the ferrous sulfide and has the advantages of adjustable electrical conductivity, light weight, good stability and stronger broadband microwave absorbability, a preparation method and an application thereof. The key point of the carbon nanotube composite material filled with the ferrous sulfide is as follows: the cavity of the carbon nanotube is provided with the ferrous sulfide, wherein, the molecular formula of the ferrous sulfide is Fe7S8. In the preparation method of the carbon nanotube composite material filled with the ferrous sulfide, the Fe7S8 in the cavity of the carbon nanotube is filled in situ during the growth process of the carbon nanotube. In the invention, the carbon nanotube composite material is taken as an electromagnetic wave absorbing material and an electromagnetic shielding material; and when in use, the carbon nanotube composite material is uniformly dispersed in paraffin wax or epoxy resin and then coated on the surface of an object requiring for being coated.

Description

technical field [0001] The invention relates to a carbon nanotube composite material filled with iron sulfide, which belongs to the field of inorganic nanocomposite materials; the invention also relates to its preparation method and application in microwave absorption. Background technique [0002] Since the discovery of carbon nanotubes, it has attracted close and extensive attention from scientists all over the world due to its unique structure and excellent properties. For example, its electrical properties, magnetic properties, and mechanical properties have always been research hotspots. In recent years, the successful use of carbon nanotubes in electronic sensors, battery materials, transistors, and nanodevices has prompted people to conduct larger-scale research and preparation. Due to the confinement effect in the nanospace of carbon nanotubes, the substances filled in the cavity of carbon nanotubes will show different properties from those in the macroscopic bulk. ...

Claims

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Application Information

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IPC IPC(8): C09K3/00B82B3/00C09D163/00C09D191/06C09D5/32
Inventor 杜高辉苏庆梅
Owner ZHEJIANG NORMAL UNIVERSITY
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