Method for preparing three-dimensional macro carbon nanometer pipe network

A carbon nanotube, three-dimensional technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve the problems of limiting the application of carbon nanotube materials, the electrical conductivity and mechanical properties cannot be exerted, and achieve good application prospects, The effect of improved electrical conductivity and mechanical properties, and firm connection

Inactive Publication Date: 2010-09-22
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although carbon nanotubes have a wide range of application prospects, under general conditions, the prepared carbon nanotubes are in the form of powder under macroscopic conditions, and the tube-to-tube connection of carbon nanotubes is only contact conduction without chemical bonds. As a result, the excellent electrical conductivity and mechanical properties of carbon nanotubes cannot be exerted on macroscopic carbon nanotube materials, which greatly limits the further application of carbon nanotube materials

Method used

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  • Method for preparing three-dimensional macro carbon nanometer pipe network
  • Method for preparing three-dimensional macro carbon nanometer pipe network
  • Method for preparing three-dimensional macro carbon nanometer pipe network

Examples

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specific Embodiment approach

[0030] A specific embodiment of the present invention is: a method for preparing a three-dimensional macroscopic carbon nanotube network, the method of which is:

[0031] A. Purify the carbon nanotube powder with sulfuric acid, then ultrasonically disperse, filter under pressure, and dry in vacuum to obtain a carbon nanotube network precursor;

[0032] B. The carbon nanotube network precursor supports the catalyst for connection. In this example, ferric nitrate is used as the catalyst, and the carbon nanotube network precursor is immersed in the ferric nitrate solution, so that the carbon nanotube network precursor is completely infiltrated, and then the carbon nanotube network precursor can be loaded with the catalyst iron nitrate for connection.

[0033] C. Place the catalyst-loaded carbon nanotube network precursor in the quartz tube of the tubular resistance furnace. During the heating process, pass argon gas into the quartz tube to discharge the air in the tube; change th...

Embodiment 2

[0035] The method of this example is basically the same as that of Example 1, the difference is only:

[0036] The catalyst loaded in step B for connection is a mixture of iron nitrate and nickel nitrate (mass ratio 1:1).

[0037] In the C step, the temperature of feeding hydrogen is 950°C, the holding time is 150min, the temperature during heat treatment reaction is 900°C, what is feeding is natural gas, and the reaction (holding time) time is 150min.

Embodiment 3

[0039] The approach in this example is:

[0040] A. Purifying the carbon nanotube powder with nitric acid, then ultrasonically dispersing, filtering at normal pressure, and vacuum drying to obtain a carbon nanotube network precursor;

[0041] B. The carbon nanotube network precursor supports the catalyst for connection. This example catalyst selects nickel, adopts the electrochemical deposition method to load catalyst metal nickel, and its specific parameters are: the carbon nanotube network precursor is used as the working electrode, with a constant potential of 2.05V in the plating solution (every 50mL solution contains: nickel sulfate 15.00 g, nickel chloride 2.00g, boric acid 2.00g, sodium lauryl sulfate 0.05g, sodium saccharin 0.02g), carry out DC electrochemical deposition for 5min (minutes), then rinse with secondary deionized water and keep warm at 100°C 30min, that is, metal nickel is deposited on the carbon nanotube network precursor.

[0042] C. Place the catalyst...

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Abstract

The invention provides a method for preparing a three-dimensional macro carbon nanometer pipe network. The method comprises the following steps of: preparing a precursor of the carbon nanometer pipe network by purification and filtration treatments; loading a catalyst used for connection; making external carbon atoms form a chemical bond connection on contact points among carbon nanometer pipes at the high temperature and under an inducing action of the catalyst so as to realize the connection among the carbon nanometer pipes in a mode of chemical bonds; and finally obtaining the three-dimensional macro carbon nanometer pipe network with the chemical bond connection. The carbon nanometer pipes of the three-dimensional macro carbon nanometer pipe network are connected by chemical bonds, so that the whole carbon nanometer pipe network has high conductive property and mechanical property.

Description

technical field [0001] The invention relates to a preparation method of carbon nanotube material. Background technique [0002] Since the Japanese scientist lijima first discovered carbon nanotubes in 1991, with their unique physical and chemical properties and quasi-one-dimensional molecular structure, they have quickly become a research hotspot in the interdisciplinary fields of physics, chemistry and material science, and have become more and more popular in scientific research and industrial applications. has received more and more people's attention. [0003] The preparation of carbon nanotubes mainly includes the following methods: graphite arc method, catalytic cracking method, laser evaporation method, etc. Originally prepared carbon nanotubes often show agglomeration phenomenon, and the tubes are intertwined and interlaced with each other. In this case, it is often difficult for the material as a whole to show the excellent stability, mechanical properties, and ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 江奇卢晓英赵勇
Owner SOUTHWEST JIAOTONG UNIV
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