CN101857219A - Method for preparing carbon nanotubes - Google Patents
Method for preparing carbon nanotubes Download PDFInfo
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- CN101857219A CN101857219A CN201010209227A CN201010209227A CN101857219A CN 101857219 A CN101857219 A CN 101857219A CN 201010209227 A CN201010209227 A CN 201010209227A CN 201010209227 A CN201010209227 A CN 201010209227A CN 101857219 A CN101857219 A CN 101857219A
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- carbon nanotube
- vacuum tank
- carbon nanotubes
- nanocatalyst
- vacuum groove
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Abstract
The invention relates to a method for preparing carbon nanotubes. The method is mainly used for preparing the carbon nanotubes and comprises the following steps of: distributing a nano-catalyst on the top and lateral part of a vacuum groove; controlling the temperature and the pressure of the vacuum groove; allowing C2H2 serving as a raw material to enter the vacuum groove at a certain flow rate to perform decomposition to produce the carbon nanotubes under the action of the nano-catalyst; when the reaction time reaches a set value, cooling the vacuum groove with purified air until the temperature is decreased to 30 to 45 DEG C; taking the produced carbon nanotubes out of the bottom of the vacuum groove and feeding the carbon nanotubes into a collector; and discharging the reaction exhaust from a door of the vacuum groove to prepare the carbon nanotubes of which the tube diameter is uniform, the shape is regular, the purity is over 96 percent, the external diameter is 1 to 3nm, the internal diameter is 0.8 to 1.7nm, the length is 6 to 30mu m, the specific surface area is more than 385m<2>/g, the actual density is more than or equal to 2.16g/cm<3> and the conductivity is more than 120s/cm. The preparation method has the main advantages of mature technology, simple and convenient operation and capability of preparing high-quality carbon nanotubes.
Description
One, technical field:
The invention belongs to a kind of preparation method of chemical field, be mainly used in a kind of preparation of carbon nanotube.
Two, background technology:
Carbon nanotube is a kind of high strength carbon cellulosic material, this material has outstanding electricity, optics, conduction, thermal conduction characteristic, can be widely used in the fields such as electrode materials, illumination, an emissive display, molecular device, conductive material of absorbing material, antistatic coating, coating for EMI shielding, conductive and heat-conductive plastics, lithium ion battery.Domestic carbon current nanotube also is in development, and the main at present dependence import of domestic carbon nanotube is badly in need of wanting a kind of preparation method of carbon nano-tube of mature and reliable to come out, and to produce high-quality carbon nanotube, meets the need of market.
Three, summary of the invention:
The preparation method who the purpose of this invention is to provide a kind of carbon nanotube, produce high-performance, carbon nanotube cheaply, the raw material of super quality and competitive price is provided for the industries such as electrode materials of absorbing material, antistatic coating, coating for EMI shielding, conductive and heat-conductive plastics, lithium ion battery.
This preparation method adopts C
2H
2As raw material, the employing nanocatalyst is distributed in the top and the sidepiece of vacuum tank, temperature, the pressure of control vacuum tank, C
2H
2Enter vacuum tank and under the effect of nanocatalyst, decompose the generation carbon nanotube with certain flow, when the reaction times reaches set(ting)value, with purifying good air vacuum tank is lowered the temperature, when being cooled to 30-45 ℃, the carbon nanotube that generates is deviate to enter collector from the vacuum tank bottom, and reaction end gas is discharged by vacuum tank groove door.The carbon nanotube caliber that makes is neat, regular shape, purity＞96%, external diameter 1-3nm, internal diameter 0.8-1.7nm, length 6-30um, specific surface area＞385m
2/ g, real density 〉=2.16g/cm
3, electric conductivity＞120s/cm.
Described nanocatalyst is a nanometer Fe
2O
3/ ZnO-TiO
2
Described nanocatalyst is arranged by concentric circles, by this kind distribution sequence, makes C
2H
2Grow into carbon nanotube by the ladder order in the feeding process, the carbon nanotube caliber that makes is neat, regular shape.
The main beneficial effect of present method is by adopting the nanocatalyst nanometer Fe
2O
3/ ZnO-TiO
2, simultaneously nanocatalyst is arranged in a certain order, makes unstripped gas C
2H
2Resolve into carbon nanotube thereon, the carbon nanotube caliber of gained is neat, regular shape.Carbon nanotube length drop to the vacuum tank bottom under the effect of gravity behind certain size.
Four, embodiment:
This preparation method is specific as follows: adopt C
2H
2As raw material, after removing impurity, squeezes into clearing machine in the gas tank, guarantee that gas tank pressure is in the 0.5-0.65MPa scope.Adopt nanocatalyst to arrange in certain sequence, be distributed in the top and the sidepiece of vacuum tank, the temperature of control vacuum tank is in 1000-1200 ℃ of scope, and the groove internal pressure is lower than 0.0001Pa, opens the gas tank valve of giving vent to anger, C
2H
2With 2m
3The flow of/s enters vacuum tank and decomposes under the effect of nanocatalyst and generates carbon nanotube, carbon nanotube falls into the vacuum tank bottom, when the reaction times reaches set(ting)value, close give vent to anger valve and vacuum tank is lowered the temperature of gas tank with the air of purify getting well, when vacuum tank temperature during to 30-45 ℃, open vacuum tank groove door, the carbon nanotube that generates is deviate to enter collector from the vacuum tank bottom, reaction end gas is discharged by vacuum tank groove door, with the carbon nanotube product that makes after testing after, with the vacuum-packed warehouse-in of fiber can.
Preparation method's main technique condition of a kind of carbon nanotube of the present invention sees Table one
| Sequence number | Gas tank pressure (MPa) | The temperature of vacuum tank (℃) | Vacuum tank pressure (Pa) | ??C 2H 2Flow (m 3/s) | Nanocatalyst |
| ??1 | ??0.5-0.65 | ??1000-1200 | ??＜0.0001 | ??2 | ??Fe 2O 3/Zn0-TiO 2 |
The technical indicator contrast table of carbon nanotube of the present invention and common carbon nanotube sees Table two
Claims (3)
1. the preparation method of a carbon nanotube is mainly by C
2H
2Be raw material, adopt nanocatalyst, temperature, the pressure of control vacuum tank, C
2H
2Decompose the generation carbon nanotube under the effect of nanocatalyst, adopt the vacuum tank cooling afterwards, carbon nanotube is collected, and technologies such as detection, packing, warehouse-in are formed, and it is characterized in that: adopt C
2H
2As raw material, the employing nanocatalyst is distributed in the top and the sidepiece of vacuum tank, temperature, the pressure of control vacuum tank, C
2H
2Enter vacuum tank and under the effect of nanocatalyst, decompose the generation carbon nanotube with certain flow, when the reaction times reaches set(ting)value, vacuum tank is lowered the temperature with purifying good air, when being cooled to 30-45 ℃, the carbon nanotube that generates is deviate to enter collector from the vacuum tank bottom, and reaction end gas is discharged by vacuum tank groove door, and the carbon nanotube caliber that makes is neat, regular shape, purity＞96%, external diameter 1-3nm, internal diameter 0.8-1.7nm, length 6-30um, specific surface area＞385m
2/ g, real density 〉=2.16g/cm
3, electric conductivity＞120s/cm.
2. the preparation method of a kind of carbon nanotube according to claim 1, it is characterized in that: described nanocatalyst is a nanometer Fe
2O
3/ ZnO-TiO
2
3. according to the preparation method of claim 1,2 described a kind of carbon nanotubes, it is characterized in that: described nanocatalyst is arranged by concentric circles, by this kind distribution sequence, makes C
2H
2Grow into carbon nanotube by the ladder order in the feeding process, the carbon nanotube caliber that makes is neat, regular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010209227A CN101857219A (en) | 2010-06-11 | 2010-06-11 | Method for preparing carbon nanotubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010209227A CN101857219A (en) | 2010-06-11 | 2010-06-11 | Method for preparing carbon nanotubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101857219A true CN101857219A (en) | 2010-10-13 |
Family
ID=42943416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010209227A Pending CN101857219A (en) | 2010-06-11 | 2010-06-11 | Method for preparing carbon nanotubes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101857219A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103013441A (en) * | 2013-01-10 | 2013-04-03 | 贵州大学 | Method for growing low helical carbon nanotube composite microwave absorbing material by in-situ catalysis |
| CN109610159A (en) * | 2018-12-20 | 2019-04-12 | 山东大学 | A kind of preparation method growing carbon nanotube in carbon fibre fabric surface catalysis using bimetallic catalyst |
-
2010
- 2010-06-11 CN CN201010209227A patent/CN101857219A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103013441A (en) * | 2013-01-10 | 2013-04-03 | 贵州大学 | Method for growing low helical carbon nanotube composite microwave absorbing material by in-situ catalysis |
| CN103013441B (en) * | 2013-01-10 | 2014-03-19 | 贵州大学 | Method for growing low helical carbon nanotube composite microwave absorbing material by in-situ catalysis |
| CN109610159A (en) * | 2018-12-20 | 2019-04-12 | 山东大学 | A kind of preparation method growing carbon nanotube in carbon fibre fabric surface catalysis using bimetallic catalyst |
| CN109610159B (en) * | 2018-12-20 | 2020-03-20 | 山东大学 | Preparation method for catalytic growth of carbon nanotubes on surface of carbon fiber fabric by using bimetallic catalyst |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20101013 |