CN1530320A - Carbon nanometer pipe material and preparing method thereof - Google Patents
Carbon nanometer pipe material and preparing method thereof Download PDFInfo
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- CN1530320A CN1530320A CNA031139299A CN03113929A CN1530320A CN 1530320 A CN1530320 A CN 1530320A CN A031139299 A CNA031139299 A CN A031139299A CN 03113929 A CN03113929 A CN 03113929A CN 1530320 A CN1530320 A CN 1530320A
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Abstract
A carbon nanotube material has multiple carbon nanotubes which are sequentially connected on a same plane, resulting in better contact between nanotubes and high electric and thermal conductivities. Its preparing process is also disclosed.
Description
[technical field]
The invention relates to a kind of carbon nano-tube material and preparation method thereof, particularly about a kind of carbon nano-tube material of a plurality of carbon nanotubes being made predetermined pattern or shape and preparation method thereof.
[background technology]
Carbon nanotube is a kind of new carbon, owing to it has particular structure and peculiar physics, chemical property and potential application prospect is subjected to people's attention.Carbon nanotube is the tubular material that is curled and to be formed by the graphite linings carbon atom, and its diameter is generally several nanometers to tens nanometers, and thickness only is several nanometers, and it and graphite, diamond be allotropic substance each other, generally can divide two kinds of Single Walled Carbon Nanotube and multi-walled carbon nano-tubes.Carbon nanotube is that Japanese scientist Iijima found in 1991, sees also " Helicalmicrotubules of graphitic carbon ", S Iijima, Nature, vol.354, p56 (1991).
Carbon nanotube has three kinds of different curling modes of Armchair, Zigzag and Chiral respectively, and the different carbon nanotubes that curl mode have different electroconductibility, and therefore, carbon nanotube both can show as good metal electroconductibility, also can show as semiconductive.Discover, the electroconductibility of metallic carbon nanotubes can compare favourably with best metallic substance, even it is better, and the carbon nanotube of semiconductive also can compare favourably with best semiconductor material, sees also " Single-Walled Carbon Nanotube Electronics ", IEEETransactions on Nanotechnology, vol.1, No.1 p78-85 (2002), therefore, carbon nanotube can be used as best metal or semiconductor material is applied in the electron device.
In addition, the heat conductivility excellence of carbon nanotube sees also " Unusually High ThermalConductivity of Carbon Nanotubes ", Savas Berber, Young-Kyun Kwon, andDavid Tom á nek, Phys.Rev.Lett.84,4613 (2000) one literary compositions.Therefore, carbon nanotube also can be used as good thermally conductive material.
The preparation method of carbon current nanotube mainly contains three kinds, arc discharge method, laser evaporation method and chemical Vapor deposition process.The carbon nanotube main drawback of arc discharge method and laser evaporation method gained is the carbon nano-tube bundle that product mostly is winding, woollen yarn knitting and chaotic, is difficult to directly use; Chemical Vapor deposition process is to make catalyzer with metal nanoparticle (as iron, cobalt, nickel or its oxide compound), and catalytic pyrolysis carbonaceous gas (as ethene or acetylene) grows carbon nanotube on catalyzer under 650 ℃~1000 ℃ temperature condition.The carbon nanotube that this method is produced is the carbon nano pipe array of arranged vertical, can directly apply to feds or atomic force microscope etc.But the length of this carbon nanotube only reaches micron order, is unfavorable for the application of large-size device.
People such as Brigitte Vigolo deliver a kind of method for preparing macroscopic carbon nano-tube fibre, specifically see also " Macroscopic Fibers and Ribbons of Oriented Carbon Nanotubes ", Science, Vol.290, P1331-1334 (2000) one literary compositions.This method at first is dispersed in carbon nanotube in the surfactant soln, by polymers soln it is condensed into the carbon nanotube mesh fabric then, at last this reticulated is made large-sized carbon nano-tube fibre.
But, the resulting carbon nano-tube fibre resistance of above-mentioned preparation method is very big, substantially be nonmetal character, its reason is that each carbon nanotube does not form good ordered arrangement, even the adjacent carbon nanotube pitch that has is very big, be not in contact with one another at all, thereby can not give full play to the good electric conductivity and the heat conductivility of carbon nanotube.Therefore, provide a kind of ordered arrangement, be in contact with one another good and to have a carbon nano-tube material of larger size range very necessary.
[summary of the invention]
The object of the present invention is to provide a kind of ordered arrangement, be in contact with one another well and have carbon nano-tube material than length.
Another object of the present invention is to provide the preparation method of aforementioned carbon nano-tube material.
The invention provides a kind of carbon nano-tube material, comprise many carbon nanotubes, wherein, each carbon nanotube is arranged at grade, and the adjacent carbons nanotube joins end to end substantially, thereby makes that contact is good between the carbon nanotube.
The preparation method of this carbon nano-tube material comprises the following steps: to provide a vacuum chamber, and a plurality of carbon nanotubes are provided, and wherein an end of each carbon nanotube contains the nano particle of Ferrious material or its oxide compound; In this vacuum chamber, continue to discharge an amount of carbon nanotube, apply a action of a magnetic field simultaneously in this carbon nanotube; In vacuum chamber, one carbon nanotube collection device movably is set at a distance of this carbon nanotube point of release a distance, and orders about this collection device and move along a pre-determined direction along this carbon nanotube direction of motion; Carbon nanotube moves to this collection device, and becomes predetermined pattern or shape along the horizontal ordered arrangement of pre-determined direction.
Compared with prior art, each carbon nanotube of carbon nano-tube material of the present invention is arranged in order, and the contact of adjacent carbons nanotube is good, can give full play to carbon nanotube favorable conductive and thermal conductivity.
[description of drawings]
Fig. 1 is a carbon nano-tube material preparation method schema of the present invention.
Fig. 2 is the carbon nano pipe array synoptic diagram with the chemical Vapor deposition process preparation.
Fig. 3 is the carbon nanotube enlarged view of Fig. 2.
Fig. 4 is preparation method's synoptic diagram of first embodiment of the invention.
Fig. 5 is the synoptic diagram of first embodiment of the invention.
Fig. 6 is the synoptic diagram of second embodiment of the invention.
[embodiment]
Seeing also Fig. 1, is carbon nano-tube material preparation method schema of the present invention.It comprises the following steps:
Below will describe embodiments of the present invention in detail with specific embodiment.
See also Fig. 2 and Fig. 3, be to reach wherein carbon nanotube enlarged view with the carbon nano pipe array synoptic diagram that the CVD method prepares, a plurality of carbon nanotubes 13 of same length are vertically arranged the surface that forming array is formed on substrate 11, wherein vegetative point one end of each carbon nanotube 13 comprises metal nanoparticle 14, this metal nanoparticle 14 is the remaining granules of catalyst of reaction, be generally iron, cobalt, nickel or its oxide compound, its particle diameter diameter general and carbon nanotube 13 is suitable, is 1~50 nanometer.
This carbon nano pipe array taken off carry out pre-treatment and make it to separate, for example, dissolve in the solution that contains tensio-active agent, through ultrasonication and after separating, dry getting final product.
Seeing also Fig. 4, is preparation method's synoptic diagram of first embodiment of the invention.Vacuum chamber 20 inside are provided with a container 30 and a collector 22, and wherein, this collector 22 and container 30 be at a distance of certain distance, and collector 22 can drive and be moved by driving wheel 24, and other has a magnet 26 to place under the collector 22, can produce magnetic field.Container 30 is built-in with a plurality of carbon nanotubes 13 of same length, and this carbon nanotube 13 is through the separated attitude of pre-treatment, and each carbon nanotube 13 1 end contains metal nanoparticle 14, as the ferrous metal nano particle.Discharge certain quantity of carbon nanometer pipe 13, then its gravitate and the movement of falling object, simultaneously, magnet 26 under the collector 22 produces the action of a magnetic field on the metal nanoparticle 14 of this carbon nanotube 13, by the action of a magnetic field, quicken carbon nanotube 13 motions, and adjust carbon nanotube 13 to vertical shape, when carbon nanotube 13 moved to collector 22, an end that contains metal nanoparticle 14 at first landed on the surface of collector 22.Because collector 22 is driven wheel 24 and drives, collector 22 moves along a fixed-direction, and the end that carbon nanotube 13 contains metal nanoparticle 14 lands on collector 22 surfaces, and the other end is toppled over to collector reverse movement direction.Follow-up carbon nanotube 13 repeats this process, be arranged in the surface of collector 22 in the same manner, movement velocity by the release rate and the collector 22 of controlling carbon nanotube 13, it is the spacing of may command adjacent carbons nanotube 13, thereby, select suitable carbon nanotube 13 release rate and the movement velocity of collector 22, adjacent carbons nanotube 13 is joined end to end, keep in touch good.In addition, for keeping the firm combination of carbon nanotube 13, carbon nanotube 13 bondings that can utilize binding agent (not shown) to finish alignment processes are fixed.
Seeing also Fig. 5, is the carbon nano-tube material synoptic diagram of first embodiment of the invention method preparation, and wherein carbon nanotube 13 is arranged in collector 22 surfaces along equidirectional, and adjacent carbons nanotube 13 roughly joins end to end, and keeps well contact.
Seeing also Fig. 6, is the synoptic diagram of second embodiment of the invention.Present embodiment and first each step of embodiment implementation method are roughly the same, difference is that collector 22 is made circumferential motion around its center in the present embodiment, it is circular-arc that the result makes that carbon nanotube 13 is arranged in, and each carbon nanotube 13 still joins end to end, and keeps well contact.
Third embodiment of the invention is with the first embodiment difference, makes collector 22 first moving linearlies, remakes circumferential motion, and carbon nano-tube material with the circular arc combined shaped can obtain being arranged in a straight line.
Fourth embodiment of the invention, be with the first embodiment difference, in carbon nanotube 13 sepn processes, the process of control ultrasonication, make many (as 2~200) carbon nanotubes 13 still be combined into a carbon nano-tube bundle, so a plurality of carbon nano-tube bundles are prepared into the carbon nanotube beam material of predetermined shape or pattern by the step of first embodiment.
Carbon nano-tube material provided by the present invention, wherein each carbon nanotube is arranged in order, and the contact of adjacent carbons nanotube is good, can give full play to carbon nanotube favorable conductive and thermal conductivity, thereby is suitable for preparing carbon nanotube conducting or thermally conductive material or device exploitation.
Carbon nano-tube material of the present invention and preparation method thereof can also have other to change design, for example for adapting to actual needs, the mode of motion that can change collector 22 is straight line, broken line, circumferential motion or its combination, thereby forms the carbon nano-tube material of different spread geometries or pattern; Or with the 13 formation carbon nano-tube bundles releases of many carbon nanotubes, a plurality of carbon nano-tube bundles are arranged and are formed carbon nano-tube material or the like, all belong to the variation that the present invention allows.
Claims (10)
1. a carbon nano-tube material comprises many carbon nanotubes, it is characterized in that these many carbon nanotubes are arranged in on the one side, and the head and the tail of at least one carbon nanotube connects other adjacent carbon nanotube respectively.
2. carbon nano-tube material as claimed in claim 1, it is characterized in that these many carbon nanotubes along same direction parallel arrangement on this plane.
3. carbon nano-tube material as claimed in claim 1 is characterized in that the head and the tail of each carbon nanotube connect other adjacent carbon nanotube respectively.
4. carbon nano-tube material as claimed in claim 3, it is characterized in that these many carbon nanotubes on this plane, arrange form circular.
5. the preparation method of a carbon nano-tube material, it comprises the following steps:
(a) provide a vacuum chamber, and many carbon nanotubes are provided, wherein an end of each carbon nanotube contains the nano particle of Ferrious material or its oxide compound;
(b) in this vacuum chamber, continue to discharge an amount of carbon nanotube, apply a action of a magnetic field simultaneously at this carbon nanotube;
(c) in vacuum chamber, one carbon nanotube collection device movably is set at a distance of this carbon nanotube point of release a distance, and orders about this collection device and do a predetermined motion along this carbon nanotube direction of motion;
(d) carbon nanotube moves to this collection device, and becomes predetermined pattern or shape along the horizontal ordered arrangement of pre-determined direction.
6. the preparation method of carbon nano-tube material as claimed in claim 5, it is characterized in that this step (b) can further comprise the burst size of adjusting carbon nanotube, it is continuous substantially to make that carbon nanotube can satisfy adjacent carbons nanotube head and the tail when being subjected to the action of a magnetic field to move to this collection device.
7. the preparation method of carbon nano-tube material as claimed in claim 5 is characterized in that this Ferrious material comprises iron, cobalt, nickel.
8. the preparation method of carbon nano-tube material as claimed in claim 5 is characterized in that this collection device moves along a straight line.
9. the preparation method of carbon nano-tube material as claimed in claim 5 is characterized in that this collection device riding.
10. the preparation method of carbon nano-tube material as claimed in claim 5 is characterized in that this method comprises that further the carbon nanotube bonding of utilizing binding agent will finish alignment processes is fixing.
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CNA031139299A CN1530320A (en) | 2003-03-13 | 2003-03-13 | Carbon nanometer pipe material and preparing method thereof |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7872408B2 (en) | 2007-05-11 | 2011-01-18 | Tsinghua University | Field-emission-based flat light source |
CN101290857B (en) * | 2007-04-20 | 2011-06-22 | 清华大学 | Field emitted cathode and preparing method thereof |
CN102394204A (en) * | 2008-03-19 | 2012-03-28 | 清华大学 | Field electron emission source |
CN101540251B (en) * | 2008-03-19 | 2012-03-28 | 清华大学 | Field-emission electron source |
JP7442565B2 (en) | 2017-11-17 | 2024-03-04 | リンテック・オブ・アメリカ・インコーポレイテッド | Carbon nanotube artificial muscle valve and connection |
US12011347B2 (en) | 2017-10-26 | 2024-06-18 | Lintec Of America, Inc. | Carbon nanotube sheet wrapping muscles |
-
2003
- 2003-03-13 CN CNA031139299A patent/CN1530320A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101290857B (en) * | 2007-04-20 | 2011-06-22 | 清华大学 | Field emitted cathode and preparing method thereof |
US7872408B2 (en) | 2007-05-11 | 2011-01-18 | Tsinghua University | Field-emission-based flat light source |
CN102394204A (en) * | 2008-03-19 | 2012-03-28 | 清华大学 | Field electron emission source |
CN101540251B (en) * | 2008-03-19 | 2012-03-28 | 清华大学 | Field-emission electron source |
CN102394204B (en) * | 2008-03-19 | 2014-10-08 | 清华大学 | Field electron emission source |
US12011347B2 (en) | 2017-10-26 | 2024-06-18 | Lintec Of America, Inc. | Carbon nanotube sheet wrapping muscles |
JP7442565B2 (en) | 2017-11-17 | 2024-03-04 | リンテック・オブ・アメリカ・インコーポレイテッド | Carbon nanotube artificial muscle valve and connection |
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