WO2015072370A1 - 炭素繊維膜 - Google Patents
炭素繊維膜 Download PDFInfo
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- WO2015072370A1 WO2015072370A1 PCT/JP2014/079219 JP2014079219W WO2015072370A1 WO 2015072370 A1 WO2015072370 A1 WO 2015072370A1 JP 2014079219 W JP2014079219 W JP 2014079219W WO 2015072370 A1 WO2015072370 A1 WO 2015072370A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/159—Carbon nanotubes single-walled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/34—Length
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/70—Nanostructure
- Y10S977/734—Fullerenes, i.e. graphene-based structures, such as nanohorns, nanococoons, nanoscrolls or fullerene-like structures, e.g. WS2 or MoS2 chalcogenide nanotubes, planar C3N4, etc.
- Y10S977/742—Carbon nanotubes, CNTs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/902—Specified use of nanostructure
- Y10S977/932—Specified use of nanostructure for electronic or optoelectronic application
Definitions
- the present invention relates to a carbon fiber film used for a polarizable electrode such as an electric double layer capacitor.
- carbon nanotubes have a larger specific surface area than activated carbon, use of carbon nanotubes as polarizable electrodes such as electric double layer capacitors as a carbon fiber film has been studied. On the other hand, carbon nanotubes are expensive, and an increase in the manufacturing cost of polarizable electrodes such as electric double layer capacitors is inevitable with carbon nanotubes alone.
- the conventional carbon fiber film has a disadvantage that the electric capacity per mass cannot be sufficiently increased.
- An object of the present invention is to provide a carbon fiber membrane that eliminates such inconveniences and that is inexpensive and can sufficiently increase the electric capacity per mass.
- the carbon fiber membrane of the present invention is a carbon fiber membrane consisting only of carbon nanotubes and a carbon material other than carbon nanotubes, and the total amount of carbon nanotubes having a fiber length in the range of 30 to 500 ⁇ m. In an amount in the range of 3% by mass or more and less than 100% by mass.
- the carbon fiber membrane of the present invention contains carbon nanotubes having a fiber length in the range of 30 to 500 ⁇ m in an amount in the range of 3% by mass or more and less than 100% by mass of the total amount of carbon nanotubes and carbon materials other than carbon nanotubes.
- the film can be formed without any binder. If the carbon nanotube fiber length is less than 30 ⁇ m, or the carbon nanotube fiber length is 30 ⁇ m or more, the carbon fiber membrane cannot be formed when the amount of the carbon nanotube is less than 3% by mass of the total amount. .
- the carbon fiber membrane can be formed only by carbon nanotubes having a fiber length in the above range (including carbon nanotubes having a fiber length in the above range with respect to the total amount), but in this case, the manufacturing cost is increased. Is inevitable. Therefore, the carbon fiber membrane of the first aspect of the present invention needs to contain carbon nanotubes having a fiber length in the above range in an amount in the range of 3% by mass to less than 100% by mass of the total amount.
- the carbon fiber membrane of the present invention consists only of carbon nanotubes and carbon materials other than carbon nanotubes, and does not contain a binder, so that the electric capacity per mass can be sufficiently increased.
- the carbon fiber membrane of the present invention includes a carbon nanotube and a cheaper carbon material other than the carbon nanotube, the carbon fiber membrane can be manufactured at a lower cost as compared with the case of only the carbon nanotube.
- the carbon fiber membrane of the present invention preferably contains carbon nanotubes having a fiber length in the above range in a range of 3 to 50% by mass of the total amount in order to manufacture at a lower cost as compared with the case where the carbon fiber membrane is composed only of carbon nanotubes. .
- any one of carbon black and activated carbon can be used as the carbon material other than the carbon nanotube.
- the carbon nanotube includes a first carbon nanotube having an average fiber length in the range of 10 to 50 ⁇ m and a second carbon having an average fiber length in the range of 100 to 250 ⁇ m. It is preferable to consist of a nanotube.
- the carbon fiber membrane of the present invention is compared with the case where only one type of carbon nanotube having a fiber length in the range of 30 to 500 ⁇ m is used because the carbon nanotube is composed of the first carbon nanotube and the second carbon nanotube. If the total amount of carbon nanotubes is the same, a better tensile strength can be obtained.
- the amount of the first carbon nanotube is in the range of 2 to 15% by mass of the total amount.
- the second carbon nanotubes may be included in an amount ranging from 1 to 5% by mass of the total amount, and the carbon material other than the carbon nanotubes may be included in an amount ranging from 80 to 97% by mass.
- the carbon nanotubes can be composed of, for example, first carbon nanotubes having an average fiber length of 30 ⁇ m and second carbon nanotubes having an average fiber length of 125 ⁇ m.
- carbon black when the carbon nanotube is composed of the first carbon nanotube and the second carbon nanotube, carbon black can be used as a carbon material other than the carbon nanotube.
- the graph which shows frequency distribution of the fiber length of the 1st carbon nanotube used for the carbon fiber membrane of this invention The graph which shows frequency distribution of the fiber length of the 2nd carbon nanotube used for the carbon fiber membrane of this invention.
- the carbon fiber membrane according to the first aspect of the present embodiment is a carbon fiber membrane composed only of carbon nanotubes and a carbon material other than carbon nanotubes, and a total of 3 carbon nanotubes having a fiber length in the range of 30 ⁇ m to 500 ⁇ m. It is necessary to contain in the quantity of the range of more than mass% and less than 100 mass%. If the carbon nanotube fiber length is less than 30 ⁇ m, or the carbon nanotube fiber length is 30 ⁇ m or more, the carbon fiber membrane cannot be formed when the amount of the carbon nanotube is less than 3% by mass of the total amount. .
- the carbon nanotube may be a single wall or a multilayer of two or more layers.
- the carbon nanotubes are the first carbon nanotubes having an average fiber length in the range of 30 to 50 ⁇ m and the average fiber lengths in the range of 100 to 250 ⁇ m. And the second carbon nanotube.
- the carbon fiber membrane according to the second aspect of the present embodiment has such a configuration, so that if the total amount of carbon nanotubes is the same, the carbon fiber membrane has superior strength compared to the carbon fiber membrane according to the first aspect. Obtainable.
- the carbon fiber membrane of the second aspect of the present embodiment includes, for example, an amount in the range of 2 to 15% by mass of the total amount of the first carbon nanotubes and 1 to 5% by mass of the total amount of the second carbon nanotubes.
- a carbon material other than the carbon nanotube can be included in an amount in the range of 80 to 97% by mass of the total amount.
- the first carbon nanotube one having a fiber length having a frequency distribution shown in FIG. 1, for example, can be used.
- the said 2nd carbon nanotube can use what the fiber length equips with frequency distribution shown, for example in FIG.
- Examples of the carbon material other than the carbon nanotube include graphene, graphite, carbon black, activated carbon and the like.
- the carbon fiber membrane of the present embodiment can be manufactured as follows, for example.
- carbon nanotubes having an average fiber length in the range of 50 to 500 ⁇ m and carbon materials other than the carbon nanotubes are weighed in predetermined amounts and dispersed in a solvent.
- the amount of the carbon nanotube and the carbon material other than the carbon nanotube is, for example, in the range of 10 to 20% by mass of the carbon nanotube and 80 to 90% by mass of the carbon material other than the carbon nanotube based on the total amount. Adjust as follows.
- Examples of the solvent include alcohols, organic solvents such as aprotic polar solvents, and water.
- examples of the alcohol include ethanol and 2-propanol.
- examples of the aprotic polar solvent include N-methylpyrrolidone.
- the amount of the solvent may be an amount that can disperse the carbon nanotube and a carbon material other than the carbon nanotube, and does not need to be used excessively. Specifically, the amount of the solvent can be adjusted in a range of 500 to 1000 times the total mass of the carbon nanotube and the carbon material other than the carbon nanotube.
- the carbon nanotubes are stirred by stirring a solvent in which the carbon nanotubes and a carbon material other than the carbon nanotubes are dispersed using a stirring device such as an ultrasonic cleaner, a ball mill, a bead mill, a homogenizer, or a jet mill.
- the fiber length is adjusted to a predetermined fiber length.
- the fiber length is adjusted so that the amount of carbon nanotubes having a fiber length of 30 to 500 ⁇ m is 3% by mass or more and less than 100% by mass with respect to the total amount of the carbon nanotubes and the carbon material other than the carbon nanotubes. is required.
- the adjustment of the fiber length is such that the first carbon nanotube having an average fiber length in the range of 30 to 50 ⁇ m is 2 to 15 mass% with respect to the total amount of the carbon nanotube and the carbon material other than the carbon nanotube. It is preferable that the second carbon nanotubes having an average fiber length in the range of 100 to 250 ⁇ m are in the range of 1 to 5% by mass.
- the dispersion is filtered using a filter, and a carbon fiber film precursor composed of the carbon nanotubes and a carbon material other than the carbon nanotubes is formed on the filter.
- the filtration can be performed, for example, by vacuum filtration using a polytetrafluoroethylene filter having a pore size in the range of 0.2 to 1 ⁇ m.
- the carbon fiber membrane precursor of this embodiment is obtained by drying the carbon fiber membrane precursor with a dryer. Drying with the dryer can be performed by holding the carbon fiber membrane precursor at a temperature in the range of 10 to 30 ° C. for 5 to 60 minutes, for example.
- a carbon nanotube having a fiber length of 30 to 500 ⁇ m is bonded to a carbon material other than the carbon nanotube by van der Waals force, so that the carbon fiber membrane does not contain a binder. It is thought that it is formed.
- the first carbon nanotubes are bonded to a carbon material other than the carbon nanotubes by van der Waals force, and the number of contacts is increased by the first carbon nanotubes. It is thought that it is in the state. And it is thought that the carbon fiber membrane is formed without including a binder, when the second carbon nanotube is further bonded to the state by van der Waals force and entangled.
- Example 1 In this example, first, carbon nanotubes having an average fiber length in the range of 50 to 500 ⁇ m, carbon black as a carbon material other than carbon nanotubes, and 10% by mass of the carbon nanotubes based on the total amount, carbon black was 90% by mass, and dispersed in ethanol as a solvent.
- the amount of the solvent was 500 mass times the total mass of the carbon nanotube and carbon black.
- the fiber length of the carbon nanotubes was adjusted by stirring the solvent in which the carbon nanotubes and carbon black were dispersed using an ultrasonic cleaner as a stirring device.
- the amount of carbon nanotubes having a fiber length of 30 ⁇ m was 3% by mass with respect to the total amount of carbon nanotubes and carbon black, and the balance was carbon black.
- the carbon nanotubes with adjusted fiber lengths, carbon black, and the solvent are mixed as described above, and a dispersion liquid in which the carbon nanotubes and carbon black are dispersed in the solvent is obtained. Prepared.
- the dispersion was filtered under reduced pressure using a polytetrafluoroethylene filter having a pore size of 1.0 ⁇ m, and a carbon fiber membrane precursor composed of the carbon nanotubes and carbon black was formed on the filter.
- the carbon fiber membrane precursor was dried at a temperature of 20 ° C. for 10 minutes using a dryer.
- Comparative Example 1 In this comparative example, an attempt was made to produce a carbon fiber membrane in exactly the same manner as in Example 1 except that no carbon nanotubes were used and only carbon black as a carbon material other than carbon nanotubes was used. However, the carbon fiber membrane could not be obtained. The results are shown in Table 1.
- the fiber length of the carbon nanotubes is adjusted by stirring the solvent in which the carbon nanotubes and carbon black are dispersed using the stirring device, and the carbon nanotubes having a fiber length of 30 ⁇ m with respect to the total amount.
- a carbon fiber membrane was produced in exactly the same manner as in Example 1, except that the amount of was 100% by mass.
- Example 2 In this example, the fiber length of the carbon nanotube was adjusted by stirring the solvent in which the carbon nanotube and carbon black were dispersed using the stirring device, and the carbon nanotube having a fiber length of 30 ⁇ m with respect to the total amount.
- the carbon fiber membrane was manufactured in exactly the same manner as in Example 1 except that the amount of carbon black was 50% by mass and the balance was carbon black.
- Example 3 the fiber length of the carbon nanotube was adjusted by stirring the solvent in which the carbon nanotube and carbon black were dispersed using the stirring device, and the carbon nanotube having a fiber length of 30 ⁇ m with respect to the total amount.
- the carbon fiber membrane was manufactured in exactly the same manner as in Example 1 except that the amount of carbon was 10% by mass and the balance was carbon black.
- Example 4 In this example, a carbon fiber membrane was produced in exactly the same manner as in Example 3 except that activated carbon was used instead of the carbon black.
- Example 5 the fiber length of the carbon nanotube was adjusted by stirring the solvent in which the carbon nanotube and carbon black were dispersed using the stirring device, and the carbon nanotube having a fiber length of 120 ⁇ m with respect to the total amount.
- the carbon fiber membrane was manufactured in exactly the same manner as in Example 1 except that the amount of carbon was 10% by mass and the balance was carbon black.
- Example 6 the fiber length of the carbon nanotube was adjusted by stirring the solvent in which the carbon nanotube and carbon black were dispersed using the stirring device, and the carbon nanotube having a fiber length of 250 ⁇ m with respect to the total amount.
- the carbon fiber membrane was manufactured in exactly the same manner as in Example 1 except that the amount of carbon was 10% by mass and the balance was carbon black.
- Example 7 the fiber length of the carbon nanotube was adjusted by stirring the solvent in which the carbon nanotube and carbon black were dispersed using the stirring device, and the carbon nanotube having a fiber length of 500 ⁇ m with respect to the total amount.
- the carbon fiber membrane was manufactured in exactly the same manner as in Example 1 except that the amount of carbon was 10% by mass and the balance was carbon black.
- Example 8 the fiber length of the carbon nanotubes was adjusted by stirring the solvent in which the carbon nanotubes and carbon black were dispersed using the stirring device, and the average fiber length was 30 ⁇ m with respect to the total amount.
- the amount of the first carbon nanotubes was 15% by mass
- the amount of the second carbon nanotubes having an average fiber length of 125 ⁇ m was 5% by mass
- the remainder was carbon black.
- a carbon fiber membrane was produced in exactly the same manner.
- Example 9 In this example, the amount of the first carbon nanotubes having an average fiber length of 30 ⁇ m is 5% by mass and the amount of the second carbon nanotubes having an average fiber length of 125 ⁇ m is 5% by mass with respect to the total amount.
- a carbon fiber membrane was produced in exactly the same manner as in Example 8 except that the balance was carbon black.
- Example 10 In this example, the amount of the first carbon nanotubes having an average fiber length of 30 ⁇ m is 2% by mass and the amount of the second carbon nanotubes having an average fiber length of 125 ⁇ m is 1% by mass with respect to the total amount.
- a carbon fiber membrane was produced in exactly the same manner as in Example 8 except that the balance was carbon black.
- Example 9 in Table 3 and Examples 3 to 7 in Table 2 by using two types of carbon nanotubes, the first carbon nanotube and the second carbon nanotube, the total amount of carbon nanotubes is the same. If so, it is apparent that a carbon fiber membrane having a remarkably superior tensile strength can be obtained as compared with the case where only one type of carbon nanotube having a fiber length of 30 to 500 ⁇ m is used.
Abstract
Description
本実施例では、まず、繊維長の平均が50~500μmの範囲にあるカーボンナノチューブと、カーボンナノチューブ以外の炭素材料としてのカーボンブラックと、その合計量に対し該カーボンナノチューブが10質量%、カーボンブラックが90質量%となるように秤量し、溶媒としてのエタノールに分散させた。前記溶媒の量は、前記カーボンナノチューブとカーボンブラックとの合計質量の500質量倍とした。
本比較例では、カーボンナノチューブを全く用いず、カーボンナノチューブ以外の炭素材料としてのカーボンブラックのみを用いた以外は、実施例1と全く同一にして炭素繊維膜の製造を試みたが、成膜性が不良であり、炭素繊維膜を得ることができなかった。結果を表1に示す。
本比較例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、前記カーボンナノチューブとカーボンブラックとの合計量に対し、繊維長10μmのカーボンナノチューブの量が1質量%となるようにした以外は、実施例1と全く同一にして炭素繊維膜の製造を試みた。しかし、成膜性が不良であり、炭素繊維膜を得ることができなかった。結果を表1に示す。
本比較例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、前記カーボンナノチューブとカーボンブラックとの合計量に対し、繊維長10μmのカーボンナノチューブの量が2質量%となるようにした以外は、実施例1と全く同一にして炭素繊維膜の製造を試みた。しかし、成膜性が不良であり、炭素繊維膜を得ることができなかった。結果を表1に示す。
本比較例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、前記カーボンナノチューブとカーボンブラックとの合計量に対し、繊維長10μmのカーボンナノチューブの量が3質量%となるようにした以外は、実施例1と全く同一にして炭素繊維膜の製造を試みた。しかし、成膜性が不良であり、炭素繊維膜を得ることができなかった。結果を表1に示す。
本比較例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、前記カーボンナノチューブとカーボンブラックとの合計量に対し、繊維長30μmのカーボンナノチューブの量が1質量%となるようにした以外は、実施例1と全く同一にして炭素繊維膜の製造を試みた。しかし、成膜性が不良であり、炭素繊維膜を得ることができなかった。結果を表1に示す。
本比較例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、前記カーボンナノチューブとカーボンブラックとの合計量に対し、繊維長30μmのカーボンナノチューブの量が2質量%となるようにした以外は、実施例1と全く同一にして炭素繊維膜の製造を試みた。しかし、成膜性が不良であり、炭素繊維膜を得ることができなかった。結果を表1に示す。
本参考例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、全量に対し、繊維長30μmのカーボンナノチューブの量が100質量%となるようにした以外は、実施例1と全く同一にして炭素繊維膜を製造した。
本実施例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、全量に対し、繊維長30μmのカーボンナノチューブの量が50質量%となるようにし、残部をカーボンブラックとした以外は、実施例1と全く同一にして炭素繊維膜を製造した。
本実施例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、全量に対し、繊維長30μmのカーボンナノチューブの量が10質量%となるようにし、残部をカーボンブラックとした以外は、実施例1と全く同一にして炭素繊維膜を製造した。
本実施例では、前記カーボンブラックに代えて活性炭を用いた以外は、実施例3と全く同一にして炭素繊維膜を製造した。
本実施例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、全量に対し、繊維長120μmのカーボンナノチューブの量が10質量%となるようにし、残部をカーボンブラックとした以外は、実施例1と全く同一にして炭素繊維膜を製造した。
本実施例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、全量に対し、繊維長250μmのカーボンナノチューブの量が10質量%となるようにし、残部をカーボンブラックとした以外は、実施例1と全く同一にして炭素繊維膜を製造した。
本実施例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、全量に対し、繊維長500μmのカーボンナノチューブの量が10質量%となるようにし、残部をカーボンブラックとした以外は、実施例1と全く同一にして炭素繊維膜を製造した。
本実施例では、前記攪拌装置を用いて、前記カーボンナノチューブとカーボンブラックとが分散された溶媒を撹拌することにより、前記カーボンナノチューブの繊維長を調整し、全量に対し、繊維長の平均が30μmの第1のカーボンナノチューブの量が15質量%となり、繊維長の平均が125μmの第2のカーボンナノチューブの量が5質量%となるようにし、残部をカーボンブラックとした以外は、実施例1と全く同一にして炭素繊維膜を製造した。
本実施例では、全量に対し、繊維長の平均が30μmの第1のカーボンナノチューブの量が5質量%となり、繊維長の平均が125μmの第2のカーボンナノチューブの量が5質量%となるようにし、残部をカーボンブラックとした以外は、実施例8と全く同一にして炭素繊維膜を製造した。
本実施例では、全量に対し、繊維長の平均が30μmの第1のカーボンナノチューブの量が2質量%となり、繊維長の平均が125μmの第2のカーボンナノチューブの量が1質量%となるようにし、残部をカーボンブラックとした以外は、実施例8と全く同一にして炭素繊維膜を製造した。
Claims (7)
- カーボンナノチューブと、カーボンナノチューブ以外の炭素材料とのみからなる炭素繊維膜であって、30~500μmの範囲の繊維長のカーボンナノチューブを全量の3質量%以上100質量%未満の範囲の量で含むことを特徴とする炭素繊維膜。
- 請求項1記載の炭素繊維膜において、前記範囲の繊維長のカーボンナノチューブを全量の3~50質量%の範囲の量で含むことを特徴とする炭素繊維膜。
- 請求項1記載の炭素繊維膜において、前記カーボンナノチューブ以外の炭素材料は、カーボンブラック又は活性炭のいずれか1種であることを特徴とする炭素繊維膜。
- 請求項1記載の炭素繊維膜において、前記カーボンナノチューブは、繊維長の平均が30~50μmの範囲にある第1のカーボンナノチューブと、繊維長の平均が100~250μmの範囲にある第2のカーボンナノチューブとからなることを特徴とする炭素繊維膜。
- 請求項4記載の炭素繊維膜において、前記第1のカーボンナノチューブを全量の2~15質量%の範囲の量、前記第2のカーボンナノチューブを全量の1~5質量%の範囲の量、前記カーボンナノチューブ以外の炭素材料を全量の80~97質量%の範囲の量で含むことを特徴とする炭素繊維膜。
- 請求項4記載の炭素繊維膜において、前記カーボンナノチューブは、繊維長の平均が30μmである第1のカーボンナノチューブと、繊維長の平均が125μmである第2のカーボンナノチューブとからなることを特徴とする炭素繊維膜。
- 請求項4記載の炭素繊維膜において、前記カーボンナノチューブ以外の炭素材料は、カーボンブラックであることを特徴とする炭素繊維膜。
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