JP2006016222A - Method for rupturing carbon nanotube and carbon nanotube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for rupturing carbon nanotubes, by which the carbon nanotubes can be easily and efficiently ruptured; and to provide ruptured carbon nanotubes ruptured by the same. <P>SOLUTION: In the method for rupturing the carbon nanotubes, for example, a pressurized carbon nanotube-supporting liquid is sent into complicated flow passages of fine tubes, and the carbon nanotubes are ruptured by the collision of the carbon nanotube-supporting liquid with the wall surface and by the shear force, shock waves, cavitation, expansion or the like, generated when the carbon nanotube-supporting liquid are allowed to collide to each other and to flow together. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a carbon nanotube breaking method and a carbon nanotube.

As a method for breaking and cutting carbon nanotubes, one disclosed in Japanese Patent Application Laid-Open No. 2004-43258 is known. The cutting method disclosed in this publication is characterized in that the carbon nanotubes are cut by crushing the mixed solution in which the carbon nanotubes are dispersed in the saccharide solution after heating and drying.
JP 2004-43258 A

According to the rupture method disclosed in the above publication, it is expected that the carbon nanotubes can be cut relatively easily. However, according to the examples, in order to cut the carbon nanotubes 1g, The work time in the ball mill alone takes a long time of 2 hours, the work efficiency is poor, and the carbon nanotubes have to be separated from the rod-shaped body after cutting, which requires many steps.
Therefore, an object of the present invention is to provide a carbon nanotube breaking method capable of easily and efficiently breaking carbon nanotubes, and a carbon nanotube broken by the method.

Said subject is achieved by the structure in any one of the following (1)-(15) of this invention.
(1) A substantially cylindrical breaking device main body, a plurality of supply nozzles arranged at substantially symmetrical positions around the central axis of the cylinder at one end of the breaking device main body, and the axial direction of the breaking device main body from each supply nozzle An inflow passage extending a predetermined length in the end direction and extending again there from the axial direction at the other end in the axial direction of the breaking device main body, and a carbon nanotube-carrying liquid pressurized from the inflow passage are introduced to break the carbon nanotube. A hard material having an outflow passage having one end communicating with the breaking member and the other end opened at the other end of the breaking device, and the breaking members are arranged in close contact with each other to flow out the breaking member and the broken carbon nanotube The first and second plate members are substantially circular and formed in the first plate member. The first plate member extends in the thickness direction of the first plate member and is smaller than the size of the inflow passage. Introducing passages respectively communicating with the entrance passages are provided, and extend between the first and second plate members in the radial direction of the breaking device main body, and the plurality of introducing flow paths on the breaking device main body side. A first processing passage that communicates with the end portion, and a second processing passage that extends in a direction substantially orthogonal to the first processing passage and that communicates with the first processing passage in the central portion; and Carbon nanotubes using a carbon nanotube breaker provided with a plurality of lead-out passages provided in a plate member, extending in the plate thickness direction, one end communicating with the end of the second processing passage and the other end communicating with the outflow passage A method for breaking carbon nanotubes, characterized by breaking the carbon nanotubes.
(2) A sealed container having an inlet pipe and an outlet pipe, a sphere or regular polyhedron breaking device body fixed in a floating state in the container, and drilling from the surface of the breaking device body toward the center A carbon nanotube breaking method using a carbon nanotube breaking device comprising a plurality of holes intersecting at a center and a conduit communicating with a specific hole among the holes and the outlet pipe, the carbon nanotube supporting liquid By applying pressure to the inlet tube and introducing it from the inlet pipe, the carbon nanotubes flow in together with the liquid from the plurality of holes on the surface of the breaking device body, merge at the center thereof, and through the specific holes and conduits, A method for breaking carbon nanotubes, wherein the carbon nanotubes are broken and taken out from an outlet tube.
(3) A hollow outer cylinder, and a hollow inner cylinder that is inserted and disposed with a space in the outer cylinder and has one end closed, and the inner cylinder has a carbon nanotube-supported liquid introduced into the other end. And a carbon nanotube-supporting liquid passage communicating therewith, and a plurality of walls extending from the carbon nanotube-supporting liquid passage to a space between the inner cylinder and the outer cylinder. A method of breaking carbon nanotubes using a carbon nanotube breaking device in which a lead-out port communicating with the space is provided in the outer cylinder, and supporting the carbon nanotubes under pressure The carbon nanotube is ruptured by passing the liquid through the carbon nanotube-supporting liquid passage and the surface through-hole. How to break tube.
(4) A carbon nanotube breaking method using a carbon nanotube breaking device in which an orifice-shaped pressure passage is formed in a part of a passage having an introduction port and a discharge port, wherein a carbon nanotube-supporting liquid is subjected to pressure. A method of breaking carbon nanotubes, wherein the carbon nanotubes are broken by passing the passage and the orifice-shaped pressure passage.
(5) A plurality of flow paths are formed in a sealed container having an inlet pipe and an outlet pipe, and a pressurized carbon nanotube-supporting liquid is introduced from the inlet pipe into the flow path, and the carbon nanotubes are introduced into the flow path. A carbon nanotube breaking method in which a turbulent flow, a high-speed flow, a shock wave, or the like is caused in a carbon nanotube-carrying liquid by passing the carrying liquid, thereby breaking the carbon nanotube.
(6) A carbon nanotube breaking method in which a pressurized carbon nanotube-supported liquid is branched into two flow paths, superaccelerated by an outflow nozzle, ejected, and opposed to collide at a portion where they merge again to break the carbon nanotube.
(7) The pressurized carbon nanotube-carrying liquid is fed into a complicated capillary channel, the carbon nanotube-carrying liquid collides with the chamber wall surface, and the shearing force generated when the carbon nanotube-carrying liquid collides with each other, A method of breaking carbon nanotubes that breaks carbon nanotubes by shock waves, cavitation, expansion, etc.
(8) When the pressure applied to the carbon nanotube-carrying liquid is A, the number of repetitions of rupture treatment through the carbon nanotube-carrying liquid through the carbon nanotube breaker is B, A is 100 Mpa or more, B is 10 or more, and A × The method for breaking carbon nanotubes according to any one of the above (1) to (7), wherein the value of B is set to 1200 or more, and the carbon nanotubes having a length of 3 μm to 6 μm are broken to a state containing approximately 60% or more.
(9) When the pressure applied to the carbon nanotube-carrying liquid is A, the number of repetitions of the rupture treatment through the carbon nanotube-carrying liquid to the carbon nanotube breaking device is B, A is 100 Mpa or more, B is 10 or more, and A × The method for breaking carbon nanotubes according to any one of the above (1) to (7), wherein the value of B is 2600 or more, and the carbon nanotubes having a length of 3 μm to 6 μm are broken into a state containing almost 80% or more.
(10) The carbon nanotube breaking method according to any one of (1) to (9), wherein the concentration of carbon nanotubes in the carbon nanotube-supporting liquid is 0.001 to 30% by weight.
(11) The above-mentioned, which improves the dispersion effect by cutting and removing particles and carbon nanoparticles that are not formed into a tube shape even if they are amorphous or crystalline, which is a factor that impedes dispersion, (1) A method for breaking a carbon nanotube according to any one of (10).
(12) The carbon nanotube breaking method according to any one of the above (1) to (10), wherein the length of the carbon nanotubes is made uniform to some extent to loosen the entanglement and improve dispersibility.
(13) The carbon nanotube breaking method according to any one of (1) to (10), wherein the length of the carbon nanotube broken by the diameter of the passage or the like in the carbon nanotube breaking device is adjusted.
(14) The carbon nanotube to be broken is a form in which graphene having a pentagonal, hexagonal, heptagonal, or octagonal mesh is wound, and is a single-walled or multi-walled one having a thickness of 1 nm to several hundreds of nanometers ( The method for breaking carbon nanotubes according to any one of 1) to (13).
(15) Carbon nanotubes broken by the breaking method according to any one of (1) to (14) above.

In the breaking method of the present invention, the carbon nanotubes can be easily and efficiently broken in a short time by using the breaking device having the above-described configuration and passing the pressurized carbon nanotube-supporting liquid.
In addition, both the ends of the carbon nanotubes were opened because the particles and carbon nanoparticles that were amorphous or crystalline but were not formed into a tube shape could be cut.
By opening both ends of the carbon nanotube, properties such as electron emission, hydrogen storage, and capacitance of the carbon nanotube are improved.
In addition, since the carbon nanotubes were cut to an appropriate substantially uniform length, the carbon nanotubes were easily dispersed evenly, and the dispersion efficiency when mixed with another substance was increased. Further, the carbon nanotubes having a substantially uniform length when attached to another substance exhibited a substantially uniform effect on the attached surface.

  Hereinafter, a breaking device for carrying out a method for breaking a carbon nanotube according to an embodiment of the present invention will be described with reference to the accompanying drawings. Note that in this specification, the carbon nanotubes to be broken are in a form in which graphene having a pentagonal, hexagonal, heptagonal, or octagonal mesh is wound, and are single-walled or multi-layered with a thickness of 1 nm to several hundred nm And

  First, the breaking device according to the first embodiment will be described with reference to FIGS. The breaking device 10 includes a substantially cylindrical breaking device main body 12, a plurality of supply nozzles 14 disposed at one end of the breaking device main body 12 at substantially symmetrical positions around the central axis of the cylinder, and the supply nozzles 14. An inflow passage 16 extending for a predetermined length in the other axial direction of the breaking device main body 12 and extending again for a predetermined length in the other axial direction of the breaking device main body, a carbon nanotube-supporting liquid from the inflow passage is introduced, A breaking member 18 for breaking the carbon nanotubes and an outflow passage 20 having one end communicating with the breaking member and the other end opened to the other end of the breaking device main body are provided for flowing the broken carbon nanotubes. As shown in FIG. 2, the breaking member 18 includes substantially circular first and second plate members 22, 24 that are closely juxtaposed and formed of a hard material. The first plate member is provided with introduction passages 26 that extend in the thickness direction of the first plate member and that are smaller than the size of the inflow passage 16 and communicate with the inflow passage 16. Between the first and second plate members 22, 24, a first processing passage that extends in the radial direction of the breaking device main body 12 and communicates with the ends of the plurality of introduction passages 26 on the breaking device main body side. 28, and a second processing passage 30 that extends in a direction substantially orthogonal to the first processing passage 28 and communicates with the first processing passage in the central portion. The second plate member 24 is provided with a plurality of outlet passages 32 extending in the plate thickness direction, one end communicating with the end portion of the second processing passage 30 and the other end communicating with the outflow passage 20. Yes. The first and second processing passages 28 and 30 may have the same size, for example, a rectangular cross section having a width of 0.23 mm, a length of 1.8 mm, and a depth of 0.23 mm. The introduction passage 26 and the lead-out passage 32 may be the same size and have a circular cross section with a diameter of 2 mm.

  In this example, the first processing passage 28 is formed by the groove 34 formed in the first plate member 22 shown in FIGS. 3 and 4, and the second processing passage 30 is changed to the second plate shown in FIGS. 5 and 6. The grooves 36 are formed in the member 24. However, shallow cross-shaped grooves are formed on the mating surfaces of the first and second plate members, and these are combined to form a processing path. Any configuration may be used.

A carbon nanotube-supporting liquid supply source 60 is connected to the supply nozzle 14 of the apparatus 10 via a pressurizing device 50, and the carbon nanotube-supporting liquid from the carbon nanotube-supporting liquid supply source 60 is applied by the pressurizing device 50. The carbon nanotubes are broken by being supplied to the apparatus 10 in a pressed state. The carbon nanotube-supporting liquid supply source 60 may be connected to the outflow passage 20 of the apparatus main body 12. As a result, the carbon nanotube-carrying liquid treated by the apparatus 10 and having the carbon nanotubes broken can be automatically returned to the carbon nanotube-carrying liquid supply source 60. This facilitates repetition of the breaking process through the carbon nanotube supporting liquid through the carbon nanotube breaking device.
By appropriately selecting the size of the processing path of the breaking member, the length of the carbon nanotube after breaking can be adjusted.

Next, a carbon nanotube breaking method using the carbon nanotube breaking device described above will be described.
First, a carbon nanotube supporting solution is prepared by suspending 0.001 to 30% by weight of carbon nanotubes in water or an organic solvent. If it is less than 0.001% by weight, the collision force between the carbon nanotube-carrying liquids is reduced, so that effective breakage cannot be achieved. If it exceeds 30%, the viscosity becomes too high and the collision force is not inferior, and the effect is not reduced. .

  The adjusted carbon nanotube-supporting liquid is preliminarily dispersed in an ultrasonic generator for about 10 minutes. This pre-dispersed carbon nanotube-carrying liquid is put into a carbon nanotube-carrying liquid supply source, and supply to the apparatus is started. The supplied carbon nanotube supporting solution is pressurized to 100 Mpa or more, preferably 100 to 200 Mpa by the pressurizing device 50. The carbon nanotube-carrying liquid flows into the breaking device 10 in a state of being pressurized in this way, and the carbon nanotubes are broken by passing through the processing passage and the like. This rupture process is performed by a repeated process in which the ruptured process is repeatedly supplied to the rupture device. The number of repetitions is 10 times or more, preferably 10 to 20 times.

  The pressure of the carbon nanotube-supporting liquid and the number of repetitions of the rupture treatment are preferably in the following relationship. When the pressure (Mpa) is A and the number of repetitions is B, the value of A × B is 1200 or more, preferably 2600 or more. When the value is 1200 or more, the carbon nanotube having a length of 3 μm to 6 μm can be broken into a state in which almost 60% or more is contained. Moreover, when it is 2600 or more, it becomes possible to break into a state in which almost 80% of carbon nanotubes having a length of 3 μm to 6 μm are contained.

  To demonstrate this, there are attached scanning photomicrographs and TG / DTA graphs. In this example, A is 140, B is 20, and therefore the value of A × B is 2800. In the scanning micrograph (FIG. 7), most of the carbon nanotubes are entangled and aggregated before processing, the length varies from 3 μm to 20 μm, and one end thereof is closed. However, the treated carbon nanotubes (FIG. 8) had a uniform length of about 3 μm to 6 μm. Particles and carbon nanoparticles that were amorphous or crystalline but not formed into a tube shape were broken, and carbon nanotubes with open ends were generated. Aggregation and entanglement before treatment were It is gone.

  Moreover, when the TG / DTA graph is seen, the combustion peak before the treatment (FIG. 9) is 708.8 degrees after the treatment (FIG. 10) compared with 808.8 degrees, and the combustion temperature is lowered because the carbon nanotubes are broken. . In addition, the amorphous or crystalline particles that are not formed in a tube shape and the carbon nanoparticles are broken from the carbon nanotubes, and both ends are opened and the both ends are opened. It became exposed and became easy to burn at low temperatures. One sharp peak is formed at the temperature peak at which the carbon nanotubes burn both in the graph before and after the treatment. Since there are two or more peaks in the presence of impurities or damaged carbon nanotubes, this development has produced undamaged broken carbon nanotubes that have not lost the properties of carbon nanotubes. In the graph after treatment, a clear combustion peak was observed at 293.4 degrees, and the weight decreased by 4%. This peak is a particle or carbon nanoparticle that is amorphous or crystalline but is not formed into a tube shape and is broken from the carbon nanotube. This is because these substances are more combustible than the tube structure and burn at low temperatures. The low temperature peak is not seen in the graph before the treatment, but it is because the carbon nanotubes and amorphous or crystalline particles that are not formed into a tube and carbon nanoparticles are combined. It was because it was burned at the same temperature. Compared with before treatment, the TG graph after treatment shows a gentle curve toward the combustion temperature of carbon nanotubes. This is because short carbon nanotubes that are easy to burn at low temperatures are produced. By opening both ends of the carbon nanotube as described above, the properties of the carbon nanotube such as electron emission, hydrogen storage, and capacitance are improved.

  In addition, since the carbon nanotubes were cut to an appropriate substantially uniform length, the carbon nanotubes were easily dispersed evenly, and the dispersion efficiency when mixed with another substance was increased. Further, the carbon nanotubes having a substantially uniform length when attached to another substance exhibited a substantially uniform effect on the attached surface. Dispersion effect could be improved by cutting and removing particles and carbon nanoparticles that are not formed into a tube shape even though they are amorphous or crystalline, which is a factor that hinders dispersion. . Furthermore, by making the length of the carbon nanotubes constant to some extent, it was possible to loosen the entanglement and improve the dispersibility.

The analysis was performed by the above TG / DTA (differential heat, thermogravimetry machine) and measurement using a scanning electron microscope. The change in weight of the sample due to the increase (decrease) in the ambient temperature is recorded with respect to time (temperature) as a TG curve, and the temperature difference between the reference and sample is detected by the electromotive force of the thermocouple installed in the sample holder This is used as a DTA curve, which is a measurement method with excellent quantitativeness. The treated carbon nanotubes were dried under reduced pressure and a sample was collected. In the scanning electron microscope, the processed sample was dried under reduced pressure, and several locations were photographed at random, from which 100 carbon nanotubes were measured.
Next, the carbon nanotube breaking device according to the second embodiment will be described with reference to FIG.

  The carbon nanotube breaking device 100 includes a sealed container 106 having an inlet tube 102 and an outlet tube 104, a spherical or regular polyhedral breaking device body 108 fixed in a floating state in the container, and the breaking device body. A plurality of holes 110 that are drilled from the surface toward the center and intersect at the center, and a conduit 112 that communicates a specific hole among the holes and the outlet pipe. In the figure, the example in which the inlet pipe 102 and the outlet pipe 104 are arranged in a straight line has been described. However, for example, the inlet pipe 102 and the outlet pipe 104 may be arranged in parallel in the upper lid-like portion. The diameter of the hole 110 is preferably about 0.2 to 0.8 mm.

  In the method for breaking carbon nanotubes using the present carbon nanotube breaking device, a pressure is applied to the carbon nanotube-supporting liquid and the carbon nanotubes are introduced from the inlet pipe, whereby the carbon nanotubes together with the liquid have a plurality of holes on the surface of the breaking device body. The carbon nanotubes are broken and taken out from the outlet pipe through the specific holes and conduits. The pressurization and the number of repetitions of the carbon nanotube-supporting liquid are the same as described above.

In other words, the above-described breakage of the carbon nanotubes means that a plurality of flow paths are formed in a sealed container having an inlet pipe and an outlet pipe, and pressurized carbon nanotube-supporting liquid is transferred from the inlet pipe to the flow path. This is a carbon nanotube breaking method in which a turbulent flow, a high-speed flow, a shock wave or the like is caused in the carbon nanotube-carrying liquid by introducing the carbon nanotube-carrying liquid through the flow path, thereby breaking the carbon nanotube.
Next, a carbon nanotube breaking device according to a third embodiment will be described with reference to FIGS.

The carbon nanotube breaking device 200 includes a hollow outer cylinder 202, and a hollow inner cylinder 206 that is inserted and arranged with a space 204 in the outer cylinder 202 and has one end 206a closed. The other end 206b is formed with an introduction port 208 through which the carbon nanotube-carrying liquid is introduced. The introduction port 208 communicates with the inlet 208 to form a carbon nanotube-carrying liquid passage 210, and is formed in the wall 212 of the end portion of the inner cylinder. Is provided with a plurality of through holes 214 extending from the carbon nanotube-supporting liquid passage to the space 204 between the inner cylinder and the outer cylinder, and the outer cylinder is provided with a lead-out port 216 communicating with the space. Yes. The diameter of the through hole 214 is preferably about 0.2 to 0.8 mm.
In the carbon nanotube breaking method using the present carbon nanotube breaking device, the carbon nanotube-carrying liquid under pressure is broken through the carbon nanotube-carrying liquid passage and the surface through-hole. The pressurization and the number of repetitions of the carbon nanotube-supporting liquid are the same as described above.

Next, a carbon nanotube breaking device according to a fourth embodiment will be described with reference to FIG.
The carbon nanotube breaking device 300 includes a substantially cylindrical device main body 302, and the device main body 302 is provided with a carbon nanotube-supporting liquid passage 308 having an introduction port 304 and a discharge port 306. An orifice-shaped pressure passage 310 is formed in a part of the carbon nanotube-supporting liquid passage 308. The diameter of the pressure passage 310 is preferably about 0.2 to 0.8 mm.

In the carbon nanotube breaking method using the present carbon nanotube breaking device, the carbon nanotube-carrying liquid is broken by passing the pressurized carbon nanotube-carrying liquid through the passage and the orifice-shaped pressure passage. The pressurization and the number of repetitions of the carbon nanotube-supporting liquid are the same as described above.
Alternatively, the pressurized carbon nanotube-supported liquid may be branched into two flow paths, super-accelerated by an outflow nozzle, ejected, and opposed to collide at a portion where the carbon nanotubes are recombined to break the carbon nanotube.
Furthermore, the pressurized carbon nanotube-carrying liquid is fed into a complicated thin tube flow path, the carbon nanotube-carrying liquid collides with the chamber wall surface, and the shear force generated when the carbon nanotube-carrying liquid collides with each other, The carbon nanotubes may be broken by shock waves, cavitation, expansion, or the like.

Examples of the present invention will be described below. In the following examples, an example using the carbon nanotube breaking apparatus shown in FIG. 1 and the like will be described.
First, a carbon nanotube supporting solution was prepared by suspending 0.1% by weight of carbon nanotubes in water to which a surfactant was added.
The prepared carbon nanotube-supported liquid was predispersed in an ultrasonic generator for about 10 minutes. This pre-dispersed carbon nanotube-carrying liquid is put into a carbon nanotube-carrying liquid supply source, and supply to the apparatus is started. The supplied carbon nanotube supporting solution is flowed into the breaking device 10 while being pressurized by the pressurizing device 50, and the carbon nanotubes are broken by passing through the processing passage and the like. This rupture treatment was performed by a repeated treatment in which the ruptured treatment was repeatedly supplied to the breaking device.

Specifically, as shown in Table 1, the pressure and the number of repetitions are as follows. In Example 1, the pressure A is 100 MPa, the number of repetitions B is 12, and in Example 2, the pressure A is 120 MPa and the number of repetitions B 10 times, in Example 3, the pressure A was 120 MPa, the number of repetitions B was 22 times, and in Example 4, the pressure A was 140 MPa and the number of repetitions B was 20 times.
Table 1 shows the content of broken carbon nanotubes having a length of 3 to 6 μm.

この表から本発明の効果が明らかである。なお、上記第２形態以降の構造のカーボンナノチューブ破断装置についても同様の実験を行ったところ、第１形態の装置の場合よりは多少効果が劣ったが、ほぼ同様の効果が得られた。

The effect of the present invention is clear from this table. The same experiment was performed on the carbon nanotube breaking device having the structure of the second and subsequent embodiments, and almost the same effect was obtained although the effect was somewhat inferior to that of the device of the first embodiment.

It is a schematic diagram which shows the structure of the carbon nanotube fracture | rupture apparatus by the 1st form of this invention. It is sectional drawing of the principal part of the fracture | rupture apparatus shown in FIG. It is a front view of the 1st plate member of the principal part shown in FIG. It is a longitudinal cross-sectional view of the 1st plate member shown in FIG. It is a front view of the 2nd plate member of the principal part shown in FIG. It is a longitudinal cross-sectional view of the 2nd plate member shown in FIG. It is a scanning micrograph of the carbon nanotube before a fracture | rupture process. It is a scanning micrograph of the carbon nanotube after a fracture | rupture process. It is a figure which shows the TG / DTA graph of the carbon nanotube before a fracture | rupture process. It is a figure which shows the TG / DTA graph of the carbon nanotube after a fracture | rupture process. It is a partially broken view of the carbon nanotube breaking device according to the second embodiment of the present invention. FIG. 6 is a partially cutaway view of a carbon nanotube breaking device according to a third embodiment of the present invention. It is sectional drawing of the fracture | rupture apparatus shown in FIG. It is a partially broken figure of the carbon nanotube breaking device by the 4th form of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Carbon nanotube breaking device 12 Breaking device main body 14 Supply nozzle 16 Inflow passage 18 Breaking member 20 Outflow passage 22 First plate member 24 Second plate member 26 Introduction passage 28 First treatment passage 30 Second treatment passage 32 Outlet passage 34 Groove 36 Groove 50 Pressurizing device 60 Carbon nanotube-carrying liquid supply source

Claims (15)

A substantially cylindrical breaking device main body, a plurality of supply nozzles arranged at substantially symmetrical positions around the central axis of the cylinder at one end of the breaking device main body, and from each supply nozzle toward the other end in the axial direction of the breaking device main body An inflow passage extending for a predetermined length and extending again therefor in the axial direction other end direction of the breaking device main body, a rupture member that breaks the carbon nanotube by introducing a carbon nanotube-supporting liquid under pressure from the inflow passage, And an outflow passage having one end communicating with the breaking member and the other end opened at the other end of the breaking device, and the breaking member is formed of a hard material in close contact with each other to flow out the broken carbon nanotube. The first and second plate members having substantially circular shapes, the first plate member extending in the thickness direction of the first plate member and being smaller than the size of the inflow passage. Introducing passages respectively communicating with each other, extending between the first and second plate members in a radial direction of the breaking device main body, end portions of the plurality of introducing flow paths on the breaking device main body side are provided. A first processing path that communicates with the first processing path, and a second processing path that extends in a direction substantially orthogonal to the first processing path and communicates with the first processing path is formed at the center, and the second plate member The carbon nanotube is broken using a carbon nanotube breaking device provided with a plurality of outlet passages extending in the plate thickness direction, one end communicating with the end of the second processing passage, and the other end communicating with the outflow passage. A carbon nanotube breaking method characterized by the above. A sealed container having an inlet pipe and an outlet pipe, a sphere or regular polyhedron breaker body fixed in a floating state in the container, and a hole drilled from the surface of the breaker body toward the center. A carbon nanotube breaking method using a carbon nanotube breaking device comprising a plurality of intersecting holes and a conduit communicating with a specific hole among the holes and the outlet pipe, wherein pressure is applied to the carbon nanotube-supporting liquid. By introducing from the inlet pipe, the carbon nanotube flows together with the liquid from a plurality of holes on the surface of the breaking device main body, and merges at the center thereof, and from the outlet pipe through the specific hole and conduit A method for breaking carbon nanotubes, wherein the carbon nanotubes are broken and taken out. A hollow outer cylinder, and a hollow inner cylinder that is inserted and disposed with a space in the outer cylinder and closed at one end, and the inner cylinder has an introduction port into which the carbon nanotube-supporting liquid is introduced at the other end Are formed and communicated with each other to form a carbon nanotube-supporting liquid passage, and a plurality of through holes extending from the carbon nanotube-supporting liquid passage to a space between the inner cylinder and the outer cylinder in the wall portion of the inner cylinder The carbon nanotube breaking method using the carbon nanotube breaking device provided with a lead-out port communicating with the space in the outer cylinder, wherein the carbon nanotube-supporting liquid under pressure is applied, The carbon nanotube is fractured by passing the carbon nanotube-supporting liquid passage and the surface through-hole. Method of breaking drive. A carbon nanotube breaking method using a carbon nanotube breaking device in which an orifice-shaped pressure passage is formed in a part of a passage having an introduction port and a discharge port. And breaking the carbon nanotube by passing through the orifice-shaped pressure passage. A plurality of flow paths are formed in a sealed container having an inlet pipe and an outlet pipe, a pressurized carbon nanotube supporting liquid is introduced into the flow path from the inlet pipe, and the carbon nanotube supporting liquid is introduced into the flow path. A method of breaking carbon nanotubes, which causes turbulent flow, high-speed flow, shock waves, and the like to occur in the carbon nanotube-supported liquid by passing through, thereby breaking the carbon nanotubes. A carbon nanotube breaking method in which a pressurized carbon nanotube-supported liquid is branched into two flow paths, superaccelerated by an outflow nozzle, ejected, and opposed to collide at a portion where they merge again to break the carbon nanotube. Shear force, shock wave, and cavitation generated when carbon nanotube-supported liquid collides with the carbon nanotube-supported liquid and the collision between the carbon nanotube-supported liquid and the carbon nanotube-supported liquid. A method for breaking carbon nanotubes, which breaks carbon nanotubes by expansion or the like. Assuming that the pressure applied to the carbon nanotube-carrying liquid is A, the number of repetitions of the breaking process through the carbon nanotube-carrying liquid to the carbon nanotube breaking device is B, A is 100 Mpa or more, B is 10 or more, and A × B The method of breaking carbon nanotubes according to any one of claims 1 to 7, wherein the breaking is performed in a state in which carbon nanotubes having a length of 3 µm to 6 µm are contained in an amount of about 60% or more. Assuming that the pressure applied to the carbon nanotube-carrying liquid is A, the number of repetitions of the breaking process through the carbon nanotube-carrying liquid to the carbon nanotube breaking device is B, A is 100 Mpa or more, B is 10 or more, and A × B The method of breaking carbon nanotubes according to any one of claims 1 to 7, wherein the breaking method is such that carbon nanotubes having a length of 3 to 6 µm are contained in an amount of about 80% or more, with 2600 or more. The carbon nanotube breaking method according to any one of claims 1 to 9, wherein the carbon nanotube concentration in the carbon nanotube-supporting liquid is 0.001 to 30% by weight. The dispersion effect is improved by cutting and removing particles and carbon nanoparticles that are not formed into a tube shape even if they are amorphous or crystalline, which is a factor that hinders dispersion, which the carbon nanotube has. 10. The method for breaking any one of 10 carbon nanotubes. The method of breaking carbon nanotubes according to any one of claims 1 to 10, wherein the length of the carbon nanotubes is made uniform to some extent to loosen the entanglement and improve dispersibility. The method for breaking carbon nanotubes according to any one of claims 1 to 10, wherein the length of the broken carbon nanotubes is adjusted by the diameter of the passage or the like in the carbon nanotube breaking device. The carbon nanotubes to be broken are in a form in which graphene having a pentagonal, hexagonal, heptagonal, or octagonal network is wound, and are single-walled or multi-walled with a thickness of 1 nm to several hundred nm. A method for breaking carbon nanotubes. The carbon nanotube fractured | ruptured by the fracture | rupture method in any one of Claims 1-14.

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