JP2005262391A - Composite material composed of nano carbon and carbonaceous second filler and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nano carbon composite material capable of realizing an originally possessing characteristic of nano carbon. <P>SOLUTION: This nano carbon composite material is a porous body having a void part by three-dimensionally connecting a carbon nano tube or carbon nano fiber (hereinafter referred to as a carbonaceous first filler) by carbon including a carbonaceous second filler; and is characterized in that the void part of the porous body is impregnated with resin, rubber, metal or a carbonaceous material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a composite material composed of nanocarbon and a carbon-based second filler, and a method for producing the same. More specifically, the present invention relates to a composite material having excellent thermal conductivity of a composite material composed of nanocarbon and a carbon-based second filler. Moreover, it is related with the manufacturing method.

Conventionally, a resin composition having a desired conductivity has been proposed by blending carbon such as carbon black and carbon fiber into a resin. In contrast, in recent years, attempts have been made to blend carbon nanotubes in place of conventional carbon black and carbon fibers in order to impart excellent electrical conductivity and mechanical properties to the molded body. A composite material including carbon nanotubes in a matrix has been proposed. (Japanese Patent No. 2641712). Known forms of carbon nanotubes in the resin composition include those in which carbon nanotubes form aggregates or become entangled in the resin. (Japanese Patent No. 3034027). As a material having physical properties close to those of a carbon-containing dendritic composition, a nanocomposite resin in which a silicate layer of a layered silicate is uniformly dispersed in a polyamide resin at a molecular level is known. (Japanese Unexamined Patent Publication No. 2000-345029). A resin composition, a molding material, and a molded body in which carbon nanotubes are not aggregated and dispersed in the resin without being entangled are known. (Japanese Patent Laid-Open No. 2003-12939).

Japanese Patent No. 2641712 (refer to claim 1) Japanese Patent No. 3034027 (refer to claim 1) JP 2000-345029 A (refer to claim 1) JP 2003-12939 A (refer to claim 1)

However, the above prior art has a problem in that the excellent characteristics of carbon nanotubes or carbon nanofibers cannot be fully utilized.

The present invention has been made in view of the above points, and an object of the present invention is to provide a nanocarbon composite material capable of realizing the inherent properties of nanocarbon.

In order to solve the above problems, the nanocarbon composite material of the present invention is such that carbon nanotubes or carbon nanofibers (hereinafter referred to as carbon-based first fillers) are three-dimensionally connected with carbon containing a carbon-based second filler. The porous body has a void portion, and the void portion of the porous body is impregnated with resin, rubber, metal, or carbon-based material.

The nanocarbon composite material of the present invention is a carbon-based first porous body having a structure in which carbon nanotubes or carbon nanofibers (hereinafter referred to as carbon-based first filler) are connected to a carbon-based second filler by carbon. Since the filler, the second filler, and the carbon are firmly connected in three dimensions, it has the original characteristics of nanocarbon. The composite material impregnated in the voids of the porous body has the characteristics of the impregnating material. This means that the characteristics far surpassed can be obtained. Further, since the porous body can be impregnated with resin, rubber, metal, or carbon-based material, it can be applied to various materials and has a wide range of applications.

Furthermore, the nanocarbon composite material of the present invention is the above-mentioned claim 1,
The carbon-based first filler has a particle size of 0.3 nm to 200 nm, an average length of 10 μm to 20 μm, and a spectrum by Raman spectroscopy having a graphite (G) peak at 1520 to 1600 cm ^−1. It is characterized by.

In the nanocarbon composite material of the present invention, the carbon-based first filler has a particle diameter of 0.3 nm to 200 nm and an average length of 10 μm to 20 μm. The connection with carbon is strengthened, and the spectrum of nanocarbon by Raman spectroscopy is made to have a graphite (G) peak at 1520 to 1600 cm ⁻¹ , so that it is possible to demonstrate the inherent characteristics of nanocarbon. .

Furthermore, the nanocarbon composite material of the present invention is the above-described first or second aspect, wherein the carbon-based second filler is a fullerene or a diameter of a carbon nanofiber or carbon nanotube of the carbon-based first filler. Further, it is characterized in that it is selected from one or more of carbon black having a small particle diameter, or cut carbon nanotubes or cut carbon nanofibers having an average cut length of 0.5 μm to 5 μm.

The above-mentioned nanocarbon composite material of the present invention is the above-described first or second aspect, wherein the second carbon-based filler is fullerene, carbon black having a particle size of 10 nm to 120 nm, and a cutting length of 0.5 μm. Since it was selected from one or more of the above-mentioned cut carbon nanotubes or cut carbon nanofibers having a size of 5 μm, the carbon-based second filler is incorporated into the carbon, and the carbon containing the carbon-based second filler is the carbon-based first. A porous body having voids that are three-dimensionally connected with the filler is obtained.

Furthermore, the nanocarbon composite material of the present invention is the above-described first, second, or third aspect, wherein the carbon-based first filler and the carbon-based second filler have a content of up to 90 wt%. Features.

In the nanocarbon composite material of the present invention, the carbon-based first filler and the carbon-based second filler have a content of up to 90 wt% in the carbon-based first filler and the carbon-based second filler. It is possible to provide composite materials that take advantage of these characteristics.

Furthermore, in the nanocarbon composite material of the present invention, the content of the carbon-based second filler when the total amount of the carbon-based first filler and the carbon-based second filler is 100 wt% is 1 wt% to 70 wt%. %.

The nanocarbon composite material of the present invention is the above-described first, second, third, or fourth aspect, when the total amount of the first carbon filler and the second carbon filler is 100 wt%. Since the content of the carbon-based second filler is 1 wt% to 70 wt%, the carbon-based first filler and the carbon-based second filler can be combined in a wide range, and the characteristics of the carbon-based first filler and the carbon-based second filler Can be appropriately controlled.

Furthermore, the method for producing a nanocarbon composite material of the present invention is a step of kneading the carbon-based first filler, the carbon-based second filler, a thermosetting resin, and an aqueous or alcohol-based diluent ( Hereinafter referred to as a kneading step), a step of evaporating the liquid contained in the diluted solution and the thermosetting resin from the kneaded product that has undergone the above kneading step (hereinafter referred to as a drying step), and the above drying step. A step of molding at a predetermined pressure and a predetermined temperature while defoaming the dried carbon-based first filler / carbon-based second filler / resin (hereinafter referred to as press molding),
The molded product that has undergone the above press molding is heated in an inert atmosphere to carbonize the resin, and the carbon-based first filler is a porous body that is three-dimensionally connected to the carbon-based second filler and carbon. It is characterized by comprising a step (hereinafter referred to as a carbonization step) and a step of impregnating a void of the porous body that has undergone the carbonization step with a resin, rubber, metal, or carbon-based material (hereinafter referred to as an impregnation step).

In the method for producing a nanocarbon composite material according to the present invention, the porous body obtained in the carbonization step is obtained by connecting a carbon-based first filler and a carbon-based second filler with carbon, and a small amount in the kneading step. A large amount of carbon-based first filler and carbon-based second filler can be mixed with the thermosetting resin of the above, so that a high-density porous body can be obtained, and the excellent properties inherent in nanocarbon can be exhibited. is there. Furthermore, since the porous body can be impregnated with a synthetic resin, rubber, metal, or carbon-based material, the application range is wide.

Whether the nanocarbon composite material of the present invention has excellent characteristics will be described below.
In the nanocarbon composite material of the present invention, a porous body having a void portion in which carbon nanotubes or carbon nanofibers (hereinafter referred to as carbon-based first filler) are connected by carbon to form a three-dimensional network is formed. The voids of the porous body are impregnated with resin, rubber, metal, or carbon-based material.
A schematic diagram of a porous body constituting the composite material of the present invention is shown in FIG. FIG. 1 is a schematic diagram based on the result of analyzing the above porous body with an electron micrograph.
As shown in FIG. 1, the carbon-based first fillers, which are carbon nanotubes (CNT) or carbon nanofibers (CNF), are connected by forming a network with carbon.
Furthermore, since the porosity of the porous body can be controlled, a nanocarbon composite material having a large content of the carbon-based first filler and the carbon-based second filler is obtained, and the carbon-based first filler and the carbon-based material are obtained. It is possible to provide a composite material that maximizes the characteristics of the second filler.
Further, since the carbon-based second filler is contained in the carbon, it is possible to add the characteristics of the carbon-based second filler in addition to the characteristics of the carbon-based first filler.
Specifically, the carbon-based second filler is selected from fullerene, carbon black, cut carbon nanofibers, or cut carbon nanotubes, and the carbon-based second filler is more than the carbon-based first filler. It is a necessary condition that the size is small.
The porous body in the present invention is synonymous with English Preform.

The nanocarbon composite material of the present invention is to make a network-type porous body 5 in which nanocarbon 1 is three-dimensionally connected by a carbon-based second filler 2 and carbon 3. To impregnate resin, rubber, metal, and carbon-based materials.
The above features of the present invention will be specifically described below.

(Example 1)
First, the manufacturing method of the nanocarbon composite material which impregnated resin etc. in the porous body 5 which connected the carbon-type 1st filler 1 of this invention with the carbon 3 containing the carbon-type 2nd filler 2 is demonstrated.

First, carbon black 2 serving as a carbon-based second filler-2, a solution-type thermosetting resin, and a diluent (aqueous or alcohol-based) are prepared, and primary kneading is performed to mix them.
Next, secondary kneading is performed in which the carbon nanofiber (CNF) 1 which is the carbon-based first filler 1 is mixed with the kneaded material after the primary kneading.
In the kneading step, the carbon-based first filler 1 is formed by the primary kneading, the carbon-based second filler 2 is formed by the secondary kneading, or the carbon-based first filler 1 and the carbon-based second filler 2 are mixed. May be mixed with the solution-type thermosetting resin and the diluting solution at the same time, but the carbon-based second filler 2 may be mixed by the primary kneading, and the carbon-based first filler 1 may be mixed by the secondary kneading. It is easier to mix. The reason is that the amount (bulk) of the carbon-based second filler 2 is smaller than the amount (bulk) of the carbon nanofibers 1, so that the diluent can be sufficiently distributed to the carbon-based second filler 2. is there.
The carbon nanofibers 1 and the carbon nanotubes 1 that are the carbon-based first fillers 1 are vapor-grown carbon fibers or carbon nanotubes (single-layer, double-layer, multi-layer). It is desirable that the average length is 0.3 to 200 nm and the average length is 10 to 20 μm. The spectrum of the carbon nanofiber 1 and the carbon nanotube 1 by Raman spectroscopy has a graphite (G) peak at 1520 to 1600 cm-1.
It is important that the average particle diameter of the carbon black 2 serving as the carbon-based second filler 2 is smaller than the average diameter of the carbon nanofiber 1 that is the carbon-based first filler 1 or the carbon nanotube 1. It becomes. The reason is that the carbon black 2 that is the carbon-based second filler 2 is contained in the carbon nanofiber 1 that is the carbon-based first filler 1 or the carbon 3 that three-dimensionally connects the carbon nanotubes 1. It is because it is contained.
In addition to the carbon black 2, the carbon-based second filler 2 may be a cut carbon nanofiber (cut carbon nanofiber) 2 having an average length of 0.5 to 5 μm, or a cut carbon nanotube ( (Cut nanotubes) 2 or fullerenes (one having a network structure in which 60 or more carbon atoms are strongly bonded to form a spherical or tube-like structure, having a diameter of 1 nanometer or less) 2 can be applied. The average length of the cut carbon nanofibers 2 and the cut nanotubes 2 of 0.5 to 5 μm is sufficiently smaller than the lengths of the carbon nanofibers 1 and the carbon nanotubes 1 that are the carbon-based first fillers 1. This is because is an essential condition.
As the solution type thermosetting resin, phenol, epoxy, polyurethane and the like can be used. As the diluting solution, pure water and distilled water can be used for the aqueous system, and ethyl alcohol, methyl alcohol and the like can be used for the alcohol system.
The reason for using the diluted solution is that the specific surface area of the carbon nanofiber (CNF) 1 is large. For example, when 5 g of thermosetting resin is added to 5 g of the CNF 1, Since the resin does not permeate and mix with all of CNF1, the viscosity is lowered by using the diluent and the amount of solvent is increased so that the resin is mixed with all of CNF1. Therefore, the amount of the diluted solution is set so that the thermosetting resin is sufficiently mixed with the CNF 1.
The kneading method is performed manually or using an automatic kneader. The kneading time is sufficient for the CNF 1 to have an overall gloss.

Next, the kneaded product after the kneading step is heated in air to perform a drying step of evaporating the diluted liquid and the liquid component in the thermosetting resin. The heating temperature is a temperature that is lower than the curing temperature of the thermosetting resin and does not cause a polymerization reaction, and takes a sufficient time. For example, in the case of the thermosetting resin having a curing temperature of 150 ° C., 1 hour is appropriate when the drying temperature is 60 to 80 ° C., and 7 to 9 hours are appropriate when the drying temperature is 40 to 55 ° C. When the kneaded material is stirred in the above drying step, it can be efficiently evaporated.

Next, a pressing step is performed in which the mixture 14 composed of the carbon-based first filler / carbon-based second filler / resin after the drying step is molded at a predetermined pressure and a predetermined temperature while degassing.
An example of the pressing process will be specifically described with reference to FIG. FIG. 2 shows a press molding apparatus. The female mold 6 is placed with the carbon-based first filler / carbon-based second filler / resin mixture 14 that has undergone the above-described drying step, and the male mold 7 is used to apply pressure while the female mold 7 is pressed. The thermosetting resin is heated by the heater 8 arranged around the thermosetting resin 6 to cure the thermosetting resin. This operation is performed in a vacuum so as to remove air contained in the mixture 14 composed of the carbon-based first filler / carbon-based second filler / resin and volatile components accompanying polymerization of the thermosetting resin. The pressure is 0 to 1000 kg / cm @ 2. The heating temperature is the curing temperature of the thermosetting resin. The pressure at this time is related to the density of the porous body 5 in the next carbonization step. When the pressure is increased, the porous body 5 has few voids, and when the pressure is lowered, the porous body 5 has large voids.
The pressure is applied for at least the time until the thermosetting resin is completely cured.

Next, the above-mentioned press-formed product 15 is heated in a deoxidizing atmosphere to carbonize the resin component, so that the carbon-based first filler 1 is a porous body 5 connected by the carbon-based second filler 2 and carbon 3. A carbonization process is performed.
A specific example in the case where the deoxidizing atmosphere is performed with charcoal is schematically shown in FIG. The molded product 15 that has been subjected to the above pressing process is placed on a first stainless steel container (or alumina container) 12, and the first stainless steel container 12 is covered with charcoal 11, and the charcoal 11 is a second stainless steel. It is held in a container 13. A heater 8 is provided around the second stainless steel container 13 to carbonize the resin component at a temperature of 500 to 1200 ° C. in the atmosphere. Since the charcoal 11 reacts with oxygen earlier than the carbon-based first filler 1 and the resin, the carbon-based first filler 1 and the resin can be prevented from being oxidized. In the case of the apparatus shown in FIG. 3 above, since it is an electric furnace that performs the carbonization treatment in the atmosphere, only a temperature up to 1200 ° C. can be applied, but when it is performed in a graphite furnace in an inert atmosphere, 1000 ° C. to 3000 ° C. Carbonization becomes possible in the temperature range of. The higher the carbonization temperature (closer to 3000 ° C.), the more graphitized carbon is obtained.

A schematic view of the porous body after the carbonization step is shown in FIG. The schematic diagram of FIG. 1 is based on the photograph which image | photographed said porous body with the scanning electron microscope.
As is clear from FIG. 1, the carbon-based first filler 1 that is the carbon nanotube (CNT) 1 or the carbon nanofiber (CNF) 1 is connected by forming a network with the carbon 3, so that it becomes a strong bond. .
Furthermore, since the porosity of the porous body 5 can be controlled, the nanocarbon composite material having a large content of the carbon-based first filler 1 and the carbon-based second filler 2 is obtained. It is possible to provide the nanocarbon composite material that makes the best use of the characteristics of the carbon-based first filler 1 and the carbon-based second filler 2.
Further, since the carbon-based second filler 2 is contained in the carbon 3, it is possible to add the characteristics of the carbon-based second filler 2 in addition to the characteristics of the carbon-based first filler 1.

Next, the carbon-based first filler 1 that has been subjected to the above carbonization step is bonded to the void 4 of the matrix porous body 5 in which the carbon-based second filler 2 and the carbon 3 are firmly connected, and resin, rubber, metal, carbon-based When the material is impregnated, the nanocarbon composite material of the present invention is obtained. The resulting composite material has properties that far exceed those of the impregnated material.
As the impregnating material, thermosetting resin and thermoplastic resin can be used as the resin, natural rubber and synthetic rubber can be used as the rubber, magnesium and aluminum can be used as the metal, and glassy carbon can be used as the carbon-based material.

As the impregnation method, a pressure method and a suction method can be applied. FIG. 4 is a schematic view of a pressure type impregnation apparatus. The porous body 5 and the impregnation material 16 of the present invention are inserted into a compression mold composed of a female mold 6 and a male mold 7, and the porous body 5 is impregnated with the impregnation material 16 by pressure. The compression mold can be heated by the heater 8. When the filler cures the resin monomer with a curing agent, heating by the heater 8 is not necessary. This pressure system is applicable to all of the above impregnated materials.
FIG. 5 is a schematic view of a suction type impregnation apparatus. This suction method is effective for a material that is hardened by a curing agent, although the filler 16 cannot be applied to a metal or carbon-based material.

The characteristic evaluation results of the composite material produced by the composite material manufacturing method of the present invention are shown in FIGS.

FIG. 6 shows that the carbon nanofiber 1 corresponding to the carbon-based first filler 1 is a vapor growth carbon fiber (VGCF) having an average diameter of 150 nm and an average length of 10 to 20 μm. As the second filler 2, carbon black (CB) 2 having an average particle diameter of 95 nm is used, and the gas phase of the porous body 5 when the total amount of VGCF 1 and CB 2 is 50 wt%, 60 wt%, and 70 wt%. The relationship between the weight percent (wt%) of the growth carbon fiber (VGCF) 1 and the thermal conductivity (W / cm · K) is shown.
In FIG. 6, for example, ▲ VGCF + CB (average particle size 95 nm) total amount: 70 wt% (carbonization) is the porous shown in FIG. 1 after the above carbonization step, and (VGCF + CB) is 70 wt%. The remaining 30 wt% means carbon. In the figure, the VGCFcontent on the horizontal axis (X axis) indicates the VGCFcontent with respect to the entire carbon-based second filler 2 and the carbon 3 and includes VGCFcontent at the position of 60% in the case of the rightmost ▲. In this case, VGCFcontent is 60%, CBcontent is 10%, and carbon content is 30%.
Further, ΔVGCF + CB (average particle size 95 nm) in total Δ: 70 wt% (press molding) has undergone the press molding process.
From the results shown in the figure, the relationship between the total amount of VGCF1 and CB2 of the present invention and the thermal conductivity shows a high thermal conductivity value when 50 wt%, and the thermal conductivity becomes low when 60 wt% and 70 wt%.
The relationship between the amount of the carbon-based first filler (VGCF) 1 and the thermal conductivity is that the carbon-based first filler (VGCF) 1 has a maximum value at 50 wt%, and the content of VGCF 1 is more than 50 wt%. When becomes smaller, the value of thermal conductivity becomes smaller.
Further, in the figure, ◆ VGCF (carbonization) includes the carbon-based second filler 2 in the carbon-based first filler 1 of the present invention as compared with VGCF alone which does not include the carbon-based second filler 2. It is clear that the thermal conductivity is higher.

FIG. 7 shows that the carbon nanofiber 1 corresponding to the carbon-based first filler 1 is a vapor growth carbon fiber (VGCF) having an average diameter of 150 nm and an average length of 10 to 20 μm. As the second filler 2, the carbon black (CB) 2 having an average particle diameter of 18 nm is used, and the vapor grown carbon fiber of the porous body 5 when the total amount of the VGCF 1 and the CB 2 is 50 wt% The relationship between the weight percentage (wt%) of (VGCF) 1 and thermal conductivity (W / cm · K) is shown.
From the results shown in FIG. 6, when the VGCF1 is in the range of 0 to 35%, the thermal conductivity increases as the content of the VGCF1 increases (as the content of CB2 increases).
Further, in the figure, ◆ VGCF (carbonization) is compared with the VGCF alone which does not include the carbon-based second filler 2 and the carbon-based second filler 2 is added to the carbon-based first filler 1 of the present invention. The inclusions clearly show higher values of thermal conductivity.

FIG. 8 shows that the carbon nanofiber 1 corresponding to the carbon-based first filler 1 is a vapor growth carbon fiber (VGCF) having an average diameter of 150 nm and an average length of 10 to 20 μm. As the system second filler 2, a cut carbon nanofiber (c-VGCF) 2 having an average diameter of 150 nm and an average cutting length of 1 to 3 μm is used, and the total amount of the VGCF1 and the c-VGCF2 is 50 wt%. The relationship between the weight percent (wt%) of the vapor growth carbon fiber (VGCF) 1 of the porous body 5 and the thermal conductivity (W / cm · K) is shown.
From the results shown in FIG. 5, in the range of VGCF1 from 0 to 35%, the thermal conductivity increases as the content of VGCF1 increases (the content of CB2 decreases).
Further, in the figure, ◆ VGCF (carbonization) includes the carbon-based second filler 1 in the carbon-based first filler 1 of the present invention as compared with the VGCF 1 alone that does not include the carbon-based second filler 1. It is clear that the thermal conductivity is higher.

As shown in FIGS. 6 to 8 above, the present invention is such that the total amount (wt%) of the carbon-based first filler 1 and the carbon-based second filler 2 is 90 wt% by appropriately selecting the mixing ratio of the resin. Production is possible, and it becomes possible to provide a carbon nanofiber 1 of the carbon-based first filler 1 or a nanocarbon composite material that maximizes the characteristics of the carbon nanotube 1 and the carbon-based second filler 1.
Further, when the total amount of the carbon-based first filler 1 and the carbon-based second filler-2 is 100 wt%, the content of the carbon-based second filler 2 can be from 1 wt% to 70 wt%. In addition to the characteristics of the carbon-based first filler 1, it is possible to provide a nanocarbon composite material that makes use of the characteristics of the second filler 2.

As described above, in the nanocarbon composite material of the present invention, the porous body 5 having a structure in which the nanocarbon 1 is connected by the carbon-based second filler 2 and the carbon 3 is composed of the nanocarbon 1, the carbon-based second filler 2, and the carbon 3. Has the original characteristics of nanocarbon 1 because it is three-dimensionally connected, and the composite material impregnated in the void 4 of the porous body 5 has characteristics that far exceed the characteristics of the impregnated material. It will be obtained. Further, since the porous body 4 can be impregnated with resin, rubber, metal, or carbon-based material, it can be applied to various materials and has a wide range of applications.

The carbon-type 1st filler of this invention shows the schematic diagram of the matrix porous body to which the carbon-type 2nd filler and carbon were firmly connected. The specific example of the press apparatus in the press process of this invention is shown with the schematic diagram. The specific example of the carbonization apparatus in the case of performing the deoxidizing atmosphere in the carbonization process of this invention with charcoal is shown with the schematic diagram. The schematic diagram of the specific example of the impregnation apparatus by the pressure system in the impregnation process of this invention is shown. The schematic diagram of the specific example of the impregnation apparatus by the suction system in the impregnation process of this invention is shown. The nano-material of the porous body 4 that has undergone the carbonization step of the composite material containing the nanocarbon fiber (vapor-grown carbon fiber: VGCF) of the present invention and the carbon-based second filler (carbon black (CB): average particle size 95 nm). The relationship between the content rate of carbon fiber (vapor-grown carbon fiber: VGCF) and thermal conductivity (W / cm · K) is shown. The nano-material of the porous body 4 that has undergone the carbonization step of the composite material containing the nanocarbon fiber (vapor-grown carbon fiber: VGCF) of the present invention and the carbon-based second filler (carbon black (CB): average particle size 18 nm). The relationship between the content rate of carbon fiber (vapor-grown carbon fiber: VGCF) and thermal conductivity (W / cm · K) is shown. A composite material containing the nanocarbon fiber (vapor grown carbon fiber: VGCF) of the present invention and a carbon-based second filler (a nanocarbon fiber cut (c-VGCF), average length: 1 to 3 μm). The relationship between the content rate of the nanocarbon fiber (vapor growth carbon fiber: VGCF) of the porous body 4 which passed through the carbonization process, and thermal conductivity (W / cm * K) is shown.

Explanation of symbols

1 Carbon-based first filler (carbon nanofiber or carbon nanotube)
2 Carbon second filler (carbon black, cut carbon nanofiber, or cut carbon nanotube)
3 Carbon 4 Cavity 5 Porous body 6 Female die 7 Male die 8 Heater 9 Vacuum port 10 Vacuum pressure vessel 11 Charcoal 12 First stainless steel vessel (or alumina vessel)
13 Second stainless steel container 14 Carbon-based first filler / carbon-based second filler / resin mixture 15 after drying process Molded product 16 after pressing process Impregnated material

Claims (6)

The carbon nanotube or the carbon nanofiber (hereinafter referred to as a carbon-based first filler) is a porous body that is three-dimensionally connected with carbon including a carbon-based second filler and has a void portion. A nanocarbon composite material, wherein the void portion is impregnated with resin, rubber, metal, or carbon-based material. The carbon-based first filler has a particle size of 0.3 nm to 200 nm, an average length of 10 μm to 20 μm, and a spectrum by Raman spectroscopy having a graphite (G) peak at 1520 to 1600 cm ^−1. The nanocarbon composite material according to claim 1, The carbon-based second filler may be fullerene, carbon black having a particle diameter smaller than the diameter of the carbon nanofiber or carbon nanotube of the carbon-based first filler, or an average cut length of 0.5 μm to 5 μm. 3. The nanocarbon composite material according to claim 1, wherein the nanocarbon composite material is selected from one or more of certain cut carbon nanotubes or cut carbon nanofibers. The nanocarbon composite material according to claim 1, 2, or 3, wherein the carbon-based first filler and the carbon-based second filler have a content of up to 90 wt%. The content of the second carbon-based filler is from 1 wt% to 70 wt% when the total amount of the first carbon-based filler and the second carbon-based filler is 100 wt%. The nanocarbon composite material according to 2, 3, or 4. A step of kneading the carbon-based first filler, the carbon-based second filler, a thermosetting resin, and an aqueous or alcohol-based diluent (hereinafter referred to as a kneading step), and kneading after the kneading step. A step of evaporating the liquid contained in the diluted solution and the thermosetting resin from the product (hereinafter referred to as a drying step), and a carbon-based first filler / carbon-based second filler dried through the drying step. -A step of molding at a predetermined pressure and a predetermined temperature while defoaming a resin mixture (hereinafter referred to as a press molding step),
The molded product that has undergone the above press molding is heated in an inert atmosphere to carbonize the resin, and the carbon-based first filler is a porous body that is three-dimensionally connected to the carbon-based second filler and carbon. Nano comprising: a step (hereinafter referred to as a carbonization step), and a step of impregnating a void of the porous body that has undergone the carbonization step with a resin, rubber, metal, or carbon-based material (hereinafter referred to as an impregnation step) A method for producing a carbon composite material.

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