KR20100096377A - Method for manufacturing carbon nano tube-alumium composition material - Google Patents

Abstract

PURPOSE: A manufacturing method of a carbon nanotube-aluminum composite material is provided to enhance the dispersion of carbon nanotubes by using a carbon nanotube-copper complex. CONSTITUTION: A manufacturing method of a carbon nanotube-aluminum composite material comprises the following steps: producing a carbon nanotube-copper complex; mixing the carbon nanotube-copper complex with aluminum; and sintering the mixture from the previous step. The producing process of the carbon nanotube-copper complex comprises the following steps: forming a carbon nanotube dispersion solution; mixing a copper acetate solution with the solution and stirring; plasticizing the mixed solution to obtain carbon nanotube-copper oxide powder; and reducing the carbon nanotube-copper oxide powder.

Description

Manufacturing method of carbon nanotube (CNT) -aluminum composite material {METHOD FOR MANUFACTURING CARBON NANO TUBE-ALUMIUM COMPOSITION MATERIAL}

The present invention relates to a method for producing a carbon nanotube (CNT) -aluminum composite material, and more particularly, to a carbon nanotube (CNT) in which carbon nanotubes are well dispersed with aluminum by forming a composite of carbon nanotubes and copper. It relates to a method for producing an aluminum composite material.

Currently, research is being actively conducted to use carbon nanotubes as reinforcing materials not only in ceramics but also in polymer and metal composite materials. CLXu et al. (CLXu, BQWei, RZMa, J.Liang, XKMa, DHWu, Carbon 37, 855 ~ 858, 1999) are used to manufacture aluminum powder and carbon Disclosed is a method for producing a composite of high strength and high conductivity using a sintering method through mixing and hot pressing of nanotube powder.

However, the existing process is only a simple mixing level of the carbon nanotubes and the raw material known powder state, it is difficult to improve the characteristics thereby. In other words, the powder-level mixing cannot remove the factors affecting the composite properties such as high porosity and reinforcement agglomeration in the microstructure during the composite material manufacturing. The result is that in the field of manufacturing carbon nanotube reinforced composites, the predominant tendency is to obtain raw materials from actual materials to the real products, and carbon nanotubes surround the diffusion path between base materials during mixing and sintering of powders. It is caused by interference.

As such, the conventional method of mixing carbon nanotubes and aluminum is simply mechanical mixing using a device such as a ball mill by simply mixing aluminum and carbon nanotubes. There is a problem.

In addition, in the case of simple mixing, there is a problem in that the production of the die casting method is not easy due to the density difference between the carbon nanotubes and the aluminum.

SUMMARY OF THE INVENTION An object of the present invention is to prepare a carbon nanotube (CNT) -aluminum composite material by using a composite of copper bonded to carbon nanotubes to solve the agglomeration of carbon nanotubes, thereby enhancing the dispersion of carbon nanotubes. Accordingly, to provide a method for producing a carbon nanotube (CNT) -aluminum composite material excellent in properties.

In addition, to provide a method for producing a carbon nanotube (CNT) -aluminum composite material that can be easily manufactured to improve productivity.

The present invention, a) preparing a carbon nanotube (CNT) -copper composite; b) mixing the carbon nanotubes (CNT) -copper composite and aluminum; And c) provides a method for producing a carbon nanotube (CNT) -aluminum composite material comprising the step of sintering the mixture of step b).

It provides a carbon nanotube (CNT) -aluminum composite material prepared by the manufacturing method according to the present invention.

According to the present invention, in preparing a carbon nanotube (CNT) -aluminum composite material, by solving the agglomeration phenomenon of carbon nanotubes by using a composite of copper bonded to carbon nanotubes, as the dispersion of carbon nanotubes is enhanced Provided is a method for producing a carbon nanotube (CNT) -aluminum composite material having excellent characteristics.

In addition, there is provided a method for producing a carbon nanotube (CNT) -aluminum composite material which can be easily manufactured to improve productivity.

Method for producing a carbon nanotube (CNT) -aluminum composite material according to the present invention, a) preparing a carbon nanotube (CNT) -copper composite; b) mixing the carbon nanotubes (CNT) -copper composite and aluminum; And c) sintering the mixture of step b).

The carbon nanotube-copper composite prepared in step a) means a state in which carbon nanotubes and copper are chemically bonded (see FIG. 1), and the carbon nanotube-aluminum composite material prepared in step c) is carbon. The nanotube-copper composite refers to a state in which physicochemically bonded to aluminum.

The chemical bond means a functional group formed by acid treatment on the carbon nanotube wall surface and copper molecules are bonded to the functional group. The physical and chemical bond means that the carbon nanotube-copper composite powder is ball milled through aluminum powder. It refers to a chemical reaction between aluminum and carbon nanotubes or aluminum and copper particles due to physical impact and heat generation in the process of grinding and dispersion.

The carbon nanotubes used in step a) may be multi wall nanotubes (MWNTs), thin wall nanotubes (TWNTs), or single wall nanotubes (SWNTs).

Step a) comprises the steps of: a1) preparing a carbon nanotube dispersion solution comprising carbon nanotubes; a2) adding a copper acetate solution to the carbon nanotube dispersion solution prepared in step a1) and stirring the solution; a3) calcining the stirred solution in step a2) to obtain carbon nanotube (CNT) -copper oxide powder; And a4) reducing the carbon nanotubes (CNT) -copper oxide powder of step a3) to obtain the carbon nanotubes (CNT) -copper composite.

The step a1) comprises the steps of: a11) acid treating the carbon nanotubes, and mixing and dispersing the carbon nanotubes in an acid solution; a12) refluxing the solution prepared in step a11); a13) filtering, washing, and drying the solution of step a12) to obtain a powder; And a14) dispersing the powder of step a13) in distilled water or an organic solvent to obtain the carbon nanotube dispersion solution.

The acid solution used in step a11) may be an acid solution including one or more selected from nitric acid, sulfuric acid, and hydrochloric acid.

In step a11), the carbon nanotubes may be mixed with more than 0 to 5 wt% and the acid solution is less than 95 to 100 wt%. When the carbon nanotube is more than 5wt%, it may be difficult to obtain functionalization by acid.

In step a11), it may be dispersed by ultrasonication.

In step a14), the powder of step a13) may be dispersed at 0.01 to 1 wt%, and the distilled water or organic solvent may be dispersed at 99 to 99.99 wt%.

Specifically, the amount of carbon nanotubes that can be dispersed in distilled water or an organic solvent after functionalization by the acid treatment in step a11) is based on the weight% (wt%), 0.01 to 1 wt% of carbon nanotubes and Distilled water or an organic solvent may be 99 ~ 99.99wt%. Here, when the carbon nanotube exceeds 1wt%, it may be difficult to expect the dispersion effect due to the aggregation of carbon nanotubes.

Examples of the organic solvent used in step a14) include ethanol, acetone, 1,2-Dichloroethane (DCE), Tetrahydrofuan (THF), Dimethyl formamide (DMF), and 1-Methyl-2-pyrrolidinone (NMP). Can be.

In the step a2), the carbon nanotube dispersion solution and the copper acetate so that the weight ratio of the carbon nanotubes contained in the carbon nanotube dispersion solution and the copper acetate solution is 99.99: 0.01-50: 50 The solution can be mixed.

For example, based on 100wt%, the carbon nanotubes contained in the carbon nanotube dispersion solution in the stirred solution in step a2) are 50-99.99wt%, and the copper contained in the copper acetate solution is 0.01-. It may be 50wt%.

The content of copper in the stirred solution in step a2) may be 0.01 to 50wt% relative to the content of carbon nanotubes contained in the carbon nanotube dispersion solution.

In the case of copper, since the density is more than three times higher than that of aluminum (8.96g / cm ³ ) and aluminum (2.7 g / cm ³ ), copper has the effect of inhibiting separation due to the low density of carbon nanotubes (about 1.2). It is preferable that the content of is 0.01 to 50wt%. If the copper content is less than 0.01wt%, it may be difficult to form copper particles, and if it exceeds 50wt%, the grain size may be caused by coarsening of the copper particles rather than the walls of the carbon nanotubes.

In the step a2) it can be stirred through the ultrasonic treatment.

Before the step a3), further comprising the step of filtering and drying the stirred solution in step a2), in the step a3), it may be calcined in a nitrogen atmosphere.

The temperature condition in the drying step is 60 ~ 100 ℃, the temperature condition in the step a3) may be 300 ~ 500 ℃.

In step a4), the carbon nanotubes (CNT) -copper oxide powder of step a3) may be reduced to the carbon nanotubes (CNT) -copper composite by applying heat in a mixed gas atmosphere containing hydrogen gas. have.

Here, the mixed gas may include a gas selected from argon gas, nitrogen gas, and a mixed gas of argon gas and nitrogen gas and the hydrogen gas.

For example, the mixed gas may include 70 to 96% of the gas selected from argon gas, nitrogen gas, and a mixed gas of argon gas and nitrogen gas, and the hydrogen gas may include 4 to 30%.

The temperature condition of step a4) may be 250 ~ 550 ° C.

The step a) including the steps a1) to a4) will be described in detail as an example, but is not limited thereto.

In step a), a1) carbon nanotubes are dispersed by ultrasonication in nitric acid, sulfuric acid, hydrochloric acid, or a strong acid solution such as sulfuric acid and nitric acid (3: 1), and reflux is performed in the acid solution for 2 to 24 hours. Hydroxyl or carboxyl groups were introduced outside the nanotubes, filtered, washed with distilled water until pH7 in distilled water, dried and then distilled water (or ethanol, acetone, 1,2-Dichloroethane (DCE), Tetrahydrofuan (THF) ), Dispersing in a range of 0.01 to 1wt% relative to the weight of an organic solvent such as dimethyl formamide (DMF) and 1-Methyl-2-pyrrolidinone (NMP); a2) adding a copper acetate solution to the carbon nanotube dispersion solution prepared in step a1) and stirring the solution; a3) filtering and drying the stirred solution in step a2) and calcining to obtain carbon nanotube (CNT) -copper oxide powder; And a4) reducing the carbon nanotubes (CNT) -copper oxide powder of step a3) to obtain the carbon nanotubes (CNT) -copper composite.

Of the carbon nanotubes (CNT) -copper composite prepared in step a), the content of carbon nanotubes is 50 ~ 99.99wt%, the content of copper may be 0.01 ~ 50wt%.

Carbon nanotubes (CNT) -copper composite prepared in step a) can be confirmed through an example of FIG. 1. In the photograph of FIG. 1, the particles are copper particles, and the fibers are carbon nanotubes.

In step b), the carbon nanotube (CNT) -copper composite may be added in an amount of 0.01 to 30 parts by weight based on 100 parts by weight of aluminum. More preferably, it may be 0.1 to 5 parts by weight.

For example, the carbon nanotube (CNT) -copper composite powder may be added in an amount of 0.01 to 30 parts by weight based on 100 parts by weight of aluminum powder.

In this case, when the amount of the carbon nanotube-copper composite is less than 0.01 part by weight, it may be difficult to expect the strengthening effect due to the insufficient effect of the strengthening.

In addition, when the amount of the carbon nanotube-copper composite is more than 30 parts by weight, it may not be possible to fire aluminum, and brittleness may increase, resulting in deterioration of mechanical properties.

Meanwhile, in the step a), the carbon nanotube (CNT) -copper composite is prepared in powder form, and before the b), the aluminum further comprises preparing the powder in powder form. Carbon nanotube (CNT) -copper composite powder may be mixed with the aluminum powder.

Alternatively, in the step a), the carbon nanotube (CNT) -copper composite is prepared in powder form, and further comprising preparing the aluminum as molten aluminum before the step b), in the step b), The carbon nanotubes (CNT) -copper composite powder may be mixed with molten aluminum.

Alternatively, in the step a), the carbon nanotube (CNT) -copper composite is prepared in the form of a sintered body, and further comprising the step of preparing the aluminum as molten aluminum before the step b), in the step b), The carbon nanotube (CNT) -copper composite sintered body may be mixed with molten aluminum.

Before the step c), it may further comprise the step of ball milling the mixture of step b).

The temperature condition in step c) may be 400 ~ 750 ℃.

In step c), high frequency induction heating or spark plasma sintering may be performed.

On the other hand, when the carbon nanotube (CNT) -aluminum composite material manufacturing method according to the present invention will be described in more detail, for example, ① carbon nanotube by ultrasonic treatment of a mixed solution of carbon nanotube powder and strong acid solution Dispersing and introducing a functional group by performing reflux on a strong acid solution; (2) attaching copper particles to the outside of the functionalized carbon nanotubes; And ③ mixing carbon nanotubes having copper particles with the aluminum powder to disperse them.

In step ①, the carbon nanotubes are dispersed by ultrasonication in nitric acid, sulfuric acid, hydrochloric acid, or a strong acid solution such as sulfuric acid and nitric acid (3: 1), and reflux is performed in the strong acid solution for 2 to 24 hours. A hydroxyl group or a carboxyl group is introduced outside the carbon nanotubes.

Step ② is a bonding step of carbon nanotubes and copper, and is made through oxidation and reduction of copper. Firstly, a carbon nanotube-copper oxide powder is produced by chemical treatment of the solution having completed the dispersion step and vaporization of alcohol.

To this end, copper acetate (Cu (CH ₃ COO) ₂ · H ₂ O]] is added to the solution in which the dispersion step is completed, and then ultrasonicated again. Through this, a step of obtaining carbon nanotube-copper oxide powder is performed. Preferably, the sonicated solution may vaporize the alcohol through magnetic sterling and leave only carbon nanotube-copper oxide powder.

A reduction step is performed to reduce the carbon nanotube-copper oxide powder produced secondaryly to produce carbon nanotube-copper powder.

Reduction of the carbon nanotube-copper oxide powder is performed by applying heat to the carbon nanotube-copper oxide powder produced in a mixed gas atmosphere of argon (Ar) gas and hydrogen (H ₂ ) gas. Preferably, at about 300 ° C., carbon nanotube-copper is reduced in a mixed gas atmosphere containing 96% argon gas and 4% hydrogen gas. This completes the production of carbon nanotube-copper composite.

As the step ③, the step of mixing the carbon nanotube-copper powder as aluminum as a carbon nanotube-copper composite is performed.

It may mechanically mix carbon nanotube-copper powder and aluminum powder, mix carbon nanotube-copper powder with molten aluminum, or mix carbon nanotube-copper sintered body with molten aluminum.

In this step, the mechanical mixing in the aluminum powder state may be expected to have a higher dispersion efficiency through a state in which the primary dispersion is made in the aluminum matrix by spraying through dispersion of carbon nanotubes in addition to ball milling.

Here, in the case of melting and using aluminum to form a carbon nanotube-aluminum composite material, a relationship of densifying the structure through rapid heating is included. High frequency induction heating or spark plasma sintering may be used for this. When the above-described process is performed, a carbon nanotube-aluminum composite material is manufactured.

On the other hand, according to the present invention, it is possible to provide a carbon nanotube (CNT) -aluminum composite material prepared by the above-described manufacturing method.

As described above, the carbon nanotube (CNT) -aluminum composite material prepared by the method according to the present invention has a content of carbon nanotubes of 0.01 to 15 wt%, a copper content of 0.001 to 15 wt%, and an aluminum content of It may be 70 ~ 99wt%. In the case of carbon nanotube (CNT) -aluminum composite material having such a content, it can provide an effect of increasing the tensile strength compared to the existing pure aluminum, it can provide a feature that the reduction in elongation is not large.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, this does not limit the scope of the present invention.

Example 1

5 g of multi-walled carbon nanotubes were placed in 50 ml of a strong acid solution of hydrochloric acid and nitric acid (3: 1), followed by reflux at 80 ° C. for 4 hours. This was again washed with distilled water several times to neutralize, filtered and dried at 100 ℃.

After dissolving 200 mg of copper nitrate in 50 ml of distilled water, 1 ml of ammonia water was added to prepare a precursor, and then 100 mg of pretreated carbon nanotube was added thereto, followed by stirring for 18 hours.

After stirring, the mixture was filtered, dried at 80 ° C., and then calcined in a reactor at 450 ° C. in a nitrogen atmosphere. After converting the copper particles into the form of an oxide, hydrogen was further injected at 250 ° C and treated for 8 hours to reduce and slowly cool the copper oxide to metal copper.

The prepared carbon nanotube-copper composite powder was mixed with 100 parts by weight of aluminum powder at 1 part by weight based on 100 parts by weight of aluminum powder, treated with ball milling for 10 hours, collected and chopped into a mold, and then sintered at 600 ° C. . In this step, a high frequency induction furnace was used.

The sintered carbon nanotube-aluminum composite material was extruded to obtain a shape, which was subjected to a tensile test. As shown in Table 1, the yield strength was 230Mpa, the maximum tensile strength was 270Mpa, and the elongation was 13%.

Example 2

5 g of multi-walled carbon nanotubes were placed in 50 ml of a strong acid solution of hydrochloric acid and nitric acid (3: 1), followed by reflux at 80 ° C. for 4 hours. This was again washed with distilled water several times to neutralize, filtered and dried at 100 ℃.

After dissolving 200 mg of copper nitrate in 50 ml of distilled water, 1 ml of ammonia water was added to prepare a precursor, and then 100 mg of pretreated carbon nanotube was added thereto, followed by stirring for 18 hours.

After stirring, the mixture was filtered, dried at 80 ° C., and then calcined in a reactor at 450 ° C. in a nitrogen atmosphere. After converting the copper particles into the form of an oxide, hydrogen was further injected at 250 ° C and treated for 8 hours to reduce and slowly cool the copper oxide to metal copper.

The prepared carbon nanotube-copper composite powder was mixed with 100 parts by weight of aluminum powder at 5 parts by weight based on 100 parts by weight of aluminum powder, treated with ball milling for 10 hours, collected and chopped into a mold, and then sintered at 600 ° C. . In this step, a high frequency induction furnace was used.

The sintered carbon nanotube-aluminum composite material was diluted to 1wt% in the molten die to obtain a shape by die casting, and the tensile test was performed. As shown in Table 1, the yield strength of 280Mpa, the maximum tensile strength of 390Mpa, and the elongation 8 % Results are shown.

Comparative Example 1

After mixing 5 g of the multi-walled carbon nanotubes and 500 g of aluminum powder, the mixture was processed by ball milling for 10 hours, collected, chopped into a mold, and sintered at 600 ° C. The sintered carbon nanotube-aluminum composite material was extruded to obtain a shape and tensile test. As shown in Table 1, yield strength of 190Mpa, maximum tensile strength of 230Mpa, and elongation of 11% were obtained.

Comparative Example 2

After mixing 5 g of the multi-walled carbon nanotubes and 500 g of aluminum powder, the mixture was processed by ball milling for 10 hours, collected, chopped into a mold, and sintered at 600 ° C. The sintered carbon nanotube-aluminum composite material was diluted to 1wt% in molten aluminum and die cast to obtain a shape. As shown in Table 1, yield strength 85Mpa, maximum tensile strength 120Mpa, elongation 9 % Results are shown.

Comparative Example 3

5 g of multi-walled carbon nanotubes, 0.26 g of copper powder, and 500 g of aluminum powder were mixed, treated with ball milling for 10 hours, collected, chopped, and sintered at 600 ° C. The sintered carbon nanotube-aluminum composite material was extruded to obtain a shape and tensile test. As shown in Table 1, the yield strength was 185Mpa, the maximum tensile strength was 225Mpa, and the elongation was 12%.

Comparative Example 4

5 g of multi-walled carbon nanotubes, 0.26 g of copper powder, and 500 g of aluminum powder were mixed, treated with ball milling for 10 hours, collected, chopped, and sintered at 600 ° C. The sintered carbon nanotube-aluminum composite material was diluted to 1wt% in the molten aluminum and die cast to obtain a shape. As shown in Table 1, yield strength 180Mpa, maximum tensile strength 210Mpa, elongation 8 % Results are shown.

(Table 1)

Yield strength (Mpa) Tensile strength (Mpa) Elongation (%) Example 1 230 270 13 Example 2 280 390 8 Comparative Example 1 190 230 11 Comparative Example 2 85 120 9 Comparative Example 3 185 225 12 Comparative Example 4 180 210 8

As can be seen in Table 1, in the case of comparative examples prepared by mechanically mixing aluminum and carbon nanotubes using a device such as ball milling, or by mixing carbon nanotubes, copper powder and aluminum powder all at once, carbon nano Compared to the embodiment of the present invention to prepare a tube-copper composite first, and then mixed with aluminum to produce a carbon nanotube-aluminum composite material, it can be seen that the yield strength, maximum tensile strength and elongation is low.

Through this, when prepared by the manufacturing method according to the present invention, it is possible to provide a carbon nanotube (CNT) -aluminum composite material having excellent properties by enhancing the dispersion of carbon nanotubes, oxidation and CNT that can occur in the case of the comparative example It can be seen that the problem of destruction of the present invention can be solved, and in the case of simple mixing as in the comparative example, the manufacture of the die casting method can be solved by the density difference between the carbon nanotubes and the aluminum.

FIG. 1 is an SEM image of Example 1 of the present invention, which illustrates copper particles chemically bonded to a carbon nanotube wall.

Claims (26)

a) preparing a carbon nanotube (CNT) -copper composite; b) mixing the carbon nanotubes (CNT) -copper composite and aluminum; And c) a method for producing a carbon nanotube (CNT) -aluminum composite material, comprising the step of sintering the mixture of step b). The method according to claim 1, The carbon nanotube of step a) is MWNT (multi wall nanotube), TWNT (Thin wall nanotube) or SWNT (single wall nanotube) characterized in that the manufacturing method of carbon nanotubes (CNT) -aluminum composite material. The method according to claim 1, Step a) is a1) preparing a carbon nanotube dispersion solution containing carbon nanotubes; a2) adding a copper acetate solution to the carbon nanotube dispersion solution prepared in step a1) and stirring the solution; a3) calcining the stirred solution in step a2) to obtain carbon nanotube (CNT) -copper oxide powder; And a4) reducing the carbon nanotubes (CNT) -copper oxide powder of step a3) to obtain the carbon nanotubes (CNT) -copper composite; Method of manufacturing the material. The method according to claim 3, Step a1), a11) acid treating the carbon nanotubes, and mixing and dispersing the carbon nanotubes in an acid solution; a12) refluxing the solution prepared in step a11); a13) filtering, washing, and drying the solution of step a12) to obtain a powder; And a14) a method of producing a carbon nanotube (CNT) -aluminum composite material, comprising the step of dispersing the powder of step a13) in distilled water or an organic solvent to obtain the carbon nanotube dispersion solution. The method according to claim 4, The acid solution used in step a11) is an acid solution containing at least one selected from nitric acid, sulfuric acid and hydrochloric acid. The method according to claim 4, The carbon nanotube (CNT) -aluminum composite material, characterized in that in the step a11) the carbon nanotubes are mixed with more than 0 ~ 5wt%, the acid solution is less than 95 ~ 100wt%. The method according to claim 4, In the step a14), the powder of step a13) is 0.01 ~ 1wt%, the carbon nanotube (CNT)-aluminum composite material manufacturing method characterized in that the distilled water or organic solvent is dispersed at 99 ~ 99.99wt% . The method according to claim 4, In the a11) step and the a2) step, the carbon nanotube (CNT) -aluminum composite material, characterized in that the stirring by ultrasonic treatment. The method according to claim 3, In the step a2), the carbon nanotube dispersion solution and the copper acetate so that the weight ratio of the carbon nanotubes contained in the carbon nanotube dispersion solution and the copper acetate solution is 99.99: 0.01-50: 50 Method for producing a carbon nanotube (CNT) -aluminum composite material, characterized in that the solution is mixed. The method according to claim 3, The content of copper in the solution stirred in step a2) is prepared from carbon nanotubes (CNT) -aluminum composite material, characterized in that 0.01 to 50wt% relative to the content of carbon nanotubes contained in the carbon nanotube dispersion solution. Way. The method according to claim 3, Before the step a3), further comprising the step of filtering and drying the solution stirred in step a2), In the step a3), the carbon nanotube (CNT) -aluminum composite material, characterized in that the firing in a nitrogen atmosphere. The method of claim 11, In the drying step the temperature conditions are 60 ~ 100 ℃, In the step a3), the temperature conditions are 300 ~ 500 ℃ carbon nanotube (CNT)-a method for producing a composite material. The method according to claim 3, In step a4), the carbon nanotube (CNT) -copper oxide powder of step a3) is heated in a mixed gas atmosphere containing hydrogen gas to reduce the carbon nanotube (CNT) -copper composite. Method for producing a carbon nanotube (CNT) -aluminum composite material. 14. The method of claim 13, The mixed gas includes a gas selected from argon gas, nitrogen gas, and a mixed gas of argon gas and nitrogen gas and the hydrogen gas, wherein the carbon nanotube (CNT) -aluminum composite material manufacturing method. The method according to claim 14, The carbon nanotubes (CNT) -aluminum composite material, wherein the gas selected from argon gas, nitrogen gas, and a mixture of argon gas and nitrogen gas is 70 to 96%, and the hydrogen gas is 4 to 30%. Manufacturing method. 14. The method of claim 13, The temperature condition of step a4) is a method of producing a carbon nanotube (CNT) -aluminum composite material, characterized in that 250 ~ 550 ℃. The method according to claim 1, In the carbon nanotube (CNT) -copper composite of step a), the content of carbon nanotubes is 50 to 99.99wt%, and the content of copper is 0.01 to 50wt%, carbon nanotubes (CNT) -aluminum. Method of manufacturing a composite material. The method according to claim 1, In the step b), based on 100 parts by weight of aluminum, the carbon nanotubes (CNT)-carbon nanotubes (CNT)-characterized in that the addition of 0.01 to 30 parts by weight based on 100 parts by weight of aluminum Method for producing aluminum composite material. The method according to claim 1, In the step a), carbon nanotubes (CNT) -copper composite is prepared in powder form, Before the step b) the aluminum further comprises the step of preparing in powder form, In the step b), the carbon nanotube (CNT) -copper composite powder and the aluminum powder, characterized in that for mixing the aluminum powder manufacturing method. The carbon nanotube (CNT) -copper composite of claim 1 is prepared in powder form. Preparing the aluminum as molten aluminum before the step b), In the step b), the carbon nanotube (CNT) -aluminum composite material, characterized in that for mixing the carbon nanotube (CNT) -copper composite powder to the molten aluminum. The method according to claim 1 The method of claim 1, wherein in the step a), the carbon nanotube (CNT) -copper composite is manufactured in the form of a sintered body, Preparing the aluminum as molten aluminum before the step b), In the step b), the carbon nanotube (CNT) -aluminum composite material manufacturing method characterized in that the carbon nanotube (CNT) -copper composite sintered body is mixed with the molten aluminum. The method according to claim 1, Before the step c), the method of manufacturing a carbon nanotube (CNT) -aluminum composite, characterized in that further comprising the step of ball milling the mixture of step b). The method according to claim 1, In the step c), the temperature condition is a carbon nanotube (CNT) -aluminum composite material manufacturing method, characterized in that 400 ~ 750 ℃. The method according to claim 1, In the step c), high-frequency induction heating or spark plasma sintering (sparking) manufacturing method of carbon nanotubes (CNT) -aluminum composite material. A carbon nanotube (CNT) -aluminum composite material prepared by the manufacturing method according to any one of claims 1 to 24. The carbon nanotube (CNT) -aluminum composite material according to claim 25, wherein the carbon nanotube (CNT) -aluminum composite material has a carbon nanotube content of 0.01 to 15 Wt%, a copper content of 0.001 to 15 Wt%, and an aluminum content of 70 to 99 Wt%. Carbon nanotubes (CNT) -aluminum composite material.

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