KR101343621B1 - Metal-carbon nanotube composite and preparing method of the same - Google Patents

Abstract

The present invention relates to a metal-carbon nanotube composite and a producing method thereof. The method for producing the metal-carbon nanotube composite comprises the steps of: combining carbon nanotubes and magnetic substances through a combining medium; and dispersing the carbon nanotubes inside a metal by combining the magnetic substances to the metal. The combining medium contains a radical initiator or a compound displayed at a chemical formula 1 (A-B). [Reference numerals] (AA) Combination medium;(BB) Metal;(CC) Carbon nanotube;(DD) Magnetic material;(EE) Metal-carbon nanotube composite

Description

Metal-Carbon Nanotube Composite and Method for Manufacturing the Same {METAL-CARBON NANOTUBE COMPOSITE AND PREPARING METHOD OF THE SAME}

The present application relates to a method for producing a metal-carbon nanotube composite, and a metal-carbon nanotube composite prepared by the method.

Low-dimensional nanomaterials composed of carbon atoms include fullerenes, carbon nanotubes, graphene, graphite, and the like. That is, when carbon atoms form a hexagonal array and become a ball, fullerene, which is a 0-dimensional structure, carbon nanotubes that are dried in one dimension, graphene when a layer of atoms in a two-dimensional phase, and graphite when stacked in three dimensions Can be distinguished.

Carbon nanotubes have a cylindrical structure in units of nanometers, and carbon atoms are arranged in a spiral shape to have specific properties that are difficult to find in conventional materials. Therefore, various application technologies have been developed in order to use excellent physical properties such as electrical properties, strength, recoverability, and thermal conductivity associated with such carbon nanotubes.

However, in general, single-walled carbon nanotubes are all surface atoms, so they are easily agglomerated by van der Waals forces between carbon nanotubes, and are often formed in a bundle or aggregate structure composed of a plurality of carbon nanotubes. In general, multi-walled carbon nanotubes also form a large aggregate in a net-entangled state.

Conventionally, as a method of dispersing carbon nanotubes in a solution, a physical dispersion treatment method such as ultrasonication has been proposed. In this physical dispersion treatment method, a single-walled carbon nanotube aggregate is placed in acetone, and the carbon nanotubes are dispersed in acetone by ultrasonication, or in addition to the ultrasonication, a substance such as a surfactant is added to a solvent to form carbon nanotubes. The method of improving the hydrophilicity of a tube, etc. are included. For example, Korean Patent Publication No. 2010-0051927 discloses an integrated grinding dispersion system capable of dispersing carbon nanotubes. However, such a conventional method of dispersing carbon nanotubes has not only a slight dispersing effect of carbon nanotubes, but also has limitations that cannot be applied to dispersing carbon nanotubes in a solvent such as metal. In particular, in dispersing carbon nanotubes in metals, there are difficulties due to the cohesion, hydrophobicity, very low volume density, and differences in specific gravity of carbon nanotubes and metals.

Conventional metal-carbon nanotube dispersion method, which introduces chemically hydroxyl groups on the surface of carbon nanotubes and induces covalent bonding of carbon nanotubes-metals through plasma melting or oxygen on the surface of carbon nanotubes. There was a method of introducing a functional group to be included using ultrasonic waves, but in this case there was a problem causing a defect of the carbon nanotubes.

The present application includes a carbon nanotube, a magnetic material, and a metal, wherein the carbon nanotube is bonded to the magnetic material through the coupling medium, and the carbon nanotube is dispersed in the metal by bonding the magnetic material to the metal. Metal-carbon nanotube complexes, and metal-carbon nanotubes comprising the steps of bonding the carbon nanotubes to the magnetic material using a coupling medium and dispersing the carbon nanotubes in the metal by bonding the magnetic material to the metal. It provides a method for producing a composite.

However, the problem to be solved by the present application is not limited to the above-mentioned problem, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A first aspect of the present invention, the step of coupling the carbon nanotubes and the magnetic material through a bonding medium; And dispersing the carbon nanotubes in the metal by binding the magnetic material to a metal, wherein the binding medium comprises a radical initiator or a compound represented by the following Chemical Formula 1, of the metal-carbon nanotube composite. A method of manufacture can be provided:

[Formula 1]

A-B

Wherein A is an organic functional group capable of bonding with carbon nanotubes, and B is an organic functional group capable of bonding with magnetic materials.

According to a second aspect of the present disclosure, carbon nanotubes, a magnetic body, and a metal, wherein the carbon nanotubes and the magnetic body are evenly dispersed in the metal, and are prepared by the method according to the first aspect of the present disclosure. Metal-carbon nanotube composites can be provided.

According to the present invention, a metal-carbon nanotube composite may be prepared by increasing affinity between carbon nanotubes and a molten metal using a coupling medium covalently bonded to a carbon material such as carbon nanotubes, and the carbon nanotubes may be made of metal. It is possible to provide a metal-carbon nanotube composite uniformly dispersed therein.

The metal-carbon nanotube composite prepared according to the present invention is more rigid because there is no structural defect in the carbon nanotubes, and unlike conventional technologies, carbon nanotubes are not required without adding a dispersant to the molten metal or applying an ultrasonic wave or a magnetic field. It can be added as it is to prepare a metal-carbon nanotube composite. As such, the metal in which the carbon nanotubes are evenly dispersed may be used as a light and strong metal composite material due to its excellent strength and the like.

Figure 1 is a schematic diagram showing the manufacturing process of the metal-carbon nanotube composite according to an embodiment of the present application.
Figure 2 is a scanning electron microscope (SEM) image of the metal-carbon nanotube composite according to an embodiment of the present application.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the same reference numbers are used throughout the specification to refer to the same or like parts.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

The terms "about "," substantially ", etc. used to the extent that they are used herein are intended to be taken as a reference to either the numerical value or to the numerical value when the manufacturing and material tolerance inherent in the stated meaning is presented, Accurate or absolute numbers are used to prevent unauthorized exploitation by unauthorized intruders of the mentioned disclosure. Also, throughout the present specification, the phrase " step "or" step "does not mean" step for.

Throughout this specification, when a member is " on " another member, it includes not only when the member is in contact with the other member, but also when there is another member between the two members.

Throughout this specification, the term “combination of these” included in the expression of the makushi form refers to one or more mixtures or combinations selected from the group consisting of constituents described in the expression of the makushi form, wherein the constituents It means to include one or more selected from the group consisting of.

Throughout this specification, "bonding mediator" is a material that induces chemical bonding of carbon nanotubes and a magnetic body without damaging the carbon nanotubes, and carbon nanotubes are formed by chemically bonding the carbon nanotubes and the magnetic body. It may include the role of efficiently dispersing in the metal.

Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the accompanying drawings.

A first aspect of the present invention, the step of coupling the carbon nanotubes and the magnetic material through a bonding medium; And dispersing the carbon nanotubes in the metal by binding the magnetic material to a metal, wherein the binding medium comprises a radical initiator or a compound represented by the following Chemical Formula 1, of the metal-carbon nanotube composite. A method of manufacture can be provided:

[Formula 1]

A-B

In the formula, A is an organic functional group capable of bonding with carbon nanotubes, and B is an organic functional group capable of bonding with magnetic materials.

1 is a schematic view showing a method of manufacturing a metal-carbon nanotube composite according to an embodiment of the present application. As shown in FIG. 1, the metal-carbon nanotube composite of the present application chemically bonds a magnetic material to a surface of a carbon nanotube using a coupling medium, and then uses the binding force to the metal of the magnetic material to form the carbon nanotube. It may be a metal, or a metal-carbon nanotube composite prepared by mixing with a molten metal.

For example, the magnetic material may include a transition metal oxide, but is not limited thereto.

In the method of manufacturing the metal-carbon nanotube composite, for example, after chemically attaching a magnetic material having a diameter of several nm or more to the surface of the carbon nanotube, the carbon nanotube and the metal melt are mixed and included in the magnetic material. The carbon nanotubes may be uniformly dispersed in the metal melt using the strong bonding property of the oxygen element and the metal, but the present invention is not limited thereto.

The manufacturing method of the metal-carbon nanotube composite may be performed under an inert gas atmosphere, for example, in order to prevent oxidation of carbon nanotubes, but is not limited thereto. For example, the inert gas may include, but is not limited to, a gas selected from the group consisting of nitrogen, argon, neon, helium, and combinations thereof.

When the magnetic material is a material containing oxygen atoms, the metal may theoretically include all metals capable of oxidation, but is not limited thereto. For example, even in the case of a metal which does not occur oxidation, the metal-carbon nanotube composite may be prepared by mixing with a carbon nanotube to which a magnetic body is bonded and physically stirring the metal.

For example, the binding medium may be carbonized and / or decomposed by high temperature during the manufacturing process of the metal-carbon nanotube composite, but is not limited thereto.

According to one embodiment of the present application, the metal is Ni, Co, Fe, Pt, Au, Al, Cr, Cu, Mg, Mn, Mo, Rh, Si, Ta, Ti, W, U, V, Zr, Ge And, and may include a metal or alloy containing one selected from the group consisting of, but is not limited thereto.

According to one embodiment of the present application, the metal may be in a molten state, but is not limited thereto.

According to one embodiment of the present application, the radical initiator may include one selected from the group consisting of peroxide-based polymerization initiator, azo-based polymerization initiator, redox-based polymerization initiator, and combinations thereof, but is not limited thereto. no.

According to one embodiment of the present application, the peroxide-based polymerization initiator is ammonium persulfate, potassium persulfate, sodium persulfate, 1,1-bis (tert-anilperoxy) cyclohexane, 1,1-di (t-amylper Oxy) cyclohexane, 1,1-bis (t-amylperoxy) cyclohexane, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t -Butyl peroxy) cyclohexane, 2,2-bis (t-butylperoxy) butane, 2,4-pentanedione oxide, 2,5-bis (t-butylperoxide) -2,5-dimethylhexane, 2,5-di (t-butylperoxide) -2,5-dimethyl-3-hexyne, 2-butanone peroxide, benzoyl peroxide, cumene hydroperoxide, di-t-amyl peroxide, dicumyl peroxide Oxides, lauroyl peroxide, luperox, t-butyl hydroperoxide, t-butyl peracetate, t-butyl peroxybenzoate, t-butyl peroxide, t-butylperoxy2-ethylhexyl carbonate, and these From the group consisting of Be one that comprises a compound that is chosen. However, without being limited thereto.

According to an embodiment of the present disclosure, the azo polymerization initiator is 1,1'-azobis (cyclohexane-1-carbonitrile), 2,2'-azobis (amidinopropane) dihydrochloride, 2,2 '-Azobis (2-methylbutyronitrile), 2,2'-azobisisobutyronitrile, 2,2'-azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile), 4,4'-azobis (4-cyanovaleric acid), dimethyl-2,2'-azobisisobutyrate, 2,2'-azo Bis [2- (2-imidazolin-2-yl) propane] dihydrochloride, 2,2'-azobis [2- (2-imidazolin-2-yl) propane], 2,2-azo It may include, but is not limited to, a compound selected from the group consisting of bis [2- (hydroxymethyl) propionitrile], and combinations thereof.

According to the exemplary embodiment of the present application, the organic functional group capable of bonding with the carbon nanotube may include an aromatic organic functional group, but is not limited thereto.

According to one embodiment of the present application, the organic functional group capable of bonding with the magnetic body may include one selected from the group consisting of carboxyl groups, aldehyde groups, hydroxy groups, epoxy groups, and combinations thereof, It is not limited to this.

According to one embodiment of the present application, the compound of Formula 1 may be an aromatic carboxylic acid, but is not limited thereto.

According to one embodiment of the present application, the aromatic carboxylic acid may include, but is not limited to, benzoic acid, phthalic acid, or salicylic acid. For example, the benzoic acid may be benzoic acid, the phthalic acid may be terephthalic acid or phthalic anhydride, and the phthalic anhydride may be di-butyl-pthalate or di-octyl-phthalate. psallate), the salicylic acid may be acetylsalicylic acid or methyl salicylate, but is not limited thereto.

According to one embodiment of the present application, the magnetic material may include a transition metal oxide, but is not limited thereto.

According to one embodiment of the present application, the transition metal oxide may be selected from the group consisting of iron oxide, cobalt oxide, nickel oxide, chromium oxide, magnetite, and combinations thereof, but is not limited thereto.

According to one embodiment of the present application, the size of the magnetic material may be about 1 nm to about 50 nm, but is not limited thereto. For example, the size of the magnetic material is about 1 nm to about 50 nm, about 3 nm to about 50 nm, about 5 nm to about 50 nm, about 10 nm to about 50 nm, about 20 nm to about 50 nm, about 30 nm to about 50 nm, about 40 nm to about 50 nm, about 1 nm to about 40 nm, about 1 nm to about 30 nm, about 1 nm to about 20 nm, about 1 nm to about 10 nm, about 1 nm To about 7 nm, about 1 nm to about 5 nm, about 1 nm to about 3 nm, or about 3 nm to about 10 nm, but is not limited thereto.

According to an embodiment of the present disclosure, the coupling of the carbon nanotubes and the magnetic material through the coupling medium may include combining about 0.1 parts by weight to about 20 parts by weight of the magnetic material with respect to about 1 part by weight of the carbon nanotubes. It may be, but is not limited thereto. For example, combining the carbon nanotubes with the magnetic material through the coupling medium may include about 0.1 parts by weight to about 20 parts by weight and about 0.5 parts by weight to about 20 parts by weight of the magnetic material based on about 1 part by weight of the carbon nanotubes. Parts by weight, about 1 part by weight to about 20 parts by weight, about 2 parts by weight to about 20 parts by weight, about 5 parts by weight to about 20 parts by weight, about 10 parts by weight to about 20 parts by weight, about 0.1 parts by weight to about 10 parts by weight Parts by weight, about 0.1 parts by weight to about 5 parts by weight, about 0.1 parts by weight to about 2 parts by weight, about 0.1 parts by weight to about 1 parts by weight, about 0.1 parts by weight to about 0.5 parts by weight, or about 2 parts by weight to about It may include, but is not limited to, combining 5 parts by weight.

According to one embodiment of the present disclosure, dispersing the carbon nanotubes in the metal may include dispersing 1 part by weight of the carbon nanotubes in about 1 part by weight to about 500,000 parts by weight of the metal. It is not limited. For example, dispersing the carbon nanotubes in the metal may include about 1 part by weight of the carbon nanotubes, about 1 part by weight to about 500,000 parts by weight, about 1 part by weight to about 100,000 parts by weight, and about 1 part by weight. To about 50,000 parts by weight, about 1 to about 10,000 parts by weight, about 1 to about 5,000 parts by weight, about 1 to about 1,000 parts by weight, about 1 to about 500 parts by weight, about 1 part by weight To about 100 parts by weight, about 1 to about 50 parts by weight, about 1 to about 10 parts by weight, about 1 to about 5 parts by weight, about 1 to about 3 parts by weight, about 3 parts by weight To about 500,000 parts by weight, about 5 to about 500,000 parts by weight, about 10 to about 500,000 parts by weight, about 20 to about 500,000 parts by weight, about 50 to about 500,000 parts by weight, about 100 parts by weight To about 500,000 parts by weight, about 500 parts by weight to about 500,000 parts by weight, about 1,000 parts by weight to about 500,000 parts by weight, about 5,000 parts by weight to about 500,000 parts by weight, about 10,000 parts by weight to about 500,000 parts by weight, about 50,000 parts by weight to about 500,000 parts by weight, about 100,000 parts by weight to about 500,000 parts by weight, or And about 10 parts by weight to about 50 parts by weight, but is not limited thereto.

According to an embodiment of the present disclosure, the coupling of the carbon nanotubes and the magnetic material through the coupling medium may include preparing a mixture including the carbon nanotubes, the magnetic material, and the coupling medium, and stirring the mixture. By using the carbon nanotubes and the magnetic material may be coupled to the reaction, but is not limited thereto.

According to a second aspect of the present disclosure, carbon nanotubes, a magnetic body, and a metal, wherein the carbon nanotubes and the magnetic body are evenly dispersed in the metal, and are prepared by the method according to the first aspect of the present disclosure. Metal-carbon nanotube composites can be provided.

The metal-carbon nanotube composite of the present application, in order to evenly disperse the carbon nanotubes and the metal which are different in specific gravity and do not mix well, by combining the carbon nanotubes with the magnetic material through a coupling medium, the carbon nanotubes The carbon nanotubes may be dispersed in the metal by making the specific gravity of the metal similar to the metal and bonding the carbon nanotubes to the metal by using a bonding force between the magnetic material and the metal bonded to the carbon nanotubes. It is not limited. For example, the bonding medium that can be used to bond the carbon nanotubes and the magnetic material in the manufacturing process of the metal-carbon nanotube composite is carbonized at a high temperature that can be applied during the manufacturing process of the metal-carbon nanotube composite. And / or may be substantially free of decomposition of the metal-carbon nanotube composite finally prepared.

For example, the metal-carbon nanotube composite of the present invention is a metal-carbon nanotube composite prepared by chemically bonding a magnetic body, for example, magnetic particles, to a surface of a carbon nanotube and then mixing it with a metal or molten metal. It may be, but is not limited thereto. For example, the metal in which the carbon nanotubes are dispersed may be light and have strong strength. For example, when the metal is aluminum, the metal-carbon nanotube composite in which about 3% (v / v) of carbon nanotubes are dispersed in aluminum has about three times more strength than pure aluminum, and other aluminum It may have about 1.5 times more strength than the alloy.

When the magnetic material is a material containing oxygen atoms, the metal may theoretically include all metals capable of oxidation, but is not limited thereto.

For example, the magnetic material may include magnetic particles, but is not limited thereto.

Carbon nanotubes in which the magnetic particles are chemically bonded may have a specific gravity similar to that of a metal, but is not limited thereto. For example, the carbon nanotubes to which the magnetic particles are chemically bonded may be evenly dispersed in the metal or the molten metal since the specific gravity thereof is similar to the specific gravity of the metal so that phase separation does not occur, but is not limited thereto.

For example, the radical initiator may include, but is not limited to, a functional group selected from the group consisting of carboxyl groups, aldehyde groups, hydroxy groups, epoxy groups, and combinations thereof.

The radical initiator may be used to chemically bond the transition metal oxide to the surface of the carbon nanotubes. The radical electrons included in the radical initiator may be covalently bonded to an electron having a P orbital function on the surface of the carbon nanotubes. The carboxyl group, which is an organic functional group capable of bonding with the magnetic body, included in the radical initiator, forms an electrical bond with a transition metal oxide such as, for example, magnetite. For example, the transition metal oxide may include oxygen combined with a metal such as iron, nickel, cobalt, and the like, and oxygen included in the transition metal oxide may be an oxidative metal including aluminum. Because of the strong bonding can form a metal-carbon nanotube composite, but is not limited thereto. The carbon nanotubes included in the metal-carbon nanotube composite prepared as described above do not change in basic physical properties, thereby making it possible to manufacture high strength metals or metal alloys.

In the compound of Chemical Formula 1, A, which is an organic functional group capable of bonding with the carbon nanotubes, may be, for example, those that bond with the pi orbital electrons of the carbon nanotubes through π-π stacking, but are not limited thereto. It is not. In the compound of Formula 1, B, which is an organic functional group capable of bonding with the magnetic body, may be, for example, electrostatically bonding with the magnetic particles, but is not limited thereto.

According to one embodiment of the present application, the metal is Ni, Co, Fe, Pt, Au, Al, Cr, Cu, Mg, Mn, Mo, Rh, Si, Ta, Ti, W, U, V, Zr, Ge And, and may include a metal or an alloy selected from the group consisting of, but is not limited thereto.

According to the exemplary embodiment of the present application, the metal-carbon nanotube composite may include about 0.1 parts by weight to about 20 parts by weight of the magnetic material with respect to about 1 part by weight of the carbon nanotubes, but is not limited thereto. no. For example, the metal-carbon nanotube composite may include about 0.1 parts by weight to about 20 parts by weight, about 0.5 parts by weight to about 20 parts by weight, and about 1 part by weight of the magnetic material based on 1 part by weight of the carbon nanotubes. To about 20 parts by weight, about 2 parts by weight to about 20 parts by weight, about 5 parts by weight to about 20 parts by weight, about 10 parts by weight to about 20 parts by weight, about 0.1 parts by weight to about 10 parts by weight, about 0.1 parts by weight To about 5 parts by weight, about 0.1 parts by weight to about 2 parts by weight, about 0.1 parts by weight to about 1 parts by weight, about 0.1 parts by weight to about 0.5 parts by weight, or about 2 parts to about 5 parts by weight. However, it is not limited thereto.

According to the exemplary embodiment of the present disclosure, the metal-carbon nanotube composite may include, but is not limited to, about 1 part by weight to about 500,000 parts by weight of the metal, based on 1 part by weight of the carbon nanotubes. . For example, the metal-carbon nanotube composite may include about 1 part by weight to about 500,000 parts by weight, about 1 part by weight to about 100,000 parts by weight, and about 1 part by weight based on 1 part by weight of the carbon nanotubes. To about 50,000 parts by weight, about 1 part by weight to about 10,000 parts by weight, about 1 part by weight to about 5,000 parts by weight, about 1 part by weight to about 1,000 parts by weight, about 1 part by weight to about 500 parts by weight, about 1 part by weight To about 100 parts by weight, about 1 to about 50 parts by weight, about 1 to about 10 parts by weight, about 1 to about 5 parts by weight, about 1 to about 3 parts by weight, about 3 parts by weight To about 500,000 parts by weight, about 5 parts by weight to about 500,000 parts by weight, about 10 parts by weight to about 500,000 parts by weight, about 20 parts by weight to about 500,000 parts by weight, about 50 parts by weight to about 500,000 parts by weight, about 100 parts by weight To about 500,000 parts by weight, about 500 parts by weight to about 500,000 parts by weight, about 1,000 parts by weight About 500,000 parts by weight, about 5,000 parts by weight to about 500,000 parts by weight, about 10,000 parts by weight to about 500,000 parts by weight, about 50,000 parts by weight to about 500,000 parts by weight, about 100,000 parts by weight to about 500,000 parts by weight, or about 10 parts by weight To about 50 parts by weight, but is not limited thereto.

Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto.

[ Example ]

In this embodiment, a multi-walled carbon nanotube (MWCNT, Nanocyl) having a diameter of about 10 nm to about 13 nm was used as the carbon nanotube. Magnetite was prepared and used directly using the first ferric chloride aqueous solution, the second ferric chloride aqueous solution, and ammonia water, and an average diameter of about 5 nm was used. Aluminum powders (AAL-10SF, AAL-30SF, Changsung Co., Ltd.) were used having a diameter of about 4 μm to about 10 μm and a diameter of about 15 μm to about 25 μm, respectively. Aluminum flux (ASSTY (AF-1), JC Co., Ltd.) was used as an aluminum melt, and an average particle size of about 6 μm to about 12 μm was used. 4,4-azobis (4-cyanovaleric acid), v-501 , Aldrich] was used as a radical initiator.

In this example, in each melting experiment, 20 g of aluminum powder, 2 g of aluminum flux, and 3 g of carbon nanotubes to which magnetic particles were attached were used, and a radical initiator was used in twice the weight ratio of carbon nanotubes. It became.

First, magnetite, a magnetic particle, was attached to the surface of the carbon nanotube using a radical initiator, and 2 g of a radical initiator was dissolved in 1 L of distilled water, and then 1 g of carbon nanotube was added thereto for 10 hours. After stirring, the mixture was slowly stirred. Then, 3 g of magnetite was added thereto, followed by stirring for about 30 minutes to attach the magnetite to the surface of the carbon nanotubes.

Subsequently, 3 g of the magnetite-attached carbon nanotubes and 20 g of aluminum powder were mixed well and placed in a 20 ml ceramic crucible, which was then covered with 2 g of aluminum flux and inserted into a heating furnace. Nitrogen gas was supplied through an air line at the top of the reactor so that oxygen was not mixed in the heating furnace, and the temperature was raised to about 620 ° C. to 650 ° C., and then heated for about 30 minutes. In this process, the radical initiator attaching the magnetite to the carbon nanotubes is carbonized and decomposed into carbon molecules. Thereafter, the heating of the furnace was stopped, nitrogen was continuously supplied, and the temperature of the furnace was lowered to room temperature, and the ceramic crucible was crushed to recover an aluminum alloy mass. The recovered aluminum alloy was cut using a metal cutting saw, and then the cross section was observed with a scanning electron microscope (SEM) to check whether the carbon nanotubes were well dispersed.

The scanning electron microscope analysis results are shown in FIGS. 2A and 2B. Figure 2a is an image of a composite made of carbon nanotubes and aluminum without magnetite attached, Figure 2b is an image of a composite made of carbon nanotubes and aluminum with magnetite attached. As a result, as shown in FIG. 2A, no carbon nanotubes were found inside the aluminum mass in which the carbon nanotubes without magnetite were dispersed, which appeared to float to the top of the aluminum melt when melted at a high temperature. It was analyzed because it is not dispersed in aluminum. On the other hand, as shown in FIG. 2B, the carbon nanotubes mixed in the molten aluminum were found inside the aluminum lumps in which the carbon nanotubes with magnetite were dispersed.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .

Claims (19)

Coupling the carbon nanotubes with the magnetic material through a coupling medium; And
Dispersing the carbon nanotubes in the metal by bonding the magnetic material to a metal,
Wherein the binding medium comprises a radical initiator or a compound represented by the following formula (1),
Method for preparing metal-carbon nanotube composites:
[Chemical Formula 1]
AB
Wherein A is an organic functional group capable of bonding with carbon nanotubes, and B is an organic functional group capable of bonding with magnetic materials.
The method of claim 1,
The metal is Ni, Co, Fe, Pt, Au, Al, Cr, Cu, Mg, Mn, Mo, Rh, Si, Ta, Ti, W, U, V, Zr, Ge, and combinations thereof Method for producing a metal-carbon nanotube composite comprising a metal or an alloy containing one selected from the group consisting of.
The method of claim 1,
The metal is in a molten state, a method for producing a metal-carbon nanotube composite.
The method of claim 1,
Wherein the radical initiator comprises one selected from the group consisting of peroxide-based polymerization initiators, azo-based polymerization initiators, redox-based polymerization initiators, and combinations thereof.
5. The method of claim 4,
The peroxide-based polymerization initiator is ammonium persulfate, potassium persulfate, sodium persulfate, 1,1-bis (tert-anilperoxy) cyclohexane, 1,1-di (t-amylperoxy) cyclohexane, 1,1 -Bis (t-amylperoxy) cyclohexane, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t-butylperoxy) cyclohexane, 2,2-bis (t-butylperoxy) butane, 2,4-pentanedione oxide, 2,5-bis (t-butylperoxide) -2,5-dimethylhexane, 2,5-di (t- Butyl peroxide) -2,5-dimethyl-3-hexyne, 2-butanone peroxide, benzoyl peroxide, cumene hydroperoxide, di-t-amyl peroxide, dicumyl peroxide, lauroyl peroxide, loupe From the group consisting of lox, t-butyl hydroperoxide, t-butyl peracetate, t-butyl peroxybenzoate, t-butyl peroxide, t-butylperoxy-2-ethylhexyl carbonate, and combinations thereof Containing the selected compound Will, metal-carbon nanotube composite production method.
5. The method of claim 4,
The azo polymerization initiator is 1,1'-azobis (cyclohexane-1-carbonitrile), 2,2'-azobis (amidinopropane) dihydrochloride, 2,2'-azobis (2-methyl Butyronitrile), 2,2'-azobisisobutyronitrile, 2,2'-azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (4-methoxy-2, 4-dimethylvaleronitrile), 4,4'-azobis (4-cyanovaleric acid), dimethyl-2,2'-azobisisobutyrate, 2,2'-azobis [2- (2-imi Dazolin-2-yl) propane] dihydrochloride, 2,2'-azobis [2- (2-imidazolin-2-yl) propane], 2,2-azobis [2- (hydroxymethyl ) Propionitrile], and a compound selected from the group consisting of a combination thereof, a method for producing a metal-carbon nanotube composite.
The method of claim 1,
The organic functional group capable of bonding with the carbon nanotubes will include an aromatic organic functional group, a method for producing a metal-carbon nanotube composite.
The method of claim 1,
The organic functional group that can be bonded to the magnetic body comprises a one selected from the group consisting of carboxyl group, aldehyde group, hydroxy group, epoxy group, and combinations thereof, method of producing a metal-carbon nanotube composite .
The method of claim 1,
The compound of Formula 1 is an aromatic carboxylic acid containing method of producing a metal-carbon nanotube composite.
10. The method of claim 9, wherein the aromatic carboxylic acid comprises benzoic acid, phthalic acid, or salicylic acid.
The method of claim 1,
The magnetic material will include a transition metal oxide, metal-carbon nanotube composite manufacturing method.
The method of claim 11,
The transition metal oxide is iron oxide, cobalt oxide, nickel oxide, chromium oxide, magnetite, and the one comprising a combination consisting of a combination thereof, the method of producing a metal-carbon nanotube composite.
The method of claim 1,
The size of the magnetic material is 1 nm to 50 nm, the method of producing a metal-carbon nanotube composite.
The method of claim 1,
Coupling the carbon nanotubes and the magnetic material through the binding medium, the magnetic material with respect to 1 part by weight of the carbon nanotubes, comprising the combination of 0.1 to 20 parts by weight of the metal-carbon nanotube composite Manufacturing method.
The method of claim 1,
Dispersing the carbon nanotubes in the metal, 1 part by weight of the carbon nanotubes comprises dispersing in 1 part by weight to 500,000 parts by weight of the metal, carbon-tube nanotube composite manufacturing method.
The method of claim 1,
Coupling the carbon nanotubes and the magnetic material through the binding medium,
Preparing a mixture comprising the carbon nanotubes, the magnetic material, and the binding medium, and
Stirring the mixture to react the carbon nanotubes with the magnetic material
To include, Method for producing a metal-carbon nanotube composite.
Including carbon nanotubes, magnetic materials, and metals,
The carbon nanotubes and the magnetic material are evenly dispersed in the metal, it is prepared by the method according to any one of claims 1 to 16,
Metal-carbon nanotube composites.
The method of claim 17,
The metal-carbon nanotube composite of 1 to 20 parts by weight of the magnetic material, based on 1 part by weight of the carbon nanotubes.
The method of claim 17,
The metal-carbon nanotube composite of 1 to 500,000 parts by weight of the metal, based on 1 part by weight of the carbon nanotubes.

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