KR20130106146A - Preparing method of carbon nanotubes-carbon fibers hybrid fillers - Google Patents

Abstract

PURPOSE: A manufacturing method of carbon nanotubes-carbon fiber hybrid filler is provided to improve the strength of the carbon nanotubes-carbon fiber hybrid filler. CONSTITUTION: A manufacturing method of a carbon nanotubes-carbon fiber hybrid filler comprises a step of acid-treated carbon fiber and coating the carbon fiber by an electrical/chemical method; a step of heat-treating the metal catalyst coating-treated carbon fiber under an inactive atmosphere; and a step of directly synthesizing carbon nanotubes on the heat-treated metal coating carbon fiber by using hydrocarbon synthetic gas. High carbon-containing material is used as the carbon fiber. The metal content coated on the carbon fiber is 1.0-20 wt%.

Description

Preparation method of carbon nanotubes-carbon fibers hybrid fillers

The present invention relates to a method for producing a carbon nanotube-carbon fiber hybrid filler. More specifically, in preparing a hybrid filler by directly growing carbon nanotubes on a carbon fiber surface, a coating method of a catalyst for carbon nanotubes on a carbon fiber surface, a post-coating catalyst post-treatment method, carbon nanotube growth conditions, and The present invention relates to improved mechanical properties of composite materials, hydrogen storage media, carbon dioxide storage media, electrode materials for electrochemical capacitors, filler materials for heat dissipation composites, and electromagnetic wave shielding composites.

Recently, there is an increasing demand for composite materials requiring extreme physical properties in various fields. Therefore, it is spurring the development of composite materials reinforced with high strength industrial fibers such as carbon fibers. However, as the demand for ultra-high mechanical properties exceeding the mechanical properties of traditional fiber reinforced composites reinforced with single fibers such as carbon fiber, glass fiber and Kevlar fiber increases, the nano / micros are added to the properties of nanocomposites. Development of a composite material using a hybrid filler is being made.

To this end, nanoparticles (carbon black, titanium oxide, nanometal fine particles, etc.) are mixed with a fiber-based filler having a micro diameter such as carbon fiber or nanofibers (carbon nanofibers, carbon nanotubes, ceramic nanofibers, metal nanofibers, etc.). The development of composite materials that blends the mechanical system of the existing single reinforced composite materials greatly exceeds the mechanical properties.

However, in the case of the composite material using the heterogeneous filler, the nano-pillars are not easily dispersed due to the difference in scale between micro and nano, and thus, theoretically calculated mechanical properties cannot be reached. Therefore, the development of various highly dispersed nanocomposites has been attempted several times, but in this case, an additional method of surface treatment has to be added, which has the disadvantage of economic cost increase.

Therefore, a method for fundamentally solving the problem is the development of a composite material using a filler material manufactured by a method of hybridizing a filler having a nano size to a filler material having a micro size.

Since this method does not need to consider the dispersion of nanofiller, it can induce higher strength properties than conventional methods. Such a material is manufactured by physically coating a binder material on a surface of a conventional microsized filler and then coating the nanofiller again. However, this method has a large problem of interfacial separation because of the use of a third material called a binder, and the coating is physically performed, so that the coated nanofiller is separated in a processing method that receives a large shear force during molding such as injection molding. I still have

Therefore, there is a need for a method of manufacturing a new micro-nano hybrid filler material that overcomes the limitations of the physical coating method. In the present invention, a method for producing a micro-nano hybrid filler was developed by directly growing carbon nanotubes on a carbon fiber surface based on carbon fibers. This method is physically and chemically bonded to carbon fibers (micro fillers) and carbon nanotubes (nano fillers), and because it does not use a binder material, it has a high resistance to shear force and thus has a problem of high dispersion and high adhesion. All will be satisfied.

Therefore, the present inventors have made efforts to increase the dispersion force of carbon nanotubes and adhesion with carbon fibers based on the existing carbon fibers, and as a result, the production of carbon nanotube-carbon fiber hybrid fillers capable of inducing high-strength mechanical properties It is confirmed that the composite material using this material has higher physical properties than the composite material made of the combination of simple carbon fiber and carbon nanotube, and the electrode material for electrochemical capacitor, electrode material for hydrogen storage, and carbon dioxide storage It was confirmed that the material, the heat dissipating composite material, and the electromagnetic wave shielding composite material showed excellent performance, and completed the present invention.

It is a main object of the present invention to provide a method for producing a micro-nano hybrid filler by directly growing carbon nanofibers or tubes having a nano diameter on a carbon fiber surface having a micro diameter. In addition, carbon nanotube-carbon fiber hybrid fillers can be used for hybrid filler reinforcement composite materials having high strength mechanical properties, electrochemical capacitor electrodes, hydrogen storage electrodes, carbon dioxide storage materials, heat dissipation composite materials, and electromagnetic shielding composite materials. to provide.

In order to achieve the above object, the present invention is coated with a catalyst for synthesizing carbon nanotubes on the surface of the carbon fiber by electrochemical method, and after the post-treatment, the carbon nanotubes directly on the surface of the carbon fiber It provides a method for producing a micro-nano hybrid (carbon fiber-carbon nanotube hybrid) filler synthesized in the present invention.

The present invention is also prepared according to the above method, and is provided as a filler for a high strength composite material, an electrode material for electrochemical capacitors, an electrode material for hydrogen storage, a carbon dioxide storage material, a filler material for a heat dissipating composite, and a filler material for electromagnetic shielding.

The present invention has the effect of providing a high mechanical strength compared to the conventional commercialized single carbon fiber composite, single carbon nanotube composite, and carbon nanotube / carbon fiber simple composite composite.

In addition, there is an effect of providing a high performance as an electrode material for electrochemical capacitors, electrode material for hydrogen storage, carbon dioxide storage material, electromagnetic shielding material, heat radiation filler material.

The carbon nanotube-carbon fiber hybrid filler prepared according to the present invention may not only be useful for a composite material having high strength mechanical properties, but also may be useful as a filler for various energy storage and absorption composite materials. Therefore, the prepared carbon nanotube-carbon fiber hybrid filler is a storage medium for high pressure / room temperature hydrogen storage, a gaseous carbon dioxide storage medium, a cathode and an anode material for an electrochemical capacitor, a filler material for a heat dissipating composite, a filler for an electromagnetic shielding composite material It is expected to create high added value that can be applied to various fields such as catalyst carrier for material and exhaust branch purification.

1 is a step of manufacturing a hybrid filler according to the present invention
2 is a SEM photograph of an embodiment of a hybrid filler according to the present invention; (c) Example 3, (d) Enlargement of Example 3, (e) Example 4, (f) Enlargement of Example 4, (g) Example 5, (h) Enlargement of Example 5
3 is a TEM picture of a hybrid filler according to the present invention; (a) TEM image of carbon nanotube layer, (b) Partial magnification of (a) to observe tube shape
Figure 4 is a principle of increasing physical properties compared to a simple compound filler when manufacturing a composite material using a hybrid filler according to the present invention

Hereinafter, the present invention will be described in detail.

The present invention is a hybrid filler in which nano-sized carbon nanotubes are directly grown on a surface of a micro diameter carbon fiber, and include a filler material for a high performance composite, an electrode material for an electrochemical capacitor, a hydrogen storage medium, a carbon dioxide storage medium, and a filler material for a heat dissipating composite. It provides a method for producing a filler material for electromagnetic wave shielding composite material.

Specifically, the present invention (1) the carbon fiber in distilled water and the water shielding wash; (2) acid-treated the prepared carbon fiber at room temperature to remove foreign substances on the surface; (3) metal catalyst coating the acid treated carbon fiber; (4) heat treating the metal catalyst coated carbon fiber at high nitrogen (N 2) atmosphere in a tubular furnace; (5) characterized in that it comprises the step of synthesizing carbon nanotubes by using the heat-treated carbon fiber in a tubular furnace under a argon (Ar) atmosphere as a hydrocarbon gas as a synthesis gas. A detailed description of each of these steps follows.

In the present invention, it is preferable to use polyacrylonitrile (PAN) and pitch-based fibers as the carbon fibers, and the tow number of the carbon fibers can be any kind. Prior to coating the metal catalyst, carbon fiber is preferably treated at least three times in distilled water, at least 3M in nitric acid (HNO 3), hydrochloric acid (HCl) or sulfuric acid (H 2 SO 4) solution for at least 30 minutes to completely remove foreign substances on the surface.

Acid-treated carbon fiber is preferably repeated three or more times stirring 12 to 24 hours using ethanol again, the washed carbon fiber is completely dried for 6 to 24 hours, preferably 12 hours at 80 ℃ or more It is preferable.

The acid treatment and washing process is to completely remove the amorphous carbon and the sizing polymer and the like present in the carbon fiber, excessive acid treatment is not preferable because it can disrupt the structure of the carbon fiber itself.

Metal catalyst coating of the carbon fiber may be a variety of metals, such as iron (Fe), copper (Cu), nickel (Ni), silver (Ag) and tin (Sn). However, in order to precisely control the synthesis of carbon nanotubes, it is preferable to use nickel (Ni). However, the scope of the present invention is not limited to nickel.

Metal catalyst coating of carbon fibers is equally possible in both electrical and chemical ways. When using an electrical method, the lower the current density is, the better. This is because when the current density is high, the particles of the coated metal become larger and do not participate in the synthesis of carbon nanotubes. Preferred current densities are 5 A / m 2 at 0.1 A / m 2. In the electric metal catalyst coating method, carbon fiber is used as a cathode, and a metal plate to be coated is used as an anode, the same metal salt is used as an electrolyte, and then the current density is fixed and coating is performed with a variable time. At this time, as the plating time increases, the amount of the metal to be coated increases. The amount of metal is preferably about 1.0 wt.% To 20 wt.% So as to be suitable for synthesizing carbon nanotubes. It is too small a carbon nanotube synthesis amount is too small to meet the object of the present invention, if too large a coating, the carbon nanotube synthesis is excessive, the carbon nanotube layer is peeled off between the carbon nanotube-carbon fiber This can lead to a decrease in adhesion.

On the other hand, the particle diameter of the metal catalyst is preferably about 1 nm to 10 nm to facilitate the synthesis of carbon nanotubes. This hinders the synthesis of carbon nanotubes in the case of too small particles, and the nanotubes themselves are not synthesized in too large particle diameters.

In the case of the chemical method, the metal coating layer is mainly formed in the form of NiP or NiB. At this time, it is desirable to minimize the amount of complexing agent such as P and B. In the case of the metal catalyst through the chemical method, regardless of the plating conditions, the size of the nickel particles is preferably between 1 nm and 10 nm, and the total metal catalyst amount is preferably 1.0 wt.% To 20 wt.%.

Since the heat treatment process after the metal catalyst coating plays a very important role in removing the foreign matter remaining in the metal coating layer and minimizing the oxide layer on the surface, it is preferable to proceed. The heat treatment is preferably carried out under the same nitrogen (N 2) atmosphere in both the electrically and chemically coated carbon fibers. The treatment time is preferably about 30 minutes to 2 hours, and the treatment temperature is preferably about 150 to 400 degrees Celsius. This is because foreign matters of the metal catalyst layer are not easily removed under too low or too short heat treatment conditions, and too high or long heat treatment conditions have a negative effect on the synthesis of carbon nanotubes because the metals of the metal catalyst layers merge with each other. On the other hand, the flow rate of the nitrogen atmosphere is preferably carried out at 50 cc / min or more conditions. This is because a condition is formed to sufficiently fill the inside of the tube furnace.

The metal-coated carbon fiber heat-treated for the synthesis of carbon nanotubes after the metal treatment is placed in a predetermined amount of the tube furnace to maintain an argon (Ar) atmosphere at room temperature. After raising the temperature to the carbon nanotube synthesis temperature, the supply of argon was cut off and the hydrocarbon gas, which is a synthesis gas, was flown. The reaction time gives sufficient time for the carbon nanotubes to be synthesized. The reaction temperature for the synthesis of carbon nanotubes is preferably about 650 to 1200 degrees Celsius. Argon gas input amount is preferably about 50 cc / min to 2 L / min. The reaction time is preferably about 0.5 to 10 minutes. Preferred types of hydrocarbons include methane (CH4) and ethylene (C2H4) gas, but the present invention is not limited to these two types. The injection amount of the reaction gas is preferably about 500 cc / min to about 5 L / min.

When the composite material is prepared using the carbon fiber-carbon nanotube hybrid filler prepared according to the above method, 5% to 20% compared to the composite material prepared by the simple compound of the same amount of carbon fiber and carbon nanotubes. It is characterized by having higher mechanical properties than%. In addition, when applied as a material for storing hydrogen, it has a hydrogen storage amount of 0.5 wt.% To 3 wt.% Under the measurement conditions of room temperature / 100 atm. In the storage of carbon dioxide, it is characterized by a storage amount of 5 wt.% To 30 wt.% Under the conditions of room temperature / 30 atmospheres. In addition, when used as an electrode material for an electrochemical capacitor, it characterized in that the filling amount of 5 F / g to 100 F / g. When used as a heat dissipation material when the epoxy base is filled in 50 wt.% Characterized in that the heat dissipation value of 3 W / mK to 20 W / mK. When applied as a filler of the electromagnetic wave shielding composite, it is characterized by exhibiting an electromagnetic shielding rate of 10 dB to 40 dB when 30 wt.% Is filled based on the polypropylene matrix.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these examples are for illustrative purposes only and that the scope of the present invention is not construed as being limited by these examples.

Measurement Example 1. Analysis of coating amount of carbon fiber metal catalyst

In order to analyze the metal coating amount of the carbon fiber coated with the prepared metal catalyst, it was calculated as the metal weight to carbon fiber weight by AAS (atomic absorption spectrophotometry), and the notation was expressed as wt.%.

Measurement Example 2 Carbon Fiber Metal Catalyst Size Analysis

Wide-angle X-ray diffraction analysis was performed to analyze the size of metal particles of the prepared carbon-coated carbon fiber, and the scan range using Rigaku Model D / Max-III B analysis equipment equipped with CuK 5 to 80o and scan rate 4o / min. In addition, the particle size was analyzed using the Scherrer equation through the obtained X-ray diffraction analysis.

Measurement Example 3 Weight of Carbon Nanotubes Coated on Carbon Fiber

In order to measure the weight of the carbon nanotubes grown directly on the carbon fibers, the weight of the carbon nanotubes was measured by precisely measuring the weight of the hybrid filler after coating the carbon nanotubes with respect to the weight of the carbon fibers coated with the metal catalyst.

Measurement Example 4 Measurement of Mechanical Strength of Composite Material Using Hybrid Filler

An epoxy resin composite material containing 50% (volume fraction) of the prepared hybrid filler was prepared, and a three-point bending test was performed using a universal testing machine (UTM). The cross-head-speed was 2 mm / min and the sample size was 5 mm in width, 50 mm in length, and 5 mm in thickness. A total of 10 samples were prepared and the average value was taken.

Measurement Example 5 Determination of Hydrogen Storage of Hybrid Filler

In order to measure the hydrogen storage amount of the prepared hybrid filler, each sample was degassed for 6 hours while maintaining the residual pressure at 10-3 torr or less at 373K, and then 298K and 100 atm conditions using BEL-HP (BEL Japan). The hydrogen storage amount was measured at. The hydrogen storage measurement method was a step-by-step method, and the average amount of samples was 0.1 g.

Measurement Example 6. Measurement of Carbon Dioxide Storage of Hybrid Filler

In order to measure the carbon dioxide storage amount of the prepared hybrid filler, each sample was degassed for 6 hours while maintaining the residual pressure at 10-3 torr or less at 373K, and then 298K and 30 atm conditions using BEL-HP (BEL Japan). Carbon dioxide storage was measured at. The hydrogen storage measurement method was a step-by-step method, and the average amount of samples was 0.1 g.

Measurement Example 7 Electrochemical Capacitor Electrode Test of Hybrid Filler

In order to conduct the electrochemical capacitor electrode test using the manufactured hybrid filler, the hybrid filler was coated on aluminum foil to make an electrode, and after obtaining the Cyclic Voltameter data under the condition of 100 mV, the internal area was set as a charging capacity and manufactured as an electrode. The filling amount per unit weight of one hybrid filler material was obtained.

Measurement Example 8 Evaluation of Heat Dissipation Characteristics Using Hybrid Filler

In order to evaluate the heat dissipation characteristics of the composite material using the prepared hybrid filler, a composite material was prepared by mixing 50 wt.% Of the hybrid filler using an epoxy resin. The prepared sample was processed into a disk shape of 1 mm diameter 10 mm thick, which was analyzed using a hot-wire heat radiation test equipment.

Measurement Example 9 Evaluation of Electromagnetic Shielding Characteristics Using Hybrid Filler

In order to determine the electromagnetic shielding characteristics of the prepared hybrid filler, a composite material including 30 wt.% Of a hybrid filler was manufactured using a polypropylene resin. The fabricated composite material was processed into a disk with a diameter of 1 mm and a diameter of 150 mm, and the reflectance and absorptance were simultaneously analyzed by S12 method using a vector type electromagnetic shielding measuring instrument and the sum was obtained as the electromagnetic shielding value.

1 g of carbon fiber was washed three times with distilled water at room temperature, which was then immersed in 3M nitric acid solution for 30 minutes, and then thoroughly washed with distilled water for 12 hours, followed by complete drying at a temperature of 80 degrees Celsius for 12 hours.

The dried carbon fiber was subjected to a metal catalyst coating by an electrical method as follows. As a electrolyte, a solution of 1: 1 mixed of NiCl 2 1M and NiSO 4 3M solutions was used, and the pH was 3.0 ° C at 25 ° C. The current density is fixed at 1 A / m 2, but this current density does not limit the present invention. The coating time was changed to change the coating time until the Ni coating amount was 1.0 wt.%. Metal-coated carbon fiber as described above was again washed 1-2 times in distilled water and completely dried at 120 ℃ over 12 hours.

The metal-coated carbon fiber was further heat-treated for 1 hour under nitrogen atmosphere in a tube furnace at 250 degrees Celsius. At this time, the average metal particle diameter was about 2 nm. The heat-treated metal-coated carbon fiber was directly synthesized carbon nanotubes using ethylene gas in an argon atmosphere, the synthesis temperature proceeded at 900 degrees Celsius, but this temperature does not limit the present invention. The synthesis time was adjusted until the total amount of synthesized carbon nanotubes became 0.5 wt.% Relative to the carbon fiber weight.

1 g of carbon fiber was washed three times with distilled water at room temperature, which was then immersed in 3M nitric acid solution for 30 minutes, and then thoroughly washed with distilled water for 12 hours, followed by complete drying at a temperature of 80 degrees Celsius for 12 hours.

The dried carbon fiber was chemically coated with a metal catalyst in the following manner. The coating bath was made of NiCl2 0.5M, NiSO4 0.5M, Sodium borohydride 0.01M, the process temperature is fixed at pH 7.0, 60 degrees Celsius, but this condition does not limit the present invention. The coating time was changed to change the coating time until the Ni coating amount was 1.0 wt.%. Metal-coated carbon fiber as described above was again washed 1-2 times in distilled water and completely dried at 120 ℃ over 12 hours.

The metal-coated carbon fiber was further heat-treated for 1 hour under nitrogen atmosphere in a tube furnace at 250 degrees Celsius. At this time, the average metal particle diameter was about 2 nm. The heat-treated metal-coated carbon fiber was directly synthesized carbon nanotubes using ethylene gas in an argon atmosphere, the synthesis temperature proceeded at 900 degrees Celsius, but this temperature does not limit the present invention. The synthesis time was adjusted until the total amount of synthesized carbon nanotubes became 0.5 wt.% Relative to the carbon fiber weight.

1 g of carbon fiber was washed three times with distilled water at room temperature, which was then immersed in 3M nitric acid solution for 30 minutes, and then thoroughly washed with distilled water for 12 hours, followed by complete drying at a temperature of 80 degrees Celsius for 12 hours.

The dried carbon fiber was subjected to a metal catalyst coating by an electrical method as follows. As a electrolyte, a solution of 1: 1 mixed of NiCl 2 1M and NiSO 4 3M solutions was used, and the pH was 3.0 ° C at 25 ° C. The current density is fixed at 1 A / m 2, but this current density does not limit the present invention. The coating time was changed until the coating amount was changed to 5.0 wt.%. Metal-coated carbon fiber as described above was again washed 1-2 times in distilled water and completely dried at 120 ℃ over 12 hours.

The metal-coated carbon fiber was further heat-treated for 1 hour under nitrogen atmosphere in a tube furnace at 250 degrees Celsius. At this time, the average metal particle diameter was about 5 nm. The heat-treated metal-coated carbon fiber was directly synthesized carbon nanotubes using ethylene gas in an argon atmosphere, the synthesis temperature proceeded at 900 degrees Celsius, but this temperature does not limit the present invention. The synthesis time was controlled until the total amount of synthesized carbon nanotubes became 2.0 wt.% Relative to the carbon fiber weight.

1 g of carbon fiber was washed three times with distilled water at room temperature, which was then immersed in 3M nitric acid solution for 30 minutes, and then thoroughly washed with distilled water for 12 hours, followed by complete drying at a temperature of 80 degrees Celsius for 12 hours.

The dried carbon fiber was chemically coated with a metal catalyst in the following manner. The coating bath was made of NiCl2 0.5M, NiSO4 0.5M, Sodium borohydride 0.01M, the process temperature is fixed at pH 7.0, 60 degrees Celsius, but this condition does not limit the present invention. The coating time was changed until the coating time was changed to 10.0 wt.%. Metal-coated carbon fiber as described above was again washed 1-2 times in distilled water and completely dried at 120 ℃ over 12 hours.

The metal-coated carbon fiber was further heat-treated for 1 hour under nitrogen atmosphere in a tube furnace at 250 degrees Celsius. At this time, the average metal particle diameter was about 6 nm. The heat-treated metal-coated carbon fiber was directly synthesized carbon nanotubes using ethylene gas in an argon atmosphere, the synthesis temperature proceeded at 900 degrees Celsius, but this temperature does not limit the present invention. The synthesis time was adjusted until the total amount of synthesized carbon nanotubes was 3.5 wt.% Relative to the weight of the carbon fiber.

1 g of carbon fiber was washed three times with distilled water at room temperature, which was then immersed in 3M nitric acid solution for 30 minutes, and then thoroughly washed with distilled water for 12 hours, followed by complete drying at a temperature of 80 degrees Celsius for 12 hours.

The dried carbon fiber was subjected to a metal catalyst coating by an electrical method as follows. As a electrolyte, a solution of 1: 1 mixed of NiCl 2 1M and NiSO 4 3M solutions was used, and the pH was 3.0 ° C at 25 ° C. The current density is fixed at 1 A / m 2, but this current density does not limit the present invention. The coating time was changed until the coating time was changed to 20 wt.%. Metal-coated carbon fiber as described above was again washed 1-2 times in distilled water and completely dried at 120 ℃ over 12 hours.

The metal-coated carbon fiber was further heat-treated for 1 hour under nitrogen atmosphere in a tube furnace at 250 degrees Celsius. At this time, the average metal particle diameter was about 7 nm. The heat-treated metal-coated carbon fiber was directly synthesized carbon nanotubes using ethylene gas in an argon atmosphere, the synthesis temperature proceeded at 900 degrees Celsius, but this temperature does not limit the present invention. The synthesis time was controlled until the total amount of synthesized carbon nanotubes was 10.0 wt.% Relative to the carbon fiber weight.

Hybridization degree of the hybrid filler according to the present invention Metal catalyst amount (wt.%) Metal catalyst size (nm) Carbon Nanotube Content
Of carbon fiber Example 1 One 2 0.5 Example 2 One 2 0.5 Example 3 5 5 2.0 Example 4 10 6 3.5 Example 5 20 7 10.0

      Application-specific characteristics of the hybrid filler according to the present invention Increased composite material properties (% increase compared to simple mixing) Hydrogen storage (wt.%) CO2 storage (wt.%) Charge capacity (F / g) Heat dissipation characteristics (W / mK) Electromagnetic shielding (dB) Untreated - 0.01 One 2 0.5 5 Example 1 5 0.5 5 5 3 10 Example 2 5 0.5 5 5 3 10 Example 3 8 1.4 11 25 8 15 Example 4 14 2.0 15 45 12 20 Example 5 20 3.0 20 80 15 35

Claims (6)

(1) coating the carbon fiber with a metal catalyst by acid / electrochemical treatment;
(2) heat treating the metal catalyst coated carbon fiber in an inert atmosphere; And
(3) Manufacturing method of carbon nanotube-carbon fiber hybrid filler which synthesizes heat-treated metal-coated carbon fiber by direct synthesis of carbon nanotube using hydrocarbon synthesis gas, manufacturing high strength composite material, hydrogen storage medium, carbon dioxide medium , Electrochemical Capacitor Electrode Material, Heat Dissipation Composite Material, Electromagnetic Wave Shielding Composite Material.
The method of claim 1,
The carbon fiber is a polyacrylonitrile-based and pitch-based, as well as a hybrid filler manufacturing and application method characterized in that using a high carbon-containing material having a fibrous form.
The method of claim 1,
Manufacturing method having a content of the metal coated on the carbon fiber 1.0 wt.% To 20 wt.%
The method of claim 1,
Manufacturing method having a particle diameter of 1.0 nm to 10 nm of the metal catalyst coated on the carbon fiber
The method of claim 1,
Manufacturing method having the amount of carbon nanotubes directly synthesized on the carbon fiber is 1.0 wt.% To 10 wt.% (Carbon fiber weight)
The method of claim 1,
5 to 20% mechanical properties increase method, 0.5 wt.% To 3.0 wt.% Hydrogen storage characteristics, 5.0 wt.% To 20 wt.% Carbon dioxide storage characteristics, Manufacturing method having electrochemical battery charging characteristic of 5 F / g to 80 F / g, heat dissipation characteristic of 3 W / mK to 15 W / mK, or electromagnetic shielding characteristic of 10 dB to 35 dB

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