KR20190122336A - Carbon nanotube fiber and preparation method thereof - Google Patents

Abstract

The present invention relates to a method of improving the tensile strength of carbon nanotube fibers and carbon nanotube fibers having improved tensile strength. The tensile strength of the carbon nanotube fibers can be improved by adjusting the weight ratio of the carbon nanotube type.

Description

Carbon nanotube fiber and its manufacturing method {CARBON NANOTUBE FIBER AND PREPARATION METHOD THEREOF}

The present invention relates to a method of improving the tensile strength of carbon nanotubes and carbon nanotubes with improved tensile strength.

Carbon nanotubes (CNTs), a type of carbon allotrope, are materials ranging in diameter from several tens to tens of nanometers in length and from hundreds of micrometers to several millimeters in length, and have been studied in various fields because of their excellent thermal, electrical, physical properties and high aspect ratios. Has been going on. The unique properties of these carbon nanotubes are due to sp2 bonds of carbon, which are stronger than iron, lighter than aluminum, and exhibit electrical conductivity comparable to metals. The types of carbon nanotubes are largely determined by single-wall carbon nanotubes (SWNT), double-wall carbon nanotubes (DWNT), and multi-walled carbon nanotubes (Multi- Wall Carbon Nanotube, MWNT), and is divided into zigzag, armchair, and chiral structures according to asymmetry / chirality.

To date, most of the researches have been carried out to disperse carbon nanotubes in powder form as a reinforcing agent for composite materials or to manufacture transparent conductive films using dispersion solutions, and some fields have already been commercialized. However, in order to use carbon nanotubes in composite materials and transparent conductive films, dispersion of carbon nanotubes is important. Due to the cohesive force of carbon nanotubes due to strong van der Waals force, they are dispersed at high concentration and maintain dispersibility. It is not easy to do. In addition, in the case of a composite material using carbon nanotubes as a reinforcing material, it is difficult to sufficiently express the excellent properties of carbon nanotubes.

In recent years, carbon nanotube fiberization researches for the production of carbon nanotube structures that sufficiently express the properties of carbon nanotubes have been conducted.

The fiberization method using a dispersion solution containing carbon nanotubes and a dispersing agent is typically 'coagulation spinning', 'liquid-crystalline spinning', 'array spinning' and ' Direct spinning '.

The coagulation spinning method involves injecting a dispersion solution containing carbon nanotubes and a dispersant into a polymer solution, and then dispersing the dispersant in the dispersion solution into a polymer solution and replacing the polymer with a binder to act as a binder. It is a method of fiberizing.

The liquid crystal spinning method is a method in which a carbon nanotube solution is fiberized using a property of forming a liquid crystal under specific conditions. This method has the advantage of making carbon nanotube fibers with good orientation, but has the disadvantages that the spinning speed is very slow and the liquid crystal forming conditions of the carbon nanotubes are difficult.

The array spinning method is a method of forming a carbon nanotube film from a carbon nanotube array vertically aligned on a substrate, and twisting the fiber to form a carbon nanotube film. This method has the advantage of making carbon nanotube fibers that are almost free of impurities, but has the disadvantage that continuous processing is impossible.

The direct spinning method involves injecting a liquid carbon source and a catalyst into the inlet of a high temperature furnace together with a carrier gas to synthesize carbon nanotubes in the furnace and discharge the carbon nanotubes to the outlet of the furnace together with the transfer gas. It is a method of winding up an assembly inside or outside a heating furnace, and obtaining a fiber. This method has the advantage of producing a large amount of carbon nanotube fibers compared to other methods with a spinning speed of up to 20-30 m / min, but due to the nature of the fibrous particles, the carbon nanotube fiber particles can be twisted or aggregated again, and heated. Since it can be easily attached to the wall of the furnace, it is very difficult to smoothly discharge the carbon nanotube fibers.

Although the mechanical strength of carbon nanotubes itself, in particular, the tensile strength, is very good, exceeding 100 GPa, the synthesized carbon nanotubes are short fibers in short length and are therefore limited in application. In order to solve this problem, a method of making carbon nanotube aggregates of long fibers by connecting carbon nanotubes of short fibers has been studied in recent years.

Factors affecting the physical properties of carbon nanotube fibers or carbon nanotube aggregates include the length, diameter, and number of walls of the carbon nanotubes. Among them, generally, it is known that the smaller the number of carbon nanotube walls, the higher the tensile strength.

The properties of carbon nanotube fibers include excellent physical strength, electrical conductivity, thermal conductivity, and many studies have been conducted to improve such physical properties. Among them, in order to improve physical strength, the breaking strength of the carbon nanotube fiber assembly may be improved, and in order to improve the breaking strength, physical post-treatment and chemical post-treatment may be generally performed. However, prior to such a post-treatment process, it is important to prepare a high-strength carbon nanotube fiber aggregate, and a study on a method for improving the tensile strength of the carbon nanotube fiber aggregate by appropriately adjusting the source is required.

The present invention provides a method capable of improving the tensile strength of the carbon nanotube fiber assembly, and an improved carbon nanotube.

In order to solve the above problems, the present invention

Consists of a continuous aggregate of carbon nanotubes including double-walled carbon nanotubes and multi-walled carbon nanotubes,

Provided are carbon nanotube fibers having a weight ratio of double-walled carbon nanotubes / multi-walled carbon nanotubes of 0.7 to 1.4.

According to one embodiment, the weight ratio of the double-walled carbon nanotubes / multi-walled carbon nanotubes may be 0.7 to 1.2.

According to one embodiment, the tensile strength of the carbon nanotube fibers may be 1.5 to 2 N / tex.

According to another embodiment of the present invention, by injecting a reaction gas containing a carbon source with a catalyst, a promoter and a transfer gas into a reaction tube equipped with a heating furnace to produce a carbon nanotube fiber that is a continuous assembly of carbon nanotubes The method provides a method for producing carbon nanotube fibers, wherein the molar ratio of promoter / catalyst is 0.4 to 1.2.

According to one embodiment, the molar ratio of the promoter / catalyst may be 0.5 or more and 1.1 or less.

According to one embodiment, the reaction zone temperature of the reaction tube may be 1,100 to 1,300 ℃.

According to one embodiment, the transport gas may include a reducing gas including hydrogen gas, ammonia gas or a mixture thereof.

According to one embodiment, the transport gas may further include an inert gas.

According to one embodiment, the carbon source is methane (ethylene), ethylene (acetyl), acetylene (acetylene), methyl acetylene (methyl acetylene), vinyl acetylene (vinyl acetylene), ethanol (ethanol), methanol (methanol), propanol ( propanol, acetone, xylene, chloroform, ethyl acetate, diethyl ether, polyethylene glycol, ethyl formate, mesh From the group consisting of methylene, tetrahydrofuran, dimethyl formamide, dichloromethane, hexane, benzene, carbon tetrachloride and pentane It may include one or more selected.

According to one embodiment, the catalyst is iron (Fe), nickel (Ni), cobalt (Co), copper (Cu), platinum (Pt), ruthenium (Ru), molybdenum (Mo), vanadium (V) and its It may include one or more elements selected from the group consisting of oxides.

According to one embodiment, the catalyst may be in the form of metallocene (metallocene).

According to one embodiment, the promoter may be selected from elemental sulfur (S), sulfur-containing compounds, and combinations thereof.

According to one embodiment, the promoter is sulfur (S), methyl thiol, methyl ethyl sulfide, dimethyl thioketone, phenyl thiol, diphenylsul It may include one or more selected from the group consisting of diphenyl sulfide, pyridine, quinoline, benzothiophene and thiophene.

Other specific details of embodiments of the present invention are included in the following detailed description.

The present invention can improve the tensile strength of the carbon nanotube fibers by a simple process of controlling the weight ratio of the carbon nanotube type constituting the carbon nanotube fibers when manufacturing the carbon nanotube fibers.

The carbon nanotube fiber produced by the method according to the present invention is characterized in that the reinforcement of the multifunctional composite material, the deformation and damage detector using the stable and repetitive piezo resistance effect, the transmission line using high conductivity, high specific surface area, excellent mechanical properties and electrical conductivity It is expected that the present invention can be applied to various fields such as electrochemical devices used, for example, microelectrode materials for detecting biomaterials, supercapacitors and actuators.

1 is a graph showing the change in tensile strength of carbon nanotube fibers according to the catalyst and promoter input.
Figure 2 is a graph showing the change in weight of carbon nanotubes with temperature.
Figure 3 is a graph showing the change in carbon nanotube mass reduction rate with temperature.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The term "multi-wall" as used herein means to have three or more walls because it must be distinguished from "double wall". For example, it may mean, but is not limited to, a nasanonanotube having a wall of 3 to 200 layers, for example, 3 to 150 layers.

As used herein, the term "aggregate" may be used interchangeably with "aggregate" and may be understood to mean a collection of singular individuals.

As used herein, the term "injection" may be used interchangeably with "introduction, input" within this specification and may be understood to mean flowing or injecting liquid, gas, or heat to where necessary. .

As used herein, the term "carbon nanotube fibers" refers to both carbon nanotubes formed by growing in a fiber form or a plurality of carbon nanotubes formed by fusing into a fiber form.

Unless stated otherwise in the present specification, the expression "to" is used as an expression including a corresponding numerical value. Specifically, for example, the expression "1 to 2" means not only including 1 and 2, but also including all values between 1 and 2.

Hereinafter, the carbon nanotube fibers and the method of manufacturing the same according to the present invention will be described in more detail.

Techniques for producing carbon nanotube fibers include coagulation spinning, liquid crystal spinning, array spinning, direct spinning, and the like. The present invention follows a process of directly spinning carbon nanotube fibers among them. The direct spinning method injects carbon nanotubes and catalyst of gaseous or liquid phase into the inlet of high temperature furnace together with the transfer gas to synthesize carbon nanotubes in the furnace and discharge the carbon nanotube assembly discharged to the outlet of the furnace together with the transfer gas. It is a method of winding a fiber inside or outside a heating furnace to obtain a fiber.

The length, diameter, and number of walls of the carbon nanotubes constituting the carbon nanotube fibers act as variables affecting the strength of the carbon nanotube fibers, and these variables have a great influence from the reaction conditions of the production of the carbon nanotube fibers. Receive. Among them, the number of walls of the carbon nanotubes can have a great influence on the tensile strength of the carbon nanotube fibers, which may vary depending on the amount of catalyst and promoter added during the reaction conditions. Therefore, the present invention is to provide a carbon nanotube fiber of high tensile strength by controlling the input amount of the catalyst and the promoter and the ratio of the carbon nanotube type.

Generally, the smaller the number of walls of carbon nanotubes, the higher the tensile strength is. Accordingly, it is common to expect that fibers made of single-walled or double-walled carbon nanotubes will have higher tensile strength than fibers made of multi-walled carbon nanotubes. Therefore, in the related art, a research on applying a carbon nanotube having a small number of walls in order to improve the physical properties of the carbon nanotube fibers has been mainly conducted.

The present inventors have studied the tensile strength of carbon nanotube fibers including multi-walled carbon nanotubes in addition to double-walled carbon nanotubes, and found that the tensile strength can be improved by controlling the proportion of carbon nanotube types.

According to a specific embodiment, the present invention comprises a continuous aggregate of carbon nanotubes including double-walled carbon nanotubes and multi-walled carbon nanotubes, and the weight ratio of double-walled carbon nanotubes / multi-walled carbon nanotubes is 0.7 to 1.4, eg For example, 0.7 to 1.2 or 0.76 to 1.12 provides carbon nanotube fibers.

According to one embodiment, the carbon nanotubes having a weight ratio adjusted as described above may have a tensile strength of 1.5 to 2 N / tex.

In the carbon nanotube fiber manufacturing process, if the catalyst particle size becomes larger than necessary in the catalyst growth process after pyrolysis of raw materials, it does not react with carbon and remains as an unreacted catalyst. Since the cocatalyst has an effect of inhibiting excessive growth of the catalyst particles, the size of the catalyst particles can be controlled. Producing carbon nanotubes with catalyst particles of appropriate size is advantageous for producing carbon nanotube fibers of high tensile strength because they can synthesize longer fibers and minimize impurities such as unreacted catalysts.

Therefore, according to one embodiment, the present invention is injected into a reaction tube equipped with a heating furnace with a catalyst, a promoter and a transfer gas containing a carbon source to produce a carbon nanotube fiber that is a continuous assembly of carbon nanotubes In the method, the molar ratio of the promoter / catalyst can be adjusted to 0.4 to 1.2.

When the catalyst or catalyst precursor is injected, a cocatalyst may be injected together, for example, the molar ratio of the cocatalyst / catalyst is adjusted to 0.4 or more or 0.5 or more or 0.6 or more or 0.65 or more, 1.2 or less or 1.1 or less or 1.0 or less It can be adjusted to 0.97 or less. In the range as described above it can be expected to improve the carbon nanotube fiber tensile strength.

The catalyst precursor is a substance which is not included in the catalyst cycle but is transformed into an active catalyst or generates an active catalyst in the system of the catalysis, and synthesizes carbon nanotubes after the catalyst precursor forms the catalyst. do.

The catalyst or catalyst precursor consists of iron (Fe), nickel (Ni), cobalt (Co), copper (Cu), platinum (Pt), ruthenium (Ru), molybdenum (Mo), vanadium (V) and oxides thereof. It may include one or more selected from the group, but is not limited thereto. The catalyst may also be in the form of nanoparticles, for example in the form of metallocene, such as Ferrocene, which is a compound containing iron, nickel, cobalt, and the like. Specifically, for example, the ferrocene catalyst precursor may be injected at a rate of 0.05 to 0.2 g / hr or 0.05 to 0.1 g / hr, but is not limited thereto.

For example, the promoter may be an elemental sulfur, a sulfur-containing compound, or a combination thereof, and specific examples thereof include methyl thiol, methyl ethyl sulfide, and dimethyl thioketone. Sulfur-containing aliphatic compounds such as these; Sulfur-containing aromatic compounds such as phenyl thiol, diphenyl sulfide and the like; Sulfur-containing heterocyclic compounds such as pyridine, quinoline, benzothiophene, thiophene and the like; The element may be sulfur (S), preferably sulfur or thiophene, and more preferably sulfur.

According to one embodiment, the promoter may be injected at a rate of 0.005 to 0.3 g / hr or 0.005 to 0.2 g / hr or 0.005 to 0.1 g / hr.

In general, the synthesis of carbon nanotubes proceeds as the carbon is diffused into the catalyst in the molten state of the catalyst and then precipitated. The cocatalyst increases the carbon diffusion rate in synthesizing the carbon nanotubes and rapidly increases the carbon nanotubes. Allow the tube to synthesize. In addition, the promoter reduces the melting point of the catalyst and removes the amorphous carbon to synthesize high purity carbon nanotubes at low temperature.

According to a preferred embodiment of the present invention, the catalyst or catalyst precursor and promoter may be a liquid phase in the liquid carbon compound, the gaseous phase in the gaseous carbon compound. Therefore, it is possible to dissolve and inject a catalyst precursor and a cocatalyst into the liquid carbon compound, and vaporize the gaseous carbon compound into a gaseous form.

In the present invention, the carbon source may be liquid or gaseous, and the carbon source is synthesized into carbon nanotubes by diffusion into a catalyst, and is used in consideration of molecular weight distribution, concentration, viscosity, surface tension, dielectric constant, and properties of the solvent used. .

The catalyst or catalyst precursor may be mixed at 0.5 to 10% by weight, or 0.5 to 5% by weight, or 0.5 to 4% by weight relative to the carbon source. When an excess catalyst or catalyst precursor is used compared to the carbon source, the catalyst acts as an impurity, making it difficult to obtain high-purity carbon nanotube fibers, but may be a factor that inhibits the thermal, electrical and physical properties of the carbon nanotube fibers. .

The liquid or gaseous carbon source is methane, ethylene, acetylene, methyl acetylene, vinyl acetylene, ethanol, methanol, propanol , Acetone, xylene, chloroform, ethyl acetate, diethyl ether, polyethylene glycol, ethyl formate, mesitylene ( one selected from the group consisting of mesitylene, tetrahydrofuran, dimethyl formamide, dichloromethane, hexane, benzene, carbon tetrachloride and pentane It may contain the above.

Specifically, the liquid carbon source is ethanol, methanol, propanol, acetone, xylene, chloroform, ethyl acetate, diethyl ether, polyethylene glycol, ethyl formate, mesitylene, tetrahydrofuran, dimethylformamide, dichloromethane, hexane It may include one or more selected from the group consisting of, benzene, carbon tetrachloride and pentane. Preferably it may include any one or more selected from the group consisting of ethanol, xylene, diethyl ether, polyethylene glycol, 1-propanol, acetone, ethyl formate, benzene, hexane and mesitylene.

The gaseous carbon source may include one or more selected from the group consisting of methane, ethylene, acetylene, methylacetylene and vinylacetylene.

According to one embodiment, the gas hourly space velocity (GHSV) of the reaction gas supplied to the reaction zone may be 0.12 to 6.0 hr ⁻¹ , for example, 0.6 to 3.6 hr ⁻¹ , or 0.84 to 2 hr ⁻¹ , Or 1 to 2 hr ⁻¹ . Also, GHSV of the feed gas introduced to the reaction zone may be, for example, appropriately selected from the range in the case of hydrogen gas, 1.2 to 60 hr ^-1, or from 6 to 30 hr ^-1, or a 12 to 30hr ^-1. GHSV represents the efficiency of fluid raw material processing in a continuous reactor at gas space velocity, and the hourly fluid flow rate divided by reactor size.

According to one embodiment, the transport gas used in the present invention may further include an inert gas. For example, the transport gas (carrying gas) may use an inert gas, a reducing gas, or a combination thereof, and preferably include a reducing gas containing a hydrogen atom. As the reducing gas, a gas containing hydrogen, ammonia or a mixed component thereof can be used.

Inert gases may include, for example, gases containing nitrogen, helium, neon, argon, krypton, xenon, radon, or mixtures thereof, which are chemically very stable and do not exchange or share electrons. Since it does not have a property, it can play a role of allowing the carbon nanotubes to flow and move due to the inflow of gas without reaction with the carbon nanotubes.

According to one embodiment, the conveying gas may be injected at a linear speed of 0.5 to 50 cm / min, for example 0.5 to 40 cm / min or 0.5 to 30 cm / min or at a linear speed of 0.5 to 20 cm / min. have. The feed gas injection linear velocity may vary depending on the type of transfer gas, reactor size, catalyst type, and the like.

According to a preferred embodiment, the carbon nanotube fiber assembly may be prepared by a direct spinning method that spuns carbon nanotube fibers directly by chemical vapor deposition. In the direct spinning method, a carbon nanotube assembly is synthesized in a heating furnace by injecting a carbon source and a catalyst of a gaseous or liquid phase into a heating furnace inlet with a transport gas, and discharged together with the transport gas to an outlet of the heating furnace. It is a method of winding a fiber inside or outside a furnace to obtain a fiber.

According to one embodiment, the reaction zone temperature of the reaction tube may be 1,000 to 3,000 ℃. Preferably it can maintain a temperature of 1,000 to 2,000 ℃, or 1,000 to 1,500 ℃ or 1,000 to 1,300 ℃, more preferably may be 1,100 to 1,300 ℃. If less than 1000 ℃, there may be a problem that the carbon nanotube fibers are not formed. And, if the temperature exceeds 3000 ℃ may be a problem that the carbon nanotubes are vaporized, the above range is preferred.

In addition, the temperature difference between the reaction tube inlet and the furnace inlet may be 400 to 1,000 ° C, for example 500 to 1,000 ° C, for example 400 to 500 ° C. By adjusting the temperature of the inlet of the reaction tube and the temperature of the inlet of the furnace, there can be no rotation flow of the upper part of the reaction tube.

The resulting carbon nanotube fibers can be wound up and collected. The winding speed affects the orientation of the carbon nanotubes in the fiber axial direction, which determines the thermal, electrical and physical properties of the carbon nanotube fibers. Preferably, it can wind up in the range of 1-100 m / min.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Examples and Comparative Examples: Preparation of Carbon Nanotube Fibers

The weight ratio of double-walled / multi-walled carbon nanotubes and the molar ratio of the catalyst and the cocatalyst are shown in Table 1, and the vaporization of the ferrocene catalyst precursor at 0.001 to 0.1 g / hr and the sulfur promoter at 0.001 to 0.1 g / hr in and, as the methane as the carbon compound 1-2 as a GHSV of hr ^-1, feed gas was a hydrogen gas is introduced into the top of a vertical cylindrical reactor at a temperature of 1,100 ~ 1,250 ℃ a GHSV of 12 ~ 30hr ^-1. The reactor internal temperature gradient was controlled by setting the temperature of the reaction tube inlet to 200 to 300 ° C and the temperature of the furnace inlet to 700 to 800 ° C. And the carbon nanotube fibers discharged to the outlet of the bottom of the reactor was wound with a winding means consisting of bobbin (bobbin).

division Comparative Example 1 Example 1 Example 2 Comparative Example 2 Promoter / Catalyst Ratio
(S / Fe) 0.32 0.65 0.97 1.3 Double Wall Carbon Nanotube / Multi Wall Carbon Nanotube Weight Ratio 1.41 1.12 0.76 0.69 Remain (%) 18.9 18.4 18.8 15.3

Experimental Example 1 Evaluation of Tensile Strength

In order to check the tensile strength of the carbon nanotube fibers according to the input of the catalyst and the cocatalyst, a textechno FAVIMAT + device was used at a load cell range of 210 cN, a gauge length of 2.0 cm, and a speed of 2 mm / min. Tensile strength was measured. The results are shown in Figure 1, as shown in the figure, it can be seen that the tensile strength is improved when the double-walled carbon nanotube / multi-walled carbon nanotube weight ratio is 0.7 to 1.4, especially 0.76 to 1.12.

Experimental Example 2: Thermogravimetric Analysis

Thermogravimetric Analysis equipment of Mettler-Toledo was used for thermogravimetric analysis of carbon nanotube fibers at a temperature increase rate of 10 ° C./min and air at 50 ml / min. The weight change of the carbon nanotube fibers with temperature is shown in FIG. 2, and the results of differential thermal gravimetry (DTG) showing the first differential curve of weight loss by combustion are shown in FIG. 3.

2 to 3, the presence of the multi-walled carbon nanotubes decomposed at 500 or more and 550 ℃ or less, and the double-walled carbon nanotubes decomposed at around 800 ℃ can be confirmed.

As mentioned above, the specific part of the content of the present invention has been described in detail, and it is apparent to those skilled in the art that the specific technology is merely a preferred embodiment, and thus the scope of the present invention is not limited thereto. something to do. Thus, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

Claims (13)

Consists of a continuous aggregate of carbon nanotubes including double-walled carbon nanotubes and multi-walled carbon nanotubes,
Carbon nanotube fibers, wherein the weight ratio of double-walled carbon nanotubes / multi-walled carbon nanotubes is 0.7 to 1.4. The method of claim 1,
Carbon nanotube fibers, wherein the weight ratio of the double-walled carbon nanotubes / multi-walled carbon nanotubes is 0.7 to 1.2. The method of claim 1,
Carbon nanotube fibers having a tensile strength of 1.5 to 2 N / tex. In the method for producing carbon nanotube fibers, which is a continuous assembly of carbon nanotubes by injecting a reaction gas containing a carbon source with a catalyst, a promoter and a transfer gas into a reaction tube equipped with a heating furnace,
The molar ratio of the cocatalyst / catalyst is 0.4 to 1.2, carbon nanotube fibers manufacturing method. The method of claim 4, wherein
The molar ratio of the promoter / catalyst is 0.5 or more and 1.1 or less, carbon nanotube fiber manufacturing method. The method of claim 4, wherein
Reaction zone temperature of the reaction tube is 1,100 to 1,300 ℃, carbon nanotube fiber manufacturing method. The method of claim 4, wherein
The conveying gas comprises a reducing gas containing hydrogen gas, ammonia gas or a mixture of these, carbon nanotube fiber manufacturing method. The method of claim 4, wherein
The conveying gas further comprises an inert gas, carbon nanotube fiber manufacturing method. The method of claim 4, wherein
The carbon source is methane, ethylene, acetylene, methyl acetylene, vinyl acetylene, ethanol, methanol, methanol, propanol, acetone ), Xylene, chloroform, ethyl acetate, diethyl ether, polyethylene glycol, ethyl formate, mesitylene, tetra One or more selected from the group consisting of tetrahydrofuran, dimethyl formamide, dichloromethane, hexane, benzene, carbon tetrachloride and pentane Will, carbon nanotube fiber manufacturing method. The method of claim 4, wherein
The catalyst is selected from the group consisting of iron (Fe), nickel (Ni), cobalt (Co), copper (Cu), platinum (Pt), ruthenium (Ru), molybdenum (Mo), vanadium (V) and oxides thereof. Containing one or more elements, carbon nanotube fiber manufacturing method. The method of claim 4, wherein
The catalyst is in the form of metallocene (metallocene), carbon nanotube fiber manufacturing method. The method of claim 4, wherein
The method of producing carbon nanotube fibers, wherein the promoter is selected from elemental sulfur (S), sulfur-containing compounds, and combinations thereof. The method of claim 4, wherein
The promoter is sulfur (S), methyl thiol, methyl ethyl sulfide, dimethyl thioketone, phenyl thiol, diphenyl sulfide, Method comprising the compound selected from pyridine, quinoline (quinoline), benzothiophene (benzothiophene), thiophene (thiophene) and combinations thereof.

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