KR20210126799A - Graphene and synthetic resin hybrid composite fiber comprising plant extracts and the manufacturing method therof - Google Patents

Abstract

The present invention relates to a graphene and synthetic resin hybrid composite fiber containing a plant extract and a manufacturing method thereof. More specifically, the present invention relates to the graphene and synthetic resin hybrid composite fiber containing the plant extract that nozzle-discharges a composition comprising the graphene, the synthetic resin, and the plant extract, thereby showing to have excellent electrical conductivity and mechanical strength of graphene and antibacterial and deodorizing performance; and the manufacturing method thereof.

Description

Graphene and synthetic resin hybrid composite fiber containing plant extract and manufacturing method thereof

The present invention relates to a graphene and synthetic resin hybrid composite fiber containing a plant extract and a manufacturing method thereof, and more particularly, to a composition comprising graphene, a synthetic resin, and a plant extract by nozzle-spinning a composition containing graphene, and excellent electrical conductivity of graphene And it relates to a graphene and synthetic resin hybrid composite fiber containing a plant extract to exhibit mechanical strength, antibacterial and deodorizing performance, and a method for producing the same.

Graphene is a material in which carbon is connected to each other in a hexagonal shape to form a honeycomb-shaped two-dimensional planar structure, and is known to have excellent physical strength, excellent thermal conductivity, and electrical properties.

Recently, due to the excellent properties of graphene, many attempts have been made to apply graphene to transparent electrodes, flexible displays, composite reinforcement materials, filters, biosensors, and integrated circuit packaging materials.

Such graphene can be roughly divided into four types of synthesis methods. The first method may refer to chemical vapor deposition (CVD) and epitaxial growth. The second method is a scotch tape or peel-off method, and the third method is an epitaxial growth method by electrically insulating the surface. And finally, there is a method of oxidizing through strong chemical oxidation treatment.

<Chemical Vapor Deposition (CVD)>

In 1841, after Shaffault first reported a graphite intercalation compound in which K metal was intercalated between graphite layers, many intercalation compounds were obtained by combining electron donor and electron acceptor material insertions such as alkali, alkaline earth, and rare earth metals. They each have quiet superconductivity or catalytic activity, depending on their structure.

And as the interlayer distance of GICs (Graphite Intercalation Compound, GICs) increased, the van der Waals force decreased, making it very easy to peel graphene from graphite. In addition, as carried out by the Kaner group in 2003, a violent reaction was attempted using a solvent such as alcohol on a stage using K metal as an intercalating material. At this time, a semi-stable thin film of about 30 layers was obtained, A study result of changing the shape of a scroll by ultrasound was reported.

<Peel-off method>

This method refers to the removal by mechanical force from the graphite crystal, which consists of weak bonds of van der Waals bonds. Graphene can be manufactured in this way because the surface of graphene has a smooth structure when the electrons of the pi orbital spread widely on the surface.

Referred to as such a method is a method of separating single-layer graphene using the adhesive force of a scotch tape. This method directly measured, analyzed, and reported the semi-integer quantum Hall effect, which had been suggested only by theories, so that graphene began to attract attention from researchers around the world.

<Chemical peeling method>

The chemical exfoliation method means dispersing graphene fragments exfoliated from graphite crystals in a solution phase through chemical treatment. If graphite is oxidized and then pulverized through ultrasonic waves, etc., graphene oxide uniformly dispersed in an aqueous solution can be produced. have.

However, in the case of the final graphene obtained in this way, even if a reducing agent is used, the reduction process is not performed perfectly. On the other hand, in the case of graphene separated using a surfactant, etc., the electrical properties are improved compared to the graphene obtained by the aforementioned reduction process, but due to the interlayer resistance between the graphene pieces, it does not show a practical level of sheet resistance characteristics. has a

<Epi Taxi Method>

This method means that carbon adsorbed or contained in the crystal at high temperature grows into graphene along the surface texture.

Among the above-described methods, the peel-off method belongs to a top-down method, and the other methods belong to a bottom-up method.

Graphene obtained by the top-down method has excellent crystallinity (high conductivity and few defects), but its production efficiency is low, which is not sufficient for practical application. In addition, there is a possibility of being contaminated with organic impurities, and there are disadvantages in that it is difficult to control the number of graphene layers.

The bottom-up method can control the number of graphene layers and growth factors using various types of substrates. In particular, using the CVD synthesis method, large-area, high-quality, high-purity graphene can be produced, enabling mass production.

Recently, the CVD synthesis method is the most used for mass production of high-quality graphene films. The CVD synthesis method is a bottom-up method that directly grows graphene on a substrate using a carbon source such as methane. Large-area single-layer graphene grown on a catalytic metal foil such as copper can be transferred to a desired target substrate.

On the other hand, due to population growth and industrial development, the demand for fibers is rapidly increasing, and the demand for new fibers having superior functions compared to natural fibers is increasing. Starting with the announcement of a new synthetic fiber called nylon by DuPont in 1938, polyester fibers, acrylic fibers, and polyurethane fibers were developed.

In recent years, the development of high-performance and ultra-high-performance fibers and nanofibers using new materials that exceed the performance limits of existing materials are in progress. Among them, carbon-based carbon composite fibers have excellent properties such as specific strength, inelasticity, and heat resistance compared to other types of fibers by adding various reinforcing materials, and a lightweight, high-strength, and high-elasticity composite can be made.

In particular, graphene/synthetic resin composite wire oil that can exhibit properties such as electrical conductivity and mechanical strength by containing graphene in fiber-containing fabric has been developed. preparing a mixed solution containing graphene, a polymer, and a solvent; preparing a graphene/polymer composite fiber by spinning the mixed solution; preparing a graphene/polymer/polycatecholamine composite fiber by coating a polycatecholamine on the surface of the graphene/polymer composite fiber; and carbonizing the graphene/polymer/polycatecholamine composite fiber, wherein the weight of graphene in the mixed solution is higher than the weight of the polymer. Graphene-based composite fibers with significantly improved high strength properties compared to conventional graphene fibers can be manufactured, and graphene composite fibers with high strength properties can be manufactured even with heat treatment at a significantly lower temperature, ensuring process efficiency A method for manufacturing graphene/polymer composite fibers that can do this has been developed.

In addition, Korean Patent No. 10-1973895 (registration date April 23, 2019) discloses the steps of dispersing graphene oxide in a dispersion medium to form a graphene oxide dispersion; polymerizing by adding an acid solution containing a conductive polymer to the graphene oxide dispersion; preparing a thermoelectric material having a graphene oxide/polymer composite fiber structure by spinning the polymerized graphene oxide dispersion; and reducing and drying the thermoelectric material having the graphene oxide/polymer composite fiber structure in a vacuum to prepare graphene/polymer composite fiber; Including, wherein the graphene/polymer composite fiber is a conductive polymer cross-linked between a plurality of graphene flakes included in the graphene/polymer composite fiber, and the conductive polymer is polyacetylene (PA) , polypyrrole (PPy), polythiophene (PTh), poly3,4-ethylenedioxythiophene (PEDOT), poly3-hexylthiophene (poly-3-hexylthiophene, P3HT), A method for manufacturing a thermoelectric material having a graphene/polymer composite fiber structure is known, including at least one selected from the group consisting of polyaniline (PANI) and phenethylamine.

In addition, in Korea Patent Publication No. 10-2019-0110351 (published on September 30, 2019), graphene oxide and a polymer are mixed in a solvent, and the weight of the polymer is less than or equal to the weight of the graphene oxide. preparing an oxide spinning solution; spinning the spinning solution in a coagulation bath to prepare graphene oxide fibers; And as a high-strength graphene composite fiber manufacturing method comprising the step of heat-treating the graphene oxide fiber, a method for manufacturing a graphene composite fiber having improved electrical conductivity and mechanical strength properties at the same time is known.

In addition, Korean Patent Application Laid-Open No. 10-2019-0110806 (published on October 01, 2019) discloses that in the graphene PP staple fibers used for spinning, 94 to 96% by weight of PP resin, 0.5 to 2% by weight of graphene material, 1 to The graphene PP short fibers are composed of 2.5 to 3.5% by weight of the fine porous particle material having a particle size of 40 nm, and the graphene PP short fibers include; The ratio of the graphene material, the fine porous particle material, and the PP grains is 2 (graphene material): 3 (porous particle material): 5 (PP grains), but 100% by weight of the graphene PP short fibers used for spinning Based on 0.5 to 2% by weight of graphene material, 2.5 to 3.5% by weight of fine porous particle material, and 88.5 to 93% by weight of PP resin with a source masterbatch consisting of 4 to 6% by weight of PP grains, the source It is characterized in that by cutting the masterbatch and PP resin into short fibers after melt extrusion and nozzle spinning, graphene PP short fibers for spinning use are completed, and the use of spinning to ensure good fastness to dyeing and washing properties Graphene PP short fibers are known.

However, the graphene/polymer composite fiber of the prior patent or its manufacturing method only exhibits the characteristics of graphene, such as electrical conductivity, mechanical strength, antistatic, dyeability improvement, fastness improvement, etc., as well as antibacterial, deodorizing There was a problem that such functions could not be exhibited.

[Patent Document 001] Korean Patent 10-1919658 (Registration Date: November 12, 2018) [Patent Document 002] Korea Registered Patent 10-1973895 (Registration Date April 23, 2019) [Patent Document 003] Korean Patent Publication No. 10-2019-0110351 (published on September 30, 2019) [Patent Document 004] Korean Patent Publication No. 10-2019-0110806 (published on October 01, 2019)

In order to solve the above problems, the present invention uses a composition containing graphene, a synthetic resin, and a plant extract by nozzle-spinning to exhibit excellent electrical conductivity and mechanical strength and antibacterial and deodorizing performance of graphene containing a plant extract. An object to be solved is to provide a graphene and synthetic resin hybrid composite fiber and a method for manufacturing the same.

The present invention is prepared by melt-spinning a composition comprising 0.01 to 1.0 parts by weight of graphene and 0.01 to 1.0 parts by weight of a plant extract per 100 parts by weight of a synthetic resin in order to solve the above problems, thereby providing electrical conductivity, tensile strength, antibacterial and deodorizing performance Graphene and synthetic resin hybrid composite fibers containing plant extracts are used as a means to solve the problem.

The graphene has an average thickness of 1 to 5 atomic layers, and an average plane size of 10 to 100 nm is a means of solving the problem.

The synthetic resin is selected from PET, PP or nylon as a means of solving the problem.

As a means of solving the problem, the plant extract is one or more types extracted from green tea, ginseng, dokomari or lacquer.

The average diameter of the filaments constituting the composite fiber is 1 to 100 μm as a means of solving the problem.

In addition, in the present invention, graphene powder having an average atomic layer thickness of 10 layers is put in purified water, put into a ball mill together with zirconia beads having an average size of 10 μm, and the ball mill is operated for 24 hours, then the filtered graphene aqueous solution is dried and graphene manufacturing a; Preparing a plant extract by adding 10% by weight of one or more plants selected from green tea, red sagebrush, or lacquer to a 50:50 volume ratio of ethanol and water, heat-extracting for 24 hours, filtration and drying; Graphene and synthetic resin containing a plant extract comprising a; mixing 0.01 to 1.0 parts by weight of the prepared graphene and 0.01 to 1.0 parts by weight of the prepared plant extract per 100 parts by weight of the synthetic resin to prepare a spinning solution and melt spinning A method of manufacturing a hybrid composite fiber is used as a means to solve the problem.

The synthetic resin is selected from PET, PP or nylon as a means of solving the problem.

The graphene and synthetic resin hybrid composite fiber of the present invention and a method for producing the same include an antistatic effect and mechanical strength and antibacterial and deodorizing performance according to the excellent electrical conductivity of graphene by nozzle spinning a composition containing graphene, a synthetic resin and a plant extract. There is an excellent effect to show the.

1 is a graph showing the tensile strength of graphene and synthetic resin hybrid composite fiber containing a plant extract of the present invention;
Figure 2 is a graph showing the electrical conductivity of the graphene and synthetic resin hybrid composite fiber containing the plant extract of the present invention;
Figure 3 is a test report showing the deodorizing performance of the graphene and synthetic resin hybrid composite fiber containing the plant extract of the present invention;
4 is a test report showing the antibacterial performance of graphene and synthetic resin hybrid composite fiber containing the plant extract of the present invention;

The present invention is prepared by melt spinning a composition comprising 0.01 to 1.0 parts by weight of graphene and 0.01 to 1.0 parts by weight of a plant extract per 100 parts by weight of a synthetic resin to exhibit electrical conductivity, tensile strength, antibacterial and deodorizing performance. Plant extracts It features graphene and synthetic resin hybrid composite fiber containing technical composition.

The graphene is characterized in that the average thickness is 1 to 5 atomic layers, and the average plane size is 10 to 100 nm in the technical configuration.

The synthetic resin is characterized in that it is selected from PET, PP or nylon in the technical configuration.

The plant extract is characterized in that it is one or more kinds extracted from ginseng, green tea, porcini or lacquer.

The average diameter of the filaments constituting the composite fiber is characterized in that the technical configuration is 1 to 100 ㎛.

In addition, in the present invention, 10% by weight of graphene powder having an average atomic layer thickness of 10 layers is added to purified water, put into a ball mill together with zirconia beads having an average size of 10 μm, and the ball mill is operated for 24 hours, and then filtered to obtain an aqueous solution of graphene. manufacturing; Preparing a plant extract by adding 10% by weight of one or more plants selected from ginseng, green tea, larvae, or lacquer to a 50:50 volume ratio of ethanol and water, extracting with heat for 24 hours, and then filtering; Preparing a plant extract-containing graphene powder by drying the mixed solution of the prepared graphene aqueous solution and the prepared plant extract while spraying it through a nozzle of a hot air dryer at 120° C.; A step of mixing 0.02 to 2.0 parts by weight of the graphene powder containing the plant extract prepared above per 100 parts by weight of the synthetic resin to prepare a spinning solution containing 0.01 to 1.0 parts by weight of graphene and a plant extract, respectively, and melt spinning; Plants containing; The manufacturing method of the graphene and synthetic resin hybrid composite fiber containing the extract is characterized by the technical configuration.

The synthetic resin is characterized in that it is selected from PET, PP or nylon in the technical configuration.

Hereinafter, embodiments and/or drawings of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms, and is not limited to the embodiments and/or drawings described herein.

The graphene and synthetic resin hybrid composite fiber containing the plant extract of the present invention exhibits electrical conductivity and tensile strength by graphene and at the same time exhibits antibacterial and deodorizing performance, 0.01 to 1.0 parts by weight of graphene per 100 parts by weight of the synthetic resin and It is prepared by melt spinning a spinning composition comprising 0.01 to 1.0 parts by weight of a plant extract.

Here, the plant extract uses one or more kinds extracted from green tea, ginseng, ginseng, or lacquer to exhibit antibacterial and deodorizing performance.

Ginseng (Panax ginseng C.A. Meyer) is a perennial herb belonging to the genus Araliaceae and Panax, and has been used as a traditional medicine in Asia, especially Korea, China, and Japan for centuries. Ginseng is an active ingredient and includes ginsendosides, polyacetylenes, alkaloides, phenolic compounds, polyasccharides, flavonoids, peptides, fatty acids, etc. it is known

Green tea (Camellia teaceac) is known to have a function of supplying nutrients of vitamins and minerals, and satisfying preferences such as taste and aroma. The main component of green tea's astringent taste is catechin, a polyphenol component, and depending on its derivative, catechin is epicatechin, epigallocatechin, epicatechin gallate, and epigallocatechin. It can be classified as epigallocatechin gallate.

The content of catechin reaches about 8 to 20% of that of dried green tea, and it is soluble in water and eluted into water when boiled with water. On the other hand, green tea contains various physiologically active substances. In particular, catechins reduce blood LDL cholesterol, thereby inhibiting the formation of blood clots and preventing arteriosclerosis, inhibiting the formation of lipid peroxide and preventing fat oxidation. It has been found that it is also used as a natural antioxidant. In addition, green tea inhibits the growth of cancer along with anti-aging and has anti-carcinogenic functions, and also has an anti-toxic effect that neutralizes toxins, so it is also known to prevent food poisoning.

Dokomari is an annual plant belonging to the Asteraceae family and is one of the commonly used folk medicinal herbs. Also called 'Changja', it is known to be effective in antipyretic, sweating, antispasmodic, cold and cold headache, rhinitis, sinusitis, rheumatism, atopy, allergies, bruises, and dermatitis. Dokomari is an annual herb in the family Compositae, about 1m high, and has hairs along with leaves. The leaves are alternate, long infestation and 5-10cm long. Flowers bloom in August-September, yellow flowers, cone-shaped at the tip of branches and main stems, with male and female flowers. Male flowers have a round capillary inflorescence and hang at the tip. There is a dog bump. The gun (總苞) has hook-like protrusions, is oval, and is about 1cm long. It contains two fruit trees (瘦果). The fruit matures in September, and the fruit has hook-like protrusions on the outside, so it attaches well to objects. In addition, young shoots are edible and the fruits (intestinal lice) are relieved of pain (鎭痛), stinging (丁腫), golden spear (金瘡), poisoning (蟲毒), dropsy (水腫), drainage (排膿), hemorrhoids, tonsillitis, paralysis , rabies, eczema, sweating, syphilis, arthritis, detoxification, diuresis, postpartum pain, toothache, neck pain, narcolepsy, and headache. Mainly made sterilizing plasters and antiseptic plasters and used for eczema, lichen, sun disease, boils, pimples, smallpox, and marine dermatitis.

In particular, the main components of the extract is xanthosturumarin and linoleic acid, which helps to relieve itching of skin diseases. It can be expected to have a useful effect on sexual skin diseases.

Lacquer is extracted from the lacquer tree and is a natural material that is harmless to the human body and contains a large amount of urushiol. Urushiol exists as a colorless and transparent liquid at room temperature, but when it comes into contact with air, it turns black due to the action of oxidase and becomes lacquer. Such urushiol, that is, lacquer, has high hardness and beautiful luster, does not change even after long storage, is very strong against acids and alkalis, and does not change even against heat of 70℃ or higher. It exhibits a deep and calm luster, has a high antiseptic effect, so it has good sterilization power and does not cause mold even after a long period of time.

In the present invention, it is characterized in that one or more types extracted from green tea, ginseng, porcini or lacquer are used so as to provide high-efficiency antibacterial and deodorizing effects.

On the other hand, for the graphene and synthetic resin hybrid composite fiber containing the plant extract of the present invention, 10% by weight of the graphene powder having an average atomic layer thickness of 10 layers is added to purified water and put into a ball mill together with zirconia beads having an average size of 10 μm 24 After operating the ball mill for a period of time, filtering to prepare an aqueous solution of graphene; Preparing a plant extract by adding 10% by weight of one or more plants selected from ginseng, green tea, larvae, or lacquer to a 50:50 volume ratio of ethanol and water, extracting with heat for 24 hours, and then filtering; Preparing a plant extract-containing graphene powder by drying the mixed solution of the prepared graphene aqueous solution and the prepared plant extract while spraying it through a nozzle of a hot air dryer at 120° C.; Mixing 0.02 to 2.0 parts by weight of the graphene powder containing the plant extract prepared above per 100 parts by weight of the synthetic resin to prepare a spinning solution containing 0.01 to 1.0 parts by weight of graphene and a plant extract, respectively, and melt spinning; Manufacturing comprising; It can be prepared by the method, in this case, the synthetic resin is preferably selected from PET, PP or nylon.

[Preparation of graphene]

300 g of graphene powder having an average atomic layer thickness of 10, purchased from Nano Reader Co., Ltd., was put into 2,700 g of purified water (so that it was 10 wt%), and then put into a ball mill together with zirconia beads having an average size of 10 μm, and then put into a ball mill for 24 hours. After operation, it was filtered to prepare an aqueous solution of graphene having a solid content of 10% by weight.

After diluting the prepared graphene aqueous solution sufficiently to reach a nano-dispersion state, analysis with a high-resolution transmission electron microscope (HRTEM) with a resolution of 0.1 nm shows an image showing a unique diffraction pattern generated from the lattice of single-layer graphene. Confirmed.

Separately, as a result of analysis with a transmission electron microscope (HRTEM) having a resolution of 2 nm, it was confirmed that the plane size of graphene was distributed in the range of 10 to 100 nm.

In addition, as a result of analysis by atomic force microscopy (AFM), it was confirmed that the plane thickness of graphene was divided into the range of 1 to 5 atomic layers.

[Production of plant extracts]

Green tea and lacquer in the same weight ratio were added to a mixed solution of 50:50 volume ratio of ethanol and water so as to be 10% by weight, followed by heating and extraction for 24 hours, followed by filtration to prepare a plant extract.

[Production of graphene powder containing plant extract]

The graphene aqueous solution prepared in [Example 1] and the mixed solution of the plant extract prepared in [Example 2] were dried while spraying through a nozzle of a hot air dryer at 120° C. to prepare a plant extract-containing graphene powder did.

[Production of graphene and synthetic resin hybrid composite fiber containing plant extract]

2.0 parts by weight of the graphene powder containing the plant extract prepared above per 100 parts by weight of the PET resin was mixed to prepare a spinning solution containing 1.0 parts by weight of graphene and a plant extract, respectively, and melt-spun to prepare a hybrid composite fiber.

(Comparative Example 1)

[Production of PET fiber]

Fibers were prepared by spinning only with PET resin.

(Comparative Example 2)

[Manufacturing graphene/PET composite fiber]

By spray drying the graphene aqueous solution of [Example 1] (without green tea extract), graphene powder was prepared as in [Example 3], and fibers were prepared as in [Example 4].

[Measurement of electrical conductivity and tensile strength]

Each of the graphene and synthetic resin hybrid composite fiber containing the plant extract prepared in [Example 4] and the PET fiber and graphene/PET composite fiber prepared in [Comparative Example 1] and [Comparative Example 2] respectively Conductivity and tensile strength were measured, and the results are shown in [Fig. 1] and [Fig. 2].

As shown in [FIG. 1] and [FIG. 2], the graphene and synthetic resin hybrid composite fiber containing plant extract and the graphene/PET composite fiber exhibit almost the same electrical conductivity and tensile strength, but the PET fiber It can be seen that the strength and electrical conductivity are remarkably low, so it can be confirmed that the electrical conductivity and tensile strength of graphene are reinforced.

[Measurement of antibacterial and deodorant effect]

The antibacterial and deodorizing effects of the graphene and synthetic resin hybrid composite fibers containing the plant extract of the present invention prepared in [Example 4] were measured at the Korea Apparel Testing & Research Institute, and the test reports were presented [Fig. 3] to [Fig. 4] shown in

As shown in [Fig. 3] to [Fig. 4], it can be confirmed the antibacterial and deodorizing effect of the graphene and synthetic resin hybrid composite fiber containing the plant extract of the present invention.

The above description is merely illustrative of the technical idea of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments and/or drawings disclosed in the present invention are for explanation rather than limiting the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and/or drawings. . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (7)

A plant extract, characterized in that it is prepared by melt spinning a composition comprising 0.01 to 1.0 parts by weight of graphene and 0.01 to 1.0 parts by weight of a plant extract per 100 parts by weight of the synthetic resin to exhibit electrical conductivity, tensile strength, antibacterial and deodorizing performance Graphene and synthetic resin hybrid composite fiber containing
According to claim 1,
The graphene has an average thickness of 1 to 5 atomic layers, and graphene and synthetic resin hybrid composite fiber containing a plant extract, characterized in that the average plane size is 10 to 100 nm
According to claim 1,
The synthetic resin is a graphene and synthetic resin hybrid composite fiber containing a plant extract, characterized in that selected from PET, PP or nylon
According to claim 1,
The plant extract is a graphene and synthetic resin hybrid composite fiber containing a plant extract, characterized in that at least one extracted from ginseng, green tea, larvae or lacquer
According to claim 1,
Graphene and synthetic resin hybrid composite fiber containing a plant extract, characterized in that the average diameter of the filaments constituting the composite fiber is 1 to 100 ㎛
Putting graphene powder having an average atomic layer thickness of 10 layers in purified water so as to be 10% by weight in purified water, putting it in a ball mill together with zirconia beads having an average size of 10 μm, operating the ball mill for 24 hours, and then filtering to prepare an aqueous solution of graphene; Preparing a plant extract by adding 10% by weight of one or more plants selected from ginseng, green tea, porcupine, or lacquer to a mixed solution of ethanol and water in a 50:50 volume ratio, followed by heating and extraction for 24 hours, followed by filtration; Preparing a plant extract-containing graphene powder by drying the mixed solution of the prepared graphene aqueous solution and the prepared plant extract while spraying it through a nozzle of a hot air dryer at 120° C.; Mixing 0.02 to 2.0 parts by weight of the graphene powder containing the plant extract prepared above per 100 parts by weight of the synthetic resin to prepare a spinning solution containing 0.01 to 1.0 parts by weight of graphene and a plant extract, respectively, and melt spinning; Method for producing graphene and synthetic resin hybrid composite fiber containing the plant extract according to any one of claims 1 to 5, characterized in that
7. The method of claim 6,
The synthetic resin is a method for producing a graphene and synthetic resin hybrid composite fiber containing a plant extract, characterized in that it is selected from PET, PP or nylon

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