WO2021137560A1 - Graphène, composition de graphène, procédé de préparation de fibre de graphène l'utilisant et fibre de graphène préparée par le même procédé de préparation - Google Patents

Graphène, composition de graphène, procédé de préparation de fibre de graphène l'utilisant et fibre de graphène préparée par le même procédé de préparation Download PDF

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WO2021137560A1
WO2021137560A1 PCT/KR2020/019224 KR2020019224W WO2021137560A1 WO 2021137560 A1 WO2021137560 A1 WO 2021137560A1 KR 2020019224 W KR2020019224 W KR 2020019224W WO 2021137560 A1 WO2021137560 A1 WO 2021137560A1
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graphene
group
substituted
unsubstituted
formula
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Korean (ko)
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박선찬
신규순
강양원
김형철
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주식회사 동진쎄미켐
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Publication of WO2021137560A1 publication Critical patent/WO2021137560A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/15—Nano-sized carbon materials
    • C01B32/182—Graphene
    • C01B32/194—After-treatment
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties

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  • the present invention relates to a functionalized graphene including a substituent, a graphene composition including the same, a method for manufacturing a graphene fiber using the same, and a graphene fiber prepared by the manufacturing method.
  • graphene has excellent structural and chemical stability and thermal conductivity. In addition, it is easy to process a one-dimensional or two-dimensional nanopattern because it is made of only carbon, a relatively light element. Due to these electrical, structural, chemical, and economical characteristics, graphene is expected to be able to replace silicon-based semiconductor technology and transparent electrodes in the future, and its excellent mechanical properties are expected to be applicable to flexible electronic devices.
  • the hydrophobic portion of the dispersant adsorbs to the graphene surface, and the hydrophilic portion suppresses the aggregation of adjacent graphenes, thereby dispersibility in a solvent.
  • a method for improving the However, this method has a disadvantage in that it is difficult to maintain the dispersibility of graphene for a long time because it is a physical bond between graphene and a dispersant.
  • a graphene oxide solution or a reduced graphene oxide solution was used as a source (hereinafter, also referred to as a “dispersion”).
  • a pure graphene oxide solution is used as a source, many defects occur during the heat treatment process during the graphene fiber manufacturing process, and the porosity of the graphene fiber manufactured in this way increases, resulting in lowered mechanical, thermal, and electrical properties.
  • a high content of additives is essential, and it is difficult to prepare a source solution having uniform dispersibility, and the graphene fibers prepared in this way are not dense and have a rough surface. As a result of poor orientation, there was a problem in that mechanical, thermal, and electrical properties were deteriorated.
  • an object of the present invention is to provide graphene having excellent dispersibility by being functionalized with a positive charge in a dispersion.
  • One aspect of the present invention provides one or more substituents, wherein the substituents each independently include an ether group and one or more amine groups, graphene.
  • Another aspect of the present invention provides a graphene composition comprising graphene according to an embodiment of the present invention.
  • Another aspect of the present invention comprises the steps of preparing graphene according to an embodiment of the present invention; preparing a dispersion in which the prepared graphene is dispersed; and spinning the prepared dispersion into a coagulation bath to prepare graphene fibers, providing a graphene fiber manufacturing method and graphene fibers prepared thereby.
  • Graphene according to an embodiment of the present invention exhibits excellent dispersibility in a dispersion mixed with a solvent. Therefore, in the case of manufacturing the graphene fibers using the same, graphene fibers having a uniform surface and shape can be manufactured, and defects that may occur during the heat treatment process can be reduced, thereby manufacturing the graphene fibers having a low porosity. Since the graphene fibers prepared in this way are dense and compressed, they can exhibit excellent mechanical, electrical and thermal properties. Due to these characteristics, the graphene fiber produced by the present invention can be used as a reinforcing material for improving plastic strength, and can also be applied to lightweight materials such as automobiles, airplanes, and leisure articles.
  • FIG. 1 is a schematic diagram showing a method of manufacturing a graphene fiber according to an embodiment of the present invention.
  • One aspect of the present invention provides graphene, including one or more substituents, wherein the substituents each independently include one or more ether groups and one or more amine groups.
  • graphene may refer to a semi-metallic material having a thickness corresponding to a carbon atomic layer while forming an arrangement in which carbon atoms are connected in a hexagonal shape by sp 2 bonds in two dimensions.
  • the graphene may include graphene, graphene oxide (GO), reduced graphene oxide (rGO), graphene nanoflats (GNP), and the like.
  • the substituent including at least one ether group and at least one amine group may be represented by the following formula (1).
  • A is N, O, S, P, Si or Se, and specifically, may be N.
  • Such A may act as a nucleophile, and is a material having excellent reactivity, and may react with an epoxide of graphene and the like so that a substituent of 1 can be bonded to graphene in chemistry.
  • A when A is N, it is positively charged in the dispersion, thereby further improving the dispersibility of graphene.
  • H is hydrogen
  • m may be an integer of 0 to 2, and may vary depending on A.
  • an asterisk (*) indicates a binding site of a substituent, and may specifically indicate a site bonded to graphene, and more specifically, a site where a ring such as an epoxide of graphene is bonded to an open site.
  • B may be an n-valent organic group, where n may be an integer of 2 to 10. Specifically, B may be a substituted or unsubstituted hydrocarbon group having 1 to 10 carbon atoms.
  • B may be any one of the following specific formulas.
  • any one of the asterisks (*) may represent a site bound to A of Formula 1, and the rest may represent a site to which D of Formula 1 is bound.
  • n-1 numbers of D may be bonded to B, respectively.
  • the substituent of B is hydrogen, deuterium, halogen, amino group, cyano group, nitrile group, nitro group, C 1 ⁇ 30 alkyl group, C 2 ⁇ C 30 alkenyl group, C 1 ⁇ C 30 alkoxy group, C 3 ⁇ C 20 cyclo It may be one selected from the group consisting of an alkyl group, a C 3 -C 20 heterocycloalkyl group, a C 1 -C 30 sulfide group, a C 6 -C 30 aryl group, and a C 2 -C 30 heteroaryl group.
  • one or a plurality of D may each independently include one or more ether groups and terminal amine groups, and may be specifically represented by Chemical Formula 2 below.
  • an asterisk (*) represents a binding site of a substituent, and may specifically represent a site coupled to B of Formula 1 above.
  • O oxygen
  • C carbon
  • N nitrogen
  • R is each independently hydrogen, deuterium, halogen, amino group, cyano group, nitrile group, nitro group, substituted or unsubstituted C 1 ⁇ C 30 alkyl group, substituted or unsubstituted C 2 ⁇ C 30 Alkenyl group, substituted or unsubstituted C 2 ⁇ C 30 alkynyl group, substituted or unsubstituted C 1 ⁇ C 30 alkoxy group, substituted or unsubstituted C 3 ⁇ C 20 cycloalkyl group, substituted or unsubstituted C 3 ⁇
  • One selected from the group consisting of a C 20 heterocycloalkyl group, a substituted or unsubstituted C 1 ⁇ C 30 sulfide group, a substituted or unsubstituted C 6 ⁇ C 30 aryl group, and a substituted and unsubstituted C 2 ⁇ C 30 heteroaryl group can be
  • R 1 and R 2 are each independently, a substituted or unsubstituted C 1 ⁇ C 30 alkyl group, a substituted or unsubstituted C 2 ⁇ C 30 alkenyl group, a substituted or unsubstituted C 2 ⁇ C 30 alkynyl group, substituted or unsubstituted C 1 ⁇ C 30 alkoxy group, substituted or unsubstituted C 3 ⁇ C 20 cycloalkyl group, substituted or unsubstituted C 3 ⁇ C 20 heterocycloalkyl group, substituted or unsubstituted C 1 ⁇ C 30 It may be one selected from the group consisting of a sulfide group, a substituted or unsubstituted C 6 ⁇ C 30 aryl group, and a substituted and unsubstituted C 2 ⁇ C 30 heteroaryl group.
  • the substituted or unsubstituted C 1 ⁇ C 30 alkyl group may be straight-chain or branched, for example, a methyl group, an ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, t- It may include a butyl group and a 1-methylbutyl group.
  • the substituted or unsubstituted C 2 ⁇ C 30 alkenyl group may include, for example, an ethenyl group, a propenyl group, and a 2-butenyl group.
  • the substituted or unsubstituted C 2 ⁇ C 30 alkynyl group may include, for example, an ethynyl group, a propynyl group, and a 2-butynyl group.
  • the substituted or unsubstituted C 3 ⁇ C 20 cycloalkyl group may include, for example, a cyclopentyl group, a cyclohexyl group, and a 3-methylcyclohexyl group.
  • the substituted or unsubstituted C 3 ⁇ C 20 heterocycloalkyl group may include one or more hetero atoms selected from O, S and N, and may include, for example, tetrahydrofuran, tetrahydropyran and piperidine. .
  • the substituted or unsubstituted C 3 ⁇ C 10 cycloalkenyl group may include, for example, a 2-cyclohexenyl group.
  • the substituted or unsubstituted C 1 ⁇ C 10 heterocycloalkynyl group may include one or more hetero atoms selected from O, S and N.
  • the substituted or unsubstituted C 6 ⁇ C 30 aryl group may include, for example, a phenyl group, a benzyl group, a methylphenyl group, and a naphthyl group.
  • R may be hydrogen
  • R 1 and R 2 may each independently be any one of the following specific formulas.
  • the number of D may be 1 to (n-1), and when the number of D is two or more, each D may be the same or different from each other.
  • a may be an integer of 1 to 6.
  • y may be an integer of 1 to 99, specifically, an integer of 1 to 50, more specifically, an integer of 1 to 30, and more specifically, an integer of 1 to 10.
  • —(OC a R 2a ) y — in —(OC a R 2a ) — is each independently , , or can be
  • the ⁇ (OC a R 2a ) ⁇ may be included in one or two or more, and when there are two or more ⁇ (OC a H 2a ) ⁇ , each ⁇ (OC a R 2a ) ⁇ is each other may be the same or different.
  • the graphene of the present invention including such a substituent includes at least one amine group, thereby having a positive charge in the dispersion to improve the dispersibility of the graphene, and the graphene fiber prepared in this way has excellent mechanical, thermal and electrical properties can make it
  • Chemical Formula 1 may be represented by any one of Chemical Formulas 3 to 7 below.
  • graphene functionalized including a substituent may be functionalized in an amount of 1% to 90%, specifically 10% to 60%, based on the oxygen content of graphene.
  • the graphene composition may be a dispersion in which the graphene of the present invention is dispersed, and may be a source solution that can be used in manufacturing the graphene fibers.
  • the functionalized graphene may be included in an amount of 0.5 wt% to 3 wt% based on the total weight of the composition. More specifically, it may be 1 wt% to 3 wt%. If the functionalized graphene exceeds 3% by weight, a problem may occur that the viscosity of the dispersion becomes excessively high, and if it is less than 0.5% by weight, the concentration of functionalized graphene is low, so that the graphene fibers are not arranged in a fiber form. problems may arise.
  • the graphene composition may include functionalized graphene including a substituent and a solvent, and may further include a pH adjusting agent if necessary.
  • the solvent may be used for dispersing the functionalized graphene, and specifically, a polar solvent, for example, water, distilled water, or alcohol may be used, but is not particularly limited.
  • a polar solvent for example, water, distilled water, or alcohol may be used, but is not particularly limited.
  • the pH adjusting agent may be added to the functionalized graphene to have a higher positive charge in the composition (dispersion), and HCl, H 2 SO 4 , HNO 3 and CH 3 COOH, etc. may be used. By adding such a pH adjusting agent, the pH of the graphene composition can be set to 8 or less, specifically 7 or less.
  • the graphene composition may further add an additive.
  • the additive may include a dispersant and a polymer for preventing stacking.
  • the dispersant may be a surfactant, and more specifically, may be a surfactant different from the anionic surfactant, but is not particularly limited thereto, and polyvinylpyrrolidone (PVP) or sodium dodecyl sulfate (sodium). dodecyl sulfate (SDS) and the like may be used.
  • PVP polyvinylpyrrolidone
  • SDS dodecyl sulfate
  • Another aspect of the present invention provides a method for producing a graphene fiber.
  • FIG. 1 is a schematic diagram showing a method of manufacturing a graphene fiber according to an embodiment of the present invention.
  • the method of manufacturing the graphene fibers of the present invention may be a method of manufacturing through a wet spinning method.
  • the method for producing a graphene fiber of the present invention includes the steps of preparing functionalized graphene including a substituent (S100), preparing a dispersion in which the prepared graphene is dispersed (S200), and coagulating the dispersion. It may be carried out including the step (S300) of producing a graphene fiber by spinning into the bath.
  • the step of preparing graphene (S100) includes preparing a mixture by mixing graphene, an amine compound for functionalizing the graphene, and a solvent (S110) and heat-treating the mixture (S120) can proceed.
  • graphene may include graphene, graphene oxide (GO) and reduced graphene oxide (rGO), graphene nanoflat (GNP), but specifically, It may be graphene oxide (GO).
  • the amine compound may be represented by the following Chemical Formula 1' corresponding to Chemical Formula 1 above.
  • the solvent may be used for uniform mixing of the graphene and the amine compound.
  • the solvent may be a polar solvent, for example, water, distilled water, or alcohol, but is not particularly limited thereto.
  • This solvent is removed in the step (S120) of heat-treating the mixture, or after the step (110) of preparing the mixture, before the step (S120) of heat-treating the mixture, the step (S115) of removing the solvent is further performed.
  • the step of removing the solvent ( S115 ) may include a process of washing or filtering to remove materials such as a solvent other than the functionalized graphene.
  • the step (S120) of heat-treating the mixture is a step of performing functionalization of graphene, at 50°C to 400°C, specifically, at 50°C to 300°C, for 10 minutes to 200 hours, specifically, 30 minutes to 120 hours. can be performed while
  • the graphene prepared in this way is the same as the graphene of the present invention described above.
  • the step of preparing the dispersion (S200) may be performed including the step of preparing a dispersion in which the graphene prepared in the step (S100) of preparing the graphene is dispersed in a solvent.
  • a dispersion is prepared by mixing functionalized graphene and a solvent, and if necessary, a pH adjusting agent may be additionally added.
  • the solvent may be used for dispersing the functionalized graphene, and specifically, a polar solvent, for example, water, distilled water, or alcohol may be used, but is not particularly limited.
  • a polar solvent for example, water, distilled water, or alcohol may be used, but is not particularly limited.
  • the pH adjusting agent may be added to the functionalized graphene to have a higher positive charge in the composition (dispersion), and HCl, H 2 SO 4 , HNO 3 and CH 3 COOH, etc. may be used.
  • the pH of the dispersion can be set to 8 or less, specifically 7 or less.
  • the graphene may be in an amount of 0.5 wt% to 3 wt%, specifically, 1 wt% to 3 wt%, based on the total weight of the dispersion. If the functionalized graphene exceeds 3% by weight, a problem may occur that the viscosity of the dispersion becomes excessively high, and if it is less than 0.5% by weight, the concentration of functionalized graphene is low, so that the graphene fibers are not arranged in a fiber form. problems may arise.
  • the dispersion of the present invention includes functionalized graphene, even when a separate dispersant is not used or a very small amount of dispersant is used compared to the conventional one, it can exhibit significantly improved dispersibility in a solvent.
  • the step of preparing the graphene fiber (S300) may be performed including the step of preparing the graphene fiber by spinning the dispersion prepared in the step of preparing the dispersion (S200) into the coagulation bath.
  • the coagulation bath serves to aggregate the functionalized graphene dispersed in the dispersion including the anionic compound, and may specifically include an anionic compound and a solvent. As the dispersion is spun into the coagulation bath, it is possible to form graphene fibers in the form of fibers.
  • the anionic compound may be used without particular limitation as long as it is a compound having a negative charge, and specifically, an anionic surfactant or an anionic polymer may be used.
  • the anionic surfactant is ammonium dodecyl sulfate (ADS), sodium dodecyl sulfate (SDS), sodium lauryl ether sulfate (SLES), sodium lauryl sarcozy It may be at least one selected from the group consisting of sodium lauroyl sarcosinate, polysorbate, and octylphenol ethoxylate.
  • the anionic polymer may be polyvinyl alcohol (PVA).
  • anionic compounds may be included in an amount of 0.005 wt% to 10 wt% based on the total weight of the coagulation bath. When the amount of the anionic compound exceeds 10% by weight, there may be a problem that the anionic compound is not dissolved in the solvent.
  • the solvent may be a polar solvent, for example, water, distilled water, or alcohol, but is not limited thereto.
  • the step of heat-treating the manufactured graphene fiber (S400) may be further performed.
  • the heat treatment may be performed by giving one or more steps at the same or different temperatures.
  • the heat treatment temperature may be 100° C. to 3,000° C., specifically, 400° C. to 2,900° C.
  • the heat treatment holding time may be performed from 30 minutes to 5 hours
  • the heat treatment atmosphere may be performed in a nitrogen or argon atmosphere, but , but is not particularly limited thereto.
  • Another aspect of the present invention provides a graphene fiber prepared by the method for producing the graphene fiber of the present invention described above.
  • the graphene fiber of the present invention may have a tensile strength of 500 MPa or more, specifically 600 MPa or more, and more specifically 700 MPa or more.
  • Electrical conductivity may be 0.6X10 6 S/m or more, specifically 0.7X10 6 S/m or more.
  • the thermal conductivity may be 500 W/mK or more, specifically 600 W/mK or more.
  • Graphene oxide was prepared using the Hummer's method of treating graphite with sulfuric acid and potassium permanganese. After purification, the prepared graphene oxide (GO) was placed in distilled water and probe sonic treatment was performed for 30 minutes to prepare a dispersion containing 1.5% by weight of graphene oxide.
  • Reduced graphene oxide powder and additive PVP (5% by weight) were added to distilled water and probe sonic treatment was performed for 20 minutes to prepare a dispersion having reduced graphene oxide of 1.5% by weight.
  • the reduced graphene oxide (rGO), additive SDS (5% by weight) and PVP (5% by weight) prepared in Comparative Example 2 were added to distilled water, and the reduced graphene oxide was treated with probe sonic for 20 minutes. A dispersion of 1.5% by weight was prepared.
  • the reduced graphene oxide (rGO) and additive SDS (5% by weight) prepared in Comparative Example 2 were added to distilled water, and a probe sonic treatment was performed for 20 minutes to prepare a dispersion in which the reduced graphene oxide was 1.5% by weight did.
  • the graphene oxide prepared in Comparative Example 1 was added to distilled water to prepare an aqueous solution of graphene oxide of 0.4% by weight. Then, 4% by weight of 1,3-propylamine (Samjeon Pure Chemical) was added. The mixed solution was stirred at 100° C. for 120 hours. After completion of the reaction, unreacted amines and impurities in the solution were removed by centrifugation and dialysis purification.
  • the purified amine-functionalized graphene oxide was redispersed in distilled water to prepare a dispersion in which the purified amine-functionalized graphene oxide was 1.5% by weight, and 0.5 to 3 g of HCl 0.1M was further added to the dispersion to obtain the pH of the final dispersion. was prepared to be 8 or less.
  • the graphene oxide prepared in Comparative Example 1 was added to distilled water to prepare an aqueous solution of graphene oxide of 0.4% by weight. Then, 4 wt% of triethylene glycol (Comparative Example 6) or Triethylene glycol monomethyl ether (Comparative Example 7) was added. The mixed solution was stirred at 100° C. for 120 hours. After completion of the reaction, unreacted ether and impurities in the solution were removed by centrifugation and dialysis purification. The purified ether-functionalized graphene oxide was redispersed in distilled water to prepare a dispersion in which the purified amine-functionalized graphene oxide was 1.5 wt%.
  • a dispersion in which the functionalized graphene oxide was 1.5 wt% was prepared in the same manner as in Comparative Example 5, except that the added amine compound was replaced with the amine compound shown in Table 1 below.
  • a functionalized graphene oxide dispersion was prepared in the same manner as in Example 1, except that the content of the functionalized graphene oxide in the dispersion was adjusted to the content shown in Table 1 below.
  • CAB cetyl trimethyl ammonium bromide
  • Each of the dispersions prepared in Comparative Examples 1 to 7 and Examples 1 to 8 was put into a syringe, and a needle was connected and installed in a syringe pump.
  • the prepared coagulation tank 1 or coagulation tank 2 was put into the coagulation tank, and the needle was put into the coagulation tank.
  • coagulation bath 1 was used, and in Comparative Examples 5 and 1 to 8, coagulation bath 2 was used.
  • the syringe pump was spun into the coagulation bath at a rate of 150ml/h, and the obtained graphene fibers were connected to each wheel and wound.
  • the wound graphene fibers were washed with water and then dried at room temperature for 24 hours.
  • Tensile strength, electrical conductivity and thermal conductivity of each graphene fiber prepared in Preparation Example 4 were measured.
  • Tensile strength was measured with a universal material testing machine (Instron-5543, Instron), and electrical conductivity was measured using an electrical conductivity measuring device (Keithly 2400, Keithly Instruments) in a 4-point method.
  • the thermal conductivity was converted into a thermal conductivity value by measuring the temperature change of the grounded part of the sample according to time after flowing a certain amount of current to the heating element. The results are shown in Table 2 below.
  • Comparative Example 1 which is a dispersion containing graphene oxide (GO), was used, mechanical, electrical, and thermal properties were all low. This can be expected because the porosity increased due to acid radicals and defects during heat treatment after manufacturing the graphene fibers.
  • Comparative Examples 3 and 4 which are dispersions containing reduced graphene oxide (rGO), were used, all of the mechanical, electrical and thermal properties were low. This can be expected because a high content of additives is included and it is difficult to obtain a uniform dispersion, because the surface of the graphene fibers is rough and the fibers are not dense. In the case of Comparative Example 2, it could be seen that the dispersibility of the reduced graphene oxide (rGO) was too low, so that the graphene fibers were not formed at all.
  • Comparative Examples 6 and 7 which are dispersions containing ether-functionalized graphene oxide, were used, as in Comparative Example 1, mechanical, electrical and thermal properties were all low. This can be expected because the porosity increased due to acid radicals and defects during heat treatment after manufacturing the graphene fibers.
  • Example 5 which is a dispersion containing graphene oxide functionalized with an amine
  • Example 5 which is a dispersion containing functionalized graphene oxide in an amount of 3% by weight based on the total weight of the dispersion, was used, it was also confirmed that the tensile strength, electrical conductivity and thermal conductivity were the best.
  • Example 8 when 3.5wt% functionalized graphene oxide was used as in the case of Example 8, the stability of the dispersion increased and the stability was lowered and relatively non-uniform. Compared to Example 5 when manufacturing the fiber, the tensile strength, electrical conductivity, and thermal conductivity were considered to be low. When the concentration of the dispersion is low as in the case of Examples 6 and 7, it is determined that the tensile strength, electrical conductivity, and thermal conductivity are low compared to Example 1 because the force to coagulate with each other in the coagulation bath during fiber production is low.
  • the thermal conductivity of pitch carbon fiber on the market is 200 ⁇ 600 W/mK for each product grade
  • the graphene fiber with thermal conductivity of 600 W/mK or more in this patent is expected to serve as a heat dissipation material.
  • the functionalized graphene oxide exhibits excellent dispersion in the dispersion, and when graphene fibers are prepared using the same, the surface and shape of the prepared graphene fibers may be uniform. In addition, by reducing defects that may occur during the heat treatment process, it is possible to prepare graphene fibers having a low porosity as a result.
  • the reduced graphene oxide (rGO) is dispersed by functionalizing the graphene oxide with a functional group containing an ether group and an amine group as in the examples of the present invention rather than a dispersion in which a surfactant such as SDS or PVP is dispersed. Since the dispersibility was better in the dispersion, it was confirmed that the tensile strength, electrical conductivity, and thermal conductivity of the graphene fibers prepared in this way all had excellent values.

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Abstract

La présente invention concerne un graphène, une composition de graphène le comprenant, un procédé de préparation d'une fibre de graphène l'utilisant et une fibre de graphène préparée par le procédé de préparation. Le graphène de la présente invention comprend un substituant contenant au moins un groupe éther et au moins un groupe amine.
PCT/KR2020/019224 2019-12-31 2020-12-28 Graphène, composition de graphène, procédé de préparation de fibre de graphène l'utilisant et fibre de graphène préparée par le même procédé de préparation WO2021137560A1 (fr)

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