Mxene surface-modified with metal alkoxide, and manufacturing method therefor

Abstract

Disclosed is MXene surface-modified with metal alkoxide, which is formed by surface-modifying, with metal alkoxide, MXene represented by chemical formula 1, wherein metal alkoxide is covalently bonded to the surface of the MXene so as to be present as a ligand. [In chemical formula 1] M n+1 X n , where M is a transition metal element selected from the group consisting of Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, Hf, and Ta, X is carbon and / or nitrogen, and n is an integer of 1 to 4.

Description

MXene surface-modified with metal alkoxide and method for producing the same

[0001] The present invention relates to a MXene surface-modified with a metal alkoxide and dispersed in a polar organic solvent as well as a non-polar organic solvent, a method for producing the same, and a use thereof.

[0002] MXene is a two-dimensional planar ceramic material composed of transition metals bonded to carbon or nitrogen. The process of converting a three-dimensional MAX phase into a two-dimensional MXene involves an etching process using a strong acid. As a result of the etching process, terminal groups such as hydroxyl (OH) and oxidizing groups (-O) remain on the surface of the MXene. Therefore, MXene has attracted attention as a material that possesses electrical conductivity due to the transition metal, as well as hydrophilicity due to the functional groups present at the terminals.

[0003] To apply hydrophilic MXenes to various industries, active research is currently underway to disperse them in various organic solvents. In particular, the development of high-performance MXene materials that maintain high electrical conductivity while stably dispersing them in various organic solvents remains a challenging task. Furthermore, there is a pressing need for technology to manufacture organic dispersion inks from MXenes optimized for conductive ink-based industries, such as the printing and battery industries.

[0004] The MXene organic inks developed to date are primarily dispersed in polar organic solvents, with electrical conductivities ranging from tens to thousands of S / cm. However, for broader industrial applications, they require dispersion in nonpolar organic solvents. MXene inks dispersed in nonpolar organic solvents exhibit electrical conductivities ranging from tens to hundreds of S / cm, significantly lower than those dispersed in polar organic solvents.

[0005] The purpose of the present invention is to provide a MXene that is stably dispersed in not only polar organic solvents but also non-polar organic solvents, and a method for producing the same, in order to solve the above problems.

[0006] In addition, an object of the present invention is to provide a MXene and a method for producing the same that exhibit a higher level of electrical conductivity than conventional ones even in a non-polar organic solvent in order to solve the above-mentioned problem.

[0007] In addition, the present invention provides a conductive film and polymer composite using MXene.

[0008] In addition, the present invention provides an electromagnetic shielding material produced based on a conductive film and polymer composite using maxine.

[0009] In order to achieve the above object of the present invention, the present invention discloses a metal alkoxide-surface-modified MXene, which is formed by surface-modifying a MXene represented by the following chemical formula 1 with a metal alkoxide, wherein the alkoxide is covalently bonded to the surface of the MXene and exists as a ligand.

[0010] [Chemical Formula 1]

[0011]

[0012] Here, M is a transition metal element selected from the group consisting of Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, Hf, and Ta, X is at least one of carbon (C) and nitrogen (N), and n is an integer from 1 to 4.

[0013] The metal of the above metal alkoxide includes an alkali metal. In addition, the alkyl group or aryl group of the alkoxide is in the form of a carbon chain or a carbon ring, and the alkoxide may further include an element selected from the group consisting of halogen elements (F, Cl, Br, I), nitrogen (N), sulfur (S), and silicon (Si).

[0014] A method for manufacturing a MXene surface-modified with a metal alkoxide comprises the steps of: preparing a MXene solution dispersed in a first solvent; introducing a metal alkoxide into a second solvent and stirring it; and mixing the solutions produced in the preparing step and the stirring step, and stirring them for a predetermined time or longer to modify the surface of the MXene with the metal alkoxide.

[0015] The first solvent and the second solvent include at least one selected from the group consisting of DMSO (Dimethyl Sulfoxide), DMF (dimethylformamide), NMP (N-Methyl-2-pyrrolidone), PC (propylene carbonate), toluene, and hexane.

[0016] After the above modifying step, a step of dispersing the MXene surface-modified with the metal alkoxide in an organic solvent selected from the group consisting of ethyl alcohol, isopropyl alcohol, acetonitrile, acetone, ethyl acetoacetate, diethyl ether, chloroform, toluene, and dichlorobenzene to obtain a MXene organic ink is further performed.

[0017] The range of the concentration of the maxine solution in the above preparation step is 0.01 to 100 mg / mL.

[0018] The amount of the above Maxine When mg, the amount of metal alkoxide used in the stirring step is ㎕ or It is ㎕.

[0019] The stirring time in the above stirring step ranges from 1 to 300 minutes, and the stirring temperature is 60°C or lower.

[0020] The present invention discloses a MXene organic ink comprising an organic solvent in which the MXene is dispersed, wherein the organic solvent is selected from the group consisting of ethyl alcohol, isopropyl alcohol, acetonitrile, acetone, ethyl acetoacetate, diethyl ether, chloroform, toluene, and dichlorobenzene.

[0021] The concentration of the above-mentioned Maxine organic ink is 0.01 to 100 mg / mL.

[0022] A method for producing a MXene organic ink is disclosed, comprising a step of dispersing a MXene surface-modified with a metal alkoxide in an organic solvent, wherein the organic solvent is selected from the group consisting of ethyl alcohol, isopropyl alcohol, acetonitrile, acetone, ethyl acetoacetate, diethyl ether, chloroform, toluene, and dichlorobenzene.

[0023] An electrically conductive film manufactured by a liquid process including the above-mentioned Maxine organic ink is disclosed.

[0024] An electrically conductive polymer composite comprising the above-described Maxine organic ink is disclosed.

[0025] An electromagnetic shielding material manufactured using the above-mentioned electrically conductive film or the above-mentioned electrically conductive polymer composite is disclosed.

[0026] The effects of the present invention obtained through the above-described solution are as follows.

[0027] The MXene proposed in the present invention is surface-modified with a commercially readily available metal alkoxide, and can be stably dispersed in not only polar solvents but also non-polar organic solvents.

[0028] In addition, the surface-modified MXene proposed in the present invention exhibits a higher level of electrical conductivity than conventional ones even in nonpolar organic solvents.

[0029] In addition, the surface-modified maxine proposed in the present invention can be utilized as an electromagnetic shielding material in the form of a conductive film and a polymer composite.

[0030] The organic ink proposed in the present invention is stably dispersed in both polar and non-polar organic solvents, and thus can be tailored for use in industries requiring various types of organic dispersion inks.

[0031] FIG. 1 is a conceptual diagram illustrating a process for modifying the surface of a MXene with a metal alkoxide according to one embodiment of the present invention.

[0032] FIG. 2 is a conceptual diagram showing a reaction for modifying the surface of a MXene with a metal alkoxide according to one embodiment of the present invention.

[0033] FIG. 3 illustrates an ink in which a MXene modified with a metal alkoxide is dispersed in various organic solvents according to one embodiment of the present invention.

[0034] FIG. 4 is an example of a metal alkoxide for modifying the surface of a maxine according to an embodiment of the present invention.

[0035] FIG. 5 is a flowchart showing a manufacturing process of a MXene surface-modified with a metal alkoxide according to an embodiment of the present invention.

[0036] FIG. 6 is a conceptual diagram illustrating a reaction mechanism for modifying the surface of a MXene with a metal alkoxide according to one embodiment of the present invention.

[0037] FIG. 7 is a photograph showing the electrical conductivity of a MXene surface-modified with ethoxide according to an embodiment of the present invention.

[0038] FIG. 8 is a graph showing the electrical conductivity of MXene surface-modified with NaOEt (sodium ethoxide) according to an embodiment of the present invention, when the MXene is dispersed in a toluene solvent, depending on the amount of NaOEt.

[0039] Hereinafter, the metal alkoxide-surface-modified MXene and its manufacturing method related to the present invention will be described in more detail with reference to the drawings.

[0040] In this specification, identical or similar reference numbers are assigned to identical or similar components even in different embodiments, and redundant descriptions thereof are omitted.

[0041] In describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description is omitted.

[0042] The attached drawings are only intended to facilitate understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0043] In the following description, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0044] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0045]

[0046] Hereinafter, the metal alkoxide-surface-modified MXene and its manufacturing method related to the present invention will be described in more detail with reference to the drawings.

[0047]

[0048] FIG. 1 is a conceptual diagram illustrating a process for modifying the surface of a MXene with a metal alkoxide according to an embodiment of the present invention, and FIG. 2 is a conceptual diagram illustrating a reaction for modifying the surface of a MXene with a metal alkoxide according to an embodiment of the present invention. Hereinafter, the present invention will be described in more detail with reference to FIGS. 1 and 2.

[0049] According to one embodiment of the present invention, a surface-modified MXene with a metal alkoxide is formed by surface-modifying MXene represented by the following chemical formula 1 with a metal alkoxide.

[0050] [Chemical Formula 1]

[0051]

[0052] Here, M is a transition metal element selected from the group consisting of Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, Hf, and Ta, X is at least one of carbon and nitrogen, and n is an integer from 1 to 4.

[0053] Metal alkoxides provide ligands on the surface of surface-modified MXenes. Examples of metal alkoxides include NaOEt and NaOPent. MXenes surface-modified with alkoxide ligands are well dispersed even in nonpolar solvents such as toluene, as confirmed in the photograph in Figure 1.

[0054] Fig. 2 In Fig. 1 (i) NaOEt is shown as an anion form, -OEt(ethoxide), when reacted, and in Fig. 2 In Fig. 1 (ii), the anion form when NaOPent reacts is represented as -OPent (tert-pentoxide).

[0055] In Fig. 2, M represents the transition metal of MXene, and C represents oxygen. The -OH group (hydroxy group) is an arbitrary surface functional group, and in addition to the -OH group, other functional groups such as an oxidizing group (-O) may be attached.

[0056] As shown by the arrows in Figure 2, the unshared electron pairs of the oxygen atoms of ethoxide and tert-pentoxide attack the metal (M) portion of MXene and covalently bond to the surface of the MXene.

[0057]

[0058] FIG. 3 illustrates an ink in which a metal alkoxide-modified MXene is dispersed in various organic solvents according to an embodiment of the present invention. The organic solvents shown in FIG. 3 are as follows.

[0059] EtOH: ethyl alcohol

[0060] IPA: isopropyl alcohol

[0061] MeCN: acetonitrile

[0062] ACT: acetone

[0063] EAA: ethyl acetoacetate

[0064] Ether: diethyl ether

[0065] CHCl3: chloroform

[0066] Tol: toluene

[0067] DCB: dichlorobenzene

[0068] The process of converting a three-dimensional MAX phase into a two-dimensional MXene involves an etching process using a strong acid. As a result of the etching process, terminal groups such as hydroxyl groups (OH) and oxidation groups (-O) remain on the surface of the MXene. Therefore, it is known that the MXene can have hydrophilic properties due to these terminal groups and has the characteristic of being well dispersed in polar solvents.

[0069] Furthermore, the present invention has the characteristic that MXene is well dispersed even in non-polar solvents due to the hydrophobicity of the alkoxide groups covalently bonded to the surface of MXene by modifying the surface of MXene with a metal alkoxide. Referring to Fig. 3, it can be confirmed that MXene surface-modified with a metal alkoxide is well dispersed not only in various polar solvents but also in non-polar solvents.

[0070] In addition, since metal alkoxides are readily commercially available, the present invention has an advantage in the surface modification process of MXene.

[0071]

[0072] FIG. 4 is an example of a metal alkoxide for modifying the surface of a maxine according to an embodiment of the present invention.

[0073] In one embodiment, the metal of the metal alkoxide may include an alkali metal. The alkali metal may be selected from the group consisting of Li (lithium), Na (sodium), K (potassium), Rb (rubidium), Cs (cesium), and Fr (francium). FIG. 4 illustrates examples of alkali metals, including Li (lithium), Na (sodium), and K (potassium).

[0074] In one embodiment, the alkyl group or aryl group of the metal alkoxide is in the form of a carbon chain or a ring. In addition, the metal alkoxide may further include an element selected from the group consisting of a halogen element, nitrogen, sulfur, and silicon.

[0075] In addition, examples of the alkoxide group disclosed in the present invention include methoxide, ethoxide, propoxide, butoxide, pentoxide, and phenoxide (phenolate), as shown in FIG. 4.

[0076] Additionally, instead of the alkoxide group disclosed in the present invention, an enolate anion, which has characteristics of both an alkoxide and a carbanion, may also be used. When the electrons of the enolate anion are localized to an oxygen atom, the surface modification reaction disclosed in the present invention can occur.

[0077]

[0078] Below, a method for manufacturing a MXene surface-modified with a metal alkoxide is described.

[0079] FIG. 5 is a flowchart showing a manufacturing process of a MXene surface-modified with a metal alkoxide according to an embodiment of the present invention.

[0080] (1) Preparation of a MXene solution dispersed in the first solvent (S100)

[0081] Disperse the MXene in a first solvent. The first solvent may include at least one selected from the group consisting of DMSO (Dimethyl Sulfoxide), DMF (dimethylformamide), NMP (N-Methyl-2-pyrrolidone), PC (propylene carbonate), toluene, and hexane.

[0082] The range of the concentration of the MAXINE solution in the step of preparing the above MAXINE solution (S100) is 0.01 to 100 mg / mL.

[0083] The MXene dispersed in the first solvent has already been described with reference to chemical formula 1.

[0084] (2) Add metal alkoxide to the second solvent and stir (S200)

[0085] A metal alkoxide is added to the second solvent and stirred. Examples of the metal alkoxide are shown in Fig. 4, but are not necessarily limited thereto. The alkyl or aryl group of the metal alkoxide is in the form of a carbon chain or a ring, and as previously explained, the metal alkoxide may further include an element selected from the group consisting of halogen elements, nitrogen, sulfur, and silicon.

[0086] The amount of the above Maxine When mg, the amount of metal alkoxide used in the stirring step (S200) is ㎕ or ㎕. For example, if the amount of MAXINE is 30 mg, the amount of appropriate metal alkoxide is 1 ㎕ to 3,000 ㎕.

[0087] (3) Reaction of alkoxide and MXene (S300)

[0088] After mixing the two solutions generated in (1) and (2) above and stirring, the surface of the MXene is modified with a metal alkoxide.

[0089] At this time, the stirring time for the reforming reaction is preferably in the range of 1 minute to 300 minutes. If the stirring time is less than 1 minute, the surface functional groups of MXene are insufficiently replaced by the alkoxide, and if the stirring time exceeds 300 minutes, there is a risk of MXene being damaged by the alkoxide.

[0090] In addition, the stirring temperature for the reforming reaction is preferably a non-heating condition, for example, 60°C or lower, for example, room temperature. This is because if the stirring temperature exceeds 60°C, MXene may be oxidized by the alkoxide.

[0091] Thereafter, the MXene modified with the metal alkoxide is finally transferred to a solvent in which it is to be dispersed, and the MXene contained in the solvent is separated from the solvent in a centrifuge. At this time, the solvent in which it is to be dispersed may be a polar organic solvent or a non-polar organic solvent, and the type thereof may be, but is not necessarily limited to, ethyl alcohol, isopropyl alcohol, acetonitrile, acetone, ethyl acetoacetate, diethyl ether, chloroform, toluene, and dichlorobenzene, or a combination thereof, as shown in FIG. 3.

[0092]

[0093] FIG. 6 is a conceptual diagram illustrating a reaction mechanism for modifying the surface of a MXene with a metal alkoxide according to one embodiment of the present invention.

[0094] The chemical reaction formula in Figure 6 can be expressed as follows.

[0095] Ti-OH + NaOEt -> Ti-OEt + NaOH (byproduct)

[0096] The process of manufacturing a MAX phase into a two-dimensional MXene involves an etching process using a strong acid, which leaves terminal groups such as hydroxyl groups (OH) and oxidation groups (-O) weakly bonded to the transition metal on the surface of the MXene. Since the terminal groups have a higher electronegativity than the transition metal, they attract electrons from the transition metal on the surface of the MXene, and the transition metal becomes a relatively electron-deficient electrophile.

[0097] Therefore, this mechanism proceeds as an SN2 reaction (Bimolecular Nucleophilic Substitution), which is a reaction between a nucleophile and an electrophile. The electron pair of the oxygen atom of ethoxide, a type of alkoxide group that is an electron-rich chemical species, acts as a nucleophile and attacks the Ti element, an electrophile present on the surface of MXene (Figure 6A). At the same time, the hydroxyl group bonded to the surface of the Ti element is removed along with the electron pair. The sodium ion added together with the ethoxide combines with the removed hydroxyl group to produce sodium hydroxide (NaOH) as a byproduct (Figure 6B). If the reaction in which ethoxide attacks other Ti elements of MXene in addition to the Ti element is repeated several times (Figure 6C), ethoxide is bonded as a ligand on the surface of MXene, and the surface of MXene is surface-modified with ethoxide.

[0098] As a result of the above Sn2 reaction, the electron pair of the oxygen atom of ethoxide forms a strong covalent bond with the Ti element, forming a Ti-OC bond.

[0099] In the SN2 reaction, the concentration of the substrate and the concentration of the nucleophile affect the reaction rate. Therefore, the rate equation of the above mechanism can be expressed as Rate = k[sub][nuc], where k is the reaction rate constant. The substrate can be considered to mean an electrophile.

[0100] For the SN2 reaction, polar aprotic solvents or nonpolar solvents such as acetone, DMF (dimethylformamide), DMSO (dimethyl sulfoxide), toluene, and hexane are mainly used. Since polar protic solvents can donate protons to the solution in which the reaction occurs, the protons of the solvent react with the nucleophile, inhibiting the SN2 reaction.

[0101] In addition, since the Sn2 reaction involves the simultaneous one-step addition of a nucleophile and the removal of a leaving group, the steric effect is an important factor. The steric hindrance of the substrate increases the energy of the transition state, increasing △G‡ and reducing the reaction rate. The more reactive the nucleophile, the more unstable it is and exists in a high energy level, which reduces △G‡ and thus increases the reaction rate. Therefore, a negatively charged nucleophile is more reactive than a neutral nucleophile, and the alkoxide disclosed in the present invention is a highly reactive nucleophile because it has a negative charge. In addition, the less steric hindrance of the alkoxide, the better the reaction occurs, so the smaller the carbon number of the alkoxide group, the less steric hindrance there is, and the easier the reaction tends to be. Therefore, in the examples of this reaction, ethoxide having 2 carbon atoms was used as the alkoxide.

[0102] In addition, since the rate of the Sn2 reaction is proportional to the concentration of the substrate and the concentration of the nucleophile, this reaction can proceed in various ways depending on the concentration of the substrate and the concentration of the nucleophile.

[0103]

[0104] FIG. 7 is a photograph showing the electrical conductivity of a MXene surface-modified with a metal alkoxide according to an embodiment of the present invention, and FIG. 8 is a graph showing the electrical conductivity of a MXene surface-modified with NaOEt (sodium ethoxide) according to an embodiment of the present invention, when the MXene is dispersed in a toluene solvent, depending on the amount of NaOEt.

[0105] The metal alkoxide-modified MXene according to the present invention can have an electrical conductivity of up to several thousand S / cm. Referring to FIG. 7, the electrical conductivity of the metal alkoxide-modified MXene was measured to be 2,000 to 3,000 S / cm, but can be higher depending on the amount of metal alkoxide. In the example of FIG. 8, NaOEt was used as the metal alkoxide, and toluene was used as a solvent to disperse the NaOEt-surface-modified MXene.

[0106] Since NaOEt is a compound with low electrical conductivity, the electrical conductivity of the NaOEt-modified MXene increases as the amount of NaOEt used for surface modification of the MXene decreases. On the other hand, the non-polar solvent-based dispersibility of the NaOEt-modified MXene increases as the amount of NaOEt used for surface modification of the MXene increases. Therefore, the dispersibility and electrical conductivity of the MXene surface-modified with the metal alkoxide vary depending on the amount of the added metal alkoxide. In the present invention, when the concentration of NaOEt was 50 μL, the electrical conductivity of the MXene surface-modified with NaOEt was found to be 3,000 S / cm. In addition, as shown in FIGS. 1 and 3, the MXene surface-modified with NaOEt was found to be well dispersed in the non-polar toluene solvent.

[0107] The range of MXene organic inks reported in prior research and technology is diverse, but in order for MXene organic inks to be applied to a wider range of industries, MXene dispersion in nonpolar organic solvents is necessary. However, it is known that the electrical conductivity of MXene inks dispersed in nonpolar organic solvents is quite low, at the level of tens to hundreds of S / cm. The MXene organic ink disclosed in the present invention has a high electrical conductivity of several thousand S / cm even in nonpolar organic solvents such as toluene and dichlorobenzene, and the above value is an electrical conductivity that is up to several tens of times higher than that of MXene inks reported in prior research and technology to date.

[0108]

[0109] The metal alkoxide-surface-modified MXene according to the present invention can be produced as MXene ink dispersed in a polar or non-polar organic solvent and used in conductive ink-based industries such as the printing industry and the battery industry.

[0110] Meanwhile, the metal alkoxide-surface-modified MXene according to the present invention can be produced in the form of a conductive film and a polymer composite, and the conductive film and the polymer composite can be used to produce an electromagnetic shielding material.

[0111] The MXene organic ink proposed in the present invention has high electrical conductivity comparable to that of metal. Since electromagnetic shielding efficiency improves as electrical conductivity increases, an electromagnetic shielding material manufactured using the MXene organic ink having high electrical conductivity comparable to that of metal exhibits excellent electromagnetic shielding performance. In addition, the MXene organic ink proposed in the present invention has excellent electrical conductivity, is lightweight, and has excellent processability using an aqueous solution. Therefore, the MXene organic ink proposed in the present invention can be applied not only to electromagnetic shielding and electrode pattern materials requiring electrical conductivity, but also to a wide range of applications, such as secondary batteries, accumulators, gas sensors, and biosensors.

[0112]

[0113] Hereinafter, an embodiment of a metal alkoxide-surface-modified MXene and a method for producing the same according to the present invention will be described.

[0114] [Example]

[0115] 1. Preparation of a MAXINE solution dispersed in DMSO solvent

[0116] Disperse MXene in a DMSO (Dimethyl Sulfoxide) solution. The concentration of the solution is 1 mg / ml.

[0117] 2. Add sodium ethoxide to toluene and stir.

[0118] Sodium ethoxide was added to toluene and stirred. 300 μL of sodium ethoxide was used.

[0119] 3. Reaction of ethoxide and macine

[0120] After mixing the two solutions generated in steps 1 and 2 above, stirring at room temperature below 60℃ for about 10 minutes causes the ethoxide to covalently bond to the surface of MXene through the Sn2 reaction between ethoxide and MXene. Thereafter, the MXene modified with ethoxide is transferred to ethyl alcohol, which is the solvent to be finally dispersed. The MXene contained in the ethyl alcohol solvent is separated into the solvent and MXene in a centrifuge. At this time, the solvents used in steps 1 and 2, DMSO (Dimethyl Sulfoxide) and toluene, can be replaced with ethyl alcohol through the centrifugation process.

[0121] 4. Obtaining MXene surface-modified with ethoxide

[0122] Through steps 1, 2, and 3, a MXene modified with ethoxide is finally obtained. At this time, the concentration of the MXene organic ink can be 0.01 to 100 mg / mL, and a concentration in this range is typically used.

[0123]

[0124] The foregoing description is merely exemplary, and various modifications may be made by those skilled in the art to which the present invention pertains without departing from the scope and technical spirit of the described embodiments. The above-described embodiments may be implemented individually or in any combination.

[0125] The present invention can be used in industrial fields related to maxine or maxine applications.

Claims

1. A compound formed by surface-modifying a MXene represented by the chemical formula 1 below with a metal alkoxide, An alkoxide is covalently bonded to the surface of the above-mentioned maxine and exists as a ligand. MXene surface-modified with metal alkoxide. [Chemical Formula 1] Here, M is a transition metal element selected from the group consisting of Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, Hf, and Ta, X is at least one of carbon and nitrogen, and n is an integer from 1 to 4.

2. In paragraph 1, The metal of the above metal alkoxide comprises an alkali metal, MXene surface-modified with metal alkoxide.

3. In paragraph 1, The alkyl or aryl group of the above alkoxide is in the form of a carbon chain or a carbon ring. MXene surface-modified with metal alkoxide.

4. In paragraph 3, The above alkoxide further contains an element selected from the group consisting of halogen elements (F, Cl, Br, I), nitrogen (N), sulfur (S), and silicon (Si). MXene surface-modified with metal alkoxide.

5. In a method for manufacturing a MXene surface-modified with a metal alkoxide, A step of preparing a MXene solution dispersed in a first solvent; A step of adding a metal alkoxide to a second solvent and stirring; and A step of modifying the surface of the MXene with a metal alkoxide by mixing the solution produced in the above preparation step and the above stirring step and stirring for a preset time or longer; comprising; A method for producing a MXene surface-modified with a metal alkoxide.

6. In paragraph 5, The first solvent and the second solvent include at least one selected from the group consisting of DMSO (Dimethyl Sulfoxide), DMF (dimethylformamide), NMP (N-Methyl-2-pyrrolidone), PC (propylene carbonate), toluene, and hexane. A method for producing a MXene surface-modified with a metal alkoxide.

7. In paragraph 5, After the above modifying step, a step of dispersing the MXene surface-modified with the metal alkoxide in an organic solvent selected from the group consisting of ethyl alcohol, isopropyl alcohol, acetonitrile, acetone, ethyl acetoacetate, diethyl ether, chloroform, toluene, and dichlorobenzene to obtain a MXene organic ink is further performed. A method for producing a MXene surface-modified with a metal alkoxide.

8. In paragraph 5, The range of concentration of the Maxine solution in the above preparation step is 0.01 to 100 mg / ml. A method for producing a MXene surface-modified with a metal alkoxide.

9. In paragraph 5, The amount of the above Maxine When mg, the amount of metal alkoxide used in the stirring step is ㎕ or less ㎕in, A method for producing a MXene surface-modified with a metal alkoxide.

10. In paragraph 5, The stirring time in the above stirring step ranges from 1 to 300 minutes, and the stirring temperature is 60°C or lower. A method for producing a MXene surface-modified with a metal alkoxide.

11. Maxine surface-modified with a metal alkoxide as described in any one of claims 1 to 4; and An organic solvent in which the above MAXINE is dispersed; The above organic solvent is selected from the group consisting of ethyl alcohol, isopropyl alcohol, acetonitrile, acetone, ethyl acetoacetate, diethyl ether, chloroform, toluene, and dichlorobenzene. Maxine organic ink.

12. In paragraph 11, The concentration of the above Maxine organic ink is 0.01 to 100 mg / mL. Maxine organic ink.

13. A step of dispersing a MXene surface-modified with a metal alkoxide manufactured by the method described in any one of clauses 5 to 10 in an organic solvent, The above organic solvent is selected from the group consisting of ethyl alcohol, isopropyl alcohol, acetonitrile, acetone, ethyl acetoacetate, diethyl ether, chloroform, toluene, and dichlorobenzene. Method for producing Maxine organic ink.

14. A liquid process-manufactured product including the Maxine organic ink described in Article 11. Electrically conductive film.

15. Comprising the Maxine organic ink described in Article 11, Electrically conductive polymer composite.

16. A conductive film manufactured using the electrically conductive film described in Article 14 or the electrically conductive polymer composite described in Article 15. Electromagnetic shielding material.

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