Method for preparing two-dimensional transition metal nanoparticle-polymer composite insulation composition containing transition metal nanoparticles prepared from oxidized mxene, and two-dimensional transition metal nanoparticle-polymer composite insulation composition prepared thereby

Abstract

The present invention provides a method for preparing a two-dimensional transition metal nanoparticle-polymer composite insulation composition, and a composite insulation composition prepared thereby, the method comprising the steps of: preparing a two-dimensionally-structured MXene powder having an oxidized surface; heat-treating the oxidized MXene powder at 300-900°C, thereby preparing two-dimensional transition metal nanoparticles with a plate-like structure; and mixing the two-dimensional transition metal nanoparticles with a polymer resin, thereby preparing a two-dimensional transition metal nanoparticle-polymer insulation composition, wherein the heat treatment enhances the crystallinity of the two-dimensional transition metal nanoparticles, thereby improving the insulation properties of the two-dimensional transition metal nanoparticle-polymer insulation composition. The method for preparing a two-dimensional transition metal nanoparticle-polymer composite insulation composition, of the present invention, comprises preparing highly crystalline two-dimensional transition metal nanoparticles from surface-oxidized MXene by using the spontaneous oxidation of MXene, so as to mix same with a polymer resin, thereby providing a two-dimensional transition metal nanoparticle-polymer composite insulation composition having excellent insulation properties, and the two-dimensional transition metal nanoparticle-polymer composite insulation composition prepared thereby includes transition metal nanoparticles, which are prepared from oxidized two-dimensionally-structured MXene so as to have a two-dimensional plate structure and has enhanced crystallinity through heat treatment, and thus has excellent direct current dielectric breakdown strength and volume resistivity.

Description

Method for producing a two-dimensional transition metal nanoparticle-polymer composite insulating composition comprising transition metal nanoparticles prepared from oxidized mexene, and a two-dimensional transition metal nanoparticle-polymer composite insulating composition prepared thereby

[0001] The present invention relates to a method for producing a two-dimensional transition metal nanoparticle-polymer composite insulating composition comprising transition metal nanoparticles produced from oxidized mexene, and a two-dimensional transition metal nanoparticle-polymer composite insulating composition produced thereby.

[0002] MXene is a type of two-dimensional transition metal carbide, nitride, and carbonitride. Its unique structural properties, combined with its exceptionally high, metal-like electrical conductivity in the plane, have led to its widespread use in a variety of applications.

[0003] However, Mexene is prone to oxidation when exposed to air or moisture, which causes problems such as reduced electrical conductivity and mechanical strength. In particular, Mexene, which is mainly manufactured in aqueous solution, is easily oxidized and requires special storage and management. Therefore, efforts exist to stabilize Mexene against oxidation, as reported in Korean Patent No. 10-2092611, or to control the storage environment, as reported in Korean Patent No. 10-2092611.

[0004] Meanwhile, research is also underway to understand and utilize the oxidation of MXene. For example, this includes studies to enhance oxygen reduction reaction catalytic activity by controlling oxidation of the MXene surface using hydrogen peroxide (ACS Catalyst, 2020, 10, 13487), and to utilize oxidized MXene as a charge transport layer in perovskite photovoltaic devices (Korean Patent Publication No. 10-2023-0030747).

[0005] Meanwhile, ceramic nanoparticles are known to be effective in improving the insulating properties of polymer insulating materials, and are expected to contribute to reducing the insulation layer thickness of power cables to which polymer nanocomposites containing them are applied. In particular, among various metal oxide nanoparticles such as silica (SiO2), alumina (Al2O3), and zirconia (ZrO2), titania (TiO2) nanoparticles have been reported to be effective in not only improving the dielectric strength of polymer materials but also enhancing their degradation stability.

[0006] In addition, it has been reported that when the shape of these ceramic nanomaterials is a two-dimensional plate-like structure rather than an isotropic structure, they can act as a barrier to suppress insulation breakdown due to their unique high aspect ratio and large surface area, and can improve insulation strength (ACS Appl. Nano Mater. 2018, 1, 3520).

[0007] Accordingly, the inventors of the present invention have developed a two-dimensional transition metal nanoparticle-polymer composite insulating composition comprising transition metal nanoparticles manufactured from oxidized mexene, which utilizes the fact that mexene having a unique two-dimensional structure is easily oxidized, and by more precisely oxidizing the surface-oxidized mexene, crystalline two-dimensional particles of titania are manufactured, and by mixing this with a polymer resin, the insulating strength and volume resistivity are greatly increased, thereby completing the present invention.

[0008] The present invention provides a method for manufacturing a two-dimensional transition metal nanoparticle-polymer composite insulating composition as a technical solution.

[0009] In addition, the present invention has as a technical solution the task of providing a two-dimensional transition metal nanoparticle-polymer composite insulating composition.

[0010] In order to achieve the above technical task, the present invention,

[0011] A step for preparing a two-dimensional structured Mexine powder having an oxidized surface;

[0012] A step of manufacturing a two-dimensional transition metal nanoparticle having a plate-like structure by heat-treating the above-mentioned oxidized mexine powder at 300 to 900°C; and

[0013] A step of preparing a two-dimensional transition metal nanoparticle-polymer insulating composition by mixing the two-dimensional transition metal nanoparticle with a polymer resin;

[0014] The above Mexine is M n+1 X n (n=integer between 1 and 4) has an empirical formula,

[0015] The above M is one transition metal selected from the group consisting of group IIIB, group IVB, group VB and group VIB metals,

[0016] wherein X is C, N or a combination thereof,

[0017] Characterized in that the crystallinity of the two-dimensional transition metal nanoparticles is strengthened through the above heat treatment, thereby improving the insulating properties of the two-dimensional transition metal nanoparticle-polymer insulating composition.

[0018] A method for manufacturing a two-dimensional transition metal nanoparticle-polymer composite insulating composition is provided.

[0019] In the present invention, the M is characterized in that it is one selected from the group consisting of Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Lu.

[0020] In the present invention, the polymer resin is characterized in that it is at least one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyacrylonitrile resin, acrylonitrile-butadiene-styrene (ABS), styrene-acrylonitrile (SAN), acrylic resin, methacrylic resin, polyamide, polyester, polycarbonate, polyphenylene sulfide, polyamideimide, polyvinyl butyral, polyvinyl formal, polyhydroxypolyether, polyether, polyphthalamide, phenoxy resin, polyurethane, nitrile butadiene resin, urea resin (UF), melamine resin (MF), unsaturated polyester resin (UP), epoxy resin, and silicone resin.

[0021] In the present invention, the polymer resin and the two-dimensional transition metal nanoparticles are characterized in that they are mixed in a ratio of 99.9999 to 99.9:0.0001 to 0.1 wt%.

[0022] In addition, in order to achieve the above other technical tasks, the present invention provides a two-dimensional transition metal nanoparticle-polymer composite insulating composition characterized by being manufactured according to the above manufacturing method.

[0023] The method for producing a two-dimensional transition metal nanoparticle-polymer composite insulating composition of the present invention utilizes the spontaneous oxidation problem of MXene to make surface-oxidized MXene into two-dimensional transition metal nanoparticles with high crystallinity, and mixes this with a polymer resin to provide a two-dimensional transition metal nanoparticle-polymer composite insulating composition with excellent insulating properties.

[0024] The two-dimensional transition metal nanoparticle-polymer composite insulating composition of the present invention has a two-dimensional plate-like structure manufactured from oxidized mexene, which is a two-dimensional structure, and contains transition metal nanoparticles whose crystallinity is enhanced through heat treatment, thereby exhibiting excellent direct current insulation breakdown strength and volume resistivity.

[0025] Figure 1 is a flow chart of a method for manufacturing a two-dimensional transition metal nanoparticle-polymer composite insulating composition according to the present invention.

[0026] Figure 2 is a schematic diagram showing the insulation principle of a two-dimensional transition metal nanoparticle-polymer composite insulating composition according to the present invention.

[0027] FIG. 3 is an X-ray diffraction graph of two-dimensional titania nanoparticles according to one embodiment of the present invention.

[0028] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. Throughout the description of each drawing, similar reference numerals have been used to designate similar components.

[0029] The terminology used herein is merely for the purpose of describing specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In the present invention, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, reaction, component, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, reactions, components, or combinations thereof.

[0030] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0031]

[0032] According to one aspect of the present invention, there is provided a method of preparing a two-dimensional structured Mexine powder having an oxidized surface; a step of heat-treating the oxidized Mexine powder at 300 to 900° C. to prepare a two-dimensional transition metal nanoparticle having a plate-like structure; and a step of mixing the two-dimensional transition metal nanoparticle with a polymer resin to prepare a two-dimensional transition metal nanoparticle-polymer insulating composition; wherein the Mexine is M n+1 X n (n=an integer between 1 and 4), wherein M is one transition metal selected from the group consisting of Group IIIB, Group IVB, Group VB, and Group VIB metals, and X is C, N, or a combination thereof, and a method for producing a two-dimensional transition metal nanoparticle-polymer composite insulating composition is provided, characterized in that the crystallinity of the two-dimensional transition metal nanoparticle is strengthened through the heat treatment, thereby improving the insulating properties of the two-dimensional transition metal nanoparticle-polymer composite insulating composition.

[0033] Figure 1 is a flow chart of a method for manufacturing a two-dimensional transition metal nanoparticle-polymer composite insulating composition according to the present invention. The following description will be given with reference to Figure 1.

[0034] First, prepare oxidized Mexine powder. Alternatively, you can prepare Mexine with an oxidized surface by oxidizing a Mexine solution.

[0035] MXene is a two-dimensional plate-like, planar structured material, which is an atomic-thick layer of carbon or nitrogen bonded to a transition metal. It is sometimes described by the term "MX-ene" or "MX-ene composition." That is, MX-ene is a two-dimensional transition metal carbide, nitride, or carbonitride comprising at least one layer having first and second surfaces, and in the present invention, which will be described below, MX-ene is M n+1 X n (n=an integer between 1 and 4), wherein M is a transition metal selected from the group consisting of group IIIB, group IVB, group VB, and group VIB metals, and X may be C, N, or a combination thereof.

[0036] In the present invention, the M is characterized in that it is one selected from the group consisting of Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Lu, and more preferably may include Ti.

[0037] The above-mentioned mexene is susceptible to oxidation when exposed to air or moisture, which can lead to problems such as reduced electrical conductivity and mechanical strength. In particular, mexene, which is primarily manufactured in aqueous solution, is prone to oxidation and requires special storage and management. Oxidized mexene exhibits reduced conductivity, so precise environmental control and additional processes are employed to suppress oxidation. However, oxidation will eventually occur.

[0038] The present invention controls the oxidation of mexene thus generated and utilizes the two-dimensional structural characteristics of mexene. In order to utilize oxidized mexene, it is necessary to control the structure of mexene depending on the intended application. The present invention is characterized by controlling the heat treatment conditions of oxidized mexene to utilize it as a composite material for an insulating composition.

[0039] Next, the above oxidized mexine powder is heat-treated to produce two-dimensional transition metal nanoparticles with a plate-like structure.

[0040] Heat treatment is performed to enhance the crystallinity of the above two-dimensional transition metal nanoparticles and improve the insulating properties of the two-dimensional transition metal nanoparticle-polymer insulating composition containing the same. The heat treatment stabilizes the crystal structure of the two-dimensional transition metal nanoparticles prepared from the oxidized MXene.

[0041] For example, when using a Ti-containing mexene, the resulting two-dimensional titania nanoparticles appear as a mixture of anatase and rutile crystals. The rutile crystal structure is thermodynamically more stable than the anatase crystal structure, and heat treatment can convert the anatase crystals into rutile crystals, further improving their insulating properties.

[0042] The above heat treatment can be performed at 300 to 900°C for 120 to 360 minutes. In addition, it is preferable to perform the heat treatment in a gaseous atmosphere containing oxygen to form oxidation conditions.

[0043] If the heat treatment temperature is less than 300°C, the titania generated from the surface of the oxidized mexene will not crystallize properly, which is undesirable. If it exceeds 900°C, the titania crystals may be converted into other crystal phases, which is undesirable. More preferably, it may be 300 to 600°C.

[0044] If the heat treatment time is less than 120 minutes or more than 360 minutes, the time required for crystallization of titania is insufficient or excessive, which is not desirable. More preferably, it may be 200 to 300 minutes.

[0045] Through the above heat treatment, oxidation of Ti existing in the surface layer of Mexene occurs, and the surface composed of Ti-O groups is heat-treated according to the oxidation of Ti, and is precisely crystallized into a crystalline titania phase. The transition metal nanoparticles thus manufactured are manufactured from Mexene, which has a two-dimensional structure, and have a two-dimensional plate-like structure and are characterized by enhanced crystallinity.

[0046] In addition, since the transition metal nanoparticles are manufactured from nano-sized mexine, they are also formed into a nano-sized plate-like structure, and preferably, nanoparticles having a thickness of less than 50 nm can be manufactured.

[0047] FIG. 2 is a schematic diagram showing the insulation principle of a two-dimensional transition metal nanoparticle-polymer composite insulating composition according to the present invention. Referring to FIG. 2, it can be confirmed that the two-dimensional nanoparticles can increase the insulation breakdown strength by making the path through which electrons injected under high voltage pass through the polymer substrate complicated.

[0048] Finally, the two-dimensional transition metal nanoparticles are melt-mixed with a polymer resin to produce a two-dimensional transition metal nanoparticle-polymer insulating composition.

[0049] In the present invention, the polymer resin is characterized in that it is at least one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyacrylonitrile resin, acrylonitrile-butadiene-styrene (ABS), styrene-acrylonitrile (SAN), acrylic resin, methacrylic resin, polyamide, polyester, polycarbonate, polyphenylene sulfide, polyamideimide, polyvinyl butyral, polyvinyl formal, polyhydroxypolyether, polyether, polyphthalamide, phenoxy resin, polyurethane, nitrile butadiene resin, urea resin (UF), melamine resin (MF), unsaturated polyester resin (UP), epoxy resin, and silicone resin.

[0050] Preferably, it may be at least one selected from the group consisting of polyethylene, polypropylene, polystyrene and polyvinyl chloride, and more preferably, polypropylene.

[0051] The polymer resin and the two-dimensional transition metal nanoparticles are preferably melt-mixed. Preferably, the mixing can be performed using a melt mixer at 160 to 250°C for 10 to 60 minutes, and more preferably, the mixing can be performed at 200°C for 20 minutes.

[0052] In the present invention, the polymer resin and the two-dimensional transition metal nanoparticles are characterized in that they are mixed in a ratio of 99.9999 to 99.9:0.0001 to 0.1 wt%.

[0053] Since transition metal nanoparticles having a two-dimensional structure are used and manufactured from oxidized mexine, and crystallinity is strengthened through heat treatment, the dielectric breakdown strength and volume resistivity of the insulating composition can be effectively increased even by adding only a small amount of transition metal nanoparticles.

[0054] Thus, the method for manufacturing a two-dimensional transition metal nanoparticle-polymer composite insulating composition of the present invention is characterized by utilizing the spontaneous oxidation problem of MXene to make surface-oxidized MXene into two-dimensional transition metal nanoparticles with high crystallinity, and mixing this with a polymer resin to manufacture a two-dimensional transition metal nanoparticle-polymer composite insulating composition with excellent insulating properties.

[0055]

[0056] According to another aspect of the present invention, a two-dimensional transition metal nanoparticle-polymer composite insulating composition is provided, characterized in that it is manufactured according to the manufacturing method of the present invention.

[0057] The composite insulating composition of the present invention is manufactured from oxidized mexene, which is a two-dimensional structure, and has a two-dimensional plate-like structure. It has the technical characteristics of excellent direct current insulation breakdown strength and volume resistivity by including transition metal nanoparticles whose crystallinity is strengthened through heat treatment.

[0058] Accordingly, the two-dimensional transition metal nanoparticle-polymer composite insulating composition can be used to manufacture various insulating layers such as a high-voltage insulator as well as a covering layer or sheath of a cable conductor.

[0059]

[0060] Hereinafter, embodiments of the present invention will be described in more detail. However, the following embodiments are provided merely to aid understanding of the present invention, and the scope of the present invention is not limited thereby.

[0061]

[0062] <Example>

[0063] <Example 1-1>: Preparation of two-dimensional titania nanoparticles at 300 degrees

[0064] Ti3C2T with an unevenly oxidized surface after being stored in an aqueous solution for more than 30 days x After sonication for 30 minutes of a slurry containing Mexine, it was centrifuged at 8000 rpm for 10 minutes. The supernatant containing Mexine was filtered to produce a film, which was then ground in a mortar to produce surface-oxidized Mexine powder.

[0065] The surface-oxidized Mexine powder was placed in an alumina crucible and placed in an electric furnace, then heated at 300 degrees (℃) for 240 minutes to produce white two-dimensional titania nanoparticles.

[0066]

[0067] <Example 1-2>: Preparation of polypropylene nanocomposite containing two-dimensional titania nanoparticles manufactured at 300 degrees

[0068] A two-dimensional titania nanoparticle-polypropylene mixture was prepared by putting 99.9999 to 99.9 wt% of polypropylene and 0.0001 to 0.1 wt% of two-dimensional titania nanoparticles heat-treated at 300 degrees into a melt mixer and melt-mixing at a temperature of 200 degrees for 20 minutes, and then putting this into a hot pressing molding machine preheated to 200 degrees, press-molding under a pressure of 10 MPa for 10 minutes, and then rapidly cooling to prepare a sheet-shaped sample.

[0069]

[0070] <Example 2-1>: Two-dimensional titania nanoparticles manufactured at 600 degrees

[0071] It was manufactured in the same manner as Example 1-1, except that the heating temperature in the electric furnace was 600 degrees.

[0072]

[0073] <Example 2-2>: Polypropylene nanocomposite containing two-dimensional titania nanoparticles manufactured at 600 degrees

[0074] A two-dimensional titania nanoparticle-polypropylene mixture was prepared by putting 99.9999 to 99.9 wt% of polypropylene and 0.0001 to 0.1 wt% of two-dimensional titania nanoparticles heat-treated at 600 degrees into a melt mixer and melt-mixing at a temperature of 200 degrees for 20 minutes, and then putting this into a hot pressing molding machine preheated to 200 degrees, press-molding under a pressure of 10 MPa for 10 minutes, and then rapidly cooling to prepare a sheet-shaped sample.

[0075]

[0076] <Comparative Example 1>: Polypropylene nanocomposite containing naturally oxidized mexine

[0077] A naturally oxidized Mexene-polypropylene mixture was prepared by putting 99.999 to 99.9 wt% of polypropylene and 0.001 to 0.1 wt% of Mexene naturally oxidized in the air into a melt mixer and melt-mixing at a temperature of 200 degrees for 20 minutes, and then putting this into a hot pressing molding machine preheated to 200 degrees, pressurizing under a pressure of 10 MPa for 10 minutes, and then rapidly cooling to prepare a sheet-shaped sample.

[0078]

[0079] <Comparative Example 2>: Pure polypropylene

[0080] 100 wt% of pure polypropylene was hot-pressed and molded, and then placed in a hot-pressing molding machine preheated to 200 degrees, press-molded under a pressure of 10 MPa for 10 minutes, and then rapidly cooled to produce a sheet-shaped sample.

[0081]

[0082] <Example of an exam>

[0083] Crystallographic analysis: X-ray diffraction graph

[0084] Figure 3 is an X-ray diffraction graph of surface-oxidized MXene, two-dimensional titania nanoparticles made at 300 degrees, and two-dimensional titania nanoparticles made at 600 degrees. Referring to Figure 3, the surface-oxidized MXene is Ti3C2T x In addition to the unique (002) peak of Mexine, it was confirmed that anatase and rutile peaks of low crystallinity were mixed together.

[0085] When heat-treated at 300°C, it was confirmed that the anatase crystal peak increased and the crystallinity improved, and when heat-treated at 600°C, the anatase crystal peak disappeared and the rutile crystal peak increased more strongly, it was confirmed that the crystallinity improved.

[0086]

[0087] DC insulation breakdown strength analysis

[0088] After contacting spherical electrodes at both ends of a sample impregnated with silicone insulating oil, a DC voltage was applied while increasing the voltage at a rate of 1.5 kV / sec. The voltage at the point of breakdown was measured, and the breakdown strength was calculated by dividing the voltage by the thickness of the specimen. The shape parameter values ​​of the Weibull distribution for this are shown in Table 1 below.

[0089]

[0090] Volume resistance analysis

[0091] A voltage of 5 kV was applied across the sample in the thickness direction for 10 minutes, and then the leakage current (I) was measured. From this, the volume resistivity (R) was calculated considering the film thickness (t) and electrode area (A), and is shown in Table 1 below.

[0092]

[0093] ClassificationExample 1-2Example 2-2Comparative Example 1Comparative Example 2Nanoparticle content (weight%)0.00010.0010.010.10.00010.0010.010.10.0010.10DC insulation breakdown strength (kV / mm)392.9459.8406.3277.8397.9398.2371.6316.3267.6247.1387.4Volume resistivity (Ω cm)3.4E178.3E171.1E159.9E142.6E177.7E166.3E161.3E167.4E149.1E141.48E17

[0094] As shown in Table 1, it can be confirmed that the DC breakdown strength of the sample according to Example 1-2 increases to 459.8 kV / mm when the content of the anatase-type two-dimensional titania nanoparticles made from the surface-oxidized MXene is 0.001 wt%, and then rapidly decreases as the content of the nanoparticles increases thereafter. In addition, it can be confirmed that the DC breakdown strength of the sample according to Example 2-2 increases to 398.2 kV / mm when the content of the rutile-type two-dimensional titania nanoparticles made from the surface-oxidized MXene is 0.001 wt%, and then rapidly decreases as the content of the nanoparticles increases thereafter.

[0095] On the other hand, it can be confirmed that the DC breakdown strength of the sample according to Comparative Example 1 is reduced to 267.6 and 247.1 kV / mm when naturally oxidized Mexine is mixed.

[0096] In addition, considering that the DC breakdown strength of pure polypropylene according to Comparative Example 2 is 387.4 kV / mm, it is believed that the anatase type two-dimensional titania nanoparticles are more effective in improving the DC breakdown strength than the rutile type two-dimensional titania nanoparticles.

[0097] In addition, it was confirmed that the volume resistivity of the sample according to Example 1-2 was also significantly improved to 8.3E17 Ω·cm when the content of the two-dimensional titania nanoparticles of the anatase type was 0.001 wt%, compared to the polypropylene nanocomposite including the naturally oxidized MXene of Comparative Examples 1 and 2 and pure polypropylene.

[0098] Thus, it can be confirmed that the two-dimensional transition metal nanoparticle-polymer composite insulating composition manufactured according to the manufacturing method of the present invention has the technical characteristics of excellent direct current insulation breakdown strength and volume resistivity by including transition metal nanoparticles having a two-dimensional plate-like structure manufactured from oxidized mexene, which is a two-dimensional structure, and having enhanced crystallinity through heat treatment.

[0099]

[0100] The above description is merely an illustrative description of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of ​​the present invention, but rather to illustrate it, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

Claims

1. A step of preparing a two-dimensional structured Mexine powder with an oxidized surface; A step of manufacturing a two-dimensional transition metal nanoparticle having a plate-like structure by heat-treating the above-mentioned oxidized mexine powder at 300 to 900°C; and A step of preparing a two-dimensional transition metal nanoparticle-polymer insulating composition by mixing the two-dimensional transition metal nanoparticle with a polymer resin; The above Mexine is M n+1 X n (n=integer between 1 and 4) has an empirical formula, The above M is one transition metal selected from the group consisting of group IIIB, group IVB, group VB and group VIB metals, wherein X is C, N or a combination thereof, Characterized in that the crystallinity of the two-dimensional transition metal nanoparticles is strengthened through the above heat treatment, thereby improving the insulating properties of the two-dimensional transition metal nanoparticle-polymer insulating composition. Method for producing a two-dimensional transition metal nanoparticle-polymer composite insulating composition.

2. In paragraph 1, The above M is, Characterized in that it is one selected from the group consisting of Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Lu. Method for producing a two-dimensional transition metal nanoparticle-polymer composite insulating composition.

3. In paragraph 1, The above polymer resin is, Characterized in that it is at least one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyacrylonitrile resin, acrylonitrile-butadiene-styrene (ABS), styrene-acrylonitrile (SAN), acrylic resin, methacrylic resin, polyamide, polyester, polycarbonate, polyphenylene sulfide, polyamideimide, polyvinyl butyral, polyvinyl formal, polyhydroxypolyether, polyether, polyphthalamide, phenoxy resin, polyurethane, nitrile butadiene resin, urea resin (UF), melamine resin (MF), unsaturated polyester resin (UP), epoxy resin, and silicone resin. Method for producing a two-dimensional transition metal nanoparticle-polymer composite insulating composition.

4. In paragraph 1, The polymer resin and the two-dimensional transition metal nanoparticles are characterized in that they are mixed in a ratio of 99.9999 to 99.9:0.0001 to 0.1 wt%. Method for producing a two-dimensional transition metal nanoparticle-polymer composite insulating composition.

5. A two-dimensional transition metal nanoparticle-polymer composite insulating composition characterized by being manufactured according to any one of claims 1 to 4.

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