Carbon-based alloy grounding material

Abstract

The invention discloses a carbon-based alloy grounding material, and relates to the technical field of grounding materials. According to the invention, rare earth doped boron nitride and poly (3-hexylthiophene) are utilized to form a three-dimensional interpenetrating conductive network in a polymer matrix, so that high conductivity and corrosion resistance are realized; in the preparation process of the conductive compound, an ultrasonic-assisted microwave polymerization process is utilized to promote orientation arrangement and crystal nucleus formation of a poly (3-hexylthiophene) molecular chain, meanwhile, charge redistribution on the surface of boron nitride is induced, the adsorption capacity to a thiophene monomer is enhanced, and the conductivity of a matrix is greatly enhanced; according to the invention, poly (2, 5-bis (3-tetradecyl thiophene-2-yl) thieno [3, 2-b] thiophene), the conductive compound and polyimide are subjected to electron beam irradiation crosslinking treatment and participate in oxygen adsorption and release in the grounding material, in addition, the conductive compound and poly (2, 5-bis (3-tetradecyl thiophene-2-yl) thieno [3, 2-b] thiophene) have a synergistic effect, and the conductivity is further improved.

Description

Technical Field

[0001] This invention relates to the field of grounding materials technology, specifically carbon-based alloy grounding materials. Background Technology

[0002] Grounding is a protective measure taken to ensure the safety of electrical, communication, and microelectronic equipment, and to prevent short-circuit currents from endangering personnel and equipment. It plays a role in dissipating and equalizing currents from lightning, static electricity, and fault currents. Grounding systems are concealed works; therefore, conductors buried in the soil are connected to related facilities to divert additional harmful currents generated by electrical equipment or other related devices during operation into the earth for dissipation. Buildings, subways, petrochemical facilities, transmission line towers, substations, power plants, etc., all require grounding. Grounding grids are distributed underground. To achieve a good electrical connection between the zero potential point of various electrical equipment and the earth, the zero potential parts of various electrical equipment are connected to a metal grounding electrode. The good conductivity between the metal grounding electrode and the earth fulfills the system requirements for working grounding, protective grounding, and lightning protection. Due to differences in the structure of the soil crust, it is necessary to ensure a good electrical connection between the metal grounding electrode and various soils (especially soils with high resistivity). Its design requirements are comparable to the lifespan of surrounding facilities, generally ≥30 years.

[0003] Currently, the materials used in my country's grounding grids are mainly metals such as steel, copper, and zinc. Although these metals have certain electrical conductivity, their corrosion resistance is significantly limited. Long-term burial in soil makes them susceptible to corrosion, thus reducing their service life and performance. Soil has a complex structure, consisting of a multiphase system of gas, liquid, and solid phases. Because soil is a multiphase system with poor fluidity, significant differences in soluble salts, water content, oxygen content, and porosity in different parts of the soil lead to potential differences between different parts of the metal components, especially severe during the rainy season. To ensure the normal operation and safety of the grounding grid, regular excavation and inspection are usually required to assess its corrosion level and operating condition, causing considerable inconvenience and economic burden on power system maintenance. Therefore, the development of a grounding material with good conductivity and corrosion resistance is particularly necessary. Summary of the Invention

[0004] The purpose of this invention is to provide carbon-based alloy grounding materials to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a carbon-based alloy grounding material, comprising the following preparation steps:

[0006] (1) The activated rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylideneacetone)palladium, tetra-n-butylammonium bromide, cesium carbonate, glacial acetic acid and tetrahydrofuran were mixed and stirred at 500 rpm for 6 h. The mixture was then treated with ultrasonic-assisted microwave process under nitrogen atmosphere, and then precipitated with methanol. The solid was filtered and collected to obtain the conductive composite.

[0007] (2) Mix poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene) solution, conductive composite, and carbon material, stir at 300 rpm for 40 min, sonicate at 30 kHz for 1 h, and then add polyimide precursor solution.

[0008] Under a nitrogen atmosphere, electron beam irradiation crosslinking is performed, then additives are added, and the material is coated onto a wire core made of galvanized steel or other metals through an extrusion process. Finally, the material is thermally extended during microwave heating to obtain a carbon-based alloy grounding material.

[0009] Furthermore, the parameters of the ultrasonic-assisted microwave process in step (1) are: ultrasonic power of 600W, microwave power of 750W, and time of 40-80min.

[0010] Furthermore, the mass ratio of rare earth doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylideneacetone)palladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran in step (1) is 0.1:1:0.1:0.06:1.5:1.6:0.02:20.

[0011] Further, the preparation method of rare earth doped boron nitride in step (1) is as follows: Boric acid, melamine, and deionized water are mixed, rare earth nitrate is added, the temperature is raised to 120°C, stirred at 500 rpm for 2 hours, dried at 80°C for 10 hours, then heat-treated at 1000-1300°C for 2 hours under a nitrogen atmosphere, then washed three times with deionized water to remove unreacted substances, and then dried at 80°C for 10 hours; the mass ratio of boric acid, melamine, deionized water, and rare earth nitrate is 1:0.2:100:0.05.

[0012] Furthermore, the rare earth nitrate is composed of cerium nitrate hexahydrate, europium nitrate hexahydrate, neodymium nitrate hexahydrate, and yttrium nitrate hexahydrate, with a molar ratio of 1:1:1:1.

[0013] Furthermore, the process parameters for electron beam irradiation in step (2) are: irradiation energy of 1.5 MeV and dose of 50-100 kGy.

[0014] Furthermore, in step (2), the mass ratio of the poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene) solution, conductive composite, carbon material, polyimide precursor solution, and additive is 10:5:0.1:50 to 80:5.

[0015] Furthermore, the carbon material is at least one of graphene, carbon nanotubes, acetylene black, and conductive carbon black.

[0016] Furthermore, the temperature of the extrusion process in step (2) is 260–300°C.

[0017] Furthermore, the other metal mentioned in step (2) is at least one of pure copper, copper-clad steel, aluminum alloy, and copper-clad aluminum.

[0018] Furthermore, the power of microwave heating in step (2) is 500W.

[0019] Furthermore, the thermal elongation ratio in step (2) is 1.1 to 1.3 times.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] The present invention is prepared by blending grounding material poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene), conductive composite and polyimide, and then coating the conductor core wire to achieve high conductivity and corrosion resistance.

[0022] First, rare-earth-doped boron nitride and poly(3-hexylthiophene) form a three-dimensional interpenetrating conductive network in a polymer matrix through π-π conjugation and quantum tunneling effects, thereby achieving high conductivity and corrosion resistance. During the preparation of the conductive composite, 3-hexylthiophene monomers preferentially adsorb onto defect sites on the surface of boron nitride. Rare earth elements, as strong electron donors, inject electrons into the thiophene rings through charge transfer, increasing hole mobility and thus improving conductivity. Then, an ultrasonic-assisted microwave polymerization process is used to form poly(3-hexylthiophene). At the same time, microwaves induce a redistribution of charge on the surface of boron nitride, enhancing the adsorption capacity of thiophene monomers and strengthening the π-π stacking effect between thiophene rings, which is beneficial to enhancing conductivity.

[0023] Secondly, by cross-linking poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene), a conductive composite, and polyimide with electron beam irradiation, free radicals attack the thiophene ring of poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) and the imide ring of polyimide to form cross-linking bonds. At the same time, it participates in the adsorption and release of oxygen in the grounding material, thereby regulating the oxygen concentration on the metal surface and inhibiting the formation of oxygen concentration cells. Furthermore, by utilizing its thiophene ring conjugated system and the layered structure of boron nitride, the diffusion path of the corrosive medium is extended, thereby enhancing the corrosion resistance. The conductive composite, together with poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene), presents a conductive network in the matrix, further improving the conductivity of the matrix. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] To more clearly illustrate the method provided by the present invention, the following embodiments are provided in detail. The test methods for various indicators of the carbon-based alloy grounding material prepared in the following embodiments are as follows:

[0026] Conductivity: The resistivity of the same size examples and comparative examples was tested in accordance with GB / T21698.

[0027] Corrosion resistance: Examples and comparative examples of the same size were buried in alkaline soil for accelerated corrosion test. The soil temperature was 60°C, the water content was 20%, the total salt content was 18%, the pH was 9.5, and the time was 1000h. The resistivity was then tested.

[0028] Example 1

[0029] (1) Boric acid, melamine, and deionized water were mixed, rare earth nitrate was added, the temperature was raised to 120°C, stirred at 500 rpm for 2 hours, dried at 80°C for 10 hours, then heat-treated at 1000°C for 2 hours under a nitrogen atmosphere, and then washed three times with deionized water to remove unreacted substances, and then dried at 80°C for 10 hours to obtain rare earth-doped boron nitride; the mass ratio of boric acid, melamine, deionized water, and rare earth nitrate was 1:0.2:100:0.05; the rare earth nitrate was composed of cerium nitrate hexahydrate, europium nitrate hexahydrate, neodymium nitrate hexahydrate, and yttrium nitrate hexahydrate, with a molar ratio of 1:1:1:1; rare earth-doped boron nitride was mixed with 30 wt% nitric acid solution and reacted for 3 hours, and then washed six times with deionized water; The rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran were mixed and stirred at 500 rpm for 6 h. The mixture was then subjected to an ultrasonic-assisted microwave process under a nitrogen atmosphere with a flow rate of 50 sccm. The ultrasonic power was 600 W, the microwave power was 750 W, and the time was 40 min. The mixture was then precipitated with methanol, filtered, and the solid was collected to obtain a conductive composite. The mass ratio of the rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran was 0.1:1:0.1:0.06:1.5:1.6:0.02:20.

[0030] (2) A poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene) solution, a conductive composite, and graphene were mixed, stirred at 300 rpm for 40 min, and sonicated at 30 kHz for 1 h. A polyimide precursor solution was added, and electron beam irradiation crosslinking was performed under a nitrogen atmosphere with a flow rate of 50 sccm. The process parameters were: irradiation energy of 1.5 MeV and dose of 50 kGy. Then, additives were added, and the mixture was extruded at a temperature of 260 °C to coat a wire core made of galvanized steel. Finally, thermal stretching was performed during microwave heating at a power of 500 W, with a stretching factor of 1.1 times, to obtain a carbon-based alloy grounding material. The poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene The mass ratio of poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution, conductive composite, graphene, polyimide precursor solution, and additives is 10:5:0.1:50:5; the poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution is composed of PBTTT-C14 poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene), camphor sulfonic acid, and N-methylpyrrolidone, with a mass ratio of 10:0.3:10; the polyimide precursor solution is composed of polyamic acid and dimethylacetamide, with a mass ratio of 10:15; the additives are composed of aluminate coupling agent F-1, zeylan flavonoids, melamine, and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, with a mass ratio of 1:0.6:2:3.

[0031] Example 2

[0032] (1) Boric acid, melamine, and deionized water were mixed, rare earth nitrate was added, the temperature was raised to 120°C, stirred at 500 rpm for 2 hours, dried at 80°C for 10 hours, then heat-treated at 1200°C for 2 hours under a nitrogen atmosphere, and then washed three times with deionized water to remove unreacted substances, and then dried at 80°C for 10 hours to obtain rare earth-doped boron nitride; the mass ratio of boric acid, melamine, deionized water, and rare earth nitrate was 1:0.2:100:0.05; the rare earth nitrate was composed of cerium nitrate hexahydrate, europium nitrate hexahydrate, neodymium nitrate hexahydrate, and yttrium nitrate hexahydrate, with a molar ratio of 1:1:1:1; rare earth-doped boron nitride was mixed with 30 wt% nitric acid solution and reacted for 3 hours, and then washed six times with deionized water; The rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran were mixed and stirred at 500 rpm for 6 h. The mixture was then subjected to an ultrasonic-assisted microwave process under a nitrogen atmosphere with a flow rate of 50 sccm. The ultrasonic power was 600 W, the microwave power was 750 W, and the time was 60 min. The mixture was then precipitated with methanol, filtered, and the solid was collected to obtain a conductive composite. The mass ratio of the rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran was 0.1:1:0.1:0.06:1.5:1.6:0.02:20.

[0033] (2) A poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene) solution, a conductive composite, and graphene were mixed, stirred at 300 rpm for 40 min, and sonicated at 30 kHz for 1 h. A polyimide precursor solution was added, and electron beam irradiation crosslinking was performed under a nitrogen atmosphere with a flow rate of 50 sccm. The process parameters were: irradiation energy of 1.5 MeV and dose of 80 kGy. Then, additives were added, and the mixture was extruded at 280°C to coat a wire core made of galvanized steel. Finally, thermal stretching was performed during microwave heating at a power of 500 W, with a stretching factor of 1.2 times, to obtain a carbon-based alloy grounding material. The poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene The mass ratio of poly(2,5-bis(3-tetradecylthiophene-2-yl)thieno[3,2-b]thiophene) solution, conductive composite, graphene, polyimide precursor solution, and additives is 10:5:0.1:60:5; the poly(2,5-bis(3-tetradecylthiophene-2-yl)thieno[3,2-b]thiophene) solution is composed of PBTTT-C14 poly(2,5-bis(3-tetradecylthiophene-2-yl)thieno[3,2-b]thiophene), camphor sulfonic acid, and N-methylpyrrolidone, with a mass ratio of 10:0.3:10; the polyimide precursor solution is composed of polyamic acid and dimethylacetamide, with a mass ratio of 10:15; the additives are composed of aluminate coupling agent F-1, zeylan flavonoids, melamine, and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, with a mass ratio of 3:1.6:3:3.

[0034] Example 3

[0035] (1) Boric acid, melamine, and deionized water were mixed, rare earth nitrate was added, the temperature was raised to 120°C, stirred at 500 rpm for 2 hours, dried at 80°C for 10 hours, then heat-treated at 1300°C for 2 hours under a nitrogen atmosphere, and then washed three times with deionized water to remove unreacted substances, and then dried at 80°C for 10 hours to obtain rare earth-doped boron nitride; the mass ratio of boric acid, melamine, deionized water, and rare earth nitrate was 1:0.2:100:0.05; the rare earth nitrate was composed of cerium nitrate hexahydrate, europium nitrate hexahydrate, neodymium nitrate hexahydrate, and yttrium nitrate hexahydrate, with a molar ratio of 1:1:1:1; rare earth-doped boron nitride was mixed with 30 wt% nitric acid solution and reacted for 8 hours, and then washed six times with deionized water; The rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran were mixed and stirred at 500 rpm for 6 h. The mixture was then treated with an ultrasonic-assisted microwave process under a nitrogen atmosphere with a flow rate of 50 sccm. The ultrasonic power was 600 W, the microwave power was 750 W, and the treatment time was 80 min. The mixture was then precipitated with methanol, filtered, and the solid was collected to obtain a conductive composite. The mass ratio of the rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran was 0.1:1:0.1:0.06:1.5:1.6:0.02:20.

[0036] (2) A poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene) solution, a conductive composite, and graphene were mixed, stirred at 300 rpm for 40 min, and sonicated at 30 kHz for 1 h. A polyimide precursor solution was added, and crosslinking was performed by electron beam irradiation under a nitrogen atmosphere with a flow rate of 50 sccm. The process parameters were: irradiation energy of 1.5 MeV and dose of 100 kGy. Then, additives were added, and the mixture was extruded at 300 °C to coat a wire core made of galvanized steel. Finally, the mixture was thermally stretched during microwave heating at a power of 500 W, with a stretching factor of 1.3 times, to obtain a carbon-based alloy grounding material. The poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene The mass ratio of poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution, conductive composite, graphene, polyimide precursor solution, and additives is 10:5:0.1:80:5; the poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution is composed of PBTTT-C14 poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene), camphor sulfonic acid, and N-methylpyrrolidone, with a mass ratio of 10:0.3:10; the polyimide precursor solution is composed of polyamic acid and dimethylacetamide, with a mass ratio of 10:15; the additives are composed of aluminate coupling agent F-1, zeylan flavonoids, melamine, and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, with a mass ratio of 5:2:4:3.

[0037] Comparative Example 1

[0038] The difference between Comparative Example 1 and Example 2 is that step (1) is omitted, and step (2) is changed to: mixing poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene) solution with poly(3-hexylthiophene), stirring at 300 rpm for 40 min, sonicating at 30 kHz for 1 h, adding polyimide precursor solution, and performing electron beam irradiation crosslinking under a nitrogen atmosphere with a flow rate of 50 sccm. The process parameters are: irradiation energy of 1.5 MeV and dose of 80 kGy. Then, additives are added, and the mixture is extruded at a temperature of 280°C to coat a wire core made of galvanized steel. Finally, thermal stretching is performed during microwave heating at a power of 500 W, with a stretching factor of 1.2 times, to obtain a carbon-based alloy grounding material; the poly(2,5-bis(3-tetradecylthiophen-2-yl)... The mass ratio of thieno[3,2-b]thiophene) solution, poly(3-hexylthiophene), polyimide precursor solution, and additives is 10:5:60:5; the poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution is composed of PBTTT-C14 poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene), camphor sulfonic acid, and N-methylpyrrolidone, with a mass ratio of 10:0.3:10; the polyimide precursor solution is composed of polyamic acid and dimethylacetamide, with a mass ratio of 10:15; the additives are composed of aluminate coupling agent F-1, zeylan flavonoids, melamine, and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, with a mass ratio of 3:1.6:3:3; the remaining steps are the same as in Example 2.

[0039] Comparative Example 2

[0040] The difference between Comparative Example 2 and Example 2 lies in step (1). Step (1) is changed to: mixing boric acid, melamine, and deionized water, adding rare earth nitrate, heating to 120°C, stirring at 500 rpm for 2 hours, drying at 80°C for 10 hours, then heat-treating at 1200°C for 2 hours under a nitrogen atmosphere, then washing three times with deionized water to remove unreacted substances, and then drying at 80°C for 10 hours to obtain rare earth-doped boron nitride; the mass ratio of boric acid, melamine, deionized water, and rare earth nitrate is 1:0.2:100:0.05; the rare earth nitrate is composed of cerium nitrate hexahydrate, europium nitrate hexahydrate, neodymium nitrate hexahydrate, and yttrium nitrate hexahydrate, with a molar ratio of 1:1:1:1; mixing rare earth-doped boron nitrate with 30 wt% nitric acid solution, reacting for 3 hours, and then washing six times with deionized water to obtain activated rare earth-doped boron nitrate;

[0041] Step (2) is modified as follows: A solution of poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene), activated rare-earth-doped boron nitride, and graphene are mixed, stirred at 300 rpm for 40 min, and sonicated at 30 kHz for 1 h. A polyimide precursor solution is added, and electron beam irradiation crosslinking is performed under a nitrogen atmosphere with a flow rate of 50 sccm. The process parameters are: irradiation energy of 1.5 MeV and dose of 80 kGy. Additives are then added, and the mixture is extruded at 280°C to coat a wire core made of galvanized steel. Finally, thermal stretching is performed during microwave heating at 500 W, with a stretching factor of 1.2 times, to obtain a carbon-based alloy grounding material. The poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) The mass ratio of the solution, activated rare-earth-doped boron nitride, graphene, polyimide precursor solution, and additives is 10:5:0.1:60:5; the poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution is composed of PBTTT-C14 poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene), camphor sulfonic acid, and N-methylpyrrolidone, with a mass ratio of 10:0.3:10; the polyimide precursor solution is composed of polyamic acid and dimethylacetamide, with a mass ratio of 10:15; the additives are composed of aluminate coupling agent F-1, zeylan flavonoids, melamine, and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, with a mass ratio of 3:1.6:3:3; the remaining steps are the same as in Example 2.

[0042] Comparative Example 3

[0043] The difference between Comparative Example 3 and Example 2 lies in step (1). Step (1) is changed to: mixing boric acid, melamine, and deionized water, adding rare earth nitrate, heating to 120°C, stirring at 500 rpm for 2 hours, drying at 80°C for 10 hours, then heat-treating at 1200°C for 2 hours under a nitrogen atmosphere, then washing three times with deionized water to remove unreacted substances, and then drying at 80°C for 10 hours to obtain rare earth-doped boron nitride; the mass ratio of boric acid, melamine, deionized water, and rare earth nitrate is 1:0.2:100:0.05; the rare earth nitrate is composed of cerium nitrate hexahydrate, europium nitrate hexahydrate, neodymium nitrate hexahydrate, and yttrium nitrate hexahydrate, with a molar ratio of 1:1:1:1; rare earth-doped boron nitride is mixed with 30wt% nitrate The acid solution was mixed and reacted for 3 hours, then washed 6 times with deionized water. The activated rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran were mixed and stirred at 500 rpm for 6 hours. The mixture was then reacted at 80°C for 12 hours under a nitrogen atmosphere with a flow rate of 50 sccm. The mixture was then precipitated with methanol, filtered, and the solid was collected to obtain the conductive composite. The mass ratio of the rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran was 0.1:1:0.1:0.06:1.5:1.6:0.02:20. The remaining steps were the same as in Example 2.

[0044] Comparative Example 4

[0045] The difference between Comparative Example 4 and Example 2 lies in step (2). Step (2) is changed to: mixing the conductive composite, graphene, and polyimide precursor solution, stirring at 300 rpm for 40 min, sonicating at 30 kHz for 1 h, and then performing electron beam irradiation crosslinking under a nitrogen atmosphere with a flow rate of 50 sccm. The process parameters are: irradiation energy of 1.5 MeV and dose of 80 kGy. Then, additives are added, and the mixture is extruded at a temperature of 280°C to coat the wire core made of galvanized steel. Finally, the mixture is microwaved at a power of 500 W. During the heating process, thermal stretching is performed, with a stretching factor of 1.2 times, to obtain a carbon-based alloy grounding material; the mass ratio of the conductive composite, graphene, polyimide precursor solution, and additives is 10:5:0.1:60:5; the polyimide precursor solution is composed of polyamic acid and dimethylacetamide in a mass ratio of 10:15; the additives are composed of aluminate coupling agent F-1, zeylan flavonoids, melamine, and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline in a mass ratio of 3:1.6:3:3; the remaining steps are the same as in Example 2.

[0046] Comparative Example 5

[0047] The difference between Comparative Example 5 and Example 2 is that step (1) is omitted, and step (2) is changed to: crosslinking poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution, graphene, and polyimide precursor solution under a nitrogen atmosphere with a flow rate of 50 sccm by electron beam irradiation. The process parameters are: irradiation energy of 1.5 MeV and dose of 80 kGy. Then, additives are added, and the mixture is extruded at a temperature of 280°C to coat a wire core made of galvanized steel. Finally, the mixture is thermally stretched during microwave heating at a power of 500 W, with a stretching factor of 1.2 times, to obtain a carbon-based alloy grounding material. The poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution, graphene, and polyimide precursor solution are crosslinked by electron beam irradiation. The mass ratio of graphene, polyimide precursor solution, and additives is 10:0.1:60:5; the poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) solution is composed of PBTTT-C14 poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene), camphor sulfonic acid, and N-methylpyrrolidone, with a mass ratio of 10:0.3:10; the polyimide precursor solution is composed of polyamic acid and dimethylacetamide, with a mass ratio of 10:15; the additives are composed of aluminate coupling agent F-1, zeylan flavonoids, melamine, and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, with a mass ratio of 3:1.6:3:3; the remaining steps are the same as in Example 2.

[0048] Example of effect

[0049] Table 1 below shows the performance analysis results of the carbon-based alloy grounding materials used in Examples 1 to 3 and Comparative Examples 1 to 5 of the present invention.

[0050] Table 1

[0051] Resistivity (Ω·cm) Resistivity (corrosion test for 1000 h, Ω·cm) Example 1 1.28 1.31 Example 2 1.25 1.26 Example 3 1.27 1.29 Comparative Example 1 1.53 2.25 Comparative Example 2 1.61 1.68 Comparative Example 3 1.45 1.57 Comparative Example 4 1.49 1.62 Comparative Example 5 1.82 2.74

[0052] A comparison of the experimental data from the examples and comparative examples in Table 1 reveals that rare-earth-doped boron nitride and poly(3-hexylthiophene) form a three-dimensional conductive network in the polymer matrix, achieving high conductivity and corrosion resistance. The 3-hexylthiophene monomer adsorbs onto the defect sites of boron nitride, and the rare-earth elements enhance hole mobility and conductivity through charge transfer. Ultrasonic-assisted microwave polymerization forms poly(3-hexylthiophene), enhancing the π-π stacking effect between thiophene rings. Poly(2,5-bis(3-tetradecylthiophene-2-yl)thieno[3,2-b]thiophene), the conductive composite, and polyimide are cross-linked by electron beam irradiation to form cross-linking bonds, regulating the oxygen concentration on the metal surface, inhibiting the formation of oxygen concentration cells, extending the diffusion path of the corrosive medium, and enhancing corrosion resistance. The conductive composite and poly(2,5-bis(3-tetradecylthiophene-2-yl)thieno[3,2-b]thiophene) form a conductive network in the matrix, further improving conductivity.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. A carbon-based alloy grounding material, characterized in that, The preparation steps include the following: (1) The activated rare earth doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylideneacetone)palladium, tetra-n-butylammonium bromide, cesium carbonate, glacial acetic acid and tetrahydrofuran were mixed and treated with ultrasonic-assisted microwave process under nitrogen atmosphere, and then precipitated, filtered and the solid was taken to obtain a conductive composite. (2) A poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene) solution, a conductive composite, and a carbon material are mixed, and a polyimide precursor solution is added. The mixture is then cross-linked by electron beam irradiation under a nitrogen atmosphere. Additives are then added, and the mixture is coated onto a wire core made of galvanized steel or other metals through an extrusion process. Finally, the mixture is thermally stretched during microwave heating to obtain a carbon-based alloy grounding material.

2. The carbon-based alloy grounding material according to claim 1, characterized in that, The parameters of the ultrasonic-assisted microwave process in step (1) are: ultrasonic power of 600W, microwave power of 750W, and time of 40-80min.

3. The carbon-based alloy grounding material according to claim 1, characterized in that, The mass ratio of rare earth-doped boron nitride, 2-bromo-3-hexylthiophene, azobisisobutyronitrile, tris(dibenzylideneacetone)dipalladium, tetrabutylammonium bromide, cesium carbonate, glacial acetic acid, and tetrahydrofuran in step (1) is 0.1:1:0.1:0.06:1.5:1.6:0.02:

20.

4. The carbon-based alloy grounding material according to claim 1, characterized in that, The method for preparing rare earth-doped boron nitride in step (1) is as follows: Boric acid, melamine, and deionized water are mixed, rare earth nitrate is added, the temperature is raised to 120°C, stirred at 500 rpm for 2 hours, dried at 80°C for 10 hours, then heat-treated at 1000-1300°C for 2 hours under a nitrogen atmosphere, and then washed three times with deionized water to remove unreacted substances, and dried at 80°C for 10 hours; the mass ratio of boric acid, melamine, deionized water, and rare earth nitrate is 1:0.2:100:0.

05.

5. The carbon-based alloy grounding material according to claim 4, characterized in that, The rare earth nitrate is composed of cerium nitrate hexahydrate, europium nitrate hexahydrate, neodymium nitrate hexahydrate, and yttrium nitrate hexahydrate, with a molar ratio of 1:1:1:

1.

6. The carbon-based alloy grounding material according to claim 1, characterized in that, The process parameters for electron beam irradiation in step (2) are: irradiation energy of 1.5 MeV and dose of 50-100 kGy.

7. The carbon-based alloy grounding material according to claim 1, characterized in that, In step (2), the mass ratio of the poly(2,5-bis(3-tetradecylthiophen-2-yl)thiopheno[3,2-b]thiophene) solution, conductive composite, carbon material, polyimide precursor solution, and additives is 10:5:0.1:50 to 80:

5.

8. The carbon-based alloy grounding material according to claim 1, characterized in that, The temperature of the extrusion process in step (2) is 260-300℃.

9. The carbon-based alloy grounding material according to claim 1, characterized in that, The microwave heating power in step (2) is 500W.

10. The carbon-based alloy grounding material according to claim 1, characterized in that, The thermal elongation ratio in step (2) is 1.1 to 1.3 times.