Carbon fiber reinforced high strength aerial cable and method of making same

Abstract

The application relates to the technical field of cables, and discloses a carbon fiber reinforced high-strength overhead cable and a preparation method thereof. The carbon fiber reinforced high-strength overhead cable comprises, from inside to outside, a conductor, an insulation layer, a shielding layer and an outer sheath. The outer sheath comprises the following components in parts by weight: binary fluorine rubber 20-30 parts, ternary fluorine rubber 70-80 parts, carbon fiber loaded hydrotalcite 10-13 parts, magnesium oxide 1.5-2.5 parts, calcium oxide 1-2 parts, ultraviolet light absorber 0.8-1.6 parts, antioxidant 0.6-1.2 parts, flame retardant 10-15 parts, lubricant 0.5-0.8 parts, vulcanizing agent 1-1.5 parts and vulcanizing aid 0.5-1.5 parts. Through the technical scheme, the problem of insufficient strength when the carbon fiber is applied to the overhead cable in the prior art is solved.

Description

Carbon fiber reinforced high-strength overhead cable and its preparation method Technical Field

[0001] This invention relates to the field of cable technology, specifically to carbon fiber reinforced high-strength overhead cables and their preparation methods. Background Technology

[0002] As the core carrier of power transmission systems, overhead cables are widely used in urban distribution networks, inter-regional power transmission, and power supply to remote areas. Their performance directly determines the stability, safety, and economy of power transmission. However, in complex terrain scenarios such as crossing rivers and mountains, cables need to withstand greater mechanical forces such as their own weight, wind loads, and snow and ice loads, which places higher demands on the strength performance of overhead cables.

[0003] Fiber-reinforced composite materials, due to their lightweight, high strength, and corrosion resistance, are used for reinforcing and modifying the outer sheaths of overhead cables. Currently, related technologies utilize materials such as glass fiber, aramid fiber, and carbon fiber to prepare cable outer sheaths. Among these, carbon fiber, as a high-performance fiber material, possesses excellent properties such as high specific strength, high specific modulus, low density, corrosion resistance, and UV resistance, making it an ideal material for reinforcing and modifying cable outer sheaths and improving their tensile strength. However, its surface inertness and poor interfacial bonding with polymer matrix materials make it prone to interfacial delamination, preventing the full improvement of the tensile strength of the outer sheath and hindering the full realization of the reinforcing advantages of carbon fiber. Summary of the Invention

[0004] This invention proposes a carbon fiber reinforced high-strength overhead cable and its preparation method, which solves the problem of insufficient strength when carbon fiber is applied to overhead cables in related technologies.

[0005] The technical solution of the present invention is as follows:

[0006] This invention proposes a carbon fiber reinforced high-strength overhead cable, comprising, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 20-30 parts of binary fluororubber, 70-80 parts of ternary fluororubber, 10-13 parts of carbon fiber loaded hydrotalcite, 1.5-2.5 parts of magnesium oxide, 1-2 parts of calcium oxide, 0.8-1.6 parts of ultraviolet absorber, 0.6-1.2 parts of antioxidant, 10-15 parts of flame retardant, 0.5-0.8 parts of lubricant, 1-1.5 parts of vulcanizing agent, and 0.5-1.5 parts of vulcanizing aid.

[0007] As a further technical solution, the preparation method of the carbon fiber-loaded hydrotalcite includes the following steps:

[0008] S1. Oxidize the carbon fiber in concentrated nitric acid, wash with water until neutral, and dry to obtain oxidized carbon fiber;

[0009] S2, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate are added to water to obtain a metal salt solution; sodium hydroxide solution and sodium carbonate solution are mixed to obtain a mixed alkaline solution;

[0010] S3. Add carbon dioxide to water, sonicate, then add the metal salt solution and the mixed alkaline solution, adjust the pH to 10~10.5, stir, filter, wash and dry to obtain carbon fiber loaded hydrotalcite.

[0011] As a further technical solution, the carbon fiber is cleaned before oxidation; the cleaning solution is acetone, and the cleaning time is 46-48 hours.

[0012] As a further technical solution, the concentrated nitric acid has a mass fraction of 65% to 68%.

[0013] As a further technical solution, the oxidation temperature is 90~100℃ and the time is 2~2.5h.

[0014] As a further technical solution, in step S1, the drying temperature is 80~100℃ and the time is 10~12h.

[0015] As a further technical solution, the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate is 2:1.

[0016] As a further technical solution, the concentration of cations in the metal salt solution is 0.9~1.1 mol / L.

[0017] As a further technical solution, the concentration of the sodium hydroxide solution is 1.4~1.6 mol / L.

[0018] As a further technical solution, the concentration of the sodium carbonate solution is 0.6~0.7 mol / L.

[0019] As a further technical solution, the mass ratio of the oxidized carbon fiber to water is 4:90~100.

[0020] As a further technical solution, the total mass ratio of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate to carbon dioxide carbon fiber is 2~4:1.

[0021] In the overhead cable outer sheath of this invention, when the total mass ratio of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate to carbon dioxide carbon fiber is 2~4:1, the strength of the overhead cable is improved. When the amount of metal salt added is low, the load capacity is insufficient, the bonding force with rubber is insufficient, and the tensile strength of the outer sheath is reduced. When the amount of metal salt added is too high, the dispersion of carbon fiber is affected, which in turn affects the tensile strength of the outer sheath.

[0022] As a further technical solution, the power of the ultrasound is 100~300w, and the duration is 3.5~4.5h.

[0023] As a further technical solution, the stirring speed is 200~300 rpm, the time is 5~7 h, and the temperature is 55~65℃.

[0024] As a further technical solution, in step S3, the drying temperature is 60~80℃ and the time is 12~14h.

[0025] As a further technical solution, the ultraviolet absorber includes one of ultraviolet absorber UV-531 and ultraviolet absorber UV-327.

[0026] In the overhead cable outer sheath of the present invention, the addition of ultraviolet absorber can improve the anti-ultraviolet aging performance of the overhead cable outer sheath. The ultraviolet absorber can be one or more of the conventional ultraviolet absorbers in the art, such as ultraviolet absorber UV-329, ultraviolet absorber UV-531, ultraviolet absorber UV-327, etc. Preferably, the ultraviolet absorber is one of ultraviolet absorber UV-531 and ultraviolet absorber UV-327.

[0027] As a further technical solution, the antioxidant includes one or both of antioxidant 1010 and antioxidant 168.

[0028] In the overhead cable outer sheath of the present invention, the addition of antioxidants can improve the resistance of the overhead cable outer sheath to thermo-oxidative aging. The antioxidants can be one or more of the conventional antioxidants in the art, such as antioxidant 1010, antioxidant 168, antioxidant 1076, etc. Preferably, the antioxidants are one or two of antioxidant 1010 and antioxidant 168.

[0029] As a further technical solution, the flame retardant includes aluminum hydroxide and magnesium hydroxide.

[0030] As a further technical solution, the lubricant includes one of calcium stearate and zinc stearate.

[0031] In the overhead cable outer sheath of the present invention, the addition of lubricant can improve the processing performance of the outer sheath. The lubricant can be one or more conventional lubricants in the art, such as calcium stearate, zinc stearate, paraffin wax, etc. Preferably, the lubricant is one of calcium stearate and zinc stearate.

[0032] As a further technical solution, the vulcanizing agent includes bisphenol AF.

[0033] As a further technical solution, the vulcanization aid includes benzyltriphenylphosphine chloride.

[0034] As a further technical solution, the binary fluororubber includes a first binary fluororubber and a second binary fluororubber with a mass ratio of 7:3.

[0035] The ternary fluororubber includes a first ternary fluororubber and a second ternary fluororubber with a mass ratio of 1:1.

[0036] The first binary fluororubber and the second binary fluororubber have different Mooney viscosities; the first ternary fluororubber and the second ternary fluororubber have different Mooney viscosities.

[0037] As a further technical solution, the Mooney viscosity of the first binary fluororubber ML(1+10)@121℃ is 45; the Mooney viscosity of the second binary fluororubber ML(1+10)@121℃ is 100; the Mooney viscosity of the first ternary fluororubber ML(1+10)@121℃ is 40; and the Mooney viscosity of the second ternary fluororubber ML(1+10)@121℃ is 80.

[0038] In the overhead cable outer sheath of this invention, when the binary fluororubber is a first binary fluororubber and a second binary fluororubber with a mass ratio of 7:3, and the ternary fluororubber is a first ternary fluororubber and a second ternary fluororubber with a mass ratio of 1:1, the low Mooney viscosity fluororubber ensures smooth processing, while the high Mooney viscosity fluororubber provides higher tensile strength after molding. Simultaneously, the different structures of the fluororubbers at this mass ratio complement each other. The binary fluororubber provides certain rigidity and initial high-temperature resistance, but its high-temperature resistance is insufficient in long-term high-temperature environments. The addition of the ternary fluororubber can further improve long-term high-temperature resistance, enabling the outer sheath to resist thermal degradation and thermal deformation under long-term high-temperature conditions, thereby improving the high-temperature resistance of the overhead cable outer sheath and further enhancing the high-temperature performance of the overhead cable.

[0039] This invention also proposes a method for preparing carbon fiber reinforced high-strength overhead cables, comprising the following steps:

[0040] The outer sheath mixture is prepared by sequentially adding binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber, antioxidant, flame retardant, and lubricant, and finally adding vulcanizing agent and vulcanization aid.

[0041] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a cable semi-finished product. The outer sheath mixture is then extruded onto the outside of the cable semi-finished product and vulcanized to obtain a carbon fiber reinforced high-strength overhead cable.

[0042] The working principle and beneficial effects of this invention are as follows:

[0043] In this invention, when carbon fiber loaded with hydrotalcite is added to the outer sheath of an overhead cable, the high strength of the carbon fiber forms a high-strength support network in the matrix, and the hydrotalcite reduces the impact of external forces. When the hydrotalcite is loaded on the surface of the carbon fiber, the surface of the carbon fiber becomes rougher, the bonding force between the carbon fiber and the rubber is enhanced, and the carbon fiber loaded with hydrotalcite can also inhibit the movement of rubber molecules, further improving the tensile strength of the outer sheath of the overhead cable, thereby improving the strength of the overhead cable. Detailed Implementation

[0044] 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.

[0045] In the following embodiments and comparative examples,

[0046] First-grade binary fluororubber: model FE2601-40, manufacturer is Shanghai Huayi Sanaifu New Materials Co., Ltd.;

[0047] Second binary fluororubber: Model FE2602-100, manufactured by Shanghai Huayi Sanaifu New Materials Co., Ltd.

[0048] First ternary fluororubber: Model FE2465-40, manufacturer is Shanghai Huayi Sanaifu New Materials Co., Ltd.;

[0049] Secondary fluoropolymer: Model FE2465-80, manufactured by Shanghai Huayi Sanaifu New Materials Co., Ltd.

[0050] Carbon fiber: 7μm in diameter and 5mm in length;

[0051] Magnesium aluminum hydrotalcite: Model number XY11097-59-9, manufacturer is Wuhan Xinyang Ruihe Chemical Technology Co., Ltd.

[0052] Example 1

[0053] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 20 parts of binary fluororubber, 80 parts of ternary fluororubber, 10 parts of carbon fiber loaded hydrotalcite, 1.5 parts of magnesium oxide, 1 part of calcium oxide, 0.8 parts of UV absorber UV-531, 0.6 parts of antioxidant 1010, 6 parts of aluminum hydroxide, 4 parts of magnesium hydroxide, 0.5 parts of calcium stearate, 1 part of bisphenol AF, and 0.5 parts of benzyltriphenylphosphine chloride.

[0054] Binary fluororubber is the first binary fluororubber, and ternary fluororubber is the first ternary fluororubber;

[0055] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0056] Carbon fibers were soaked in acetone for 46 hours, then placed in 65% concentrated nitric acid at 90°C for 2.5 hours to oxidize, rinsed with water until neutral, and dried at 80°C for 12 hours to obtain oxidized carbon fibers.

[0057] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 0.9 mol / L; a 1.4 mol / L sodium hydroxide solution and a 0.6 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0058] Carbon oxide was added to water (the mass ratio of carbon oxide to water was 4:90), and sonicated at 100W for 4.5h. Then, a metal salt solution and a mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was in a mass ratio of 1:1 to carbon oxide). The amount of mixed alkali solution added was based on adjusting the pH of the mixture to 10. The mixture was stirred at 55℃ and 300rpm for 5h, filtered, washed with deionized water until neutral, and dried at 80℃ for 12h to obtain carbon fiber-loaded hydrotalcite.

[0059] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0060] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-531, antioxidant 1010, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was then stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0061] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0062] Example 2

[0063] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components by weight: 30 parts of binary fluororubber, 70 parts of ternary fluororubber, 13 parts of carbon fiber loaded hydrotalcite, 2.5 parts of magnesium oxide, 2 parts of calcium oxide, 1.6 parts of UV absorber UV-327, 0.8 parts of antioxidant 1010, 0.4 parts of antioxidant 168, 11 parts of aluminum hydroxide, 4 parts of magnesium hydroxide, 0.8 parts of zinc stearate, 1.5 parts of bisphenol AF, and 1.5 parts of benzyltriphenylphosphine chloride.

[0064] Binary fluororubber is the first binary fluororubber, and ternary fluororubber is the first ternary fluororubber;

[0065] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0066] Carbon fibers were soaked in acetone for 48 hours, then placed in 68% concentrated nitric acid at 100°C for 2 hours to oxidize, rinsed with water until neutral, and dried at 100°C for 10 hours to obtain oxidized carbon fibers.

[0067] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 1.1 mol / L; a 1.6 mol / L sodium hydroxide solution and a 0.7 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0068] Carbon oxide was added to water (the mass ratio of carbon oxide to water was 4:100), and sonicated at 300 W for 3.5 h. Then, a metal salt solution and a mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was in a mass ratio of 1:1 to carbon oxide). The amount of mixed alkali solution added was based on adjusting the pH of the mixture to 10.5. The mixture was stirred at 65 °C and 200 rpm for 7 h, filtered, washed with deionized water until neutral, and dried at 60 °C for 14 h to obtain carbon fiber-loaded hydrotalcite.

[0069] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0070] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-327, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and zinc stearate. The mixture was stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0071] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0072] Example 3

[0073] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of carbon fiber loaded hydrotalcite, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0074] Binary fluororubber is the first binary fluororubber, and ternary fluororubber is the first ternary fluororubber;

[0075] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0076] Carbon fibers were soaked in acetone for 48 hours, then placed in 68% concentrated nitric acid at 90°C for 2.3 hours to oxidize, rinsed with water until neutral, and dried at 90°C for 11 hours to obtain oxidized carbon fibers.

[0077] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 1.0 mol / L; a 1.5 mol / L sodium hydroxide solution and a 0.65 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0078] Carbon oxide carbon fiber was added to water (mass ratio of carbon oxide carbon fiber to water was 4:100), and sonicated at 300W for 3.5h. Then, metal salt solution and mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was 1:1 with the mass ratio of carbon oxide carbon fiber to the total mass of the mixed alkali solution). The amount of mixed alkali solution added was based on adjusting the pH of the mixed solution to 10. The mixture was stirred at 60℃ and 250rpm for 6h, filtered, washed with deionized water until neutral, and dried at 70℃ for 13h to obtain carbon fiber-loaded hydrotalcite.

[0079] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0080] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0081] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0082] Example 4

[0083] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of carbon fiber loaded hydrotalcite, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0084] Binary fluororubber is the first binary fluororubber, and ternary fluororubber is the first ternary fluororubber;

[0085] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0086] Carbon fibers were soaked in acetone for 48 hours, then placed in 68% concentrated nitric acid at 90°C for 2.3 hours to oxidize, rinsed with water until neutral, and dried at 90°C for 11 hours to obtain oxidized carbon fibers.

[0087] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 1.0 mol / L; a 1.5 mol / L sodium hydroxide solution and a 0.65 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0088] Carbon oxide was added to water (the mass ratio of carbon oxide to water was 4:100), and sonicated at 300W for 3.5h. Then, a metal salt solution and a mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was in the mass ratio of carbon oxide to carbon oxide of 2:1). The amount of mixed alkali solution added was based on adjusting the pH of the mixture to 10. The mixture was stirred at 60℃ and 250rpm for 6h, filtered, washed with deionized water until neutral, and dried at 70℃ for 13h to obtain carbon fiber-loaded hydrotalcite.

[0089] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0090] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0091] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0092] Example 5

[0093] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of carbon fiber loaded hydrotalcite, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0094] Binary fluororubber is the first binary fluororubber, and ternary fluororubber is the first ternary fluororubber;

[0095] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0096] Carbon fibers were soaked in acetone for 48 hours, then placed in 68% concentrated nitric acid at 90°C for 2.3 hours to oxidize, rinsed with water until neutral, and dried at 90°C for 11 hours to obtain oxidized carbon fibers.

[0097] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 1.0 mol / L; a 1.5 mol / L sodium hydroxide solution and a 0.65 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0098] Carbon oxide carbon fiber was added to water (mass ratio of carbon oxide carbon fiber to water was 4:100), and sonicated at 300W for 3.5h. Then, metal salt solution and mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was in the mass ratio of carbon oxide carbon fiber to carbon oxide carbon fiber was 4:1). The amount of mixed alkali solution added was based on adjusting the pH of the mixture to 10. The mixture was stirred at 60℃ and 250rpm for 6h, filtered, washed with deionized water until neutral, and dried at 70℃ for 13h to obtain carbon fiber-loaded hydrotalcite.

[0099] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0100] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0101] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0102] Example 6

[0103] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of carbon fiber loaded hydrotalcite, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0104] Binary fluororubber is the first binary fluororubber, and ternary fluororubber is the first ternary fluororubber;

[0105] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0106] Carbon fibers were soaked in acetone for 48 hours, then placed in 68% concentrated nitric acid at 90°C for 2.3 hours to oxidize, rinsed with water until neutral, and dried at 90°C for 11 hours to obtain oxidized carbon fibers.

[0107] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 1.0 mol / L; a 1.5 mol / L sodium hydroxide solution and a 0.65 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0108] Carbon oxide carbon fiber was added to water (mass ratio of carbon oxide carbon fiber to water was 4:100), and sonicated at 300W for 3.5h. Then, metal salt solution and mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was in the mass ratio of carbon oxide carbon fiber to carbon oxide carbon fiber was 5:1). The amount of mixed alkali solution added was based on adjusting the pH of the mixture to 10. The mixture was stirred at 60℃ and 250rpm for 6h, filtered, washed with deionized water until neutral, and dried at 70℃ for 13h to obtain carbon fiber-loaded hydrotalcite.

[0109] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0110] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0111] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0112] Example 7

[0113] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of carbon fiber loaded hydrotalcite, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0114] Binary fluororubber is composed of a first binary fluororubber and a second binary fluororubber in a mass ratio of 7:3; ternary fluororubber is composed of a first ternary fluororubber and a second ternary fluororubber in a mass ratio of 1:1.

[0115] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0116] Carbon fibers were soaked in acetone for 48 hours, then placed in 68% concentrated nitric acid at 90°C for 2.3 hours to oxidize, rinsed with water until neutral, and dried at 90°C for 11 hours to obtain oxidized carbon fibers.

[0117] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 1.0 mol / L; a 1.5 mol / L sodium hydroxide solution and a 0.65 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0118] Carbon oxide carbon fiber was added to water (mass ratio of carbon oxide carbon fiber to water was 4:100), and sonicated at 300W for 3.5h. Then, metal salt solution and mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was in the mass ratio of carbon oxide carbon fiber to carbon oxide carbon fiber was 4:1). The amount of mixed alkali solution added was based on adjusting the pH of the mixture to 10. The mixture was stirred at 60℃ and 250rpm for 6h, filtered, washed with deionized water until neutral, and dried at 70℃ for 13h to obtain carbon fiber-loaded hydrotalcite.

[0119] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0120] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0121] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0122] Example 8

[0123] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of carbon fiber loaded hydrotalcite, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0124] Binary fluororubber is composed of a first binary fluororubber and a second binary fluororubber in a mass ratio of 8:2; ternary fluororubber is composed of a first ternary fluororubber and a second ternary fluororubber in a mass ratio of 1:1.

[0125] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0126] Carbon fibers were soaked in acetone for 48 hours, then placed in 68% concentrated nitric acid at 90°C for 2.3 hours to oxidize, rinsed with water until neutral, and dried at 90°C for 11 hours to obtain oxidized carbon fibers.

[0127] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 1.0 mol / L; a 1.5 mol / L sodium hydroxide solution and a 0.65 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0128] Carbon oxide carbon fiber was added to water (mass ratio of carbon oxide carbon fiber to water was 4:100), and sonicated at 300W for 3.5h. Then, metal salt solution and mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was in the mass ratio of carbon oxide carbon fiber to carbon oxide carbon fiber was 4:1). The amount of mixed alkali solution added was based on adjusting the pH of the mixture to 10. The mixture was stirred at 60℃ and 250rpm for 6h, filtered, washed with deionized water until neutral, and dried at 70℃ for 13h to obtain carbon fiber-loaded hydrotalcite.

[0129] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0130] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0131] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0132] Example 9

[0133] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of carbon fiber loaded hydrotalcite, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0134] Binary fluororubber is composed of a first binary fluororubber and a second binary fluororubber in a mass ratio of 8:2; ternary fluororubber is composed of a first ternary fluororubber and a second ternary fluororubber in a mass ratio of 3:2.

[0135] The preparation process of carbon fiber-supported hydrotalcite includes the following steps:

[0136] Carbon fibers were soaked in acetone for 48 hours, then placed in 68% concentrated nitric acid at 90°C for 2.3 hours to oxidize, rinsed with water until neutral, and dried at 90°C for 11 hours to obtain oxidized carbon fibers.

[0137] Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate were added to water (the molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate was 2:1) to obtain a metal salt solution with a cation concentration of 1.0 mol / L; a 1.5 mol / L sodium hydroxide solution and a 0.65 mol / L sodium carbonate solution with a volume ratio of 1:1 were mixed to obtain a mixed alkaline solution.

[0138] Carbon oxide carbon fiber was added to water (mass ratio of carbon oxide carbon fiber to water was 4:100), and sonicated at 300W for 3.5h. Then, metal salt solution and mixed alkali solution were added (the total mass of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate was in the mass ratio of carbon oxide carbon fiber to carbon oxide carbon fiber was 4:1). The amount of mixed alkali solution added was based on adjusting the pH of the mixture to 10. The mixture was stirred at 60℃ and 250rpm for 6h, filtered, washed with deionized water until neutral, and dried at 70℃ for 13h to obtain carbon fiber-loaded hydrotalcite.

[0139] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0140] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0141] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0142] Comparative Example 1

[0143] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of carbon fiber, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0144] Binary fluororubber is the first binary fluororubber, and ternary fluororubber is the first ternary fluororubber;

[0145] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0146] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber, UV absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide, and calcium stearate. The mixture was then stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0147] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0148] Comparative Example 2

[0149] Carbon fiber reinforced high-strength overhead cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 25 parts of binary fluororubber, 75 parts of ternary fluororubber, 12 parts of a mixture of carbon fiber and hydrotalcite, 2 parts of magnesium oxide, 1.5 parts of calcium oxide, 1.2 parts of UV absorber UV-531, 0.7 parts of antioxidant 1010, 0.3 parts of antioxidant 168, 9 parts of aluminum hydroxide, 3 parts of magnesium hydroxide, 0.6 parts of calcium stearate, 1.2 parts of bisphenol AF, and 1.0 part of benzyltriphenylphosphine chloride.

[0150] Binary fluororubber is the first binary fluororubber, and ternary fluororubber is the first ternary fluororubber;

[0151] A method for preparing a mixture of carbon fiber and hydrotalcite includes the following steps:

[0152] Carbon fiber and magnesium aluminum hydrotalcite were directly mixed in a mass ratio of 3:1 to obtain a mixture of carbon fiber and hydrotalcite.

[0153] A method for preparing carbon fiber reinforced high-strength overhead cables includes the following steps:

[0154] The following materials were added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber and hydrotalcite mixture, ultraviolet absorber UV-531, antioxidant 1010, antioxidant 168, aluminum hydroxide, magnesium hydroxide and calcium stearate. The mixture was then stirred evenly at 80°C. Finally, bisphenol AF and benzyltriphenylphosphine chloride were added at 65°C and stirred for 2 minutes to obtain the outer sheath mixture.

[0155] An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a semi-finished cable. The outer sheath mixture is then extruded onto the outside of the semi-finished cable and vulcanized at 180°C for 10 minutes, followed by vulcanization at 200°C for 2.5 hours to obtain a carbon fiber reinforced high-strength overhead cable.

[0156] The carbon fiber reinforced high-strength overhead cable outer sheaths prepared in Examples 1-9 and Comparative Examples 1-2 were tested according to the following methods:

[0157] 1. Tensile strength: Tested according to GB / T 528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber", using dumbbell-shaped type 1A specimens with a thickness of 2mm.

[0158] 2. High temperature resistance test: According to GB / T 3512-2014 "Accelerated aging and heat resistance test of vulcanized rubber or thermoplastic rubber in hot air", the aging temperature is 160℃ and the time is 168h;

[0159] Tensile strength retention rate = (Tensile strength after high temperature resistance test treatment / Tensile strength before treatment) × 100%;

[0160] The test results are shown in Table 1:

[0161] Table 1 Performance test results of carbon fiber reinforced high-strength overhead cable outer sheaths prepared in Examples 1-9 and Comparative Examples 1-2

[0162]

[0163] 1. Compared with Comparative Examples 1 and 2, the tensile strength of the overhead cable outer sheaths prepared in Examples 1 to 9 is significantly higher than that in Comparative Examples 1 and 2. This indicates that adding carbon fiber loaded hydrotalcite to the outer sheath can improve the tensile strength of the overhead cable outer sheath, thereby improving the tensile strength of the overhead cable.

[0164] 2. Compared with Examples 3 to 6, the tensile strength of the overhead cable outer sheath prepared in Examples 4 to 5 is higher than that in Examples 3 and 6. This indicates that when preparing carbon fiber loaded with hydrotalcite, adjusting the total mass ratio of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate to carbon dioxide carbon fiber to 2 to 4:1 can improve the tensile strength of the overhead cable outer sheath and further improve the tensile strength of the overhead cable.

[0165] 3. Comparing Examples 5 and 7-9, the tensile strength of the overhead cable outer sheath obtained in Examples 7-9 is higher than that in Example 5, and the tensile strength retention rate after high-temperature treatment is also higher than that in Example 5. This indicates that using binary fluororubber with different Mooney viscosities and ternary fluororubber with different Mooney viscosities together can further improve the tensile strength and high-temperature resistance of the overhead cable outer sheath. The tensile strength and tensile strength retention rate after high-temperature treatment of the overhead cable outer sheath obtained in Example 7 are higher than those in Examples 8-9. This indicates that when the binary fluororubber is a first binary fluororubber and a second binary fluororubber with a mass ratio of 7:3, and the ternary fluororubber is a first ternary fluororubber and a second ternary fluororubber with a mass ratio of 1:1, the tensile strength and high-temperature resistance of the overhead cable outer sheath are better, thus the tensile strength and high-temperature resistance of the overhead cable are better.

[0166] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A carbon fiber reinforced high-strength overhead cable, characterized in that, From the inside out, it includes a conductor, an insulating layer, a shielding layer, and an outer sheath. The outer sheath comprises the following components in parts by weight: 20-30 parts of binary fluororubber, 70-80 parts of ternary fluororubber, 10-13 parts of carbon fiber-loaded hydrotalcite, 1.5-2.5 parts of magnesium oxide, 1-2 parts of calcium oxide, 0.8-1.6 parts of ultraviolet absorber, 0.6-1.2 parts of antioxidant, 10-15 parts of flame retardant, 0.5-0.8 parts of lubricant, 1-1.5 parts of vulcanizing agent, and 0.5-1.5 parts of vulcanizing aid. The method for preparing carbon fiber loaded with hydrotalcite includes the following steps: S1, oxidizing carbon fiber in concentrated nitric acid, washing with water until neutral, and drying to obtain oxidized carbon fiber; S2. Magnesium nitrate hexahydrate and aluminum nitrate nonahydrate are added to water to obtain a metal salt solution; sodium hydroxide solution and sodium carbonate solution are mixed to obtain a mixed alkaline solution; S3. Carbon dioxide is added to water, sonicated, and then the metal salt solution and the mixed alkaline solution are added to adjust the pH to 10-10.

5. The mixture is stirred, filtered, washed, and dried to obtain carbon fiber-loaded hydrotalcite; the total mass ratio of magnesium nitrate hexahydrate and aluminum nitrate nonahydrate to carbon dioxide is 2-4:1; the binary fluororubber includes a first binary fluororubber and a second binary fluororubber with a mass ratio of 7:3; the ternary fluororubber includes a first ternary fluororubber and a second ternary fluororubber with a mass ratio of 1:1; the first binary fluororubber and the second binary fluororubber have different Mooney viscosities; the first ternary fluororubber and the second ternary fluororubber have different Mooney viscosities.

2. The carbon fiber reinforced high-strength overhead cable according to claim 1, characterized in that, The concentrated nitric acid has a mass fraction of 65% to 68%; the oxidation temperature is 90 to 100°C, and the time is 2 to 2.5 hours.

3. The carbon fiber reinforced high-strength overhead cable according to claim 1, characterized in that, The molar ratio of magnesium nitrate hexahydrate to aluminum nitrate nonahydrate is 2:1; the concentration of cations in the metal salt solution is 0.9~1.1 mol / L; the concentration of sodium hydroxide solution is 1.4~1.6 mol / L; and the concentration of sodium carbonate solution is 0.6~0.7 mol / L.

4. The carbon fiber reinforced high-strength overhead cable according to claim 1, characterized in that, The mass ratio of the oxidized carbon fiber to water is 4:90~100.

5. The carbon fiber reinforced high-strength overhead cable according to claim 1, characterized in that, The ultraviolet absorber includes one of ultraviolet absorber UV-531 and ultraviolet absorber UV-327; the antioxidant includes one or both of antioxidant 1010 and antioxidant 168.

6. The carbon fiber reinforced high-strength overhead cable according to claim 1, characterized in that, The flame retardant includes aluminum hydroxide and magnesium hydroxide; the lubricant includes one of calcium stearate and zinc stearate.

7. The carbon fiber reinforced high-strength overhead cable according to claim 1, characterized in that, The vulcanizing agent includes bisphenol AF; the vulcanizing aid includes benzyltriphenylphosphine chloride.

8. A method for preparing carbon fiber reinforced high-strength overhead cable, used to prepare the carbon fiber reinforced high-strength overhead cable according to any one of claims 1 to 7, characterized in that, Includes the following steps: The following materials are added sequentially: binary fluororubber, ternary fluororubber, magnesium oxide, calcium oxide, carbon fiber loaded hydrotalcite, ultraviolet absorber, antioxidant, flame retardant, and lubricant. Finally, vulcanizing agent and vulcanization aid are added and mixed to obtain an outer sheath compound. An insulation layer and a shielding layer are sequentially wrapped around the conductor to obtain a cable semi-finished product. The outer sheath compound is then extruded onto the outside of the cable semi-finished product and vulcanized to obtain a carbon fiber reinforced high-strength overhead cable.

Images