High strength corrosion resistant cable and method of manufacture

Abstract

The application discloses a kind of high-strength corrosion-resistant cable and manufacturing method thereof, belong to cable technical field.High-strength corrosion-resistant cable, from inside to outside, include conductor core, shielding layer, insulating layer, inner protective layer and sheath layer in sequence.Conductor core is wrapped shielding layer outside, then insulating layer is extruded and packed outside shielding layer, then inner protective layer is extruded and packed outside insulating layer, finally, sheath layer is extruded and packed outside inner protective layer, that is, high-strength corrosion-resistant cable.The application contains nanometer silicon dioxide, glass fiber, long carbon chain and abundant fluorine element in auxiliary agent, and there is dense hybrid crosslinking network between auxiliary agent and matrix resin, filler treated by coupling agent, so that auxiliary agent and filler are highly dispersed and stably exist in sheath layer, can fully play a role, and further, the sheath layer of the application has stable excellent corrosion resistance, mechanical strength and flame-retardant smoke-suppression effect, and wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cables, and particularly relates to a high-strength corrosion-resistant cable and a manufacturing method thereof. BACKGROUND

[0002] A cable generally comprises four components, i.e., a core (conductor), an insulation layer, an inner protective layer and a sheath layer, and is usually erected in the air or installed underground or underwater, and is used for transmitting electric (magnetic) energy, information and realizing electromagnetic energy conversion. For example, the cable is widely used in the fields of power equipment and transmission, communication and aerospace.

[0003] The sheath layer of the cable protects the power cable from the invasion of external impurities and moisture, and prevents external force from directly damaging the power cable. However, since the power cable is widely laid, the power cable is more easily corroded when laid in some humid areas or acidic or alkaline environments, which greatly affects the function of the cable and shortens the service life of the cable. In addition, most of the communication cables used in life have to be bent several times, and a slight carelessness will cause the inner wire to break, affecting the transmission of signals and normal communication use of people. At present, high-strength cables have also begun to be developed on the market, but due to the poor compatibility between inorganic fillers and organic raw materials, the raw materials of the sheath layer cannot be uniformly mixed during the mixing process, which greatly reduces the strength of the cable. Therefore, it is urgent to manufacture a high-strength corrosion-resistant cable to prolong the service life of the cable and expand the application field of the cable. SUMMARY

[0004] The present application aims to overcome the defects of the prior art and provides a high-strength corrosion-resistant cable and a manufacturing method thereof.

[0005] The object of the present application can be achieved by the following technical solutions.

[0006] A high-strength corrosion-resistant cable comprises, from the inside to the outside, a conductor core, a shielding layer, an insulation layer, an inner protective layer and a sheath layer.

[0007] Further, the conductor core is formed by twisting copper wires.

[0008] Further, the shielding layer is composed of polyethylene as a base material and carbon black.

[0009] Further, the insulation layer is one or more of a polyperfluoroethylene propylene insulation layer, a cross-linked polyethylene insulation layer and a butyl rubber insulation layer.

[0010] Further, the inner protective layer is one or more of a polyvinyl chloride inner protective layer, a polyethylene inner protective layer and a cross-linked polyethylene inner protective layer.

[0011] Further, the sheath layer is prepared by the following steps: 15-25 parts by weight of ethylene-vinyl acetate copolymer, 10-15 parts by weight of ethylene-acrylate copolymer, 6-12 parts by weight of polyvinyl chloride resin, 20-30 parts by weight of additives, 20-30 parts by weight of filler, 2-5 parts by weight of pigment, 1-3 parts by weight of coupling agent, 1-3 parts by weight of lubricant, 0.5-1 parts by weight of antioxidant, 0.5-1 parts by weight of ultraviolet absorber, and 0.01-0.1 parts by weight of crosslinking agent are weighed and mixed evenly, then extruded and granulated in a twin-screw extruder, and then extruded into a sheath layer.

[0012] Furthermore, the auxiliary agent is prepared by the following steps:

[0013] S1. Replace the air in the dry three-necked flask with nitrogen, then add 1H,1H-undecanohexylamine, epoxide, and chloroform in sequence. After thorough stirring, heat to 65℃ and maintain the temperature for 6 hours. After the reaction is complete, cool to room temperature first, then distill under reduced pressure and purify by column chromatography (using a mixed solvent of chloroform and acetone as the eluent, with a volume ratio of 19:1). Distill under reduced pressure to obtain intermediate 1; the volume ratio of 1H,1H-undecanohexylamine, epoxide, and chloroform is 44.6 mL:16 mL:250 mL.

[0014] By controlling the molar ratio of 1H,1H-undecanohexylamine to epoxide butene to be 1.1-1.2:1, an addition reaction occurs between the -NH2 group of 1H,1H-undecanohexylamine and the epoxy group of epoxide butene under heating conditions. The reaction process is shown below:

[0015]

[0016] S2. Under nitrogen protection, intermediate 1, triethylamine, and dimethyl sulfoxide were added to a dry three-necked flask and stirred until dissolved. Then, chlorooctadecane was slowly added. After the addition was complete, the temperature was raised to 80°C and the reaction was stirred for 3 hours. After the reaction was completed, the mixture was cooled to room temperature and then purified by vacuum distillation and column chromatography (using a mixed solvent of benzene and chloroform as the eluent, with a volume ratio of benzene to chloroform of 1:1). Vacuum distillation was performed to obtain intermediate 2. The molar ratio of intermediate 1, chlorooctadecane, triethylamine, and dimethyl sulfoxide was 55.4 g: 55.3 mL: 25 mL: 200 mL.

[0017] Using triethylamine as an acid-binding agent, and controlling the molar ratio of intermediate 1 to chlorooctadecane at 1:1.05-1.1, the -NH- group of intermediate 1 undergoes a nucleophilic substitution reaction with the -Cl group of chlorooctadecane. The reaction process is shown below:

[0018]

[0019] S3. Under nitrogen protection, intermediate 2, maleic anhydride, DMAP (4-dimethylaminopyridine), and dimethyl sulfoxide were added to a three-necked flask. The mixture was stirred and heated to 50°C, and the reaction was maintained at this temperature for 12 hours. After the reaction was completed, the precipitate was removed by filtration. The filtrate was washed with saturated brine, dried rapidly with anhydrous magnesium sulfate, concentrated, and purified by column chromatography (the eluent was a mixed solution of methanol, ethyl acetate, and petroleum ether, with a volume ratio of 1:1:7). The mixture was then distilled under reduced pressure to obtain intermediate 3. The ratio of intermediate 2, maleic anhydride, DMAP, and dimethyl sulfoxide was 62 g: 11.6 g: 3.7 g: 240 mL.

[0020] Under the catalysis of DMAP, and with the molar ratio of intermediate 2 to maleic anhydride controlled at 1:1.1-1.2, intermediate 2 undergoes an esterification reaction with maleic anhydride, as shown in the following process:

[0021]

[0022] S4. Add nano-silica, glass fiber, intermediate 3, and DMF (N,N-dimethylformamide) to a dry four-necked flask and mix well. Then, slowly add concentrated sulfuric acid while stirring. After the addition is complete, stir and heat to 110°C, and keep the temperature for 3 hours. After the reaction is complete, cool to room temperature, filter, and wash with deionized water until the filtrate is neutral. Finally, take the filter residue and dry it at 110°C for 24 hours to obtain the auxiliary agent. The ratio of nano-silica, glass fiber, intermediate 3, concentrated sulfuric acid, and DMF is 20g:20g:5g:0.15g:200mL.

[0023] Under concentrated sulfuric acid and heating conditions, the hydroxyl groups on the surface of nano-silica and glass fiber can undergo esterification with the carboxyl groups on intermediate 3, thereby preparing the additive.

[0024] Nano-silica in the additives, as a high-performance filler, can significantly improve the mechanical strength and wear resistance of the cable sheath layer. Its small particle size and high specific surface area enable it to play a good reinforcing role in the cable sheath layer. Glass fiber in the additives, as a reinforcing material, can significantly improve the mechanical strength and toughness of the cable sheath layer. This invention grafts long carbon chains, fluoroalkyl chains, and carbon-carbon double bonds onto the surface of nano-silica and glass fiber through an esterification reaction. These organic media increase the spatial resistance to agglomeration between nano-silica particles and glass fiber particles, thereby improving the dispersibility of nano-silica and glass fiber and fully exerting its role in improving the mechanical strength of the cable sheath layer. The long carbon chains in the additives can insert between the macromolecular chains of the matrix resin, and can also play a role in improving the mechanical properties of the sheath layer, such as impact resistance and tensile strength. Furthermore, since the surface of the additive also contains carbon-carbon double bonds, it can chemically react with the carbon-carbon double bonds in the coupling agent under the action of the crosslinking agent, and it can also chemically react with the unreacted carbon-carbon double bonds at the end of the matrix resin. Therefore, the dispersion of the additive in the sheath layer of the present invention is further improved, and the mechanical strength of the sheath layer is more stable and excellent.

[0025] The abundant fluorine in the additives enhances the hydrophobicity of the sheath layer surface, thereby preventing corrosive substances in the air from penetrating the sheath layer and improving its corrosion resistance. Furthermore, the fluoroalkyl chains of this invention have fewer than 8 carbon atoms, thus eliminating bioaccumulation and posing no potential environmental hazard. In addition, cross-linking occurs between the additives, coupling agents, and matrix resin, forming a dense hybrid network structure, which further inhibits the corrosion of the sheath layer by corrosive substances.

[0026] Furthermore, the filler is a mixture of magnesium hydroxide, aluminum hydroxide, and mica powder in a mass ratio of 1:1:2.

[0027] Magnesium hydroxide and aluminum hydroxide release bound water upon thermal decomposition, absorbing a large amount of heat, lowering the surface temperature of the material, inhibiting polymer decomposition, and cooling the generated flammable gases, thus achieving flame retardant and smoke-suppressing effects. Mica powder possesses high fire resistance and good insulation properties; therefore, adding mica powder as a filler to the cable sheath layer enables the cable to maintain its electrical insulation performance and safe operation under high-temperature environments such as fires, and prevents the spread of fire. Furthermore, the addition of mica powder can significantly improve the tensile strength and abrasion resistance of the cable sheath layer, enhancing the cable's mechanical properties and ensuring its stability in harsh environments. The combined use of magnesium hydroxide, aluminum hydroxide, and mica powder significantly improves the flame retardant and smoke-suppressing performance of the cable sheath layer, exhibiting a good synergistic effect.

[0028] Furthermore, the pigment is one or more of Pigment Red 254, Phthalocyanine Red, Azo Orange, Azo Yellow, Phthalocyanine Blue, Phthalocyanine Green, and Carbon Black.

[0029] Furthermore, the coupling agent is one or more of vinyltrimethoxysilane, vinyltriethoxysilane, and 3-(methacryloyloxy)propyltrimethoxysilane.

[0030] The coupling agents used in this invention are all carbon-carbon double bonds. The silanol groups generated after hydrolysis can chemically react with the hydroxyl groups on the filler surface to form stable chemical bonds. The formation of these new chemical bonds reduces the surface energy of the filler, stabilizing it. Simultaneously, the organic medium on the filler surface increases the spatial resistance to particle aggregation, thus improving the filler's dispersibility and enabling it to fully exert its flame-retardant and smoke-suppressing effects. Furthermore, the coupling agents also introduce carbon-carbon double bonds into the filler surface. These carbon-carbon double-bond-containing fillers can then chemically interact with additives and the matrix resin to form a dense cross-linked network structure, improving both the flame-retardant stability and corrosion resistance of the sheath layer.

[0031] Furthermore, the lubricant is one or more of paraffin wax, polyethylene wax, stearic acid, sodium stearate, magnesium stearate, zinc stearate, butyl stearate, and ethylene bis-stearamide.

[0032] Furthermore, the antioxidant is one or more of antioxidant 2246, antioxidant 1010, antioxidant 1076, antioxidant DLTDP, and antioxidant 168.

[0033] Furthermore, the ultraviolet absorber is one or more of ultraviolet absorber UV-531, ultraviolet absorber UV-9, light stabilizer AM-101, light stabilizer GW-540, and light stabilizer 744.

[0034] Furthermore, the crosslinking agent is one or more of benzoyl peroxide, dicumyl peroxide, and triallyl isocyanurate.

[0035] A method for manufacturing a high-strength corrosion-resistant cable includes the following steps:

[0036] A shielding layer is wrapped around the conductor core, an insulation layer is extruded over the shielding layer, an inner sheath is extruded over the insulation layer, and finally a sheath layer is extruded over the outer side of the inner sheath to obtain a high-strength corrosion-resistant cable.

[0037] The beneficial effects of this invention are as follows: The additives of this invention contain nano-silica, glass fiber, long carbon chains and abundant fluorine elements. Furthermore, there is a dense hybrid cross-linking network between the additives, the matrix resin, and the fillers (a mixture of magnesium hydroxide, aluminum hydroxide and mica powder) treated with coupling agents. Therefore, the additives and fillers are highly dispersed and stably present in the sheath layer, and can fully exert their functions. As a result, the sheath layer of this invention has stable and excellent corrosion resistance, mechanical strength and flame retardant and smoke-suppressing effects, and has broad application prospects. Detailed Implementation

[0038] 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.

[0039] Example 1: Preparation of the auxiliary agent, the specific steps are as follows:

[0040] S1. Replace the air in a dry 500mL three-necked flask with nitrogen, then add 44.6mL of 1H,1H-undecylhexylamine, 16mL of epoxybutene, and 250mL of chloroform in sequence. After stirring thoroughly, heat to 65℃ and maintain the temperature for 6h. After the reaction is complete, cool to room temperature first, then distill under reduced pressure and purify by column chromatography (using a mixed solvent of chloroform and acetone as the eluent, with a volume ratio of 19:1). Distill under reduced pressure to obtain intermediate 1.

[0041] S2. Under nitrogen protection, 55.4 g of intermediate 1, 25 mL of triethylamine and 200 mL of dimethyl sulfoxide were added to a dry 500 mL three-necked flask. After stirring and dissolving, 55.3 mL of chlorooctadecane was slowly added. After the addition was complete, the temperature was raised to 80 °C and the reaction was stirred for 3 h. After the reaction was completed, the mixture was cooled to room temperature and then purified by vacuum distillation and column chromatography (the eluent was a mixed solvent of benzene and chloroform, with a volume ratio of 1:1). Vacuum distillation was then performed to obtain intermediate 2.

[0042] S3. Under nitrogen protection, add 62g of intermediate 2, 11.6g of maleic anhydride, 3.7g of DMAP and 240mL of dimethyl sulfoxide to a 500mL three-necked flask. Stir and heat to 50℃, and keep the reaction at this temperature for 12h. After the reaction is complete, filter to remove the precipitate. Wash the filtrate with saturated brine, dry it quickly with anhydrous magnesium sulfate, concentrate it, and purify it by column chromatography (the eluent is a mixed solution of methanol, ethyl acetate and petroleum ether, with a volume ratio of methanol, ethyl acetate and petroleum ether of 1:1:7). Distill under reduced pressure to obtain intermediate 3.

[0043] S4. Add 20g of nano-silica, 20g of glass fiber, 5g of intermediate 3 and 200mL of DMF to a 500mL dry four-necked flask and mix well. Then, while stirring, slowly add 0.15g of concentrated sulfuric acid. After the addition is complete, stir and heat to 110℃ and keep the temperature for 3h. After the reaction is complete, cool to room temperature, filter, and wash with deionized water until the filtrate is neutral. Finally, take the filter residue and dry it at 110℃ for 24h to obtain the auxiliary agent.

[0044] Example 2: Preparation of the sheath layer, the specific steps are as follows:

[0045] Weigh out 15 parts by weight of ethylene-vinyl acetate copolymer, 10 parts by weight of ethylene-acrylate copolymer, 6 parts by weight of polyvinyl chloride resin, 20 parts by weight of the additives prepared in Example 1, 5 parts by weight of magnesium hydroxide, 5 parts by weight of aluminum hydroxide, 10 parts by weight of mica powder, 2 parts by weight of pigment red 254, 1 part by weight of 3-(methacryloyloxy)propyltrimethoxysilane, 1 part by weight of paraffin wax, 0.5 parts by weight of antioxidant 2246, 0.5 parts by weight of ultraviolet absorber UV-531, and 0.01 parts by weight of benzoyl peroxide, mix them evenly, and then put them into a twin-screw extruder for extrusion granulation, and then extrude them into a sheath layer.

[0046] Example 3: Preparation of the sheath layer, the specific steps are as follows:

[0047] Weigh out 20 parts by weight of ethylene-vinyl acetate copolymer, 13 parts by weight of ethylene-acrylate copolymer, 10 parts by weight of polyvinyl chloride resin, 28 parts by weight of the additives prepared in Example 1, 7 parts by weight of magnesium hydroxide, 7 parts by weight of aluminum hydroxide, 14 parts by weight of mica powder, 1.5 parts by weight of phthalocyanine red, 1 part by weight of carbon black, 2 parts by weight of vinyltrimethoxysilane, 1 part by weight of zinc stearate, 1 part by weight of butyl stearate, 0.8 parts by weight of antioxidant 1010, 0.2 parts by weight of antioxidant 168, 0.5 parts by weight of ultraviolet absorber UV-9, 0.5 parts by weight of light stabilizer AM-101, and 0.08 parts by weight of dicumyl peroxide, mix them evenly, and then put them into a twin-screw extruder for extrusion granulation, and then extruded into a sheath layer.

[0048] Example 4: Preparation of the sheath layer, the specific steps are as follows:

[0049] Weigh out 25 parts by weight of ethylene-vinyl acetate copolymer, 15 parts by weight of ethylene-acrylate copolymer, 12 parts by weight of polyvinyl chloride resin, 30 parts by weight of the additives prepared in Example 1, 7.5 parts by weight of magnesium hydroxide, 7.5 parts by weight of aluminum hydroxide, 15 parts by weight of mica powder, 2 parts by weight of azo orange, 3 parts by weight of azo yellow, 1 part by weight of vinyltrimethoxysilane, 2 parts by weight of vinyltriethoxysilane, 1 part by weight of polyethylene wax, 1 part by weight of magnesium stearate, 1 part by weight of ethylene bis-stearamide, 0.8 parts by weight of antioxidant 1076, 0.1 parts by weight of antioxidant DLTDP, 0.1 parts by weight of antioxidant 168, 0.8 parts by weight of UV absorber UV-531, 0.1 parts by weight of light stabilizer GW-540, 0.1 parts by weight of light stabilizer 744, and 0.1 parts by weight of triallyl isocyanurate and mix them evenly. Then, put them into a twin-screw extruder for extrusion granulation and then extrusion molding into a sheath layer.

[0050] Example 5: Preparation of the sheath layer, the specific steps are as follows:

[0051] The remaining steps remain unchanged, except that the additives in Example 2 are replaced with 10 parts of untreated nano-silica and 10 parts of untreated glass fiber to prepare the sheath layer.

[0052] Example 6: Preparation of the sheath layer, the specific steps are as follows:

[0053] The remaining steps remain unchanged, except that the additives in Example 2 are replaced with 10 parts of untreated nano-silica and 10 parts of untreated glass fiber, and the coupling agent is replaced with 3-aminopropyltrimethoxysilane, to prepare the sheath layer.

[0054] Example 7: Preparation of a cable, the specific steps are as follows:

[0055] A shielding layer composed of polyethylene as the base material and carbon black is wrapped around the conductor core formed by twisting copper wires together. Then, a butyl rubber insulation layer is extruded over the shielding layer. Next, a polyvinyl chloride inner sheath is extruded over the insulation layer. Finally, the sheath layer prepared in Example 2 is extruded over the outer side of the inner sheath to obtain the cable.

[0056] Example 8: Preparation of a cable, the specific steps are as follows:

[0057] A shielding layer composed of polyethylene as the base material and carbon black is wrapped around the conductor core formed by twisting copper wires together. Then, a cross-linked polyethylene insulation layer is extruded over the shielding layer. Next, a polyethylene inner sheath is extruded over the insulation layer. Finally, the sheath layer prepared in Example 3 is extruded over the outer side of the inner sheath to obtain the cable.

[0058] Example 9: Preparation of a cable, the specific steps are as follows:

[0059] A shielding layer composed of polyethylene as the base material and carbon black is wrapped around the conductor core formed by twisting copper wires together. Then, a polytetrafluoroethylene propylene insulation layer is extruded over the shielding layer. Next, a cross-linked polyethylene inner sheath is extruded over the insulation layer. Finally, the sheath layer prepared in Example 4 is extruded over the outer side of the inner sheath to obtain the cable.

[0060] Comparative Example 1: The cable was prepared using the following steps:

[0061] The remaining steps remain unchanged, except that the sheath layer in Example 7 is replaced with the sheath layer prepared in Example 5, thereby preparing the cable.

[0062] Comparative Example 2: The cable was prepared using the following steps:

[0063] The remaining steps remain unchanged, except that the sheath layer in Example 7 is replaced with the sheath layer prepared in Example 6, thereby preparing the cable.

[0064] Performance testing

[0065] Flame retardancy test: The limiting oxygen index of the cables of Examples 7-9 and Comparative Examples 1-2 was determined according to the method of GB / T 2406.2-2009 "Determination of Combustion Behavior by Oxygen Index Method for Plastics".

[0066] Tensile strength test: The tensile strength of the cables prepared in Examples 7-9 and Comparative Examples 1-2 was determined according to the test methods specified in GB / T 2951.11-2008 "General Test Methods for Insulation and Sheath Materials of Cables and Optical Cables". The cables prepared in Examples 7-9 and Comparative Examples 1-2 were immersed in 25℃, 25wt% hydrochloric acid solution for 30 days and the tensile strength was tested again.

[0067] Corrosion resistance test: The cables prepared in Examples 7-9 and Comparative Examples 1-2 were immersed in 25 wt% hydrochloric acid solution, 25 wt% sodium hydroxide solution, 25 wt% sodium chloride solution and aqueous solution under the same conditions for 200 h, and then removed to observe the surface corrosion.

[0068] The test results are shown in the table below:

[0069]

[0070] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A high-strength corrosion-resistant cable, comprising, from the inside out, a conductor core, a shielding layer, an insulation layer, an inner sheath, and a sheath layer, characterized in that, The sheath layer is prepared by the following steps: 15-25 parts by weight of ethylene-vinyl acetate copolymer, 10-15 parts by weight of ethylene-acrylate copolymer, 6-12 parts by weight of polyvinyl chloride resin, 20-30 parts by weight of additives, 20-30 parts by weight of filler, 2-5 parts by weight of pigment, 1-3 parts by weight of coupling agent, 1-3 parts by weight of lubricant, 0.5-1 parts by weight of antioxidant, 0.5-1 parts by weight of ultraviolet absorber, and 0.01-0.1 parts by weight of crosslinking agent are weighed and mixed evenly, then put into a twin-screw extruder for extrusion granulation, and then extruded into a sheath layer; The auxiliary agent is prepared by the following steps: S1. After purging the air in the flask with nitrogen, add 1H,1H-undecanohexylamine, epoxide butene, and chloroform. Stir and heat to 65℃ for 6 hours. Cool, distill under reduced pressure, purify by column chromatography, and distill under reduced pressure to obtain intermediate 1. The ratio of 1H,1H-undecanohexylamine, epoxide butene, and chloroform is 44.6mL:16mL:250mL. S2. Under nitrogen protection, intermediate 1, triethylamine, and dimethyl sulfoxide were added to a flask, and chlorooctadecane was added with stirring. The mixture was heated to 80°C and reacted for 3 hours. After cooling, the mixture was purified by vacuum distillation, column chromatography, and vacuum distillation to obtain intermediate 2. The ratio of intermediate 1, chlorooctadecane, triethylamine, and dimethyl sulfoxide was 55.4 g: 55.3 mL: 25 mL: 200 mL. S3. Under nitrogen protection, add intermediate 2, maleic anhydride, DMAP and dimethyl sulfoxide to a flask, stir, react at 50°C for 12 h, filter, wash the filtrate with saturated brine, dry with anhydrous magnesium sulfate, concentrate, purify by column chromatography, and distill under reduced pressure to obtain intermediate 3; the ratio of intermediate 2, maleic anhydride, DMAP and dimethyl sulfoxide is 62 g: 11.6 g: 3.7 g: 240 mL; S4. Add nano-silica, glass fiber, intermediate 3 and DMF to a flask, stir and add concentrated sulfuric acid, react at 110℃ for 3h, cool, filter, wash with deionized water until the filtrate is neutral, take the filter residue and dry to obtain the auxiliary agent; the ratio of nano-silica, glass fiber, intermediate 3, concentrated sulfuric acid and DMF is 20g:20g:5g:0.15g:200mL.

2. The high-strength corrosion-resistant cable according to claim 1, characterized in that, The conductor core is made of copper wires twisted together; the shielding layer is composed of polyethylene as the base material and carbon black; the insulation layer is one or more of polytetrafluoroethylene insulation layer, cross-linked polyethylene insulation layer and butyl rubber insulation layer; the inner sheath is one or more of polyvinyl chloride inner sheath, polyethylene inner sheath and cross-linked polyethylene inner sheath.

3. The high-strength corrosion-resistant cable according to claim 1, characterized in that, The filler is a mixture of magnesium hydroxide, aluminum hydroxide, and mica powder in a mass ratio of 1:1:

2.

4. The high-strength corrosion-resistant cable according to claim 1, characterized in that, The pigment is one or more of Pigment Red 254, Phthalocyanine Red, Azo Orange, Azo Yellow, Phthalocyanine Blue, Phthalocyanine Green, and Carbon Black.

5. A high-strength corrosion-resistant cable according to claim 1, characterized in that, The coupling agent is one or more of vinyltrimethoxysilane, vinyltriethoxysilane, and 3-(methacryloyloxy)propyltrimethoxysilane.

6. A high-strength corrosion-resistant cable according to claim 1, characterized in that, The lubricant is one or more of paraffin wax, polyethylene wax, stearic acid, sodium stearate, magnesium stearate, zinc stearate, butyl stearate, and ethylene bis-stearamide.

7. A high-strength corrosion-resistant cable according to claim 1, characterized in that, The antioxidant is one or more of antioxidant 2246, antioxidant 1010, antioxidant 1076, antioxidant DLTDP, and antioxidant 168.

8. A high-strength corrosion-resistant cable according to claim 1, characterized in that, The ultraviolet absorber is one or more of the following: ultraviolet absorber UV-531, ultraviolet absorber UV-9, light stabilizer AM-101, light stabilizer GW-540, and light stabilizer 744.

9. A high-strength corrosion-resistant cable according to claim 1, characterized in that, The crosslinking agent is one or more of benzoyl peroxide, dicumyl peroxide, and triallyl isocyanurate.

10. The method for manufacturing a high-strength corrosion-resistant cable according to claim 1, characterized in that, Includes the following steps: A shielding layer is wrapped around the conductor core, an insulation layer is extruded over the shielding layer, an inner sheath is extruded over the insulation layer, and finally a sheath layer is extruded over the outer side of the inner sheath to obtain a high-strength corrosion-resistant cable.

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