Wear-resistant cable and preparation method thereof

Abstract

The invention provides a wear-resistant cable and a preparation method thereof, and the wear-resistant cable sequentially comprises an outer protection layer, an insulating layer and a conductor from outside to inside. The outer protective layer is prepared from the following raw materials in parts by weight: 8 to 14 parts of polypropylene, 25 to 35 parts of graphene oxide modified bacterial cellulose, 8 to 14 parts of silicon carbide whisker surface modified sillimanite, 4 to 10 parts of graphene aerogel loaded acetylene carbon black, 15 to 25 parts of polytetrafluoroethylene-ethylene copolymer and 6 to 10 parts of rare earth cerium doped nano calcium carbonate. 6-10 parts of a hyperbranched polyester compatilizer, 1-3 parts of a zinc dialkyl dithiophosphate rare earth complex, 1-3 parts of an ionic liquid-based lubricant and 3-5 parts of nano boron nitride. The outer protective layer of the cable has the comprehensive performance of good toughness, wear resistance, mechanical strength, aging resistance and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a wear-resistant cable and a preparation method thereof. Background Art

[0002] A cable is a device for transmitting electrical energy or signals, typically consisting of a conductor, insulation, and outer sheath. Cables are typically manufactured continuously, with finished cables typically wound onto reels. During the cable laying process, the cables are often pulled and dragged, placing high demands on their wear resistance. This wear resistance is intended to prevent the cable sheath from rapidly wearing out due to frequent friction, effectively avoiding exposure of the internal conductors and the potential risk of short circuits.

[0003] The outer layer of the cable is generally made of polypropylene material. Polypropylene is a cheap, lightweight and non-toxic general-purpose plastic. However, it has disadvantages such as high brittleness at low temperatures, low mechanical strength and hardness, large molding shrinkage, poor toughness, poor wear resistance, easy aging and poor heat resistance, which limit the application of polypropylene cable outer layers. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides a wear-resistant cable and a preparation method thereof.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present application discloses a wear-resistant cable, comprising, from the outside to the inside, an outer sheath, an insulating layer and a conductor. The outer sheath comprises, in parts by weight, the following raw materials: 8-14 parts of polypropylene, 25-35 parts of graphene oxide-modified bacterial cellulose, 8-14 parts of sillimanite surface-modified with silicon carbide whiskers, 4-10 parts of graphene aerogel-loaded acetylene black, 15-25 parts of polytetrafluoroethylene-ethylene copolymer, 6-10 parts of rare earth cerium-doped nano-calcium carbonate, 6-10 parts of a hyperbranched polyester compatibilizer, 1-3 parts of a zinc dialkyl dithiophosphate rare earth complex, 1-3 parts of an ionic liquid-based lubricant and 3-5 parts of nano-boron nitride.

[0007] Preferably, the components of the outer protective layer include the following raw materials in parts by weight: 10 parts of polypropylene, 30 parts of graphene oxide modified bacterial cellulose, 10 parts of silicon carbide whisker surface modified sillimanite, 6 parts of graphene aerogel loaded acetylene black, 20 parts of polytetrafluoroethylene-ethylene copolymer, 8 parts of rare earth cerium doped nano-calcium carbonate, 8 parts of hyperbranched polyester compatibilizer, 2 parts of dialkyl dithiophosphate zinc rare earth complex, 2 parts of ionic liquid-based lubricant and 4 parts of nano-boron nitride.

[0008] Preferably, the preparation method of graphene oxide modified bacterial cellulose is as follows:

[0009] a1. Ferment Acetobacter xylinum in a 5% glucose medium at 30°C for 7 days, then boil in a 5% NaOH solution for 1 hour to remove the bacteria, and freeze-dry to obtain bacterial cellulose aerogel;

[0010] a2. Graphene was mixed with 98% concentrated sulfuric acid and sodium nitrate, and potassium permanganate was added for oxidation. After reduction with hydrogen peroxide, ultrasonic exfoliation was performed at 600 W for 2 h to obtain a 3 mg / mL graphene oxide suspension.

[0011] a3. Immerse the bacterial cellulose aerogel in a graphene oxide suspension, add 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide in a molar ratio of 1:1, stir at 60° C. for 24 h, and vacuum dry at 60° C. for 12 h to obtain the aerogel.

[0012] Preferably, the preparation method of silicon carbide whisker surface-modified sillimanite is as follows:

[0013] b1, 5 μm sillimanite was etched with 15% hydrofluoric acid for 1.5 h, washed with water and dried;

[0014] b2. Take trichloromethylsilane, introduce 500 mL / min of hydrogen, and deposit at 750°C for 1.5 hours to make the silicon carbide whisker loading reach 18%. Then treat with 2% fluorosilane ethanol solution at 80°C for 3 hours to obtain the product.

[0015] Preferably, the preparation method of rare earth cerium doped nano calcium carbonate is as follows:

[0016] c1, 0.5 mol / L calcium nitrate and Ce 3+ To a 10% cerium nitrate mixture, add 0.6 mol / L ammonium carbonate dropwise at 80°C until the pH reaches 9-10, and stir for 2 hours to form a precipitate;

[0017] c2. After the precipitate is washed with water and alcohol, stearic acid with a concentration of 6% by mass of calcium carbonate is added and modified at 80°C for 1.5h. The particle size is controlled to be 40nm.

[0018] Preferably, the preparation method of the alkyl dithiophosphate zinc rare earth complex is as follows:

[0019] d1. Dinonylamine and phosphorus pentasulfide were reacted at a molar ratio of 2:1 at 120°C for 3 h, zinc oxide was added at a molar ratio of 1:1.1, and the mixture was neutralized at 80°C to obtain zinc dialkyl dithiophosphate;

[0020] d2. Dissolve zinc dialkyl dithiophosphate and neodymium nitrate in ethanol at a molar ratio of 2.8:1, add triethylamine, stir at 60°C for 5 hours, precipitate, wash, and dry to obtain the product.

[0021] The present application also discloses a method for preparing a wear-resistant cable, comprising the following steps:

[0022] S1. Take graphene oxide modified bacterial cellulose, silicon carbide whisker surface modified sillimanite, and rare earth cerium doped nano-calcium carbonate, and vacuum dry them at 80°C for 4 h to remove moisture;

[0023] S2. Graphene aerogel loaded with acetylene black, nano-boron nitride, and 20% of a hyperbranched polyester compatibilizer were mixed at a high speed of 1500 rpm for 10 minutes to improve dispersibility;

[0024] S3, first add polypropylene, polytetrafluoroethylene-ethylene copolymer, and ionic liquid-based lubricant into a twin-screw extruder for melt extrusion, then add the mixture obtained in step S1 and the mixture obtained in step S2 in sequence, and then add the zinc dialkyl dithiophosphate rare earth complex and the remaining hyperbranched polyester compatibilizer, and blend for 8-10 minutes;

[0025] S4. Adjust the die head temperature of the twin-screw extruder to 190-200°C and the melt pressure to 10-12 MPa, cool the cable through a vacuum sizing sleeve, control the pulling speed to 5-8 m / min, and form an outer sheath on the outside of the conductor wrapped by the insulation layer to obtain a wear-resistant cable.

[0026] Preferably, the water cooling temperature of the vacuum sizing sleeve is 20°C.

[0027] The beneficial effects of the present invention are:

[0028] The nanofiber network of bacterial cellulose has high toughness. The oxygen-containing functional groups (hydroxyl and carboxyl) of graphene oxide can form hydrogen bonds with bacterial cellulose to enhance interfacial bonding. The lamellar structure of graphene oxide can inhibit the crystallization of polypropylene and reduce molding shrinkage, effectively solving the problems of poor toughness and large shrinkage of polypropylene.

[0029] Sillimanite provides a rigid framework, while SiC whiskers significantly enhance wear resistance. The whisker aspect ratio enhances mechanical strength, and surface modification improves compatibility with the substrate. The three-dimensional network structure of graphene aerogel adsorbs free radicals, while acetylene black enhances aging resistance and electrical conductivity. The composite system combines antistatic and thermal conductivity, slowing polypropylene aging and reducing frictional heat generation.

[0030] The CF bond of the polytetrafluoroethylene segment imparts excellent weather resistance, the ethylene segment improves compatibility with polypropylene, and the fluorinated segment maintains flexibility at low temperatures and reduces the brittle temperature. 3+ It can absorb ultraviolet light and improve aging resistance, calcium carbonate enhances hardness, and rare earth doping improves the interface between filler and matrix.

[0031] Hyperbranched polyester compatibilizers can intercalate at the interface between polypropylene and polar fillers, enhancing adhesion through hydrogen bonding. The rare earth ions in neodymium nitrate synergize with zinc dialkyldithiophosphate to provide both antioxidant and wear resistance, decomposing peroxides and forming a lubricating film on the friction surface. Ionic liquid-based lubricants form an atomic-level lubricating film during processing, reducing melt viscosity, improving interfacial compatibility, and addressing the high-temperature precipitation issues of traditional lubricants. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Example 1:

[0034] This embodiment discloses a wear-resistant cable, comprising, from the outside to the inside, an outer sheath, an insulating layer, and a conductor. The outer sheath comprises, in parts by weight, the following raw materials: 8 parts of polypropylene, 25 parts of graphene oxide-modified bacterial cellulose, 8 parts of sillimanite surface-modified with silicon carbide whiskers, 4 parts of graphene aerogel-loaded acetylene black, 15 parts of polytetrafluoroethylene-ethylene copolymer, 6 parts of rare earth cerium-doped nano-calcium carbonate, 6 parts of a hyperbranched polyester compatibilizer, 1 part of a zinc dialkyl dithiophosphate rare earth complex, 1 part of an ionic liquid-based lubricant, and 3 parts of nano-boron nitride.

[0035] The preparation method of graphene oxide modified bacterial cellulose is as follows:

[0036] a1. Ferment Acetobacter xylinum in a 5% glucose medium at 30°C for 7 days, then boil in a 5% NaOH solution for 1 hour to remove the bacteria, and freeze-dry to obtain bacterial cellulose aerogel;

[0037] a2. Graphene was mixed with 98% concentrated sulfuric acid and sodium nitrate, oxidized with potassium permanganate, reduced with hydrogen peroxide, and then ultrasonically exfoliated at 600 W for 2 h to obtain a 3 mg / mL graphene oxide suspension;

[0038] a3. Immerse the bacterial cellulose aerogel in a graphene oxide suspension, add 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide in a molar ratio of 1:1, stir at 60° C. for 24 h, and vacuum dry at 60° C. for 12 h to obtain the aerogel.

[0039] The preparation method of sillimanite modified with silicon carbide whiskers is as follows:

[0040] b1, 5 μm sillimanite was etched with 15% hydrofluoric acid for 1.5 h, washed with water and dried;

[0041] b2. Take trichloromethylsilane, introduce 500 mL / min of hydrogen, and deposit at 750°C for 1.5 hours to make the silicon carbide whisker loading reach 18%. Then treat with 2% fluorosilane ethanol solution at 80°C for 3 hours to obtain the product.

[0042] The preparation method of rare earth cerium doped nano calcium carbonate is as follows:

[0043] c1, 0.5 mol / L calcium nitrate and Ce 3+ To a 10% cerium nitrate mixture, add 0.6 mol / L ammonium carbonate dropwise at 80°C until the pH reaches 9-10, and stir for 2 hours to form a precipitate;

[0044] c2. After the precipitate is washed with water and alcohol, stearic acid with a concentration of 6% by mass of calcium carbonate is added and modified at 80°C for 1.5h. The particle size is controlled to be 40nm.

[0045] The preparation method of zinc dialkyl dithiophosphate rare earth complex is as follows:

[0046] d1. Dinonylamine and phosphorus pentasulfide were reacted at a molar ratio of 2:1 at 120°C for 3 h, zinc oxide was added at a molar ratio of 1:1.1, and the mixture was neutralized at 80°C to obtain zinc dialkyl dithiophosphate;

[0047] d2. Dissolve zinc dialkyl dithiophosphate and neodymium nitrate in ethanol at a molar ratio of 2.8:1, add triethylamine, stir at 60°C for 5 hours, precipitate, wash, and dry to obtain the product.

[0048] This embodiment also discloses a method for preparing a wear-resistant cable, which comprises the following steps:

[0049] S1. Take graphene oxide modified bacterial cellulose, silicon carbide whisker surface modified sillimanite, and rare earth cerium doped nano-calcium carbonate, and vacuum dry them at 80°C for 4 h to remove moisture;

[0050] S2. Graphene aerogel loaded with acetylene black, nano-boron nitride, and 20% of a hyperbranched polyester compatibilizer were mixed at a high speed of 1500 rpm for 10 minutes to improve dispersibility;

[0051] S3, first add polypropylene, polytetrafluoroethylene-ethylene copolymer, and ionic liquid-based lubricant into a twin-screw extruder for melt extrusion, then add the mixture obtained in step S1 and the mixture obtained in step S2 in sequence, and then add the zinc dialkyl dithiophosphate rare earth complex and the remaining hyperbranched polyester compatibilizer, and blend for 8-10 minutes;

[0052] S4. Adjust the die head temperature of the twin-screw extruder to 190-200°C and the melt pressure to 10-12 MPa, cool the cable through a vacuum sizing sleeve with a water cooling temperature of 20°C, control the traction speed to 5-8 m / min, and form an outer sheath on the outside of the conductor wrapped by the insulation layer to obtain a wear-resistant cable.

[0053] Example 2:

[0054] This embodiment discloses a wear-resistant cable, comprising, from the outside to the inside, an outer sheath, an insulating layer, and a conductor. The only difference between the embodiment and the first embodiment is that, in parts by weight, the components of the outer sheath include the following raw materials: 14 parts of polypropylene, 35 parts of graphene oxide-modified bacterial cellulose, 14 parts of silicon carbide whisker surface-modified sillimanite, 10 parts of graphene aerogel-loaded acetylene black, 25 parts of polytetrafluoroethylene-ethylene copolymer, 10 parts of rare earth cerium-doped nano-calcium carbonate, 10 parts of a hyperbranched polyester compatibilizer, 3 parts of a zinc dialkyl dithiophosphate rare earth complex, 3 parts of an ionic liquid-based lubricant, and 5 parts of nano-boron nitride.

[0055] Example 3:

[0056] This embodiment discloses a wear-resistant cable, comprising, from the outside to the inside, an outer sheath, an insulating layer, and a conductor. The only difference between the embodiment and the first embodiment is that, in parts by weight, the components of the outer sheath include the following raw materials: 10 parts of polypropylene, 30 parts of graphene oxide-modified bacterial cellulose, 10 parts of sillimanite surface-modified with silicon carbide whiskers, 6 parts of graphene aerogel-loaded acetylene black, 20 parts of polytetrafluoroethylene-ethylene copolymer, 8 parts of rare earth cerium-doped nano-calcium carbonate, 8 parts of a hyperbranched polyester compatibilizer, 2 parts of a zinc dialkyl dithiophosphate rare earth complex, 2 parts of an ionic liquid-based lubricant, and 4 parts of nano-boron nitride.

[0057] Comparative Example 1:

[0058] A wear-resistant cable, the difference between the cable and Example 3 is that: graphene oxide modified bacterial cellulose is not added.

[0059] Comparative Example 2:

[0060] A wear-resistant cable, the difference between the cable and Example 3 is that the sillimanite surface modified by silicon carbide whiskers is not added.

[0061] Comparative Example 3:

[0062] A wear-resistant cable, the difference between the cable and Example 3 is that the graphene aerogel-loaded acetylene black is not added.

[0063] Comparative Example 4:

[0064] A wear-resistant cable, the difference between the cable and embodiment 3 is that no polytetrafluoroethylene-ethylene copolymer is added.

[0065] Comparative Example 5:

[0066] A wear-resistant cable, the difference between the cable and embodiment 3 is that rare earth cerium doped nano calcium carbonate is not added.

[0067] Comparative Example 6:

[0068] A wear-resistant cable, wherein the difference between the cable and Example 3 is that no hyperbranched polyester compatibilizer is added.

[0069] Comparative Example 7:

[0070] A wear-resistant cable, the difference between the cable and Example 3 is that no zinc dialkyl dithiophosphate rare earth complex is added.

[0071] Comparative Example 8:

[0072] A wear-resistant cable, the difference between the cable and Example 3 is that no ionic liquid-based lubricant is added.

[0073] Comparative Example 9:

[0074] A wear-resistant cable, the difference between the cable and embodiment 3 is that nano boron nitride is not added.

[0075] The low-temperature brittle temperature, Akron abrasion (friction resistance index), 23°C tensile strength and heat aging (120°C x 2000h) properties of the cables obtained in Examples 1-3 and Comparative Examples 1-9 were tested using the following methods:

[0076] Low temperature brittleness: GB / T 5454, -65℃ for 2h, impact test to observe cracks;

[0077] Akron wear: GB / T 1689, load 5N, stroke 40m;

[0078] Tensile properties: GB / T 1040.3, 23℃ and -40℃, tensile speed 50mm / min;

[0079] Heat aging: GB / T 7141, 120°C x 2000h, test strength retention;

[0080] The comprehensive performance of the cable was measured and the results are shown in Table 1.

[0081] Table 1 Performance parameters of the cables obtained in Examples 1-3 and Comparative Examples 1-9

[0082]

[0083]

[0084] From Table 1 we can see that:

[0085] The addition of graphene oxide-modified bacterial cellulose and polytetrafluoroethylene-ethylene copolymer has a great impact on the low-temperature brittle temperature of the cable. The addition of silicon carbide whisker surface-modified sillimanite and graphene aerogel-loaded acetylene black has the second smallest impact on the low-temperature brittle temperature of the cable.

[0086] The addition of sillimanite modified with silicon carbide whiskers, polytetrafluoroethylene-ethylene copolymer, and hyperbranched polyester compatibilizer has a significant impact on the wear resistance of the cable.

[0087] The addition of graphene oxide-modified bacterial cellulose and polytetrafluoroethylene-ethylene copolymer had no significant effect on the tensile strength of the cable. The addition of silicon carbide whisker surface-modified sillimanite and rare earth cerium-doped nano-calcium carbonate had the second least effect on the tensile strength of the cable.

[0088] The absence of graphene oxide-modified bacterial cellulose, graphene aerogel-loaded acetylene black and polytetrafluoroethylene-ethylene copolymer has a significant impact on the aging resistance of the cable. The absence of rare earth cerium-doped nano-calcium carbonate has the second least impact on the aging resistance of the cable.

[0089] Possible explanation: The bacterial cellulose nanofiber network possesses high toughness. The oxygen-containing functional groups (hydroxyl and carboxyl) of graphene oxide can form hydrogen bonds with bacterial cellulose, enhancing interfacial adhesion. The lamellar structure of graphene oxide inhibits polypropylene crystallization and reduces molding shrinkage, effectively addressing the problems of poor toughness and high shrinkage of polypropylene. Sillimanite provides a rigid skeleton, SiC whiskers significantly enhance wear resistance, the whisker aspect ratio enhances mechanical strength, and surface modification improves compatibility with the matrix. The three-dimensional network structure of graphene aerogel can adsorb free radicals, and acetylene black enhances aging resistance and electrical conductivity. The composite system has both antistatic and thermal conductivity, delaying polypropylene aging and reducing frictional heat generation. The C-H bonds of the polytetrafluoroethylene segments impart excellent weather resistance, the ethylene segments improve compatibility with polypropylene, and the fluorinated segments maintain flexibility at low temperatures, lowering the brittle temperature. Ce₃⁺ absorbs UV light, improving aging resistance. Calcium carbonate enhances hardness, and rare earth doping improves the filler-matrix interface. Hyperbranched polyester compatibilizers can be inserted into the interface between polypropylene and polar fillers, enhancing adhesion through hydrogen bonding. The rare earth ions in neodymium nitrate synergize with zinc dialkyldithiophosphate to provide both antioxidant and wear resistance, decomposing peroxides and forming a lubricating film on the friction surface.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A wear-resistant cable, comprising, from outside to inside, an outer sheath, an insulating layer and a conductor, characterized in that: The outer protective layer comprises the following raw materials in parts by weight: 8-14 parts of polypropylene, 25-35 parts of graphene oxide-modified bacterial cellulose, 8-14 parts of sillimanite surface-modified with silicon carbide whiskers, 4-10 parts of graphene aerogel-loaded acetylene black, 15-25 parts of polytetrafluoroethylene-ethylene copolymer, 6-10 parts of rare earth cerium-doped nano-calcium carbonate, 6-10 parts of hyperbranched polyester compatibilizer, 1-3 parts of zinc dialkyl dithiophosphate rare earth complex, 1-3 parts of ionic liquid-based lubricant and 3-5 parts of nano-boron nitride.

2. The wear-resistant cable according to claim 1, characterized in that The outer protective layer comprises the following raw materials in parts by weight: 10 parts of polypropylene, 30 parts of graphene oxide-modified bacterial cellulose, 10 parts of sillimanite surface-modified with silicon carbide whiskers, 6 parts of acetylene black loaded with graphene aerogel, 20 parts of polytetrafluoroethylene-ethylene copolymer, 8 parts of rare earth cerium-doped nano-calcium carbonate, 8 parts of hyperbranched polyester compatibilizer, 2 parts of zinc dialkyl dithiophosphate rare earth complex, 2 parts of ionic liquid-based lubricant and 4 parts of nano-boron nitride.

3. The wear-resistant cable according to claim 1 or 2, characterized in that: The preparation method of graphene oxide modified bacterial cellulose is as follows: a1. Ferment Acetobacter xylinum in a 5% glucose medium at 30°C for 7 days, then boil in a 5% NaOH solution for 1 hour to remove the bacteria, and freeze-dry to obtain bacterial cellulose aerogel; a2. Graphene was mixed with 98% concentrated sulfuric acid and sodium nitrate, oxidized with potassium permanganate, reduced with hydrogen peroxide, and then ultrasonically exfoliated at 600 W for 2 h to obtain a 3 mg / mL graphene oxide suspension; a3. Immerse the bacterial cellulose aerogel in a graphene oxide suspension, add 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide in a molar ratio of 1:1, stir at 60° C. for 24 h, and vacuum dry at 60° C. for 12 h to obtain the aerogel.

4. The wear-resistant cable according to claim 3, characterized in that The preparation method of sillimanite modified with silicon carbide whiskers is as follows: b1, 5 μm sillimanite was etched with 15% hydrofluoric acid for 1.5 h, washed with water and dried; b2. Take trichloromethylsilane, introduce 500 mL / min of hydrogen, and deposit at 750°C for 1.5 hours to make the silicon carbide whisker loading reach 18%. Then treat with 2% fluorosilane ethanol solution at 80°C for 3 hours to obtain the product.

5. The wear-resistant cable according to claim 4, characterized in that: The preparation method of rare earth cerium doped nano calcium carbonate is as follows: c1, 0.5 mol / L calcium nitrate and Ce 3+ To a 10% cerium nitrate mixture, add 0.6 mol / L ammonium carbonate dropwise at 80°C until the pH reaches 9-10, and stir for 2 hours to form a precipitate; c2. After the precipitate is washed with water and alcohol, stearic acid with a concentration of 6% by mass of calcium carbonate is added and modified at 80°C for 1.5h. The particle size is controlled to be 40nm.

6. The wear-resistant cable according to claim 5, characterized in that The preparation method of zinc dialkyl dithiophosphate rare earth complex is as follows: d1. Dinonylamine and phosphorus pentasulfide were reacted at a molar ratio of 2:1 at 120°C for 3 h, zinc oxide was added at a molar ratio of 1:1.1, and the mixture was neutralized at 80°C to obtain zinc dialkyl dithiophosphate; d2. Dissolve zinc dialkyl dithiophosphate and neodymium nitrate in ethanol at a molar ratio of 2.8:1, add triethylamine, stir at 60°C for 5 hours, precipitate, wash, and dry to obtain the product.

7. A method for preparing a wear-resistant cable according to any one of claims 1 to 6, characterized in that: The preparation method comprises the following steps: S1. Take graphene oxide modified bacterial cellulose, silicon carbide whisker surface modified sillimanite, and rare earth cerium doped nano-calcium carbonate, and vacuum dry them at 80°C for 4 h to remove moisture; S2. Graphene aerogel loaded with acetylene black, nano-boron nitride, and 20% of a hyperbranched polyester compatibilizer were mixed at a high speed of 1500 rpm for 10 minutes to improve dispersibility; S3, first add polypropylene, polytetrafluoroethylene-ethylene copolymer, and ionic liquid-based lubricant into a twin-screw extruder for melt extrusion, then add the mixture obtained in step S1 and the mixture obtained in step S2 in sequence, and then add the zinc dialkyl dithiophosphate rare earth complex and the remaining hyperbranched polyester compatibilizer, and blend for 8-10 minutes; S4. Adjust the die head temperature of the twin-screw extruder to 190-200°C and the melt pressure to 10-12 MPa, cool the cable through a vacuum sizing sleeve, control the pulling speed to 5-8 m / min, and form an outer sheath on the outside of the conductor wrapped by the insulation layer to obtain a wear-resistant cable.

8. The method for preparing the wear-resistant cable according to claim 7, characterized in that: The water cooling temperature of the vacuum sizing sleeve is 20℃.

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