Environment-friendly flame-retardant new energy charging pile cable

Abstract

The invention provides an environment-friendly flame-retardant new energy charging pile cable which comprises a conductor, an insulating layer, an inner sheath layer and an outer sheath layer. The insulating layer is prepared from 25 to 35 parts of hydrogenated styrene-butadiene block copolymer, 10 to 20 parts of borazine modified polybenzoxazine, 6 to 10 parts of antimony sulfide, 7 to 13 parts of MoS2 quantum dot-PI nanofiber, 5 to 10 parts of hydroxyapatite, 3 to 7 parts of copper hexacyanoferrate, 7 to 13 parts of PEEK grafted TiO2 nanoparticle, 4 to 8 parts of benzoxazine modified BN nanotube and 1 to 5 parts of silane modified melamine; the inner sheath layer comprises 35 to 40 parts of ethylene-ethyl acrylate copolymer, 8 to 12 parts of tungsten diselenide, 10 to 15 parts of aluminate modified ZB microcapsule, 6 to 10 parts of nano tantalum carbide, 10 to 15 parts of PLGA modified montmorillonite, 6 to 10 parts of BMI grafted carbon fiber and 2 to 6 parts of nano ZnO-Ag antibacterial agent; and the outer sheath layer comprises 35 to 45 parts of a PEEK-PTFE blend, 5 to 10 parts of niobium diselenide, 10 to 15 parts of modified nano clay, 4 to 8 parts of molybdenum ditelluride, 10 to 20 parts of zinc hydroxystannate, 3 to 7 parts of microencapsulated DCPD and 2 to 6 parts of a vulcanizing agent. The cable has the advantages of environmental protection, flame retardance, wear resistance, aging resistance and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to an environmentally friendly flame-retardant new energy charging pile cable. Background Art

[0002] New energy charging pile cables are key components connecting charging piles to electric vehicles, primarily used for power and control signal transmission. In new energy vehicle charging pile systems, power cables, serving as the bridge connecting the charging piles and electric vehicles, must not only withstand high current and high voltage transmission requirements but also maintain long-term stable performance in a variety of complex environmental conditions, particularly high temperatures.

[0003] Current cables for new energy charging stations generally suffer from insufficient environmental performance. Traditional cable formulations contain plasticizers such as phthalates, which can easily volatilize during use, posing potential risks to the environment and human health. Furthermore, flame retardant systems often rely on halogen compounds, which release toxic fumes when burned and fail to meet environmental standards. Furthermore, existing cables lack high-temperature and aging resistance, making them difficult to adapt to complex operating environments. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides an environmentally friendly flame-retardant new energy charging pile cable.

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

[0006] The present application discloses an environmentally friendly flame-retardant new energy charging pile cable, comprising a conductor, an insulating layer, an inner sheath layer and an outer sheath layer arranged in sequence from the inside to the outside. The components of the insulating layer include the following raw materials in parts by weight: 25-35 parts of hydrogenated styrene-butadiene block copolymer, 10-20 parts of borazane-modified polybenzoxazine, 6-10 parts of antimony sulfide, 7-13 parts of molybdenum disulfide quantum dots-polyimide nanofibers, 5-10 parts of hydroxyapatite, 3-7 parts of copper hexacyanoferrate, 7-13 parts of polyetheretherketone grafted titanium dioxide nanoparticles, 4-8 parts of benzoxazine-modified boron nitride nanotubes and 1-5 parts of silane-modified melamine; the components of the inner sheath layer include The raw materials are as follows in parts by weight: 35-40 parts of ethylene-ethyl acrylate copolymer, 8-12 parts of tungsten diselenide, 10-15 parts of aluminate-modified zinc borate microcapsules, 6-10 parts of nano-tantalum carbide, 10-15 parts of PLGA-modified montmorillonite, 6-10 parts of bismaleimide-grafted carbon fibers, and 2-6 parts of nano-ZnO-Ag antibacterial agents; the components of the outer sheath layer include the following raw materials in parts by weight: 35-45 parts of polyetheretherketone-polytetrafluoroethylene blend, 5-10 parts of niobium diselenide, 10-15 parts of carboxyl nitrile rubber-modified nanoclay, 4-8 parts of molybdenum ditelluride, 10-20 parts of zinc hydroxystannate, 3-7 parts of microencapsulated dicyclopentadiene, and 2-6 parts of a vulcanizing agent.

[0007] Preferably, in parts by weight: the components of the insulating layer include the following raw materials in parts by weight: 30 parts of hydrogenated styrene-butadiene block copolymer, 15 parts of borazane-modified polybenzoxazine, 8 parts of antimony sulfide, 10 parts of molybdenum disulfide quantum dots-polyimide nanofibers, 7 parts of hydroxyapatite, 5 parts of copper hexacyanoferrate, 10 parts of polyetheretherketone grafted titanium dioxide nanoparticles, 6 parts of benzoxazine-modified boron nitride nanotubes and 3 parts of silane-modified melamine; the components of the inner sheath layer include the following raw materials in parts by weight: ethylene-propylene The invention discloses a novel composite material comprising: 37 parts of ethyl acetate copolymer, 9 parts of tungsten diselenide, 13 parts of aluminate-modified zinc borate microcapsules, 7 parts of nano-tantalum carbide, 12 parts of PLGA-modified montmorillonite, 8 parts of bismaleimide grafted carbon fibers and 4 parts of nano-ZnO-Ag antibacterial agents; the components of the outer sheath layer include the following raw materials in parts by weight: 40 parts of polyetheretherketone-polytetrafluoroethylene blend, 8 parts of niobium diselenide, 12 parts of carboxyl nitrile rubber modified nanoclay, 6 parts of molybdenum ditelluride, 15 parts of hydroxy zinc stannate, 5 parts of microencapsulated dicyclopentadiene and 4 parts of vulcanizing agent.

[0008] Preferably, the preparation method of borazane-modified polybenzoxazine is as follows: 100 g of benzoxazine monomer, 10 mmol of triethylborazine, and 200 mL of toluene are taken, the benzoxazine monomer and toluene are mixed, stirred and dissolved at 80° C., triethylborazine is added dropwise, and the reaction is refluxed for 10 hours. The solvent is removed by distillation under reduced pressure, the product is washed with ethanol three times, and finally dried under vacuum conditions at 60° C. for 12 hours.

[0009] Preferably, the preparation method of molybdenum disulfide quantum dot-polyimide nanofibers is as follows: 10g of molybdenum disulfide powder is mixed with 20g of lithium chloride, ultrasonically treated in ether at 320W for 50h, centrifuged at high speed to obtain the supernatant, and precipitated with ethanol to obtain molybdenum disulfide quantum dot-polyimide nanofibers.

[0010] Preferably, the preparation method of aluminate-modified zinc borate microcapsules is as follows: 20 g of zinc borate is dispersed in 200 mL of deionized water, 40 g of polyurea formaldehyde prepolymer is added, the pH is adjusted to 4.5, and the mixture is stirred at 60° C. for 2 h to form microcapsules. Then, an aluminate coupling agent (3.2% by weight of the zinc borate) is added, and the mixture is refluxed in xylene at 80° C. for 3 h to obtain aluminate-modified zinc borate microcapsules.

[0011] Preferably, the preparation method of the polyetheretherketone-polytetrafluoroethylene blend is: take polyetheretherketone with a melt index of 10g / 10min and polytetrafluoroethylene micropowder with a particle size of 5.5μm in a mass ratio of 7:3, and use a twin-screw extruder to blend and granulate the mixture to obtain the polyetheretherketone-polytetrafluoroethylene blend.

[0012] Preferably, the extrusion granulation temperature of the twin-screw extruder is 380° C., and the screw length-to-diameter ratio is 30:1.

[0013] Preferably, the method for preparing the cable includes the following steps:

[0014] S1. Preheat the conductor to 80°C, and extrude the components of the insulation layer onto the conductor using a single-screw extruder at a temperature of 210-220°C and a speed of 70 r / min to form an insulation layer;

[0015] S2. The insulating layer is cooled with warm water at 20°C, and the components of the inner sheath layer are extruded by a twin-screw extruder at a temperature of 210-220°C and a speed of 130 r / min to form the inner sheath layer;

[0016] S3, the inner sheath layer is cooled by cold water at 5℃, and the components of the outer sheath layer are extruded by a reciprocating single screw extruder at a temperature of 360-400℃ and a speed of 40r / min to form the inner sheath layer, and then subjected to 1000mW / cm 2 After light curing for 30 seconds and winding, the environmentally friendly flame-retardant new energy charging pile cable is obtained;

[0017] Among them, the pulling speeds of the insulation layer, inner sheath layer and outer sheath layer are 15m / min, 10m / min and 8m / min respectively.

[0018] The beneficial effects of the present invention are:

[0019] The hydrogenated styrene-butadiene block copolymer serves as the matrix, offering excellent flexibility and weather resistance, meeting the bending requirements of charging pile cables. It is also halogen-free and environmentally friendly. Borazane-modified polybenzoxazine introduces a boron-nitrogen heterocycle, raising its thermal decomposition temperature to above 380°C and enhancing flame retardancy. Upon combustion, it forms a ceramic carbon layer, meeting flame retardancy requirements. The layered structure of antimony sulfide improves dielectric properties and reduces dielectric loss. It also synergizes with the flame retardant system to suppress combustion, meeting the high-frequency transmission requirements of charging piles. Molybdenum disulfide quantum dots enhance thermal conductivity, while polyimide nanofibers enhance mechanical strength. The two combine to form a dual-functional "thermal conductivity-mechanical" network, adapting to high-current heating scenarios in charging piles. Hydroxyapatite is a biocompatible material that releases water vapor to dilute combustible gases upon combustion. It is halogen-free and meets environmental and flame retardancy requirements. Copper hexacyanoferrate absorbs acidic gases (such as SO2) generated during cable operation, improving insulation stability and meeting the long-term reliable operation requirements of charging piles. Polyetheretherketone grafted with titanium dioxide nanoparticles improves high-temperature resistance. TiO2 shields UV rays, and the composite enhances weathering and aging resistance, making it suitable for outdoor charging station environments. Benzoxazine-modified boron nitride nanotubes offer high thermal conductivity, accelerating heat dissipation. Benzoxazine enhances interfacial bonding, creating an efficient heat dissipation channel and preventing overheating of charging station cables. Silane groups in silane-modified melamine react with hydrogenated styrene-butadiene block copolymer to form a water-resistant network, enhancing hydrolysis resistance.

[0020] The ethylene-ethyl acrylate copolymer matrix offers excellent thermal conductivity and chemical resistance, making it suitable as an intermediate sheath layer, encapsulating the insulation and providing a buffer. Tungsten diselenide layered nanomaterials increase thermal conductivity to 0.9 W / (m·K), accelerating heat dissipation from the insulation layer and preventing localized overheating. Aluminate-modified zinc borate microcapsules exhibit a "delayed-release" flame retardant mechanism, releasing the zinc borate flame retardant at high temperatures, enhancing the cable's flame retardancy under overload conditions. Nano-tantalum carbide's high hardness enhances the inner sheath's puncture resistance, preventing mechanical damage during installation and adapting to the complex environment of charging station sites. The biodegradable nature of PLGA imparts environmentally friendly properties to the inner sheath, while the layered structure of montmorillonite enhances barrier properties and inhibits the migration of small molecules. The high crosslink density of bismaleimide combined with the high strength of carbon fibers enhances the tensile strength of the inner sheath, resisting the mechanical stresses of cable drag. Nano-ZnO-Ag antimicrobial agents utilize the antimicrobial properties of silver ions to inhibit microbial growth.

[0021] The combination of high-strength polyetheretherketone (PEEK) and low-friction polytetrafluoroethylene (PTFE) imparts self-lubricating and wear-resistant properties to the outer sheath, making it suitable for outdoor drag and complex terrain. The carboxylated nitrile rubber elastomer improves interfacial compatibility between the clay and substrate, enhancing the outer sheath's tear resistance, while also providing a clay barrier that improves weather resistance. The layered structure of molybdenum ditelluride further reduces friction and offers strong resistance to UV aging, making it suitable for long-term outdoor UV radiation exposure in charging stations. Zinc hydroxystannate is a halogen-free flame retardant, ensuring environmental friendliness. DETAILED DESCRIPTION

[0022] 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.

[0023] Example 1:

[0024] This embodiment discloses an environmentally friendly flame-retardant new energy charging pile cable, including a conductor, an insulation layer, an inner sheath layer, and an outer sheath layer arranged in order from the inside to the outside, in parts by weight:

[0025] The components of the insulating layer include the following raw materials in parts by weight: 25 parts of hydrogenated styrene-butadiene block copolymer, 10 parts of borazane-modified polybenzoxazine, 6 parts of antimony sulfide, 7 parts of molybdenum disulfide quantum dot-polyimide nanofibers, 5 parts of hydroxyapatite, 3 parts of copper hexacyanoferrate, 7 parts of polyetheretherketone grafted titanium dioxide nanoparticles, 4 parts of benzoxazine-modified boron nitride nanotubes and 1 part of silane-modified melamine;

[0026] The components of the inner sheath layer include the following raw materials in parts by weight: 35 parts of ethylene-ethyl acrylate copolymer, 8 parts of tungsten diselenide, 10 parts of aluminate-modified zinc borate microcapsules, 6 parts of nano-tantalum carbide, 10 parts of PLGA-modified montmorillonite, 6 parts of bismaleimide-grafted carbon fibers, and 2 parts of nano-ZnO-Ag antibacterial agent;

[0027] The outer sheath layer comprises the following raw materials in parts by weight: 35 parts of polyetheretherketone-polytetrafluoroethylene blend, 5 parts of niobium diselenide, 10 parts of carboxylated nitrile rubber modified nanoclay, 4 parts of molybdenum ditelluride, 10 parts of zinc hydroxystannate, 3 parts of microencapsulated dicyclopentadiene and 2 parts of vulcanizing agent.

[0028] The preparation method of borazane-modified polybenzoxazine is as follows: 100 g of benzoxazine monomer, 10 mmol of triethylborazine, and 200 mL of toluene are taken, the benzoxazine monomer and toluene are mixed, stirred and dissolved at 80°C, triethylborazine is added dropwise, refluxed for 10 hours, the solvent is removed by distillation under reduced pressure, the product is washed with ethanol three times, and finally dried under vacuum conditions at 60°C for 12 hours.

[0029] The preparation method of molybdenum disulfide quantum dot-polyimide nanofibers is as follows: 10g of molybdenum disulfide powder is mixed with 20g of lithium chloride, ultrasonically treated in ether at 320W for 50h, high-speed centrifuged to obtain the supernatant, and ethanol precipitated to obtain molybdenum disulfide quantum dot-polyimide nanofibers.

[0030] The preparation method of aluminate-modified zinc borate microcapsules is as follows: 20 g of zinc borate is dispersed in 200 mL of deionized water, 40 g of polyurea formaldehyde prepolymer is added, the pH is adjusted to 4.5, and the mixture is stirred at 60° C. for 2 h to form microcapsules. Then, an aluminate coupling agent (3.2% by weight of the zinc borate) is added, and the mixture is refluxed in xylene at 80° C. for 3 h to obtain aluminate-modified zinc borate microcapsules.

[0031] The preparation method of the polyetheretherketone-polytetrafluoroethylene blend is as follows: polyetheretherketone with a melt index of 10 g / 10 min and polytetrafluoroethylene micropowder with a particle size of 5.5 μm are mixed in a mass ratio of 7:3, and the mixture is blended and granulated using a twin-screw extruder to obtain the polyetheretherketone-polytetrafluoroethylene blend, wherein the extrusion granulation temperature of the twin-screw extruder is 380° C. and the screw length-diameter ratio is 30:1.

[0032] This embodiment also discloses a method for preparing an environmentally friendly flame-retardant new energy charging pile cable, which includes the following steps:

[0033] S1. Preheat the conductor to 80°C, and extrude the components of the insulation layer onto the conductor using a single-screw extruder at a temperature of 210-220°C and a speed of 70 r / min to form an insulation layer;

[0034] S2. The insulating layer is cooled with warm water at 20°C, and the components of the inner sheath layer are extruded by a twin-screw extruder at a temperature of 210-220°C and a speed of 130 r / min to form the inner sheath layer;

[0035] S3, the inner sheath layer is cooled by cold water at 5℃, and the components of the outer sheath layer are extruded by a reciprocating single screw extruder at a temperature of 360-400℃ and a speed of 40r / min to form the inner sheath layer, and then subjected to 1000mW / cm 2 After light curing for 30 seconds and winding, the environmentally friendly flame-retardant new energy charging pile cable is obtained;

[0036] Among them, the pulling speeds of the insulation layer, inner sheath layer and outer sheath layer are 15m / min, 10m / min and 8m / min respectively.

[0037] Example 2:

[0038] This embodiment discloses an environmentally friendly flame-retardant new energy charging pile cable. The difference between this embodiment and embodiment 1 is only the difference in the content of each component of the insulation layer, inner sheath layer and outer sheath layer. Specifically, in parts by weight:

[0039] The components of the insulating layer include the following raw materials in parts by weight: 35 parts of hydrogenated styrene-butadiene block copolymer, 20 parts of borazane-modified polybenzoxazine, 10 parts of antimony sulfide, 13 parts of molybdenum disulfide quantum dot-polyimide nanofibers, 10 parts of hydroxyapatite, 7 parts of copper hexacyanoferrate, 13 parts of polyetheretherketone grafted titanium dioxide nanoparticles, 8 parts of benzoxazine-modified boron nitride nanotubes and 5 parts of silane-modified melamine;

[0040] The components of the inner sheath layer include the following raw materials in parts by weight: 40 parts of ethylene-ethyl acrylate copolymer, 12 parts of tungsten diselenide, 15 parts of aluminate-modified zinc borate microcapsules, 10 parts of nano-tantalum carbide, 15 parts of PLGA-modified montmorillonite, 10 parts of bismaleimide-grafted carbon fibers, and 6 parts of nano-ZnO-Ag antibacterial agent;

[0041] The outer sheath layer comprises the following raw materials in parts by weight: 45 parts of polyetheretherketone-polytetrafluoroethylene blend, 10 parts of niobium diselenide, 15 parts of carboxylated nitrile rubber modified nanoclay, 8 parts of molybdenum ditelluride, 20 parts of zinc hydroxystannate, 7 parts of microencapsulated dicyclopentadiene and 6 parts of vulcanizing agent.

[0042] Example 3:

[0043] This embodiment discloses an environmentally friendly flame-retardant new energy charging pile cable. The difference between this embodiment and embodiment 1 is only the difference in the content of each component of the insulation layer, inner sheath layer and outer sheath layer. Specifically, in parts by weight:

[0044] The components of the insulating layer include the following raw materials in parts by weight: 30 parts of hydrogenated styrene-butadiene block copolymer, 15 parts of borazane-modified polybenzoxazine, 8 parts of antimony sulfide, 10 parts of molybdenum disulfide quantum dot-polyimide nanofibers, 7 parts of hydroxyapatite, 5 parts of copper hexacyanoferrate, 10 parts of polyetheretherketone grafted titanium dioxide nanoparticles, 6 parts of benzoxazine-modified boron nitride nanotubes and 3 parts of silane-modified melamine;

[0045] The components of the inner sheath layer include the following raw materials in parts by weight: 37 parts of ethylene-ethyl acrylate copolymer, 9 parts of tungsten diselenide, 13 parts of aluminate-modified zinc borate microcapsules, 7 parts of nano-tantalum carbide, 12 parts of PLGA-modified montmorillonite, 8 parts of bismaleimide-grafted carbon fibers, and 4 parts of nano-ZnO-Ag antibacterial agent;

[0046] The outer sheath layer comprises the following raw materials in parts by weight: 40 parts of polyetheretherketone-polytetrafluoroethylene blend, 8 parts of niobium diselenide, 12 parts of carboxylated nitrile rubber modified nanoclay, 6 parts of molybdenum ditelluride, 15 parts of zinc hydroxystannate, 5 parts of microencapsulated dicyclopentadiene and 4 parts of vulcanizing agent.

[0047] Comparative Example 1:

[0048] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that borazane-modified polybenzoxazine is not added.

[0049] Comparative Example 2:

[0050] An environmentally friendly flame-retardant new energy charging pile cable. The only difference between this cable and Example 3 is that no antimony sulfide is added.

[0051] Comparative Example 3:

[0052] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that molybdenum disulfide quantum dot-polyimide nanofiber is not added.

[0053] Comparative Example 4:

[0054] An environmentally friendly flame-retardant new energy charging pile cable. The only difference between this cable and Example 3 is that no hydroxyapatite is added.

[0055] Comparative Example 5:

[0056] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that copper hexacyanoferrate is not added.

[0057] Comparative Example 6:

[0058] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that no polyetheretherketone grafted titanium dioxide nanoparticles are added.

[0059] Comparative Example 7:

[0060] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that benzoxazine-modified boron nitride nanotubes are not added.

[0061] Comparative Example 8:

[0062] An environmentally friendly flame-retardant new energy charging pile cable. The only difference between this cable and Example 3 is that silane-modified melamine is not added.

[0063] Comparative Example 9:

[0064] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that no tungsten diselenide is added.

[0065] Comparative Example 10:

[0066] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that no aluminate-modified zinc borate microcapsules are added.

[0067] Comparative Example 11:

[0068] An environmentally friendly flame-retardant new energy charging pile cable. The only difference between this cable and Example 3 is that no nano-tantalum carbide is added.

[0069] Comparative Example 12:

[0070] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that PLGA-modified montmorillonite is not added.

[0071] Comparative Example 13:

[0072] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that no bismaleimide-grafted carbon fiber is added.

[0073] Comparative Example 14:

[0074] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that no niobium diselenide is added.

[0075] Comparative Example 15:

[0076] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that carboxyl nitrile rubber modified nanoclay is not added.

[0077] Comparative Example 16:

[0078] An environmentally friendly flame-retardant new energy charging pile cable. The only difference between this cable and Example 3 is that molybdenum ditelluride is not added.

[0079] Comparative Example 17:

[0080] An environmentally friendly flame-retardant new energy charging pile cable. The only difference between this cable and Example 3 is that zinc hydroxystannate is not added.

[0081] Comparative Example 18:

[0082] An environmentally friendly flame-retardant new energy charging pile cable. The difference between this cable and Example 3 is that no microencapsulated dicyclopentadiene is added.

[0083] The cables obtained in Examples 1-3 and Comparative Examples 1-18 were subjected to performance tests on flame retardancy, outer sheath tensile strength, and abrasion resistance. The specific test methods are as follows:

[0084] Flame retardancy is tested according to the cable flame retardancy test method in GB / T 2406.2;

[0085] The tensile strength of the outer sheath layer is tested according to the test method in GB / T 2951.11;

[0086] Abrasion resistance: According to GB / T 3960, outer sheath Taber abrasion times (CS-10 wheel, 1000g) ≥ 20000 times test weight loss in grams;

[0087] See Table 1 for the results.

[0088] Table 1 Performance parameters of the cables obtained in Examples 1-3 and Comparative Examples 1-18

[0089] Group Oxygen index / % Tensile strength / MPa Abrasion resistance (weight loss in grams) / g Example 1 39 101 0.25 Example 2 39 101 0.26 Example 3 40 102 0.23 Comparative Example 1 30 100 0.26 Comparative Example 2 31 100 0.26 Comparative Example 3 37 101 0.26 Comparative Example 4 37 100 0.26 Comparative Example 5 39 101 0.25 Comparative Example 6 39 100 0.26 Comparative Example 7 38 101 0.26 Comparative Example 8 39 100 0.26 Comparative Example 9 34 101 0.26 Comparative Example 10 38 101 0.26 Comparative Example 11 39 100 0.27 Comparative Example 12 39 100 0.26 Comparative Example 13 38 101 0.26 Comparative Example 14 39 101 0.25 Comparative Example 15 38 94 0.31 Comparative Example 16 39 99 0.29 Comparative Example 17 34 101 0.25 Comparative Example 18 39 94 0.30

[0090] In summary, the absence of borazane-modified polybenzoxazine, antimony sulfide, tungsten diselenide, and aluminate-modified zinc borate microcapsules significantly impacts the cable's flame retardancy. The absence of carboxylated nitrile rubber-modified nanoclay and microencapsulated dicyclopentadiene significantly impacts the cable's tensile strength. The absence of carboxylated nitrile rubber-modified nanoclay, molybdenum ditelluride, and microencapsulated dicyclopentadiene significantly impacts the cable's wear resistance.

[0091] 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. An environmentally friendly flame-retardant new energy charging pile cable, characterized in that: Including the conductor, insulation layer, inner sheath layer and outer sheath layer arranged in sequence from the inside to the outside, in parts by weight: The components of the insulating layer include the following raw materials in parts by weight: 25-35 parts of hydrogenated styrene-butadiene block copolymer, 10-20 parts of borazane-modified polybenzoxazine, 6-10 parts of antimony sulfide, 7-13 parts of molybdenum disulfide quantum dot-polyimide nanofibers, 5-10 parts of hydroxyapatite, 3-7 parts of copper hexacyanoferrate, 7-13 parts of polyetheretherketone grafted titanium dioxide nanoparticles, 4-8 parts of benzoxazine-modified boron nitride nanotubes and 1-5 parts of silane-modified melamine; The components of the inner sheath layer include the following raw materials in parts by weight: 35-40 parts of ethylene-ethyl acrylate copolymer, 8-12 parts of tungsten diselenide, 10-15 parts of aluminate-modified zinc borate microcapsules, 6-10 parts of nano-tantalum carbide, 10-15 parts of PLGA-modified montmorillonite, 6-10 parts of bismaleimide-grafted carbon fibers, and 2-6 parts of nano-ZnO-Ag antibacterial agent. The components of the outer sheath layer include the following raw materials in parts by weight: 35-45 parts of polyetheretherketone-polytetrafluoroethylene blend, 5-10 parts of niobium diselenide, 10-15 parts of carboxylated nitrile rubber modified nanoclay, 4-8 parts of molybdenum ditelluride, 10-20 parts of zinc hydroxystannate, 3-7 parts of microencapsulated dicyclopentadiene and 2-6 parts of vulcanizing agent.

2. The environmentally friendly flame-retardant new energy charging pile cable according to claim 1, characterized in that: In parts by weight: The components of the insulating layer include the following raw materials in parts by weight: 30 parts of hydrogenated styrene-butadiene block copolymer, 15 parts of borazane-modified polybenzoxazine, 8 parts of antimony sulfide, 10 parts of molybdenum disulfide quantum dot-polyimide nanofibers, 7 parts of hydroxyapatite, 5 parts of copper hexacyanoferrate, 10 parts of polyetheretherketone grafted titanium dioxide nanoparticles, 6 parts of benzoxazine-modified boron nitride nanotubes and 3 parts of silane-modified melamine; The components of the inner sheath layer include the following raw materials in parts by weight: 37 parts of ethylene-ethyl acrylate copolymer, 9 parts of tungsten diselenide, 13 parts of aluminate-modified zinc borate microcapsules, 7 parts of nano-tantalum carbide, 12 parts of PLGA-modified montmorillonite, 8 parts of bismaleimide-grafted carbon fibers, and 4 parts of nano-ZnO-Ag antibacterial agent; The outer sheath layer comprises the following raw materials in parts by weight: 40 parts of polyetheretherketone-polytetrafluoroethylene blend, 8 parts of niobium diselenide, 12 parts of carboxylated nitrile rubber modified nanoclay, 6 parts of molybdenum ditelluride, 15 parts of zinc hydroxystannate, 5 parts of microencapsulated dicyclopentadiene and 4 parts of vulcanizing agent.

3. The environmentally friendly flame-retardant new energy charging pile cable according to claim 1 or 2, characterized in that: The preparation method of borazane-modified polybenzoxazine is as follows: 100 g of benzoxazine monomer, 10 mmol of triethylborazine, and 200 mL of toluene are taken, the benzoxazine monomer and toluene are mixed, stirred and dissolved at 80°C, triethylborazine is added dropwise, refluxed for 10 hours, the solvent is removed by distillation under reduced pressure, the product is washed with ethanol three times, and finally dried under vacuum conditions at 60°C for 12 hours.

4. The environmentally friendly flame-retardant new energy charging pile cable according to claim 1 or 2, characterized in that: The preparation method of molybdenum disulfide quantum dot-polyimide nanofibers is as follows: 10g of molybdenum disulfide powder is mixed with 20g of lithium chloride, ultrasonically treated in ether at 320W for 50h, high-speed centrifuged to obtain the supernatant, and ethanol precipitated to obtain molybdenum disulfide quantum dot-polyimide nanofibers.

5. The environmentally friendly flame-retardant new energy charging pile cable according to claim 1 or 2, characterized in that: The preparation method of aluminate-modified zinc borate microcapsules is as follows: 20 g of zinc borate is dispersed in 200 mL of deionized water, 40 g of polyurea formaldehyde prepolymer is added, the pH is adjusted to 4.5, and the mixture is stirred at 60° C. for 2 h to form microcapsules. Then, an aluminate coupling agent (3.2% by weight of the zinc borate) is added, and the mixture is refluxed in xylene at 80° C. for 3 h to obtain aluminate-modified zinc borate microcapsules.

6. The environmentally friendly flame-retardant new energy charging pile cable according to claim 1 or 2, characterized in that: The preparation method of the polyetheretherketone-polytetrafluoroethylene blend is as follows: polyetheretherketone with a melt index of 10g / 10min and polytetrafluoroethylene micropowder with a particle size of 5.5μm are mixed in a mass ratio of 7:3, and the mixture is blended and granulated using a twin-screw extruder to obtain the polyetheretherketone-polytetrafluoroethylene blend.

7. The environmentally friendly flame-retardant new energy charging pile cable according to claim 6, characterized in that: The extrusion granulation temperature of the twin-screw extruder is 380°C, and the screw length-diameter ratio is 30:

1.

8. The environmentally friendly flame-retardant new energy charging pile cable according to claim 6, characterized in that: The cable preparation method includes the following steps: S1. Preheat the conductor to 80°C, and extrude the components of the insulation layer onto the conductor using a single-screw extruder at a temperature of 210-220°C and a speed of 70 r / min to form an insulation layer; S2. The insulating layer is cooled with warm water at 20°C, and the components of the inner sheath layer are extruded by a twin-screw extruder at a temperature of 210-220°C and a speed of 130 r / min to form the inner sheath layer; S3, the inner sheath layer is cooled by cold water at 5℃, and the components of the outer sheath layer are extruded by a reciprocating single screw extruder at a temperature of 360-400℃ and a speed of 40r / min to form the inner sheath layer, and then subjected to 1000mW / cm 2 After light curing for 30 seconds and winding, the environmentally friendly flame-retardant new energy charging pile cable is obtained; Among them, the pulling speeds of the insulation layer, inner sheath layer and outer sheath layer are 15m / min, 10m / min and 8m / min respectively.