CN117384461B - New energy automobile charging wire material and preparation process thereof - Google Patents
New energy automobile charging wire material and preparation process thereof Download PDFInfo
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
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Abstract
The invention relates to a new energy automobile charging wire material, which comprises the following raw materials in parts by weight: 30-50 parts of SEBS resin, 12-20 parts of polyamide thermoplastic elastomer, 5-8 parts of maleic anhydride grafted EVA, 6-15 parts of filler type flame retardant, 0.5-1.5 parts of coupling agent, 2-5 parts of lubricant, 0.2-0.8 part of heat stabilizer and 0.1-0.6 part of light stabilizer; wherein the filler type flame retardant is silicon oil crosslinking modified silicon nitride. The charging wire material for the new energy automobile is prepared from an environment-friendly halogen-free material, and has the advantages of high strength, good insulativity, excellent heat aging resistance, strong tear resistance, good oil resistance, good flame retardance and small smoke density.
Description
Technical Field
The invention relates to the field of cables, in particular to a new energy automobile charging wire material and a preparation process thereof.
Background
At present, new energy automobiles have become global trends, and new energy automobile industry in China will enter a rapid development stage. The automobile cable is used as one of important components of the new energy automobile, and the new energy automobile has high requirements on softness, mechanical physical properties, electrical properties and the like of the high-voltage cable and the charging pile cable used by the new energy automobile. Because of various complex conditions such as vibration, friction, ozone, greasy dirt, high heat, cold and electromagnetic radiation in the interior of an automobile, automobile cables are required to have various performances such as tear resistance, oil resistance, high and low temperature resistance, oxidation resistance and the like. The PVC material is used as a universal cable material which is most widely applied, large in consumption and longest in application history, is also widely applied to the field of new energy automobiles, but because the PVC material contains a large amount of chlorine elements, a large amount of dense smoke can be emitted during combustion to suffocate people, the visibility is affected, some cancerogenic substances and HCl gas are generated, and serious harm is caused to the environment. With the development of low-smoke halogen-free insulating material manufacturing technology, gradually replacing PVC insulation has become a necessary trend of cable development.
In the prior art, a high-voltage cable and a charging pile cable of a new energy automobile mostly adopt halogen-free flame-retardant thermoplastic elastomer TPE as insulating layer and sheath layer materials. The halogen-free flame-retardant thermoplastic elastomer TPE has the advantages of good elasticity, good low temperature resistance and convenient processing, but has the defects of poor heat aging resistance, poor tear resistance, poor electrical insulation property, poor oil resistance and large smoke density, and is difficult to meet the requirements of high-voltage cables and charging pile cables of new energy automobiles.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a new energy automobile charging wire material and a preparation process thereof.
The aim of the invention is realized by adopting the following technical scheme:
in a first aspect, the invention provides a new energy automobile charging wire material, which comprises the following raw materials in parts by weight:
30-50 parts of SEBS resin, 12-20 parts of polyamide thermoplastic elastomer, 5-8 parts of maleic anhydride grafted EVA, 6-15 parts of filler type flame retardant, 0.5-1.5 parts of coupling agent, 2-5 parts of lubricant, 0.2-0.8 part of heat stabilizer and 0.1-0.6 part of light stabilizer.
Preferably, the SEBS resin is one of the types of Korea G1701, korea A1535 and Korea A1536H.
Preferably, the type of the polyamide thermoplastic elastomer is one of polyether block amide Pebax 7033 SP 01, polyether block amide Pebax 4033 SA 01 and polyether block amide Pebax 35R53 SP 01.
Preferably, the grafting ratio of the maleic anhydride grafted EVA is 1.2%, and the melt index is 2.5-3g/10min (190 ℃,2.16 kg).
Preferably, the filler type flame retardant is silicon nitride crosslinked and modified by silicone oil, and the preparation method of the silicon nitride crosslinked and modified by silicone oil comprises the following steps:
s1, epoxypropane activated silicon nitride:
weighing nano silicon nitride, uniformly dispersing in deionized water, adding epoxybromopropane while stirring, heating to 50-60 ℃ in water bath, preserving heat, stirring for 2-3h, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain epoxypropane activated silicon nitride (PO-Si) 3 N 4 ）；
S2, crosslinking modified silicon nitride:
weighing propylene oxide activated silicon nitride, dispersing uniformly in deionized water again, adding polyallylamine, heating to 50-60 ℃ in water bath, stirring for reaction for 3-5h, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain cross-linked modified silicon nitride (PAAO-Si) 3 N 4 ）；
S3, silicon oil crosslinking modified silicon nitride:
weighing amino silicone oil, adding the amino silicone oil into dimethylbenzene, and fully stirring until the amino silicone oil is uniformly dissolved to obtain an amino silicone oil solution; adding cross-linked modified silicon nitride into amino silicone oil solution, stirring in water bath at 80-90deg.C for reacting for 10-15 hr, centrifuging, washing with alcohol for at least three times, and drying to obtain silicon oil cross-linked modified silicon nitride (SO-PAAO-Si) 3 N 4 ）；
Preferably, in the step S1, the granularity of the nano silicon nitride is 300-500nm, and the mass ratio of the nano silicon nitride to the epoxy bromopropane to the deionized water is 1:0.24-0.36:10-20.
Preferably, in the step S2, the mass ratio of the propylene oxide activated silicon nitride to the polyallylamine to the deionized water is 1:0.13-0.2:10-20.
Preferably, in S2, the molecular weight of polyallylamine is 5000-8000.
Preferably, in the S3, the amino silicone oil has an amino molar content of 0.6% -1.2%.
Preferably, in the step S3, the mass ratio of the cross-linked modified silicon nitride to the amino silicone oil to the xylene is 1:0.45-0.6:10-20.
Preferably, the coupling agent is one of 3-aminopropyl trimethoxysilane, gamma-aminopropyl triethoxysilane, 3-glycidyl propyl methyl diethoxysilane, vinyl tris (beta-methoxyethoxy) silane.
Preferably, the lubricant is zinc stearate or calcium stearate.
Preferably, the heat stabilizer is an organotin stabilizer comprising one of di-n-octyltin maleate, monobutyl triisooctyltin, dioctyl tin dicarboxylate and di-n-octyltin dilaurate.
Preferably, the light stabilizer is one of UV-770, UV-1164, UV-292, UV-791.
In a second aspect, the invention provides a preparation method of a new energy automobile charging wire, comprising the following steps:
(1) Weighing the raw materials of the charging wire according to parts by weight, and then mixing the raw materials into a stirrer, wherein the temperature of mixing and stirring is 110-120 ℃, the stirring speed is 300-500rpm, and the stirring time is 10-20min;
(2) Putting the mixed raw materials into a double-screw extruder, and carrying out melt extrusion to obtain a charging wire material; wherein the extrusion temperature is 180-260 ℃, the screw rotation speed is 200-300rpm, and the length-diameter ratio is 35-38.
The beneficial effects of the invention are as follows:
1. the charging wire material for the new energy automobile is prepared from an environment-friendly halogen-free material, and has the advantages of high strength, good insulativity, excellent heat aging resistance, strong tear resistance, good oil resistance, good flame retardance and small smoke density.
2. According to the invention, the thermoplastic rubber SEBS resin and the polyamide thermoplastic elastomer are used as base materials, the SEBS resin has the advantages of good ageing resistance and high elasticity, the polyamide thermoplastic elastomer has the advantages of high toughness, ageing resistance, oil resistance and good wear resistance, and the combination of the SEBS resin and the polyamide thermoplastic elastomer can exert better effects. In addition, maleic anhydride grafted EVA is used as a compatilizer to enhance the compatibility of the material. The filler type flame retardant is self-made and obtained, is used as reinforcing filler, and has higher flame retardance.
3. The filler type flame retardant prepared by the invention is characterized in that the surface of nano silicon nitride is activated by using epoxy bromopropane, and the surface of nano silicon nitride is rich in a large number of hydroxyl groups and can be combined with bromine groups in the epoxy bromopropane, so that the epoxy propane activated silicon nitride is prepared. Then combining the epoxypropane activated silicon nitride with polyallylamine, wherein the polyallylamine molecule contains a large amount of amino groups and can be combined and reacted with part of epoxy groups in the epoxypropane activated silicon nitride, so as to prepare the crosslinked modified silicon nitride; and then, combining amino silicone oil with the cross-linked modified silicon nitride, and finally preparing the silicon oil cross-linked modified silicon nitride by combining amino groups in the amino silicone oil with the rest epoxy groups.
4. In the preparation process of the flame retardant silicone oil crosslinking modified silicon nitride, enough epoxy bromopropane is required to be added in the preparation process of the epoxy propane activated silicon nitride, so that the sufficiency of epoxy groups is ensured; in the preparation process of the cross-linked modified silicon nitride, the addition amount of polyallylamine is small, and the polyallylamine has the functions of activation and adsorption, thereby facilitating the subsequent cross-linking with amino silicone oil; in the preparation process of the silicon nitride cross-linked and modified silicon nitride, the amino silicon oil is added in a sufficient amount, so that the silicon oil is fully combined with epoxy groups on the surface of the silicon nitride, and a more fully cross-linked flame retardant is obtained.
Detailed Description
The technical scheme of the invention is described below through specific examples. It is to be understood that the mention of one or more method steps of the present invention does not exclude the presence of other method steps before and after the combination step or that other method steps may be interposed between these explicitly mentioned steps; it should also be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Moreover, unless otherwise indicated, the numbering of the method steps is merely a convenient tool for identifying the method steps and is not intended to limit the order of arrangement of the method steps or to limit the scope of the invention in which the invention may be practiced, as such changes or modifications in their relative relationships may be regarded as within the scope of the invention without substantial modification to the technical matter.
In order to better understand the above technical solution, exemplary embodiments of the present invention are described in more detail below. While exemplary embodiments of the invention are shown, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention is further described with reference to the following examples.
Example 1
The new energy automobile charging wire material comprises the following raw materials in parts by weight:
40 parts of SEBS resin, 16 parts of polyamide thermoplastic elastomer, 6 parts of maleic anhydride grafted EVA, 10 parts of filler type flame retardant, 1 part of coupling agent, 3 parts of lubricant, 0.5 part of heat stabilizer and 0.4 part of light stabilizer.
The SEBS resin is of the type of Korotten G1701 in the United states; the model of the polyamide thermoplastic elastomer is polyether block amide Pebax 7033 SP 01; the grafting ratio of the maleic anhydride grafted EVA was 1.2% and the melt index was 2.8g/10min (190 ℃ C., 2.16 kg).
The coupling agent is 3-aminopropyl trimethoxy silane. The lubricant is zinc stearate. The heat stabilizer is di-n-octyl tin maleate. The light stabilizer is UV-770.
The filler type flame retardant is silicon nitride modified by silicone oil crosslinking, and the preparation method of the silicon nitride modified by silicone oil crosslinking comprises the following steps:
s1, epoxypropane activated silicon nitride:
weighing nano silicon nitride, uniformly dispersing in deionized water, adding epoxybromopropane while stirring, heating to 55 ℃ in water bath, preserving heat, stirring for 2.5h, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain epoxypropane activated silicon nitride (PO-Si) 3 N 4 ）；
Wherein the granularity of the nano silicon nitride is 300-500nm, and the mass ratio of the nano silicon nitride to the epoxy bromopropane to the deionized water is 1:0.28:15.
S2, crosslinking modified silicon nitride:
weighing propylene oxide activated silicon nitride, dispersing uniformly in deionized water again, adding polyallylamine, heating to 55 ℃ in water bath, stirring for 4 hours, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain cross-linked modified silicon nitride (PAAO-Si) 3 N 4 ）；
Wherein the molecular weight of polyallylamine is 6000, and the mass ratio of the epoxypropane activated silicon nitride to the polyallylamine to the deionized water is 1:0.16:15.
S3, silicon oil crosslinking modified silicon nitride:
weighing amino silicone oil, adding the amino silicone oil into dimethylbenzene, and fully stirring until the amino silicone oil is uniformly dissolved to obtain an amino silicone oil solution; adding cross-linked modified silicon nitride into amino silicone oil solution, stirring in water bath at 85deg.C for reacting for 12 hr, centrifuging, washing with alcohol for at least three times, and drying to obtain silicon oil cross-linked modified silicon nitride (SO-PAAO-Si) 3 N 4 ）；
Wherein the amino group molar content of the amino silicone oil is 0.9%, and the mass ratio of the cross-linked modified silicon nitride to the amino silicone oil to the dimethylbenzene is 1:0.52:15.
The preparation method of the new energy automobile charging wire material comprises the following steps:
(1) Weighing the raw materials of the charging wire according to parts by weight, and then mixing the raw materials into a stirrer, wherein the temperature of mixing and stirring is 120 ℃, the stirring speed is 400rpm, and the stirring time is 15min;
(2) Putting the mixed raw materials into a double-screw extruder, and carrying out melt extrusion to obtain a charging wire material; wherein the extrusion temperature was 210℃and the screw rotation speed was 250rpm, and the aspect ratio was 36.
Example 2
The new energy automobile charging wire material comprises the following raw materials in parts by weight:
30 parts of SEBS resin, 12 parts of polyamide thermoplastic elastomer, 5 parts of maleic anhydride grafted EVA, 6 parts of filler type flame retardant, 0.5 part of coupling agent, 2 parts of lubricant, 0.2 part of heat stabilizer and 0.1 part of light stabilizer.
The SEBS resin is of the type of Ipomoea batatas A1535; the model of the polyamide thermoplastic elastomer is polyether block amide Pebax 4033 SA 01; the grafting ratio of the maleic anhydride grafted EVA was 1.2% and the melt index was 2.8g/10min (190 ℃ C., 2.16 kg).
The coupling agent is gamma-aminopropyl triethoxysilane. The lubricant is calcium stearate. The heat stabilizer is monobutyl triisotin octoate. The light stabilizer is UV-1164.
The filler type flame retardant is silicon nitride modified by silicone oil crosslinking, and the preparation method of the silicon nitride modified by silicone oil crosslinking comprises the following steps:
s1, epoxypropane activated silicon nitride:
weighing nano silicon nitride, uniformly dispersing in deionized water, adding epoxybromopropane while stirring, heating to 50 ℃ in water bath, preserving heat and stirring for 2 hours, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain epoxypropane activated silicon nitride (PO-Si) 3 N 4 ）；
Wherein the granularity of the nano silicon nitride is 300-500nm, and the mass ratio of the nano silicon nitride to the epoxy bromopropane to the deionized water is 1:0.24:10.
S2, crosslinking modified silicon nitride:
weighing propylene oxide activated silicon nitride, dispersing uniformly in deionized water again, adding polyallylamine, heating to 50 ℃ in water bath, stirring for 3h for reaction, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain cross-linked modified silicon nitride (PAAO-Si) 3 N 4 ）；
Wherein the molecular weight of polyallylamine is 5000, and the mass ratio of the epoxypropane activated silicon nitride, polyallylamine and deionized water is 1:0.13:10.
S3, silicon oil crosslinking modified silicon nitride:
weighing amino silicone oil, adding the amino silicone oil into dimethylbenzene, and fully stirring until the amino silicone oil is uniformly dissolved to obtain an amino silicone oil solution; adding cross-linked modified silicon nitride into amino silicone oil solution, stirring in water bath at 80deg.C for reaction for 10 hr, centrifuging, washing with alcohol for at least three times, and drying to obtain silicon oil cross-linked modified silicon nitride (SO-PAAO-Si) 3 N 4 ）；
Wherein the amino group molar content of the amino silicone oil is 0.6%, and the mass ratio of the cross-linked modified silicon nitride to the amino silicone oil to the dimethylbenzene is 1:0.45:10.
The preparation method of the new energy automobile charging wire material comprises the following steps:
(1) Weighing the raw materials of the charging wire according to parts by weight, and then mixing the raw materials into a stirrer, wherein the temperature of mixing and stirring is 110 ℃, the stirring speed is 300rpm, and the stirring time is 10min;
(2) Putting the mixed raw materials into a double-screw extruder, and carrying out melt extrusion to obtain a charging wire material; wherein the extrusion temperature was 180℃and the screw rotation speed was 200rpm and the aspect ratio was 35.
Example 3
The new energy automobile charging wire material comprises the following raw materials in parts by weight:
50 parts of SEBS resin, 20 parts of polyamide thermoplastic elastomer, 8 parts of maleic anhydride grafted EVA, 15 parts of filler type flame retardant, 1.5 parts of coupling agent, 5 parts of lubricant, 0.8 part of heat stabilizer and 0.6 part of light stabilizer.
The SEBS resin is of the type of Ipomoea batatas A1536H; the model of the polyamide thermoplastic elastomer is polyether block amide Pebax 35R53 SP 01; the grafting ratio of the maleic anhydride grafted EVA was 1.2% and the melt index was 2.8g/10min (190 ℃ C., 2.16 kg).
The coupling agent is 3-glycidyl propyl methyl diethoxy silane. The lubricant is calcium stearate. The heat stabilizer is dioctyl tin dicarboxylate. The light stabilizer is UV-292.
The filler type flame retardant is silicon nitride modified by silicone oil crosslinking, and the preparation method of the silicon nitride modified by silicone oil crosslinking comprises the following steps:
s1, epoxypropane activated silicon nitride:
weighing nano silicon nitride, uniformly dispersing in deionized water, adding epoxybromopropane while stirring, heating to 60 ℃ in water bath, preserving heat and stirring for 3 hours, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain epoxypropane activated silicon nitride (PO-Si) 3 N 4 ）；
Wherein the granularity of the nano silicon nitride is 300-500nm, and the mass ratio of the nano silicon nitride to the epoxy bromopropane to the deionized water is 1:0.36:20.
S2, crosslinking modified silicon nitride:
weighing propylene oxide activated silicon nitride, dispersing uniformly in deionized water again, adding polyallylamine, heating to 60 ℃ in water bath, stirring for reaction for 5 hours, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain cross-linked modified silicon nitride (PAAO-Si) 3 N 4 ）；
Wherein the molecular weight of polyallylamine is 8000, and the mass ratio of the epoxypropane activated silicon nitride, polyallylamine and deionized water is 1:0.2:20.
S3, silicon oil crosslinking modified silicon nitride:
weighing amino silicone oil, adding the amino silicone oil into dimethylbenzene, and fully stirring until the amino silicone oil is uniformly dissolved to obtain an amino silicone oil solution; adding cross-linked modified silicon nitride into amino silicone oil solution, stirring in water bath at 90 deg.C for reaction for 15 hr, centrifuging, washing with alcohol for at least three times, and drying to obtain silicon oil cross-linked modified silicon nitride (SO-PAAO-Si) 3 N 4 ）；
Wherein the amino group molar content of the amino silicone oil is 1.2%, and the mass ratio of the cross-linked modified silicon nitride to the amino silicone oil to the dimethylbenzene is 1:0.6:20.
The preparation method of the new energy automobile charging wire material comprises the following steps:
(1) Weighing the raw materials of the charging wire according to parts by weight, and then mixing the raw materials into a stirrer, wherein the temperature of mixing and stirring is 120 ℃, the stirring speed is 500rpm, and the stirring time is 20min;
(2) Putting the mixed raw materials into a double-screw extruder, and carrying out melt extrusion to obtain a charging wire material; wherein the extrusion temperature was 260℃and the screw rotation speed was 300rpm, and the aspect ratio was 38.
Comparative example 1
The charging wire material for new energy automobiles is different from example 1 in that the filler type flame retardant is silicon nitride.
Comparative example 2
Compared with the embodiment 1, the new energy automobile charging wire material is characterized in that the filler type flame retardant is propylene oxide activatedSilicon nitride (PO-Si) 3 N 4 ) (the preparation procedure is the same as in example S1).
Comparative example 3
Compared with the embodiment 1, the new energy automobile charging wire material is characterized in that the filler type flame retardant is cross-linked modified silicon nitride (PAAO-Si) 3 N 4 ) (the preparation procedure is the same as in example S1).
Experimental detection
The wire materials prepared in example 1 and comparative examples 1 to 3 were tested.
Tensile strength and elongation at break reference ASTM D412; tear strength reference ASTM D624; oil resistance test refers to ASTM D471, expansion in IRM902 standard oil.
The test results are shown in Table 1 below:
TABLE 1 electric wire Material Performance test results
| Example 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Tensile Strength (MPa) | 13.5 | 11.2 | 11.8 | 12.3 |
| Elongation at break (%) | 587 | 514 | 520 | 545 |
| Tear Strength (kN/m) | 49.2 | 40.3 | 42.2 | 45.8 |
| Flame retardant UL94 (grade) | V-0 | V-2 | V-2 | V-1 |
| Heat distortion temperature (DEG C) | 152 | 127 | 131 | 140 |
| Oil resistance expansion ratio (%) | 10.3 | 17.2 | 15.4 | 11.6 |
As can be seen from Table 1 above, the strength of example 1 was higher, the tear resistance was better, the flame retardance UL94 reached V-0 level, indicating strong flame retardance, the heat distortion temperature reached 152 ℃, indicating good heat resistance, and the IRM902 standard oil swell ratio was only 10.3%, indicating good oil resistance.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. The new energy automobile charging wire material is characterized by comprising the following raw materials in parts by weight:
30-50 parts of SEBS resin, 12-20 parts of polyamide thermoplastic elastomer, 5-8 parts of maleic anhydride grafted EVA, 6-15 parts of filler type flame retardant, 0.5-1.5 parts of coupling agent, 2-5 parts of lubricant, 0.2-0.8 part of heat stabilizer and 0.1-0.6 part of light stabilizer;
wherein the filler type flame retardant is silicon oil crosslinking modified silicon nitride;
the preparation method of the silicone oil crosslinking modified silicon nitride comprises the following steps:
s1, epoxypropane activated silicon nitride:
weighing nano silicon nitride, uniformly dispersing in deionized water, adding epoxybromopropane while stirring, heating to 50-60 ℃ in water bath, preserving heat and stirring for 2-3h, after the reaction is finished, centrifugally separating a solid product, washing with water for at least three times, and drying to obtain epoxypropane activated silicon nitride;
s2, crosslinking modified silicon nitride:
weighing propylene oxide activated silicon nitride, dispersing uniformly in deionized water again, adding polyallylamine, heating to 50-60 ℃ in water bath, stirring for reaction for 3-5h, centrifuging the solid product after the reaction, washing with water for at least three times, and drying to obtain crosslinked modified silicon nitride;
s3, silicon oil crosslinking modified silicon nitride:
weighing amino silicone oil, adding the amino silicone oil into dimethylbenzene, and fully stirring until the amino silicone oil is uniformly dissolved to obtain an amino silicone oil solution; adding cross-linked modified silicon nitride into the amino silicone oil solution, stirring in a water bath at 80-90 ℃ for reaction for 10-15h, centrifuging the solid product after the reaction, washing with alcohol for at least three times, and drying to obtain silicone oil cross-linked modified silicon nitride;
in the S2, the mass ratio of the epoxypropane activated silicon nitride to the polyallylamine to the deionized water is 1:0.13-0.2:10-20.
2. The new energy automobile charging wire of claim 1, wherein the SEBS resin is one of G1701, a1535, a 1536H.
3. The new energy automobile charging wire material according to claim 1, wherein the polyamide thermoplastic elastomer is one of polyether block amide Pebax 7033 SP 01, polyether block amide Pebax 4033 SA 01 and polyether block amide Pebax 35r53 SP 01.
4. The new energy automobile charging wire material according to claim 1, wherein the grafting ratio of the maleic anhydride grafted EVA is 1.2%, and the melt index is 2.5-3g/10min under the conditions of 190 ℃ and 2.16 kg.
5. The new energy automobile charging wire material according to claim 1, wherein in the step S1, the mass ratio of nano silicon nitride to epoxy bromopropane to deionized water is 1:0.24-0.36:10-20; in the step S3, the mass ratio of the cross-linked modified silicon nitride to the amino silicone oil to the dimethylbenzene is 1:0.45-0.6:10-20.
6. The new energy automobile charging wire material according to claim 1, wherein the coupling agent is one of 3-aminopropyl trimethoxysilane, gamma-aminopropyl triethoxysilane, 3-glycidyl propyl methyl diethoxysilane, vinyl tris (beta-methoxyethoxy) silane; the lubricant is zinc stearate or calcium stearate.
7. The new energy automobile charging wire material according to claim 1, wherein the heat stabilizer is an organotin stabilizer comprising one of di-n-octyltin maleate, monobutyl triisooctyltin octoate, dioctyltin dicarboxylate and di-n-octyltin dilaurate.
8. The new energy automobile charging wire material of claim 1, wherein the light stabilizer is one of UV-770, UV-1164, UV-292, UV-791.
9. A method for preparing the new energy automobile charging wire material according to claim 1, which is characterized by comprising the following steps:
(1) Weighing the raw materials of the charging wire according to parts by weight, and then mixing the raw materials into a stirrer, wherein the temperature of mixing and stirring is 110-120 ℃, the stirring speed is 300-500rpm, and the stirring time is 10-20min;
(2) Putting the mixed raw materials into a double-screw extruder, and carrying out melt extrusion to obtain a charging wire material; wherein the extrusion temperature is 180-260 ℃, the screw rotation speed is 200-300rpm, and the length-diameter ratio is 35-38.
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