An electromagnetic interference resistant power cable and method of making the same

Abstract

The application discloses an electromagnetic interference resistant power cable and a preparation method thereof, and relates to the technical field of cables.The (4-vinylphenyl) sodium methyl sulfonate modified cross-linked polyethylene is used as a raw material to achieve the corrosion resistance effect; then the acrylic ester and the additive are uniformly mixed, and the first spraying is carried out at high temperature to form an insulating layer outside the conductor, thereby prolonging the service life of the cable; and the adhesive and the composite particles and copper nano powder are mixed to carry out the second spraying, thereby forming a composite outer shielding layer with a lotus leaf-like epidermis structure, which can achieve the corrosion resistance effect and enhance the electromagnetic shielding effect. The composite particles are formed by the reaction of zinc sulfate heptahydrate, 5-nitrobenzimidazole and lauryl amido propyl trimethyl ammonium chloride to form ZIF-8 structure loaded with lauryl amido propyl trimethyl ammonium chloride, so that the effects of wear resistance and electromagnetic interference resistance are achieved, the compatibility between the inorganic particles and the polymer matrix is improved, and good flame retardation effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to an electromagnetic interference resistant power cable and its manufacturing method. Background Technology

[0002] In modern industry and power transmission, electromagnetic interference-resistant power cables play a crucial role. With the widespread application of electronic equipment and the continuous development of power systems, the performance requirements for power cables are becoming increasingly stringent. In many complex application environments, such as those in the chemical and metallurgical industries, the cables are exposed to a large number of corrosive substances, including various acids, alkalis, gases, and liquids. However, existing electromagnetic interference-resistant power cables often fail to withstand the erosion of their protective layers and internal structures when exposed to these corrosive media, leading to a decline in insulation performance, corrosion of the metal conductors, and consequently affecting the stability and safety of power transmission.

[0003] Meanwhile, due to prolonged exposure to the outdoors or mechanical forces, cables are susceptible to wear and tear. Conventional electromagnetic interference (EMI) resistant power cables perform poorly in terms of abrasion resistance; their surface protective layer is easily scratched and damaged, directly exposing the internal structure and accelerating aging and damage, significantly shortening their lifespan. Furthermore, the short cable lifespan not only increases replacement and maintenance costs, but frequent repairs and replacements can also affect the continuity of power supply, causing considerable inconvenience and potential losses to production and daily life. These problems limit the application of EMI resistant power cables in more scenarios, necessitating the development of new technologies and materials to address these drawbacks. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-electromagnetic interference power cable and its manufacturing method, so as to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an anti-electromagnetic interference power cable, the anti-electromagnetic interference power cable comprising a conductor, a modified cross-linked polyethylene insulation coating, a lotus leaf-like organic-inorganic composite shielding coating, and a modified cross-linked polyethylene sheath layer; the modified cross-linked polyethylene is made from sodium (4-vinylphenyl)methanesulfonate modified cross-linked polyethylene.

[0006] Furthermore, the modified cross-linked polyethylene insulating coating is obtained by mixing and granulating modified cross-linked polyethylene, binder, and additives, followed by high-temperature spraying.

[0007] Furthermore, the lotus leaf-like organic-inorganic composite shielding coating is prepared by spraying composite particles made of zinc sulfate heptahydrate, 5-nitrobenzimidazole, and lactamide propyltrimethylammonium chloride mixed with binder and copper nanoparticles.

[0008] Furthermore, a method for preparing an electromagnetic interference resistant power cable includes the following preparation steps:

[0009] (1) Mix 15-21 parts of cross-linked polyethylene with a molecular weight of 80,000-150,000, 11-17 parts of sodium (4-vinylphenyl)methanesulfonate, and 0.1-0.2 parts of peroxide initiator evenly, melt-blend at 125-135℃ for 30-60 min, and cool naturally to room temperature to obtain modified cross-linked polyethylene.

[0010] (2) Mix 36-52 parts of composite particles, 14-26 parts of acrylate binder and 20-30 parts of copper nanoparticles with a particle size of 50-150nm at an ultrasonic frequency of 24-30kHz and a stirring speed of 80rpm for 5-15min to obtain a shielding layer mixture.

[0011] (3) Place the modified cross-linked polyethylene granules in a spraying machine and spray them evenly at 120-150℃ onto a surface with a cross-sectional area of ​​0.5-50 mm². 2 The copper conductor surface is naturally cooled to 30°C to form a modified cross-linked polyethylene insulation coating. Then, a shielding layer mixture is sprayed to form a lotus leaf-like organic-inorganic composite shielding coating. After drying at 30-40°C for 24-36 hours, modified cross-linked polyethylene particles are extruded onto the outer periphery of the shielding layer at 150-170°C and naturally cooled to room temperature to obtain an electromagnetic interference resistant power cable.

[0012] Furthermore, the peroxide initiator in step (1) is any one or a mixture of benzoyl peroxide, sodium persulfate, and tert-butyl peroxide.

[0013] Further, the preparation steps of the composite particles in step (2) are as follows: 5-13 parts of zinc sulfate heptahydrate and 60-140 parts of deionized water are mixed evenly, and a mixture of 8-22 parts of 5-nitrobenzimidazole, 0.5-1.5 parts of lactamidopropyltrimethylammonium chloride and 95-210 parts of methanol is added. The mixture is stirred at 100 rpm for 10-20 min, then transferred to a centrifuge and centrifuged at 10000 rpm for 5-15 min. The solid is collected, washed twice with methanol and deionized water alternately, and dried in an oven at 30-40℃ for 18-24 h to obtain the composite particles.

[0014] Furthermore, the spraying conditions in step (3) are: spray gun moving speed 550-750mm / s, current 1400A-1600A, and spraying distance 500-700mm.

[0015] Further, the preparation steps of the modified cross-linked polyethylene particles in step (3) are as follows: 51 to 77 parts of modified cross-linked polyethylene, 12 to 18 parts of acrylate binder, and 1 to 2 parts of 2,6-di-tert-butyl-4-methylphenol are placed in a mixer and mixed at 140 to 180°C for 10 to 20 minutes, then granulated to obtain modified cross-linked polyethylene particles.

[0016] Furthermore, the thickness of the modified cross-linked polyethylene insulating coating in step (3) is 0.5 to 5 mm.

[0017] Furthermore, the thickness of the lotus leaf-like organic-inorganic composite shielding coating in step (3) is 0.1 to 1.2 mm.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0019] This invention uses cross-linked polyethylene modified with sodium (4-vinylphenyl)methanesulfonate as raw material, introducing sulfonate groups to weaken the displacement reaction between acidic media and cables, neutralize alkaline substances, and enhance the interaction between molecular chains, reducing porosity and thus improving corrosion resistance. Then, after being uniformly mixed with acrylate and additives, a first spraying is performed at high temperature to form an insulating layer on the outside of the conductor. This layer can adhere to irregular surfaces and has good flexibility. When the cable deforms or vibrates, the insulating coating can deform accordingly, maintaining good insulation performance and preventing cracking or peeling, thus extending the cable's service life. Furthermore, while resisting electromagnetic interference, it can also act as an intermediate layer to bond the conductor and the shielding layer. A second spraying is then performed using a mixture of adhesive, composite particles, and copper nanoparticles to form a composite outer shielding layer with a lotus leaf-like upper skin structure. This prevents corrosive liquids from entering the polymer molecular chain, achieving corrosion resistance while also enhancing electromagnetic shielding.

[0020] The composite particles form a ZIF-8 structure loaded with lactamyltrimethylammonium chloride through the reaction of zinc sulfate heptahydrate, 5-nitrobenzimidazole, and lactamyltrimethylammonium chloride. This structure possesses certain flexibility and dynamic reversibility. When the cable material experiences wear and develops micro-cracks or defects, the coordination bonds in the ZIF-8 structure break and rearrange, restoring the original crystal structure and morphology, thus achieving an anti-wear effect. Simultaneously, utilizing the capillary adsorption effect of ZIF-8, and in conjunction with the hydroxyl groups in lactamyltrimethylammonium chloride, it can form complexes with metals, achieving… In terms of load-bearing effect, when electromagnetic radiation is incident, it can provide a large number of active sites and interfaces. Electromagnetic waves will be continuously reflected, scattered and refracted in these porous structures, thereby achieving the effect of anti-electromagnetic interference and improving the compatibility between inorganic particles and polymer matrix, thereby reducing the agglomeration of inorganic particles and enabling them to be more uniformly dispersed in polymer, indirectly improving the overall performance of cable material. In addition, during the cable combustion process, composite particles can form a continuous and dense barrier layer, reducing the transfer of heat and oxygen, thereby achieving a good flame-retardant effect. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] To more clearly illustrate the method provided by the present invention, the following embodiments are provided in detail. The testing methods for various indicators of the electromagnetic interference resistant power cable produced in the following embodiments are as follows:

[0023] Tensile strength: Examples and comparative examples of the same mass were tested in accordance with the provisions of GB / T 8804.2.

[0024] Wear amount: Take the same mass of the example and comparative examples and test them in accordance with GB / T2951-2008.

[0025] Corrosion resistance test: Take the same mass of the example and comparative examples and prepare plastic block samples of the same size. Take three clean beakers and prepare 10% hydrochloric acid and 10% NaOH solutions respectively. Immerse the samples in the prepared solutions and keep them in a sealed environment for 45 days. Then take out the samples and observe the corrosion on the surface.

[0026] Flame retardancy rating: Examples and comparative examples of the same mass were tested in accordance with GB / T 19666-2019.

[0027] Shielding efficiency: Examples and comparative examples of the same quality were used, with the same thickness of the shielding layer sprayed on. The shielding efficiency of the cables was tested and recorded.

[0028] Example 1

[0029] (1) Mix 15 parts of cross-linked polyethylene with a molecular weight of 80,000, 11 parts of sodium (4-vinylphenyl)methanesulfonate and 0.1 parts of benzoyl peroxide evenly, melt-blend at 125°C for 30 min, and cool naturally to room temperature to obtain modified cross-linked polyethylene.

[0030] (2) Mix 5 parts zinc sulfate heptahydrate and 60 parts deionized water evenly, add a mixture of 8 parts 5-nitrobenzimidazole, 0.5 parts lactamide propyltrimethylammonium chloride and 95 parts methanol, stir at 100 rpm for 10 min, then transfer to a centrifuge and centrifuge at 10000 rpm for 5 min, collect the solid, wash twice with methanol and deionized water alternately, and dry in a 30℃ oven for 18 h to obtain composite particles;

[0031] (3) Mix 36 parts of composite particles, 14 parts of acrylic binder and 20 parts of copper nanoparticles with a particle size of 50 nm at an ultrasonic frequency of 24 kHz and a stirring speed of 80 rpm for 5 min to obtain a shielding layer mixture.

[0032] (4) Place 51 parts of modified cross-linked polyethylene, 12 parts of acrylate binder and 1 part of 2,6-di-tert-butyl-4-methylphenol in a mixer and mix at 140°C for 10 min. Then, granulate to obtain modified cross-linked polyethylene granules.

[0033] (5) Place the modified cross-linked polyethylene granules in a spraying machine, and spray them evenly at 120°C on a surface with a cross-sectional area of ​​0.5 mm² at a spray gun moving speed of 550 mm / s, a current of 1400 A, and a spraying distance of 500 mm. 2 The copper conductor surface is naturally cooled to 30°C to form a modified cross-linked polyethylene insulation coating with a thickness of 0.5 mm. Then, a shielding layer mixture is sprayed to form a lotus leaf-like organic-inorganic composite shielding coating with a thickness of 0.1 mm. After drying at 30°C for 24 hours, modified cross-linked polyethylene particles are extruded on the outer periphery of the shielding layer at 150°C and naturally cooled to room temperature to obtain an electromagnetic interference resistant power cable.

[0034] Example 2

[0035] (1) Mix 18 parts of cross-linked polyethylene with a molecular weight of 115,000, 14 parts of sodium (4-vinylphenyl)methanesulfonate and 0.15 parts of sodium persulfate evenly, melt-blend at 130°C for 45 min, and cool naturally to room temperature to obtain modified cross-linked polyethylene.

[0036] (2) Mix 9 parts zinc sulfate heptahydrate and 100 parts deionized water evenly, add a mixture of 15 parts 5-nitrobenzimidazole, 1 part lactamide propyltrimethylammonium chloride and 152 parts methanol, stir at 100 rpm for 15 min, then transfer to a centrifuge and centrifuge at 10000 rpm for 10 min, collect the solid, wash twice with methanol and deionized water alternately, and dry in a 35℃ oven for 21 h to obtain composite particles;

[0037] (3) 44 parts of composite particles, 20 parts of acrylic binder and 25 parts of copper nanoparticles with a particle size of 100 nm were mixed at an ultrasonic frequency of 27 kHz and a stirring speed of 80 rpm for 10 min to obtain a shielding layer mixture.

[0038] (4) 64 parts of modified cross-linked polyethylene, 15 parts of acrylate binder and 1.5 parts of 2,6-di-tert-butyl-4-methylphenol were placed in a mixer and mixed at 160°C for 15 minutes. The mixture was then granulated to obtain modified cross-linked polyethylene granules.

[0039] (5) Place the modified cross-linked polyethylene granules in a spraying machine, and spray them evenly at 135°C onto a surface with a cross-sectional area of ​​25 mm² at a spray gun moving speed of 650 mm / s, a current of 1500 A, and a spraying distance of 600 mm. 2 The copper conductor surface is naturally cooled to 30°C to form a modified cross-linked polyethylene insulation coating with a thickness of 2.75 mm. Then, a shielding layer mixture is sprayed to form a lotus leaf-like organic-inorganic composite shielding coating with a thickness of 0.65 mm. After drying at 35°C for 30 h, modified cross-linked polyethylene particles are extruded on the outer periphery of the shielding layer at 160°C and naturally cooled to room temperature to obtain an electromagnetic interference resistant power cable.

[0040] Example 3

[0041] (1) 21 parts of cross-linked polyethylene with a molecular weight of 150,000, 17 parts of sodium (4-vinylphenyl)methanesulfonate and 0.2 parts of tert-butyl peroxide were mixed evenly, melt-blended at 135°C for 60 min, and then naturally cooled to room temperature to obtain modified cross-linked polyethylene.

[0042] (2) Mix 13 parts zinc sulfate heptahydrate and 140 parts deionized water evenly, add a mixture of 22 parts 5-nitrobenzimidazole, 1.5 parts lactamide propyltrimethylammonium chloride and 210 parts methanol, stir at 100 rpm for 20 min, then transfer to a centrifuge and centrifuge at 10000 rpm for 15 min, collect the solid, wash twice with methanol and deionized water alternately, and dry in an oven at 40℃ for 24 h to obtain composite particles;

[0043] (3) Mix 52 parts of composite particles, 26 parts of acrylic binder and 30 parts of copper nanoparticles with a particle size of 150 nm at an ultrasonic frequency of 30 kHz and a stirring speed of 80 rpm for 15 min to obtain a shielding layer mixture.

[0044] (4) 77 parts of modified cross-linked polyethylene, 18 parts of acrylate binder and 2 parts of 2,6-di-tert-butyl-4-methylphenol were placed in a mixer and mixed at 180°C for 20 minutes. The mixture was then granulated to obtain modified cross-linked polyethylene granules.

[0045] (5) Place the modified cross-linked polyethylene granules in a spraying machine, and spray them evenly at 150°C onto a surface with a cross-sectional area of ​​50 mm² at a spray gun movement speed of 750 mm / s, a current of 1600 A, and a spraying distance of 700 mm. 2 The copper conductor surface is naturally cooled to 30°C to form a 5mm thick modified cross-linked polyethylene insulation coating. Then, a shielding layer mixture is sprayed to form a 1.2mm thick lotus leaf-like organic-inorganic composite shielding coating. After drying at 40°C for 36 hours, modified cross-linked polyethylene particles are extruded at 170°C on the outer periphery of the shielding layer and naturally cooled to room temperature to obtain an electromagnetic interference resistant power cable.

[0046] Comparative Example 1

[0047] The difference between Comparative Example 1 and Example 2 is that sodium (4-vinylphenyl)methanesulfonate was not used to modify the cross-linked polyethylene. The remaining steps are the same as in Example 2.

[0048] Comparative Example 2

[0049] The difference between Comparative Example 2 and Example 2 lies in step (5). Step (5) is changed to: extruding modified cross-linked polyethylene particles at 160°C onto a sheet with a cross-sectional area of ​​25 mm². 2 The copper conductor surface is naturally cooled to 30°C to form a modified cross-linked polyethylene insulation coating with a thickness of 2.75 mm. Then, a shielding layer mixture is sprayed on to form a lotus leaf-like organic-inorganic composite shielding coating with a thickness of 0.65 mm. After drying at 35°C for 30 hours, modified cross-linked polyethylene particles are extruded onto the outer periphery of the shielding layer at 160°C and naturally cooled to room temperature to obtain an electromagnetic interference-resistant power cable. The remaining steps are the same as in Example 2.

[0050] Comparative Example 3

[0051] The difference between Comparative Example 3 and Example 2 lies in step (5). Step (5) is changed to: placing the modified cross-linked polyethylene particles in a spraying machine, and uniformly spraying them at 135°C onto a cross-sectional area of ​​25 mm² with a spray gun moving speed of 650 mm / s, a current of 1500 A, and a spraying distance of 600 mm. 2The copper conductor surface is naturally cooled to 30°C to form a modified cross-linked polyethylene insulation coating with a thickness of 2.75 mm. A copper wire shielding layer is then braided using a braiding machine. Modified cross-linked polyethylene granules are then extruded onto the outer periphery of the shielding layer at 160°C and naturally cooled to room temperature to obtain an electromagnetic interference-resistant power cable. The remaining steps are the same as in Example 2.

[0052] Comparative Example 4

[0053] The difference between Comparative Example 4 and Example 2 is that step (2) is omitted, and step (3) is changed to: mixing 44 parts of lactamide propyltrimethylammonium chloride, 20 parts of acrylate binder, and 25 parts of copper nanoparticles with a particle size of 100 nm at an ultrasonic frequency of 27 kHz and a stirring speed of 80 rpm for 10 min to obtain the shielding layer mixture. The remaining steps are the same as in Example 2.

[0054] Comparative Example 5

[0055] The difference between Comparative Example 5 and Example 2 lies in step (2). Step (2) is changed to: mixing 9 parts of zinc sulfate heptahydrate and 100 parts of deionized water evenly, adding a mixture of 15 parts of 5-nitrobenzimidazole and 152 parts of methanol, stirring at 100 rpm for 15 min, then transferring to a centrifuge and centrifuging at 10,000 rpm for 10 min, collecting the solid, washing twice alternately with methanol and deionized water, and drying in a 35°C oven for 21 h to obtain composite particles. The remaining steps are the same as in Example 2.

[0056] Example of effect

[0057] Table 1 below shows the performance analysis results of the electromagnetic interference resistant power cables using Examples 1 to 3 and Comparative Examples 1 to 5 of the present invention.

[0058] Table 1

[0059]

[0060] A comparison of the experimental data from Examples 1, 2, and 3 with Comparative Example 1 reveals that modifying cross-linked polyethylene with sodium (4-vinylphenyl)methanesulfonate introduces sulfonate groups, weakening the displacement reaction between acidic media and the cable, neutralizing alkaline substances, and enhancing intermolecular chain interactions, thereby reducing porosity and improving corrosion resistance. A comparison of the experimental data from Examples 1, 2, and 3 with Comparative Example 2 shows that spraying an insulating layer at high temperatures allows it to adhere to irregular surfaces, exhibiting good flexibility. When the cable deforms or vibrates, the insulating coating deforms accordingly. It maintains good insulation performance, is less prone to cracking and detachment, and extends the service life of the cable. Furthermore, while providing electromagnetic interference resistance, it can also serve as an intermediate layer to bond the conductor and the shielding layer. A comparison of experimental data from Examples 1, 2, and 3 with Comparative Example 3 reveals that a composite outer shielding layer with a lotus leaf-like upper skin structure is formed by secondary spraying of a mixture of adhesive, composite particles, and copper nanoparticles. This not only prevents corrosive liquids from entering the polymer molecular chain, achieving corrosion resistance, but also enhances the electromagnetic shielding effect. The experimental data from Examples 1, 2, and 3 with Comparative Examples 4 and 5... Comparative analysis reveals that the ZIF-8 structure, formed by the reaction of zinc sulfate heptahydrate, 5-nitrobenzimidazole, and lactamide-propyltrimethylammonium chloride, exhibits certain flexibility and dynamic reversibility. When cable materials experience wear and develop micro-cracks or defects, the coordination bonds in the ZIF-8 structure break and rearrange, restoring the original crystal structure and morphology, thus achieving wear resistance. Furthermore, utilizing the capillary adsorption effect of ZIF-8, and in conjunction with the hydroxyl groups in lactamide-propyltrimethylammonium chloride, it can form complexes with metals. To achieve load-bearing effects, when electromagnetic radiation is incident, it can provide a large number of active sites and interfaces. Electromagnetic waves will be continuously reflected, scattered and refracted in these porous structures, thereby achieving the effect of resisting electromagnetic interference and improving the compatibility between inorganic particles and polymer matrix, thereby reducing the agglomeration of inorganic particles and enabling them to be more uniformly dispersed in polymer, indirectly improving the overall performance of cable material. In addition, during the cable combustion process, composite particles can form a continuous and dense barrier layer, reducing the transfer of heat and oxygen, thereby achieving a good flame-retardant effect.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. An electromagnetic interference resistant power cable, characterized in that, The anti-electromagnetic interference power cable comprises a conductor, a modified cross-linked polyethylene insulating coating, a lotus-like organic-inorganic composite shielding coating and a modified cross-linked polyethylene sheath layer; the modified cross-linked polyethylene is prepared from (4-vinylphenyl) sodium methyl sulfonate modified cross-linked polyethylene; The modified cross-linked polyethylene insulating coating is prepared by mixing, granulating and high-temperature spraying of the modified cross-linked polyethylene, a binder and an additive. The lotus-like organic-inorganic composite shielding coating is prepared by mixing and spraying of composite particles prepared from zinc sulfate heptahydrate, 5-nitrobenzimidazole and lactamide propyl trimethyl ammonium chloride, and a binder and copper nano powder.

2. A method for the production of an electromagnetic interference resistant power cable, characterized in that The preparation steps include: (1) uniformly mixing 15-21 parts of cross-linked polyethylene with a molecular weight of 80000-150000, 11-17 parts of (4-vinylphenyl) sodium methyl sulfonate and 0.1-0.2 parts of a peroxide initiator, melt blending at 125-135°C for 30-60 min, and naturally cooling to room temperature to prepare modified cross-linked polyethylene; (2) mixing 36-52 parts of composite particles, 14-26 parts of an acrylate binder and 20-30 parts of copper nano powder with a particle size of 50-150 nm at an ultrasonic frequency of 24-30 kHz and a stirring speed of 80 rpm for 5-15 min to prepare a shielding layer mixture; (3) The modified cross-linked polyethylene particles are placed in a spraying machine and uniformly sprayed on the surface of the copper conductor with a cross-sectional area of 0.5-50 mm 2 at 120-150°C, naturally cooled to 30°C to form a modified cross-linked polyethylene insulating coating, then the shielding layer mixture is sprayed to form a lotus-leaf-like organic-inorganic composite shielding coating, dried at 30-40°C for 24-36 h, and the modified cross-linked polyethylene particles are extruded around the shielding layer at 150-170°C and naturally cooled to room temperature to obtain an anti-electromagnetic interference power cable.

3. A method of manufacturing an electromagnetic interference resistant power cable according to claim 2, characterized in that, In step (1), the peroxide initiator is any one or a mixture of two or more of dibenzoyl peroxide, sodium persulfate and tert-butyl peroxybenzoate.

4. A method of manufacturing an electromagnetic interference resistant power cable according to claim 2, characterized in that, In step (2), the preparation steps of the composite particles are as follows: uniformly mixing 5-13 parts of zinc sulfate heptahydrate and 60-140 parts of deionized water, adding a mixed solution prepared from 8-22 parts of 5-nitrobenzimidazole, 0.5-1.5 parts of lactamide propyl trimethyl ammonium chloride and 95-210 parts of methanol, stirring at 100 rpm for 10-20 min, then transferring to a centrifuge and centrifuging at 10000 rpm for 5-15 min, collecting the solid, washing with methanol and deionized water alternately for 2 times, and drying in an oven at 30-40°C for 18-24 h to prepare the composite particles.

5. A method of manufacturing an electromagnetic interference resistant power cable according to claim 2, characterized in that, In step (3), the spraying conditions are as follows: a spraying gun moving speed of 550-750 mm / s, an electric current of 1400 A-1600 A and a spraying distance of 500-700 mm.

6. A method of manufacturing an electromagnetic interference resistant power cable according to claim 2, characterized in that, In step (3), the preparation steps of the modified cross-linked polyethylene particles are as follows: placing 51-77 parts of modified cross-linked polyethylene, 12-18 parts of an acrylate binder and 1-2 parts of 2,6-di-tert-butyl-4-methylphenol in an internal mixer, internal mixing at 140-180°C for 10-20 min, and pelletizing to prepare the modified cross-linked polyethylene particles.

7. A method of manufacturing an electromagnetic interference resistant power cable according to claim 2, characterized in that, In step (3), the thickness of the modified cross-linked polyethylene insulating coating is 0.5-5 mm.

8. A method of manufacturing an electromagnetic interference resistant power cable according to claim 2, characterized in that, In step (3), the thickness of the lotus-like organic-inorganic composite shielding coating is 0.1-1.2 mm.

Images