High-performance wave-absorbing cable and preparation method thereof

Abstract

The invention relates to the field of cables, in particular to a high-performance wave-absorbing cable and a preparation method thereof. The preparation method of the high-performance wave-absorbing cable comprises the following steps: mixing a graphene oxide dispersion liquid and silicon dioxide nanospheres, and calcining to obtain porous graphene; mixing the porous graphene, the boron nitride nanofibers, a silane coupling agent and ethanol, carrying out a reaction, and mixing a product obtained after the reaction, the porous graphene and ethanol to obtain an intercalation compound; mixing the intercalation compound, ferric nitrate, ferric sulfate and water, and reacting to obtain composite powder; mixing the composite powder, dopamine and a buffer solution, and reacting to obtain a wave-absorbing material; the preparation method comprises the following steps: extruding polyvinyl chloride, a wave-absorbing material, an antioxidant, ethylene propylene diene monomer, epoxidized soybean oil and a stabilizer in a double-screw extruder for granulation, and then molding in the extruder to obtain the high-performance wave-absorbing cable. According to the cable, the absorption strength and the frequency band width of the material in the frequency band of 2-18 GHz are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of cables, and in particular to a high-performance wave-absorbing cable and a preparation method thereof. Background Art

[0002] With the rapid development of electronic information technology, communications technology, and the defense industry, electromagnetic wave pollution is becoming increasingly serious. This is particularly true in areas such as radar stealth, electronic packaging, and communications cables. High-performance electromagnetic wave absorbing materials are urgently needed to reduce or shield unwanted electromagnetic interference from equipment and systems. As a core functional unit for mitigating electromagnetic interference, the performance of absorbing materials directly determines the electromagnetic compatibility, safety, and stability of related products.

[0003] Currently, common absorbing materials include magnetic materials, carbon-based conductive materials, ceramic materials, and their composite systems. Magnetic materials offer excellent magnetic loss resistance, but their high density, narrow bandwidth, and poor flexibility make them difficult to meet the practical needs of flexible electronics and cable products. Carbon-based materials, such as carbon nanotubes and graphene, exhibit superior electrical conductivity and dielectric properties, making them suitable for impedance matching and enhancing electromagnetic wave absorption. However, pure carbon systems often suffer from problems such as a single absorption frequency band, insufficient mechanical strength, and poor processing stability.

[0004] To improve the absorption performance, researchers have gradually turned to the development of multi-component synergistic composite absorbing material systems. For example, the construction of multi-scale pore structures to enhance interface polarization, or the introduction of magneto-electric composite mechanisms to broaden the absorption band, have become important directions in the design of absorbing materials. However, many composite absorbing materials currently face the following difficulties in practical applications: First, poor interface compatibility leads to unstable internal structure of the composite system, prone to agglomeration, debonding and other phenomena, affecting the consistency of electromagnetic properties; second, the interface bonding force between traditional powders and polymer matrices is weak, and composite cable products are prone to delamination or performance degradation during the extrusion process; third, some preparation processes are cumbersome and difficult to be compatible with existing industrial processing routes.

[0005] Therefore, there is an urgent need for a method for preparing absorbing materials with high absorption efficiency, excellent mechanical properties, good interface compatibility and industrial processability, so as to prepare new absorbing cables that meet the application needs of modern high-performance cables. Summary of the Invention

[0006] In view of this, the present invention is dedicated to providing a high-performance absorbing cable and a preparation method thereof, wherein the high-performance absorbing cable has high absorbing efficiency.

[0007] In order to solve the above technical problems, this application is implemented as follows:

[0008] The present invention provides a method for preparing a high-performance absorbing cable, comprising the following steps:

[0009] S10, mixing the graphene oxide dispersion and the silicon dioxide nanospheres, and calcining them to obtain porous graphene;

[0010] By co-calcining graphene oxide and silica nanospheres, a well-ordered three-dimensional porous graphene skeleton was successfully constructed. On the one hand, the two-dimensional graphene sheets provide excellent electron migration channels, enhancing conductive losses; on the other hand, the porous structure significantly increases the specific surface area of ​​the material, which helps enhance interfacial polarization and improve microwave attenuation.

[0011] S20, mixing boron nitride nanofibers, a silane coupling agent, and ethanol to react, mixing the resulting product, porous graphene, and ethanol to disperse, and obtaining an intercalation composite;

[0012] Boron nitride nanofibers are modified with a silane coupling agent (such as KH550) and synergistically constructed with porous graphene to form an intercalation composite. Boron nitride nanofibers have high thermal conductivity and dielectric stability, effectively adjusting the dielectric parameters of the composite system, improving impedance matching, and avoiding reflection and scattering of electromagnetic waves at the material interface.

[0013] S30, mixing the intercalation complex, ferric nitrate, ferric sulfate and water, adjusting the pH, and reacting to obtain a composite powder;

[0014] Ferric nitrate and ferric sulfate are reacted with the intercalation complex under suitable pH and temperature conditions, and ferrosoferric oxide is filled in the gaps to form a magnetic composite powder. Magnetic loss mechanisms (such as eddy current loss and natural resonance) are further introduced, effectively broadening the absorption band.

[0015] S40, mixing the composite powder, dopamine and buffer solution, and reacting them to obtain a wave absorbing material;

[0016] With the help of Tris-HCl buffer, dopamine self-polymerization is induced to form a polydopamine coating with a muscle-like attachment structure, which improves the interfacial compatibility between the absorbing material and the polymer matrix and further enhances the mechanical stability and electromagnetic properties of the composite system.

[0017] S50, polyvinyl chloride, absorbing material, antioxidant, EPDM rubber, epoxy soybean oil, and stabilizer are extruded into granules in a twin-screw extruder, and then formed by the extruder to obtain a high-performance absorbing cable.

[0018] Preferably, in the above-mentioned method for preparing a high-performance absorbing cable, in step S10, the ratio of the graphene oxide dispersion to the silica nanospheres is 100-300 mL: 1-9 mg;

[0019] In step S10, the concentration of the graphene oxide dispersion is 1 to 3 mg / mL;

[0020] In step S10, the average particle size of the silica nanospheres is 50-100 nm.

[0021] Preferably, in the above method for preparing a high-performance absorbing cable, in step S10, the calcination temperature is 700-900° C., and the calcination time is 1-3 hours.

[0022] Preferably, in the above-mentioned method for preparing a high-performance absorbing cable, in step S20, the amount ratio of the boron nitride nanofiber, the silane coupling agent and the ethanol is 1-3 g: 0.2-0.5 g: 100-200 mL;

[0023] In step S20, the silane coupling agent includes KH550;

[0024] In step S20, the usage ratio of the boron nitride nanofibers, porous graphene and ethanol is 1-3 g: 2-4 g: 100-200 mL.

[0025] Preferably, in the above-mentioned method for preparing a high-performance absorbing cable, in step S20, the reaction temperature is 50-60° C., and the reaction time is 3-5 h;

[0026] In step S20, the dispersion time is 10 to 12 hours.

[0027] Preferably, in the above-mentioned method for preparing a high-performance absorbing cable, in step S30, the ratio of the intercalation compound, ferric nitrate, ferric sulfate and water is 0.8-1.5 g: 0.5-0.8 g: 0.2-0.4 g: 100-150 mL;

[0028] In step S30, the target pH value is 8 to 9;

[0029] In step S30, the reaction temperature is 70-90° C., and the reaction time is 1-3 hours.

[0030] Preferably, in the above-mentioned method for preparing a high-performance absorbing cable, in step S40, the usage ratio of the composite powder, dopamine and buffer solution is 1-2 g: 0.1-0.5 g: 100-150 mL;

[0031] In step S40, the pH value of the buffer solution is 8.5, the buffer solution includes a Tris-HCl buffer solution, and the concentration of the buffer solution is 10 mM;

[0032] In step S40, the reaction temperature is 40-50° C., and the reaction time is 12-24 hours.

[0033] Preferably, in the above-mentioned method for preparing a high-performance absorbing cable, in step S50, the mass ratio of polyvinyl chloride, absorbing material, antioxidant, EPDM rubber, epoxy soybean oil, and stabilizer is 60:15-20:8-12:2-5:5-7:0.5-1;

[0034] In step S50, the antioxidant includes antioxidant 1010 and / or antioxidant 168;

[0035] In step S50, the stabilizer includes a calcium zinc stabilizer.

[0036] Preferably, in the above method for preparing a high-performance absorbing cable, in step S50, the extrusion temperature is 180-190°C.

[0037] The present invention also provides a high-performance wave-absorbing cable prepared by the method for preparing the high-performance wave-absorbing cable.

[0038] Through the above technical solution, the beneficial technical effects of the present invention are:

[0039] (1) The absorbing material provided by the present invention has a three-dimensional ordered porous structure, which significantly increases the specific surface area. The graphene layered structure provides an excellent electron migration channel and improves the conductive loss. Then, the boron nitride nanofiber modified by KH550 works synergistically with graphene to construct an intercalation structure. The boron nitride nanofiber has high thermal conductivity and low dielectric loss characteristics, which helps to improve the overall impedance matching capability and reduce electromagnetic wave reflection and scattering. The ferroferric oxide particles generated by the reaction of Fe(NO3)3 and Fe2(SO4)3 are filled in the intercalation skeleton, thereby establishing a magnetic loss mechanism (eddy current loss, natural resonance, etc.), and coordinating with electrical loss to achieve multiple synergistic absorption and broaden the absorption band; finally, the polydopamine coating improves the interface compatibility between the composite powder and the polymer, avoids interface debonding, improves the overall stability and consistency of the absorbing structure, and improves the stability of electromagnetic performance. That is, the porous graphene (conductive loss), magnetic component (magnetic loss), boron nitride fiber (dielectric regulation) and polydopamine coating (interface polarization) work together to achieve the synergistic coupling of dielectric loss and magnetic loss, significantly improving the absorption intensity and bandwidth of the material in the 2-18 GHz frequency band.

[0040] (2) The above-mentioned absorbing material is mixed with components such as polyvinyl chloride (PVC), antioxidant, EPDM rubber, epoxy soybean oil, stabilizer, etc., extruded into granules in a twin-screw extruder, and then extruded into high-performance absorbing cables. The raw materials used in the cables are economical and easy to obtain, the reaction conditions are mild, the process is controllable, and the preparation process does not involve highly toxic or high-risk intermediates. It is suitable for large-scale extrusion molding and has good industrial application prospects. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below by way of examples. The raw materials used in the examples can all be obtained through commercial sources.

[0042] Example 1

[0043] A method for preparing a high-performance absorbing cable comprises the following steps:

[0044] S10, mixing 200 mL of a graphene oxide dispersion having a concentration of 2 mg / mL and 4 mg of silica nanospheres having an average particle size of 100 nm, and calcining the mixture at 900° C. for 2 h to obtain porous graphene;

[0045] S20, 1 g of boron nitride nanofibers, 0.2 g of silane coupling agent KH550, and 200 mL of ethanol were mixed and reacted at 50°C for 5 h. The resulting product, 2 g of porous graphene, and 200 mL of ethanol were mixed and dispersed for 12 h to obtain an intercalation composite.

[0046] S30, mixing 0.8 g of the intercalation complex, 0.5 g of ferric nitrate, 0.2 g of ferric sulfate, and 150 mL of water, adjusting the pH to 9, reacting at 90° C. for 2 h, centrifuging, washing, and drying the resulting product to obtain a composite powder;

[0047] S40, mixing 2 g of the composite powder, 0.5 g of dopamine, and 150 mL of a Tris-HCl buffer solution having a pH value of 8.5 and a concentration of 10 mM, and reacting the mixture at 50° C. for 24 h to obtain an absorbing material;

[0048] S50. According to weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 10 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180°C to obtain a high-performance absorbing cable.

[0049] Example 2

[0050] A method for preparing a high-performance absorbing cable comprises the following steps:

[0051] S10, mixing 300 mL of a graphene oxide dispersion having a concentration of 2 mg / mL and 4 mg of silica nanospheres having an average particle size of 100 nm, and calcining the mixture at 800° C. for 2 h to obtain porous graphene;

[0052] S20, 1 g of boron nitride nanofibers, 0.2 g of silane coupling agent KH550, and 200 mL of ethanol were mixed and reacted at 50°C for 4 h. The resulting product, 2.5 g of porous graphene, and 200 mL of ethanol were mixed and dispersed for 12 h to obtain an intercalation composite.

[0053] S30, mixing 1 g of the intercalation complex, 0.5 g of ferric nitrate, 0.4 g of ferric sulfate, and 150 mL of water, adjusting the pH to 9, reacting at 90° C. for 3 h, centrifuging, washing, and drying the resulting product to obtain a composite powder;

[0054] S40, mixing 2 g of the composite powder, 0.4 g of dopamine, and 150 mL of a Tris-HCl buffer solution having a pH value of 8.5 and a concentration of 10 mM, and reacting the mixture at 50° C. for 24 h to obtain an absorbing material;

[0055] S50. By weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 8-12 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180° C. to obtain a high-performance absorbing cable.

[0056] Example 3

[0057] A method for preparing a high-performance absorbing cable comprises the following steps:

[0058] S10, mixing 100 mL of a graphene oxide dispersion having a concentration of 1 mg / mL and 2 mg of silica nanospheres having an average particle size of 100 nm, and calcining the mixture at 800° C. for 2 h to obtain porous graphene;

[0059] S20, 1 g of boron nitride nanofibers, 0.2 g of silane coupling agent KH550, and 200 mL of ethanol were mixed and reacted at 50°C for 3 h. The resulting product, 3 g of porous graphene, and 200 mL of ethanol were mixed and dispersed for 12 h to obtain an intercalation composite.

[0060] S30, mixing 1.2 g of the intercalation complex, 0.8 g of ferric nitrate, 0.2 g of ferric sulfate, and 150 mL of water, adjusting the pH to 9, reacting at 70° C. for 3 h, centrifuging, washing, and drying the resulting product to obtain a composite powder;

[0061] S40, mixing 2 g of the composite powder, 0.3 g of dopamine, and 150 mL of a Tris-HCl buffer solution having a pH value of 8.5 and a concentration of 10 mM, and reacting the mixture at 50° C. for 24 h to obtain an absorbing material;

[0062] S50. According to weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 10 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180°C to obtain a high-performance absorbing cable.

[0063] Example 4

[0064] A method for preparing a high-performance absorbing cable comprises the following steps:

[0065] S10, mixing 150 mL of a graphene oxide dispersion having a concentration of 3 mg / mL and 7 mg of silica nanospheres having an average particle size of 50 nm, and calcining the mixture at 900° C. for 2 h to obtain porous graphene;

[0066] S20, 1 g of boron nitride nanofibers, 0.2 g of silane coupling agent KH550, and 200 mL of ethanol were mixed and reacted at 60°C for 3 h. The resulting product, 3.5 g of porous graphene, and 200 mL of ethanol were mixed and dispersed for 12 h to obtain an intercalation composite.

[0067] S30, mixing 1.3 g of the intercalation complex, 0.8 g of ferric nitrate, 0.4 g of ferric sulfate, and 150 mL of water, adjusting the pH to 9, reacting at 70° C. for 3 h, centrifuging, washing, and drying the resulting product to obtain a composite powder;

[0068] S40, mixing 2 g of the composite powder, 0.2 g of dopamine, and 150 mL of a 10 mM Tris-HCl buffer solution having a pH of 8.5, and reacting at 50° C. for 24 h to obtain an absorbing material;

[0069] S50. According to weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 8 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180°C to obtain a high-performance absorbing cable.

[0070] Example 5

[0071] A method for preparing a high-performance absorbing cable comprises the following steps:

[0072] S10, mixing 250 mL of a graphene oxide dispersion having a concentration of 3 mg / mL and 9 mg of silica nanospheres having an average particle size of 50 nm, and calcining the mixture at 800° C. for 2 h to obtain porous graphene;

[0073] S20, 1 g of boron nitride nanofibers, 0.2 g of silane coupling agent KH550, and 200 mL of ethanol were mixed and reacted at 60°C for 5 h. The resulting product, 4 g of porous graphene, and 200 mL of ethanol were mixed and dispersed for 12 h to obtain an intercalation composite.

[0074] S30, mixing 1.5 g of the intercalation complex, 0.5 g of ferric nitrate, 0.2 g of ferric sulfate, and 150 mL of water, adjusting the pH to 9, reacting at 90° C. for 2 h, centrifuging, washing, and drying the resulting product to obtain a composite powder;

[0075] S40, mixing 2 g of the composite powder, 0.1 g of dopamine, and 150 mL of a Tris-HCl buffer solution having a pH value of 8.5 and a concentration of 10 mM, and reacting the mixture at 50° C. for 24 h to obtain an absorbing material;

[0076] S50. According to weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 12 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180°C to obtain a high-performance absorbing cable.

[0077] Comparative Example 1

[0078] A method for preparing a high-performance absorbing cable comprises the following steps:

[0079] S10, mixing 200 mL of a graphene oxide dispersion having a concentration of 2 mg / mL and 4 mg of silica nanospheres having an average particle size of 100 nm, and calcining the mixture at 900° C. for 2 h to obtain porous graphene;

[0080] S20, mixing 0.8 g of porous graphene, 0.5 g of ferric nitrate, 0.2 g of ferric sulfate and 150 mL of water, adjusting the pH to 9, reacting at 90° C. for 2 h, centrifuging, washing and drying the resulting product to obtain a composite powder;

[0081] S30, mixing 2 g of the composite powder, 20.5 g of dopamine, and 150 mL of a Tris-HCl buffer solution having a pH value of 8.5 and a concentration of 10 mM, and reacting the mixture at 50° C. for 24 h to obtain an absorbing material;

[0082] S40. According to weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 10 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180° C. to obtain a high-performance absorbing cable.

[0083] Comparative Example 2

[0084] A method for preparing a high-performance absorbing cable comprises the following steps:

[0085] S10, mixing 200 mL of a graphene oxide dispersion having a concentration of 2 mg / mL and 4 mg of silica nanospheres having an average particle size of 100 nm, and calcining the mixture at 900° C. for 2 h to obtain porous graphene;

[0086] S20, 1 g of boron nitride nanofibers, 0.2 g of silane coupling agent KH550, and 200 mL of ethanol were mixed and reacted at 50°C for 5 h. The resulting product, 2 g of porous graphene, and 200 mL of ethanol were mixed and dispersed for 12 h to obtain an intercalation composite.

[0087] S30, mixing 0.8 g of the intercalation complex, 0.5 g of ferric nitrate, 0.2 g of ferric sulfate, and 150 mL of water, adjusting the pH to 9, and reacting at 90° C. for 2 h to obtain an absorbing material;

[0088] S40. According to weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 10 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180° C. to obtain a high-performance absorbing cable.

[0089] Comparative Example 3

[0090] A method for preparing a high-performance absorbing cable comprises the following steps:

[0091] S10, 1 g of boron nitride nanofibers, 0.2 g of silane coupling agent KH550, and 200 mL of ethanol were mixed and reacted at 50°C for 5 h. The resulting product, 2 g of graphene, and 200 mL of ethanol were mixed and dispersed for 12 h to obtain an intercalation composite.

[0092] S20, mixing 0.8 g of the intercalation complex, 0.5 g of ferric nitrate, 0.2 g of ferric sulfate, and 150 mL of water, adjusting the pH to 9, reacting at 90° C. for 2 h, centrifuging, washing, and drying the resulting product to obtain a composite powder;

[0093] S30, mixing 2 g of the composite powder, 20.5 g of dopamine, and 150 mL of a Tris-HCl buffer solution having a pH value of 8.5 and a concentration of 10 mM, and reacting the mixture at 50° C. for 24 h to obtain an absorbing material;

[0094] S40. According to weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 10 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180° C. to obtain a high-performance absorbing cable.

[0095] Comparative Example 4

[0096] A method for preparing a high-performance absorbing cable comprises the following steps:

[0097] S10, mixing 1 g of boron nitride nanofibers, 2 g of graphene, 0.5 g of ferric nitrate, 0.2 g of ferric sulfate, and 150 mL of water, and dispersing the mixture to obtain an absorbing material;

[0098] S20. According to weight, 60 parts of polyvinyl chloride, 20 parts of absorbing material, 4 parts of antioxidant 1010, 10 parts of EPDM rubber, 6 parts of epoxy soybean oil, and 0.5 parts of calcium zinc stabilizer are extruded into granules in a twin-screw extruder, and then formed in an extruder at 180° C. to obtain a high-performance absorbing cable.

[0099] Performance Testing

[0100] (1) Insertion loss test: Refer to GB / T32596 to test absorption bandwidth and insertion loss;

[0101] (2) Thermal conductivity test: The thermal conductivity was tested according to GB / T10294. The results are shown in Table 1.

[0102] Table 1

[0103]

[0104]

[0105] As can be seen from Table 1, the insertion losses of Examples 1-5 are generally higher than those of Comparative Examples 1-3, demonstrating excellent electromagnetic wave shielding and absorption capabilities. This is primarily attributed to the synergistic effect of the porous graphene-boron nitride-iron salt composite absorber and the enhanced interfacial polarization with the substrate due to the surface dopamine coating. Furthermore, the thermal conductivity of the Examples is significantly higher than that of the Comparative Examples, demonstrating that the composite absorber not only possesses excellent electromagnetic absorption performance but also possesses a certain degree of thermal conductivity, which helps to dissipate heat in the cable during prolonged power-on or electromagnetic shock events, thereby improving safety.

[0106] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for preparing a high-performance absorbing cable, characterized in that: The following steps are involved: S10, mixing the graphene oxide dispersion and the silicon dioxide nanospheres, and calcining them to obtain porous graphene; S20, mixing boron nitride nanofibers, a silane coupling agent, and ethanol to react, mixing the resulting product, porous graphene, and ethanol to disperse, and obtaining an intercalation composite; S30, mixing the intercalation complex, ferric nitrate, ferric sulfate and water, adjusting the pH, and reacting to obtain a composite powder; S40, mixing the composite powder, dopamine and buffer solution, and reacting them to obtain a wave absorbing material; S50, polyvinyl chloride, absorbing material, antioxidant, EPDM rubber, epoxy soybean oil, and stabilizer are extruded into granules in a twin-screw extruder, and then formed by the extruder to obtain a high-performance absorbing cable.

2. The method for preparing a high-performance absorbing cable according to claim 1, wherein: In step S10, the ratio of the graphene oxide dispersion to the silica nanospheres is 100-300 mL: 1-9 mg; In step S10, the concentration of the graphene oxide dispersion is 1 to 3 mg / mL; In step S10, the average particle size of the silica nanospheres is 50-100 nm.

3. The method for preparing a high-performance absorbing cable according to claim 1, wherein: In step S10, the calcination temperature is 700-900° C., and the calcination time is 1-3 hours.

4. The method for preparing a high-performance absorbing cable according to claim 1, wherein: In step S20, the usage ratio of the boron nitride nanofiber, the silane coupling agent and the ethanol is 1-3 g: 0.2-0.5 g: 100-200 mL; In step S20, the silane coupling agent includes KH550; In step S20, the usage ratio of the boron nitride nanofibers, porous graphene and ethanol is 1-3 g: 2-4 g: 100-200 mL.

5. The method for preparing a high-performance absorbing cable according to claim 1, wherein: In step S20, the reaction temperature is 50-60° C., and the reaction time is 3-5 h; In step S20, the dispersion time is 10 to 12 hours.

6. The method for preparing a high-performance absorbing cable according to claim 1, wherein: In step S30, the ratio of the intercalation complex, ferric nitrate, ferric sulfate and water is 0.8-1.5 g: 0.5-0.8 g: 0.2-0.4 g: 100-150 mL; In step S30, the target pH value is 8 to 9; In step S30, the reaction temperature is 70-90° C., and the reaction time is 1-3 hours.

7. The method for preparing a high-performance absorbing cable according to claim 1, wherein: In step S40, the ratio of the composite powder, dopamine and buffer is 1-2 g: 0.1-0.5 g: 100-150 mL; In step S40, the pH value of the buffer solution is 8.5, the buffer comprises Tris-HCl buffer, and the concentration of the buffer is 10 mM; In step S40, the reaction temperature is 40-50° C., and the reaction time is 12-24 hours.

8. The method for preparing a high-performance absorbing cable according to claim 1, wherein: In step S50, the mass ratio of polyvinyl chloride, absorbing material, antioxidant, EPDM rubber, epoxy soybean oil, and stabilizer is 60:15-20:2-5:8-12:5-7:0.5-1; In step S50, the antioxidant includes antioxidant 1010 and / or antioxidant 168; In step S50, the stabilizer includes a calcium zinc stabilizer.

9. The method for preparing a high-performance absorbing cable according to claim 1, wherein: In step S50, the extrusion temperature is 180-190°C.

10. A high-performance microwave-absorbing cable produced by the method for producing a high-performance microwave-absorbing cable according to any one of claims 1 to 9.

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