High-temperature-resistant and corrosion-resistant wire and cable as well as preparation method and application thereof

Abstract

The invention provides a high-temperature-resistant and corrosion-resistant wire cable and a preparation method and application thereof, and belongs to the technical field of wire cables, and the high-temperature-resistant and corrosion-resistant wire cable comprises a conductor, and an insulating layer, a high-temperature-resistant layer and a corrosion-resistant layer which sequentially coat the conductor; the insulating layer is made of a blending material of polytetrafluoroethylene and polyether-ether-ketone, the high-temperature-resistant layer is made of an organic silicon resin composite material reinforced by nano ceramic particles, and the corrosion-resistant layer is made of a fluororubber material containing graphene. Through innovative design and reasonable matching of the materials of all the layers and a specific preparation process, the wire cable has excellent high-temperature resistance and corrosion resistance, and meanwhile good insulativity, conductivity and mechanical strength are guaranteed. Compared with a traditional wire cable, the cable can work stably for a long time in a high-temperature and strong-corrosion environment, the service life is prolonged, the equipment maintenance cost is reduced, and the use safety and reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wires and cables, and in particular to a high-temperature resistant and corrosion-resistant wire and cable, and a preparation method and application thereof. Background Art

[0002] In fields such as aerospace, chemical engineering, and energy, equipment often operates in extreme environments, often accompanied by high temperatures and highly corrosive media. Conventional insulation materials and protective layers used in traditional wires and cables are susceptible to softening and aging at high temperatures. When exposed to corrosive substances like acids and alkalis, their insulation performance and mechanical strength rapidly degrade, leading to cable short circuits and leakage, which not only impact equipment operation but also pose safety risks. Therefore, developing wires and cables that can operate stably in high-temperature, corrosive environments has become a pressing issue for the industry.

[0003] To this end, a high-temperature resistant and corrosion-resistant wire and cable and a preparation method and application thereof are proposed. Summary of the Invention

[0004] The present invention aims to solve the problems raised in the background technology and provides a high-temperature resistant and corrosion-resistant wire and cable and a preparation method and application thereof.

[0005] The specific technical solutions are as follows:

[0006] A high-temperature-resistant and corrosion-resistant wire and cable comprises a conductor and an insulating layer, a high-temperature-resistant layer, and a corrosion-resistant layer sequentially coated on the outside of the conductor; the insulating layer is made of a blend of polytetrafluoroethylene and polyetheretherketone, the high-temperature-resistant layer is composed of a silicone resin composite material reinforced with nano-ceramic particles, and the corrosion-resistant layer is a fluororubber material containing graphene.

[0007] A blend of polytetrafluoroethylene and polyetheretherketone is used as the insulation layer, combining the excellent chemical stability of polytetrafluoroethylene and the high-temperature performance of polyetheretherketone to improve the insulation performance and high-temperature resistance; the high-temperature resistant layer is made of a silicone resin composite material reinforced by nano-ceramic particles. The nano-ceramic particles enhance the material structure, and the silicone resin provides flexibility, so that the cable has good high-temperature resistance and mechanical properties; a fluororubber material containing graphene is used as the corrosion-resistant layer. The graphene enhances the material strength and barrier properties, and the fluororubber provides corrosion resistance, which can enhance the overall corrosion resistance of the cable.

[0008] In the aforementioned high-temperature and corrosion-resistant wire and cable, the polytetrafluoroethylene (PTFE) and polyetheretherketone (PEEK) blend comprises 60% to 80% by weight of PTFE and 20% to 40% by weight of PEEK. By carefully designing a reasonable mass ratio of PTFE to PEEK, the overall performance of the blend is optimized, further balancing insulation, high-temperature resistance, and mechanical strength.

[0009] In the aforementioned high-temperature and corrosion-resistant wire and cable, the nano-ceramic particle-reinforced silicone resin composite material has a particle size of 50-200 nm and a mass fraction of 10% to 30% in the silicone resin. By carefully designing the appropriate particle size and content of the nano-ceramic particles, they are uniformly dispersed in the silicone resin, fully exerting their reinforcing effect and improving the high-temperature resistance, wear resistance, and impact resistance of the high-temperature resistant layer.

[0010] In the aforementioned high-temperature and corrosion-resistant wire and cable, the graphene-containing fluororubber material has a mass fraction of 1% to 5%, and the fluororubber is a vinylidene fluoride-hexafluoropropylene copolymer. By determining the type and content of the graphene and fluororubber, the reinforcing and barrier properties of the graphene and the corrosion resistance of the vinylidene fluoride-hexafluoropropylene copolymer are fully utilized to effectively resist erosion by various corrosive media.

[0011] In the aforementioned high-temperature and corrosion-resistant wire and cable, the conductor is a multi-strand, twisted silver-plated copper alloy wire, and the thickness of the silver coating is 0.01 to 0.05 mm. By selecting multi-strand, twisted silver-plated copper alloy wire as the conductor, the silver coating improves electrical conductivity and oxidation resistance, while the multi-strand twisted structure enhances the cable's flexibility and mechanical strength.

[0012] The present invention also provides a method for preparing a high-temperature resistant and corrosion-resistant wire and cable, comprising the following steps:

[0013] S1: Conductor preparation: After the copper alloy wire is silver-plated, multiple strands are twisted together to form a conductor;

[0014] S2: Preparation of insulation layer: polytetrafluoroethylene and polyetheretherketone are mixed in proportion and extruded onto the conductor surface through an extruder to form an insulation layer;

[0015] S3: Preparation of high temperature resistant layer: Nano ceramic particles are dispersed in silicone resin to make a composite material, and a high temperature resistant layer is formed on the surface of the insulating layer by a coating process;

[0016] S4: Preparation of corrosion-resistant layer: The fluororubber material containing graphene is injection molded into a corrosion-resistant layer on the surface of the high-temperature resistant layer.

[0017] Specific preparation steps, from conductor preparation to layer forming, ensure that the performance of each material is fully utilized, thus guaranteeing the overall quality and performance stability of the cable.

[0018] In the aforementioned method for preparing high-temperature and corrosion-resistant wires and cables, during the insulation layer preparation step, the extrusion temperature is controlled at 300-350°C and the extrusion speed is 1-3 m / min. By controlling the temperature and speed during insulation layer preparation, uniform extrusion of the blended material can be ensured, preventing insulation layer defects caused by improper temperature and speed, and ensuring insulation performance.

[0019] In the method for preparing a high-temperature, corrosion-resistant wire and cable, in the step of preparing the high-temperature resistant layer, the nano-ceramic particles are uniformly dispersed in the silicone resin by ultrasonic dispersion, and the coating thickness is controlled to be between 0.2 and 0.5 mm. Ultrasonic dispersion of the nano-ceramic particles and control of the coating thickness of the high-temperature resistant layer ensure uniform dispersion of the nano-ceramic particles, forming a high-temperature resistant layer with stable performance.

[0020] In the aforementioned method for preparing a high-temperature, corrosion-resistant wire and cable, the injection molding temperature during the corrosion-resistant layer preparation step is 180-220°C, and the injection molding pressure is 10-15 MPa. By controlling the injection molding temperature and pressure of the corrosion-resistant layer, the fluororubber material is fully filled and molded, forming a dense, corrosion-resistant layer.

[0021] Applications of the high-temperature and corrosion-resistant wire and cable of the present invention in aerospace equipment, chemical production equipment, and high-temperature and high-pressure industrial environments. By clarifying the application of the cable in aerospace equipment, chemical production equipment, and high-temperature and high-pressure industrial environments, its advantages of high-temperature and corrosion resistance can be brought into play to meet the needs of these special fields.

[0022] The present invention has the following beneficial effects:

[0023] Through innovative design and rational combination of materials in each layer, as well as a specialized manufacturing process, this invention achieves exceptional high-temperature and corrosion resistance in wires and cables, while maintaining excellent insulation, conductivity, and mechanical strength. Compared to conventional wires and cables, these cables offer long-term, stable operation in high-temperature, highly corrosive environments, extending their service life, reducing maintenance costs, and improving safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a method for preparing a high-temperature resistant and corrosion-resistant wire and cable provided in an embodiment of the present invention;

[0025] Figure 2 A graph showing changes in insulation resistance of high-temperature and corrosion-resistant wires and cables provided in an embodiment of the present invention;

[0026] Figure 3 A graph showing the mechanical strength retention rate of high-temperature and corrosion-resistant wires and cables provided in an embodiment of the present invention;

[0027] Figure 4 This is a corrosion resistance performance curve of the high-temperature resistant and corrosion-resistant wire and cable provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0032] Reference Figure 1-4 As shown, the present invention provides the following three embodiments:

[0033] Example 1: Wires and cables for aerospace equipment

[0034] Conductor: Use copper alloy wire with a diameter of 0.1mm, which is silver-plated with a thickness of 0.02mm. Twist 19 silver-plated copper alloy wires into multiple strands to form a conductor.

[0035] Insulation layer: 70% by mass of polytetrafluoroethylene and 30% by mass of polyetheretherketone are mixed, and an insulation layer with a thickness of 0.3 mm is extruded on the surface of the conductor through an extruder at an extrusion temperature of 320°C and an extrusion speed of 2 m / min.

[0036] High temperature resistant layer: Nano ceramic particles with a particle size of 100nm are selected and dispersed in silicone resin with a mass fraction of 20%. Ultrasonic dispersion is used for 30 minutes to make them evenly dispersed, and then a high temperature resistant layer with a thickness of 0.3mm is formed on the surface of the insulating layer through a coating process.

[0037] Corrosion-resistant layer: Graphene with a content of 3% (mass fraction) is mixed with vinylidene fluoride-hexafluoropropylene copolymer fluororubber, and a corrosion-resistant layer with a thickness of 0.4 mm is formed on the surface of the high-temperature resistant layer through an injection molding process at an injection temperature of 200°C and an injection pressure of 12 MPa.

[0038] The technical effects and experimental data of this embodiment 1 are as follows:

[0039] Technical effects: In the application scenarios of aerospace equipment, the silver-plated copper alloy wire conductor effectively reduces resistance and improves conductivity efficiency. The silver-plated layer enhances antioxidant ability and ensures the stability of signal transmission. The mass ratio of polytetrafluoroethylene and polyetheretherketone in the insulation layer is 7:3, which makes it have excellent chemical stability while having good high-temperature mechanical properties, which can prevent the insulation layer from softening or cracking due to temperature changes during the operation of aviation equipment. Nano-ceramic particles with a particle size of 100nm and a mass fraction of 20% in the high-temperature resistant layer are evenly dispersed in the silicone resin to form a high-strength heat-resistant structure that can withstand high temperatures and resist airflow impact. The 3% (mass fraction) of graphene in the corrosion-resistant layer enhances the barrier properties of fluororubber, which can resist the erosion of trace corrosive gases in space.

[0040] Experimental data: After 100 hours of continuous testing in a simulated aerospace high-temperature environment (250°C), the cable insulation resistance dropped by only 3%, while the insulation resistance of ordinary cables dropped by 35%. After 72 hours of testing in a simulated space corrosive gas environment, the corrosion-resistant layer of the cable in this embodiment showed no obvious changes, while ordinary cables showed corrosion and damage. Through electrical performance testing, the signal transmission delay of this cable was only 0.1ms, far below the industry standard.

[0041] Example 2: Wires and cables for chemical production equipment

[0042] Conductor: Copper alloy wire with a diameter of 0.08mm and a silver plating thickness of 0.015mm is used. 25 silver-plated copper alloy wires are twisted together to form a conductor.

[0043] Insulation layer: The mixture is made up of 65% polytetrafluoroethylene and 35% polyetheretherketone. At an extrusion temperature of 310°C and an extrusion speed of 1.5m / min, an insulation layer with a thickness of 0.25mm is extruded.

[0044] High temperature resistant layer: Nano ceramic particles with a particle size of 80 nm are used, with a mass fraction of 15% in the silicone resin. After ultrasonic dispersion for 25 minutes, a high temperature resistant layer with a thickness of 0.25 mm is formed by coating.

[0045] Corrosion-resistant layer: A fluororubber material with a graphene content of 2% (mass fraction) is injection-molded at an injection temperature of 190° C. and an injection pressure of 11 MPa to form a corrosion-resistant layer with a thickness of 0.35 mm.

[0046] The technical effects and experimental data of this embodiment 2 are as follows:

[0047] Technical effect: Aiming at the complex corrosive environment of chemical production equipment, the silver-plated copper alloy wire conductor with a diameter of 0.08mm ensures the electrical conductivity while the multi-strand twisted structure improves the flexibility of the cable, making it easier to install and wire in the equipment; the insulation layer is made of a ratio of 65% polytetrafluoroethylene and 35% polyetheretherketone, which makes it extremely resistant to common acid and alkali chemical reagents; the 80nm nano-ceramic particles and 15% content in the high-temperature resistant layer can maintain good thermal insulation performance even at lower temperatures, preventing the heat generated by chemical reactions from affecting the internal structure of the cable; the corrosion-resistant layer of 2% (mass fraction) graphene can effectively block the penetration of various chemical media and protect the internal components of the cable.

[0048] Experimental data: After immersing the cable in a 10% by mass sulfuric acid solution for 48 hours, the insulation resistance of the cable of this embodiment remained essentially unchanged, while the insulation resistance of an ordinary cable decreased by over 60%. After continuous use for 200 hours in a chemical high-temperature environment at 180°C, the mechanical strength retention rate of the cable was 92%, while that of an ordinary cable was only 55%. Chemical resistance testing confirmed that the cable achieved the highest level of corrosion resistance to common chemical reagents.

[0049] Example 3: Wires and cables for high temperature and high pressure industrial environments

[0050] Conductor: Select copper alloy wire with a diameter of 0.12mm and a silver plating thickness of 0.03mm. 15 silver-plated copper alloy wires are twisted together to form the conductor.

[0051] Insulation layer: A mixture of 75% polytetrafluoroethylene and 25% polyetheretherketone is extruded at an extrusion temperature of 330°C and an extrusion speed of 2.5m / min to form a 0.35mm thick insulation layer.

[0052] High temperature resistant layer: Nano ceramic particles with a particle size of 150nm and a mass fraction of 25% in silicone resin are ultrasonically dispersed for 35 minutes and then coated to form a 0.4mm thick high temperature resistant layer.

[0053] Corrosion-resistant layer: A 0.5 mm thick corrosion-resistant layer is injection-molded from a fluororubber material with a graphene content of 4% (mass fraction) at an injection temperature of 210° C. and an injection pressure of 13 MPa.

[0054] The technical effects and experimental data of Example 3 are as follows:

[0055] Technical effect: The cable is suitable for high-temperature and high-pressure industrial environments. The 0.12mm diameter silver-plated copper alloy wire conductor is combined with a thicker silver plating layer, which can stably transmit large currents under high-voltage environments; the insulation layer of 75% polytetrafluoroethylene and 25% polyetheretherketone can still maintain good insulation performance and structural stability under high temperature and high pressure; the high-temperature resistant layer is reinforced with nano-ceramic particles with a particle size of 150nm and a mass fraction of 25%, which can withstand higher temperatures and is not easily deformed under high-pressure environments; the corrosion-resistant layer of 4% (mass fraction) graphene further enhances the density of the material and resists the erosion of corrosive substances under high temperature and high pressure.

[0056] Experimental data: After continuous testing for 150 hours in a high-temperature, high-pressure environment at 280°C and 10 MPa, the insulation performance of the cable of this embodiment showed no significant degradation, while ordinary cables showed breakdown. After a 72-hour salt spray corrosion test, the appearance and performance of the cable remained almost unchanged, while ordinary cables showed large areas of rust on their surfaces. Mechanical performance tests showed that the cable's tensile strength retention rate under high temperature and high pressure reached 88%, far exceeding that of ordinary cables.

[0057] It is worth mentioning that Figure 1 The preparation process of high temperature resistant and corrosion resistant wires and cables is demonstrated; Figure 2 The results show that the insulation resistance of Example 1 decreased by 3% after 100 hours at 250°C, while the insulation resistance of Examples 2 and 3 did not decrease under the same conditions, demonstrating excellent high-temperature insulation performance. Figure 3 The results show that the mechanical strength of Example 2 is retained by 92% after 200 hours at 180°C, and the mechanical strength of Example 3 is retained by 88% after 150 hours at 280°C and 10 MPa, demonstrating the good mechanical properties of the cable under high temperature and high pressure environments. Figure 4 It was shown that after immersion in 10% sulfuric acid solution for 48 hours and salt spray test for 72 hours, the performance retention percentages of the three embodiments were all 100%, indicating that the cables had excellent corrosion resistance.

[0058] Among them, the high temperature resistance comprehensive index P of the insulation layer satisfies the following equation:

[0059]

[0060] Where:

[0061] x is the mass fraction of polytetrafluoroethylene (PTFE) in the insulating layer blend material (60% ≤ x ≤ 80%);

[0062] y is the mass fraction of polyetheretherketone (PEEK) (20%≤y≤40%, and x+y=1);

[0063] T is the extrusion temperature of the insulation layer (300℃≤T≤350℃);

[0064] T_0=300℃ is the reference temperature;

[0065] is the material performance coefficient, which is determined by experimental fitting and has a range of values ​​of

[0066] α, β, λ, δ are material performance coefficients, which are determined by experimental fitting and have a range of values ​​of

[0067] α=0.8~1.2, β=1.5~2.0, λ=0.3~0.5, δ=0.2~0.4.

[0068] Take Example 1 as an example:

[0069] x = 70%, y = 30%, T = 320°C, assuming α = 1.0, β = 1.8, λ = 0.4, δ = 0.3, then:

[0070] P=1.0×0.7+1.8×0.3+0.4×0.7×0.3+0.3×320 / 300

[0071] ≈0.7+0.54+0.084+0.32=1.644.

[0072] The P value of traditional cable insulation (such as PTFE only) is about 0.9, and the value calculated by this equation is significantly higher, indicating improved high-temperature resistance.

[0073] The technical effect of this equation is as follows:

[0074] The equation can be used to predict the performance of the insulation layer under different ratios and process parameters, avoiding the traditional trial and error method and greatly improving the efficiency of formula optimization; the cross term λ·x·y in the equation reflects the synergistic effect of PTFE and PEEK, and compared with a single material, the high temperature resistance index P is significantly improved; combined with the variable of extrusion temperature T, the material performance and molding efficiency can be simultaneously optimized. For example, in Example 1, the optimal T = 320°C calculated by the equation can greatly improve the crystallinity of the insulation layer, which is significantly improved compared to the unoptimized process.

[0075] Equation working principle flow:

[0076] 1. Parameter input: Enter the target P value based on the application scenario requirements (e.g., aerospace equipment needs to withstand high temperatures of 250°C);

[0077] 2. Variable solution: Use the equation to infer the optimal x, y, and T combination. For example, if P ≥ 1.5, the solution is x ≥ 65% and T ≥ 310°C.

[0078] 3. Experimental verification: Prepare samples according to the calculated parameters and verify the high temperature resistance through thermogravimetric analysis (TGA). The error between the actual data and the equation prediction is ≤5%;

[0079] 4. Iterative optimization: Feedback experimental data into coefficients α, β, etc. to improve the prediction accuracy of the equation and form a closed-loop design of "calculation-preparation-verification".

[0080] In addition, the performance prediction of wires and cables in the existing technology mostly adopts a single material empirical formula (such as the Arrhenius equation). This equation couples the blending material ratio, process parameters and performance index, takes into account the intermolecular synergy between PTFE and PEEK, and solves the problem that traditional methods cannot quantify the interaction between different material ratios and process parameters. This equation uses the cross term λ·x·y and the temperature correction term The multivariable optimization problem of "material-process-performance" has been solved.

[0081] In summary, the high-temperature-resistant and corrosion-resistant wire and cable provided in this embodiment, as well as its preparation method and application, have the following advantages:

[0082] Through innovative design and rational matching of various material layers, as well as specialized manufacturing processes, the wires and cables possess excellent high-temperature and corrosion resistance, while maintaining excellent insulation, conductivity, and mechanical strength. Compared to traditional wires and cables, they can operate stably and long-term in high-temperature and highly corrosive environments, extending their service life, reducing equipment maintenance costs, and improving safety and reliability.

[0083] How it works

[0084] In high-temperature environments, the polytetrafluoroethylene and polyetheretherketone blend material of the insulating layer and the nano-ceramic particle reinforced silicone resin composite material of the high-temperature resistant layer, by virtue of their own high-temperature resistance and the synergistic effect between materials, prevent heat from being transferred to the conductor, thereby preventing the conductor from being damaged by high temperature; in corrosive environments, the graphene-containing fluororubber material of the corrosion-resistant layer forms a dense barrier layer to block the invasion of corrosive media and protect the internal structure; the conductor is made of silver-plated copper alloy wire to ensure good conductivity, and the multi-strand twisted structure and the protection of each layer of materials maintain the overall structural stability and mechanical properties of the cable.

[0085] How to use

[0086] According to the actual application scenario requirements, select the high-temperature and corrosion-resistant wires and cables of the present invention with appropriate specifications, connect them to the equipment circuit according to the installation method of conventional wires and cables, and stably transmit electrical energy and electrical signals in special environments such as aerospace, chemical industry, high temperature and high pressure industry, etc.

[0087] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant and corrosion resistant wire and cable, characterized in that: It includes a conductor and an insulating layer, a high-temperature resistant layer, and a corrosion-resistant layer sequentially coated on the outside of the conductor; the insulating layer is made of a blend of polytetrafluoroethylene and polyetheretherketone, the high-temperature resistant layer is composed of a silicone resin composite material reinforced with nano-ceramic particles, and the corrosion-resistant layer is a fluororubber material containing graphene.

2. The high temperature resistant and corrosion resistant wire and cable according to claim 1, characterized in that: In the blended material of polytetrafluoroethylene and polyetheretherketone, the mass proportion of polytetrafluoroethylene is 60% to 80%, and the mass proportion of polyetheretherketone is 20% to 40%.

3. The high temperature resistant and corrosion resistant wire and cable according to claim 1, characterized in that: In the nano-ceramic particle reinforced organic silicon resin composite material, the particle size of the nano-ceramic particles is 50-200 nm, and the mass fraction of the nano-ceramic particles in the organic silicon resin is 10% to 30%.

4. The high temperature resistant and corrosion resistant wire and cable according to claim 1, characterized in that: In the fluororubber material containing graphene, the mass fraction of graphene is 1% to 5%, and the fluororubber is a vinylidene fluoride-hexafluoropropylene copolymer.

5. The high temperature resistant and corrosion resistant wire and cable according to claim 1, characterized in that: The conductor is a multi-strand twisted silver-plated copper alloy wire, and the thickness of the silver-plated layer is 0.01-0.05 mm.

6. A method for preparing a high temperature resistant and corrosion resistant wire and cable according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Conductor preparation: After the copper alloy wire is silver-plated, multiple strands are twisted together to form a conductor; S2: Preparation of insulation layer: polytetrafluoroethylene and polyetheretherketone are mixed in proportion and extruded onto the conductor surface through an extruder to form an insulation layer; S3: Preparation of high temperature resistant layer: Nano ceramic particles are dispersed in silicone resin to make a composite material, and a high temperature resistant layer is formed on the surface of the insulating layer by a coating process; S4: Preparation of corrosion-resistant layer: The fluororubber material containing graphene is injection molded into a corrosion-resistant layer on the surface of the high-temperature resistant layer.

7. The method for preparing a high temperature resistant and corrosion resistant wire and cable according to claim 6, characterized in that: In the insulating layer preparation step, the extrusion temperature is controlled at 300-350° C., and the extrusion speed is 1-3 m / min.

8. The method for preparing high temperature resistant and corrosion resistant wire and cable according to claim 6, characterized in that: In the step of preparing the high-temperature resistant layer, the nano-ceramic particles are uniformly dispersed in the silicone resin by ultrasonic dispersion, and the coating thickness is controlled to be 0.2 to 0.5 mm.

9. The method for preparing a high temperature resistant and corrosion resistant wire and cable according to claim 6, characterized in that: In the corrosion-resistant layer preparation step, the injection molding temperature is 180-220° C., and the injection molding pressure is 10-15 MPa.

10. Application of the high temperature resistant and corrosion resistant wire and cable according to any one of claims 1 to 5 in aerospace equipment, chemical production equipment, and high temperature and high pressure industrial environments.

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