Anti-corrosion copper conductor cable and its preparation method and application

Abstract

The present application relates to the field of cable technology. Specifically, it relates to an anti-corrosion copper conductor cable, its preparation method and application. The preparation method of the anti-corrosion copper conductor cable provided in the present application comprises the following steps: subjecting a semi-conductive nylon material to plasma treatment to prepare a modified semi-conductive nylon material; the process parameters of the plasma treatment include: an oxygen flow rate of 20sccm~100sccm, and a working pressure of 1Pa~10Pa; coating the modified semi-conductive nylon material on the outer surface of the copper conductor to prepare a modified layer; coating the outer surface of the modified layer with a semi-conductive shielding layer to prepare the anti-corrosion copper conductor cable; wherein the semi-conductive shielding layer comprises conductive carbon black. The preparation method provided in the present application can effectively prevent the active sulfur in the semi-conductive shielding layer from migrating to the surface of the copper conductor, prevent sulfur from corroding the copper conductor, and thereby improve the reliability of the cable and extend the service life of the cable.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to an anti-corrosion copper conductor cable and a preparation method and application thereof. Background Art

[0002] Cables play a vital role in long-distance power transmission, urban grid interconnection, and interregional power grids. They typically consist of an inner copper conductor, coated with a semi-conductive nylon tape and a semi-conductive shielding layer. The tape prevents the semi-conductive shielding material from penetrating the copper conductor during the extrusion process and, together with the extruded shielding layer, forms a conductor shield. To evenly distribute the electric field and improve conductivity, conductive carbon black is traditionally added to the semi-conductive shielding layer.

[0003] The raw materials for conductive carbon black are coal tar, anthracene oil, and carbon black oil. These raw materials are derived from coal and petroleum processing. Coal and petroleum naturally contain sulfur, which is not completely removed during the production process. Therefore, sulfur will be present in the produced conductive carbon black. The sulfur in conductive carbon black mainly exists in the form of elemental sulfur, organic sulfur, and inorganic sulfur. During cable operation, the maximum operating temperature can reach 90°C. At this time, the organic sulfur contained in the semi-conductive shielding layer easily migrates to the conductor layer, reacting chemically with the copper conductor to form Cu2S, which corrodes the copper conductor and significantly affects the electric field distribution of the semi-conductive shielding layer, reducing the service life of the cable. Summary of the Invention

[0004] Based on this, the present application provides a corrosion-resistant copper conductor cable and its preparation method and application. The preparation method of the corrosion-resistant copper conductor cable provided in the present application can effectively reduce the corrosion effect of sulfur in the conductive carbon black of the semi-conductive shielding layer on the copper conductor by pretreating the semi-conductive nylon material.

[0005] In a first aspect of the present application, a method for preparing a corrosion-resistant copper conductor cable is provided, comprising the following steps:

[0006] The semi-conductive nylon material is subjected to plasma treatment to prepare a modified semi-conductive nylon material; the process parameters of the plasma treatment include: an oxygen flow rate of 20 sccm to 100 sccm, and a working pressure of 1 Pa to 10 Pa;

[0007] coating the modified semi-conductive nylon material on the outer surface of the copper conductor to prepare a modified layer;

[0008] The outer surface of the modified layer is coated with a semiconductive shielding layer to prepare the corrosion-resistant copper conductor cable; wherein the semiconductive shielding layer comprises conductive carbon black.

[0009] In one embodiment, the power of the plasma treatment is 50W~200W.

[0010] In one embodiment, the plasma treatment time is 30s~300s.

[0011] In one embodiment, the semi-conductive nylon material includes one or more of nylon 11 resin, nylon 6 resin and nylon 1010 resin.

[0012] In one embodiment, the modified semi-conductive nylon material is coated on the outer surface of the copper conductor by wrapping, and the gap ratio of the modified semi-conductive nylon material wrapping is 20% to 30%.

[0013] In one embodiment, the mass percentage of sulfur in the conductive carbon black is ≥0.5%.

[0014] In one embodiment, before the step of subjecting the semi-conductive nylon material to plasma treatment, the step of cleaning the semi-conductive nylon material is also included:

[0015] The surface of the semi-conductive nylon material is cleaned with a cleaning agent, wherein the cleaning agent includes one or more of citric acid, acetic acid, ethanol and isopropyl alcohol.

[0016] In one embodiment, the semiconductive shielding layer further includes a matrix resin, a cross-linking agent, and a coupling agent.

[0017] The second aspect of the present application provides an anti-corrosion copper conductor cable, which is prepared by the preparation method described in any embodiment of the first aspect of the present application; the anti-corrosion copper conductor cable includes a copper conductor and a modified layer and a semi-conductive shielding layer sequentially stacked on the surface of the copper conductor.

[0018] In one embodiment, the corrosion-resistant copper conductor cable is an ultra-high voltage cable, wherein the voltage value of the ultra-high voltage cable is 275 kV to 800 kV.

[0019] The third aspect of the present application provides an application of the corrosion-resistant copper conductor cable described in the second aspect of the present application in power transmission.

[0020] In the method for preparing a corrosion-resistant copper conductor cable provided in the present application, by limiting the process parameters of the plasma treatment, such as the oxygen flow rate and the working pressure, the active oxygen generated by the plasma treatment can oxidize the semi-conductive nylon material, so that the surface of the modified semi-conductive nylon material after treatment is enriched with highly oxidizing peroxide structures, hydroxyl groups (-OH), carboxyl groups (-COOH) and other oxygen-containing functional groups.

[0021] A modified semi-conductive nylon material is used as a modified layer, and a semi-conductive shielding layer is provided on the surface of the modified layer. At this time, the peroxide on the surface of the modified semi-conductive nylon material can undergo an oxidation reaction with the organic sulfur present in the conductive carbon black, such as the thiol group (-SH), to produce sulfide (RSR), disulfide (RSSR), disulfide or sulfide with a higher oxidation state; in addition, the oxygen-containing functional groups such as hydroxyl (-OH) and carboxyl (-COOH) on the surface of the modified semi-conductive nylon material can also undergo coupling reaction or addition reaction with the thiol group to form a stable covalent bond, thereby reducing the reactivity of sulfur.

[0022] Therefore, the present application performs oxygen plasma treatment on the semi-conductive nylon material and wraps the modified semi-conductive nylon material into a modified layer and arranges it between the copper conductor and the semi-conductive shielding layer. This can effectively prevent the active sulfur in the semi-conductive shielding layer from migrating to the surface of the copper conductor, effectively prevent sulfur from corroding the copper conductor, and thus improve the reliability of the cable and extend the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a diagram showing the generation of the modified semi-conductive nylon material provided in this application, and the reaction mechanism of the modified semi-conductive nylon material with the organic sulfur in the semi-conductive shielding layer. DETAILED DESCRIPTION

[0024] The following, in conjunction with specific examples, provides a further complete and clear description of the corrosion-resistant copper conductor cable, its preparation method, and its applications. The present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure herein.

[0025] In addition, in the description of the present application, “a plurality of” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] In this application, "at least one" means more than one, such as one, two, or more than two. "Multiple" or "several" means at least two, such as two, three, etc., and "multi-layer" means at least two layers, such as two, three, etc., unless otherwise specifically defined. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise specifically defined.

[0028] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe a feature or characteristic, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein are understood to include any and all subranges subsumed therein.

[0029] In a first aspect of the present application, a method for preparing a corrosion-resistant copper conductor cable is provided, comprising the following steps:

[0030] The semi-conductive nylon material is subjected to plasma treatment to prepare a modified semi-conductive nylon material; the process parameters of the plasma treatment include: an oxygen flow rate of 20 sccm to 100 sccm, and a working pressure of 1 Pa to 10 Pa;

[0031] coating the modified semi-conductive nylon material on the outer surface of the copper conductor to prepare a modified layer;

[0032] The outer surface of the modified layer is coated with a semiconductive shielding layer to prepare the corrosion-resistant copper conductor cable; wherein the semiconductive shielding layer comprises conductive carbon black.

[0033] See Figure 1 In the cable preparation method provided in the present application, by limiting the process parameters of plasma treatment such as oxygen flow rate, working pressure, etc., the active oxygen generated by the plasma treatment can oxidize the semi-conductive nylon material, so that the surface of the treated modified semi-conductive nylon material is enriched with highly oxidizing peroxide structures, hydroxyl groups (-OH), carboxyl groups (-COOH) and other oxygen-containing functional groups.

[0034] A modified semi-conductive nylon material is used as a modified layer, and a semi-conductive shielding layer is provided on the surface of the modified layer. At this time, the peroxide on the surface of the modified semi-conductive nylon material can undergo an oxidation reaction with the organic sulfur present in the conductive carbon black, such as the thiol group (-SH), to produce sulfide (RSR), disulfide (RSSR), disulfide or sulfide with a higher oxidation state; in addition, the oxygen-containing functional groups such as hydroxyl (-OH) and carboxyl (-COOH) on the surface of the modified semi-conductive nylon material can also undergo coupling reaction or addition reaction with the thiol group to form a stable covalent bond, thereby reducing the reactivity of sulfur.

[0035] Therefore, the present application performs oxygen plasma treatment on the semi-conductive nylon material and wraps the modified semi-conductive nylon material into a modified layer and arranges it between the copper conductor and the semi-conductive shielding layer. This can effectively prevent the active sulfur in the semi-conductive shielding layer from migrating to the surface of the copper conductor, effectively prevent sulfur from corroding the copper conductor, and thus improve the reliability of the cable and extend the service life of the cable.

[0036] Appropriate oxygen flow rate can effectively activate the surface of the semi-conductive nylon material to introduce oxygen-containing functional groups such as hydroxyl and carboxyl. It can effectively avoid the low processing efficiency caused by too low oxygen flow rate and the shortcomings of insignificant surface modification effect. On the other hand, it can also avoid the excessive peeling of the surface atomic layer caused by too high oxygen flow rate, thereby effectively avoiding the destruction and damage of the material surface structure. It is understandable that in the step of plasma treatment, the oxygen flow rate can be selected from any value between 20 sccm and 100 sccm. Specifically, the oxygen flow rate includes but is not limited to 20 sccm, 30 sccm, 40 sccm, 45 sccm, 48 sccm, 49 sccm, 50 sccm, 51 sccm, 52 sccm, 55 sccm, 60 sccm, 70 sccm, 80 sccm, 90 sccm, 95 sccm, 98 sccm, 99 sccm or 100 sccm.

[0037] To avoid the physical impact and collision caused by high working pressure on the surface of the semi-conductive nylon material; and the disadvantage that a large number of particles are deposited on the surface of the semi-conductive nylon material due to low working pressure, which cannot be effectively oxidized. In this application, in the step of plasma treatment, the working pressure is 1Pa~10Pa. It can be understood that the working pressure can be selected from any value between 1Pa~10Pa. Specifically, in the step of plasma treatment, the working pressure includes but is not limited to 1Pa, 2Pa, 3Pa, 4Pa, 5Pa, 6Pa, 7Pa, 8Pa, 9Pa or 10Pa.

[0038] Appropriate power will ensure the density and activity of the plasma reaction material and ensure the processing efficiency. In one example, the power of the plasma treatment is 50W~200W. It is understandable that the power of the plasma treatment can be selected from any value between 50W~200W. Specifically, the power of the plasma treatment includes but is not limited to 50W, 51W, 52W, 55W, 58W, 60W, 70W, 80W, 90W, 95W, 98W, 99W, 100W, 101W, 102W, 105W, 110W, 120W, 130W, 140W, 145W, 148W, 149W or 150W.

[0039] In one example, the plasma treatment time is 30s to 300s. It is understandable that the plasma treatment time can be selected from any value between 30s and 300s. Specifically, the plasma treatment time includes but is not limited to 30s, 31s, 35s, 40s, 45s, 48s, 49s, 50s, 60s, 70s, 80s, 90s, 100s, 110s, 120s, 130s, 140s, 145s, 148s, 149s, 150s, 151s, 155s, 160s, 180s, 200s, 220s, 240s, 280s or 300s.

[0040] Semi-conductive nylon material is a polyamide resin, which refers to a general term for thermoplastic resins containing repeating amide groups - [NHCO] - on the main chain of the molecule, including aliphatic polyamide resins, aliphatic-aromatic polyamide resins and aromatic polyamide resins.

[0041] In one example, the semiconductive nylon material includes one or more of nylon 11 resin, nylon 6 resin, and nylon 1010 resin. Nylon 11 resin, also known as poly(ω-aminoundecanoyl), is obtained by the polycondensation of ω-aminoundecanoic acid. Nylon 6 resin, whose monomer is caprolactam, is a polymer compound formed by the polymerization of caprolactam. Nylon 1010 resin, also known as poly(decanediamine sebacamide), is obtained by the polycondensation of sebacic acid.

[0042] In one example, the modified semi-conductive nylon material is coated on the outer surface of the copper conductor by wrapping, and the gap ratio of the modified semi-conductive nylon material wrapping is 20% to 30%.

[0043] Wrapping refers to the process of wrapping a modified semi-conductive nylon material around a copper conductor. The wrapping gap ratio is defined as the total gap area between the wrapping materials divided by the total wrapping material area multiplied by 100%. Specifically, the wrapping gap ratio includes, but is not limited to, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, or 30%.

[0044] Specifically, in this application, the specific steps of wrapping the modified semi-conductive nylon material around the outer surface of the copper conductor are:

[0045] The modified semi-conductive nylon material is wrapped around the surface of the copper conductor in a right-hand double-layer gap, and the wrapping gap rate of the modified semi-conductive nylon material is 20% to 30%.

[0046] In one example, the mass percentage of sulfur in the conductive carbon black is ≥ 0.5%. It is understood that the mass percentage of sulfur refers to the total sulfur content in the conductive carbon black, including different forms of sulfur such as elemental sulfur, inorganic sulfur, and organic sulfur. The sulfur content can be determined using methods such as the Askar method, coulometric titration, and high-temperature combustion neutralization method.

[0047] In one specific example, the mass percentage of sulfur in the conductive carbon black is 0.5% to 2%. Specifically, the mass percentage of sulfur in the conductive carbon black includes but is not limited to 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.8%, or 2%.

[0048] In one example, before the step of subjecting the semi-conductive nylon material to plasma treatment, the step of cleaning the semi-conductive nylon material is also included:

[0049] The surface of the semi-conductive nylon material is cleaned with a cleaning agent, wherein the cleaning agent includes one or more of citric acid, acetic acid, ethanol and isopropyl alcohol.

[0050] The cleaning agent can remove dirt on the surface of the semi-conductive nylon material without leaving obvious residue after cleaning, thereby providing a clean surface for plasma treatment.

[0051] In one specific example, the method for preparing the corrosion-resistant copper conductor cable comprises the following steps:

[0052] S10, cleaning the surface of the semi-conductive nylon material with a cleaning agent, wherein the cleaning agent includes one or more of citric acid, acetic acid, ethanol, and isopropyl alcohol;

[0053] S20, placing the cleaned semi-conductive nylon material in a plasma treatment chamber for plasma treatment, wherein the process parameters of the plasma treatment include: an oxygen flow rate of 20 sccm to 100 sccm, a working pressure of 1 Pa to 10 Pa, a power of 50 W to 200 W, and a time of 30 s to 300 s. After the plasma treatment is completed, the material is cooled to room temperature to prepare a modified semi-conductive nylon material;

[0054] S30, wrapping the modified semi-conductive nylon material around the surface of the copper conductor in a right-handed double-layer gap pattern, wherein the gap ratio of the modified semi-conductive nylon material is 20% to 30%, to prepare a modified layer;

[0055] S40, extruding a semi-conductive shielding layer on the surface of the modified layer to prepare the corrosion-resistant copper conductor cable.

[0056] In one example, to facilitate wrapping of the modified semi-conductive nylon material, the modified semi-conductive nylon material is a modified semi-conductive nylon tape. The semi-conductive nylon material is a semi-conductive nylon tape.

[0057] In one example, the conductive carbon black is prepared from raw materials including one or more of coal tar, anthracene oil, and carbon black oil. Preferably, the conductive carbon black is prepared from anthracene oil. Anthracene oil is relatively pure, contains fewer impurities, and has a relatively low sulfur content, which helps reduce the sulfur content in the conductive carbon black.

[0058] In one example, the semiconductive shielding layer further includes a matrix resin, a cross-linking agent, and a coupling agent.

[0059] Optionally, the matrix resin is one or more of ethylene-vinyl acetate copolymer (EVA), ethylene-butyl acrylate copolymer (EBA) and ethylene-ethyl acrylate copolymer (EEA). Preferably, the matrix resin is ethylene-butyl acrylate copolymer EBA.

[0060] Optionally, the cross-linking agent is one or more of di-tert-butylperoxyisopropylbenzene (BIPB) and dicumyl peroxide (DCP).

[0061] Optionally, the coupling agent is one or more of KH550, KH560 and KH792. Preferably, the silane coupling agent is KH550.

[0062] In one example, the semiconductive shielding layer further includes one or more of an antioxidant, a lubricant, and a dispersant.

[0063] Optionally, the antioxidant is one or more of the antioxidant 300 , the antioxidant 1010 , and the antioxidant 168 .

[0064] Optionally, the lubricant is one or more of zinc stearate and pentaerythritol.

[0065] Optionally, the dispersant is one or more of ethylene bisstearamide (EBS) and oleamide.

[0066] The second aspect of the present application provides an anti-corrosion copper conductor cable, which is prepared by the preparation method described in any example of the first aspect of the present application; the anti-corrosion copper conductor cable includes a copper conductor and a modified layer and a semi-conductive shielding layer sequentially stacked on the surface of the copper conductor.

[0067] In one example, the cable is an ultra-high voltage cable, and the voltage of the ultra-high voltage cable is 275 kV to 800 kV.

[0068] The third aspect of the present application provides an application of the corrosion-resistant copper conductor cable described in the second aspect of the present application in power transmission.

[0069] The following further specific examples are provided to illustrate the present application in detail. It should also be understood that the following examples are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present application belong to the scope of protection of the present application. The specific process parameters and the like in the following embodiments are only examples within a suitable range, that is, those skilled in the art can make a selection within a suitable range through the description herein, and are not necessarily limited to the specific values ​​of the embodiments below.

[0070] Example 1

[0071] Example 1 provides an anti-corrosion copper conductor cable and a preparation method thereof, comprising the following steps:

[0072] (1) The semi-conductive nylon belt material is made of nylon 11 resin. Use a dust-free cloth and citric acid to clean the surface of the semi-conductive nylon belt material and dry it;

[0073] (2) The cleaned semi-conductive nylon tape material is evenly laid and placed in a plasma treatment chamber for plasma treatment. The process parameters of the plasma treatment include: an oxygen flow rate of 50 sccm, a working pressure of 5 Pa, a power of 100 W, and a time of 180 s. After the plasma treatment is completed, the material is cooled to room temperature to prepare a modified semi-conductive nylon material;

[0074] (3) Wrapping the modified semi-conductive nylon material on the surface of the copper conductor with a right-hand double-layer gap, wherein the wrapping gap ratio of the modified semi-conductive nylon material is 25%, to prepare a modified layer;

[0075] (4) A semi-conductive shielding layer is extruded on the surface of the modified layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 0.8%, and the corrosion-resistant copper conductor cable is prepared.

[0076] Example 2

[0077] Example 2 provides an anti-corrosion copper conductor cable and a preparation method thereof, comprising the following steps:

[0078] (1) The semi-conductive nylon belt material is made of nylon 6 resin. Use a dust-free cloth and isopropyl alcohol to clean the surface of the semi-conductive nylon belt material and dry it;

[0079] (2) The cleaned semi-conductive nylon tape material is evenly laid and placed in a plasma treatment chamber for plasma treatment. The process parameters of the plasma treatment include: an oxygen flow rate of 100 sccm, a working pressure of 10 Pa, a power of 150 W, and a time of 300 s. After the plasma treatment is completed, the material is cooled to room temperature to prepare a modified semi-conductive nylon material;

[0080] (3) Wrapping the modified semi-conductive nylon material on the surface of the copper conductor with a right-hand double-layer gap, wherein the wrapping gap ratio of the modified semi-conductive nylon material is 20%, to prepare a modified layer;

[0081] (4) A semi-conductive shielding layer is extruded on the surface of the modified layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 0.6%, and the corrosion-resistant copper conductor cable is prepared.

[0082] Example 3

[0083] Example 3 provides an anti-corrosion copper conductor cable and a preparation method thereof, comprising the following steps:

[0084] (1) The semi-conductive nylon belt material is made of nylon 1010 resin. Use a dust-free cloth and ethanol to clean the surface of the semi-conductive nylon belt material and dry it;

[0085] (2) The cleaned semi-conductive nylon tape material is evenly laid and placed in a plasma treatment chamber for plasma treatment. The process parameters of the plasma treatment include: an oxygen flow rate of 20 sccm, a working pressure of 1 Pa, a power of 50 W, and a time of 30 s. After the plasma treatment is completed, the material is cooled to room temperature to prepare a modified semi-conductive nylon material;

[0086] (3) Wrapping the modified semi-conductive nylon material on the surface of the copper conductor with a right-hand double-layer gap, wherein the wrapping gap ratio of the modified semi-conductive nylon material is 30%, to prepare a modified layer;

[0087] (4) A semi-conductive shielding layer is extruded on the surface of the modified layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 0.5%, and the corrosion-resistant copper conductor cable is prepared.

[0088] Example 4

[0089] Example 4 provides an anti-corrosion copper conductor cable and a preparation method thereof, comprising the following steps:

[0090] (1) The semi-conductive nylon belt material is made of nylon 1010 resin. Use a dust-free cloth and ethanol to clean the surface of the semi-conductive nylon belt material and dry it;

[0091] (2) The cleaned semi-conductive nylon tape material is evenly laid and placed in a plasma treatment chamber for plasma treatment. The process parameters of the plasma treatment include: an oxygen flow rate of 50 sccm, a working pressure of 5 Pa, a power of 100 W, and a time of 150 s. After the plasma treatment is completed, the material is cooled to room temperature to prepare a modified semi-conductive nylon material;

[0092] (3) Wrapping the modified semi-conductive nylon material on the surface of the copper conductor with a right-hand double-layer gap, wherein the wrapping gap ratio of the modified semi-conductive nylon material is 25%, to prepare a modified layer;

[0093] (4) A semi-conductive shielding layer is extruded on the surface of the modified layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 1.5%, and the corrosion-resistant copper conductor cable is prepared.

[0094] Comparative Example 1

[0095] Comparative Example 1 provides a cable and a preparation method thereof, comprising the following steps:

[0096] (1) The semi-conductive nylon tape material is made of nylon 1010 resin, and the semi-conductive nylon material is wrapped around the surface of the copper conductor with a right-hand double-layer gap, and the wrapping gap rate of the semi-conductive nylon material is 30% to prepare a wrapping layer;

[0097] (2) A semi-conductive shielding layer is extruded on the surface of the sheathing layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 0.5%, and the cable is prepared.

[0098] Comparative Example 2

[0099] Comparative Example 2 provides a cable and a preparation method thereof, comprising the following steps:

[0100] (1) The semi-conductive nylon belt material is made of nylon 1010 resin. Use a dust-free cloth and ethanol to clean the surface of the semi-conductive nylon belt material and dry it;

[0101] (2) Wrapping the cleaned semi-conductive nylon material around the surface of the copper conductor with a right-hand double-layer gap, wherein the wrapping gap ratio of the semi-conductive nylon material is 30%, to prepare a wrapping layer;

[0102] (4) A semi-conductive shielding layer is extruded on the surface of the sheathing layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 1.5%, and the cable is prepared.

[0103] Comparative Example 3

[0104] Comparative Example 3 provides a cable and a preparation method thereof, comprising the following steps:

[0105] (1) The semi-conductive nylon belt material is made of nylon 6 resin. Use a dust-free cloth and isopropyl alcohol to clean the surface of the semi-conductive nylon belt material and dry it;

[0106] (2) The cleaned semi-conductive nylon tape material is evenly laid and placed in a plasma treatment chamber for plasma treatment. The process parameters of the plasma treatment include: an oxygen flow rate of 10 sccm, a working pressure of 10 Pa, a power of 150 W, and a time of 300 s. After the plasma treatment is completed, the material is cooled to room temperature to prepare a modified semi-conductive nylon material;

[0107] (3) Wrapping the modified semi-conductive nylon material on the surface of the copper conductor with a right-hand double-layer gap, wherein the wrapping gap ratio of the modified semi-conductive nylon material is 20%, to prepare a modified layer;

[0108] (4) A semi-conductive shielding layer is extruded on the surface of the modified layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 0.6%, and the cable is prepared.

[0109] Comparative Example 4

[0110] Comparative Example 4 provides a cable and a preparation method thereof, comprising the following steps:

[0111] (1) The semi-conductive nylon belt material is made of nylon 6 resin. Use a dust-free cloth and isopropyl alcohol to clean the surface of the semi-conductive nylon belt material and dry it;

[0112] (2) The cleaned semi-conductive nylon tape material is evenly laid and placed in a plasma treatment chamber for plasma treatment. The process parameters of the plasma treatment include: an oxygen flow rate of 100 sccm, a working pressure of 20 Pa, a power of 150 W, and a time of 300 s. After the plasma treatment is completed, the material is cooled to room temperature to prepare a modified semi-conductive nylon material;

[0113] (3) Wrapping the modified semi-conductive nylon material on the surface of the copper conductor with a right-hand double-layer gap, wherein the wrapping gap ratio of the modified semi-conductive nylon material is 20%, to prepare a modified layer;

[0114] (4) A semi-conductive shielding layer is extruded on the surface of the modified layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 0.6%, and the cable is prepared.

[0115] Test Case

[0116] The cables obtained in the Examples and Comparative Examples were placed in an oven at 130°C for accelerated aging for 72 hours. The copper conductors were then stripped and compared with the ASTM D 130 / TP 154 standard color chart for the detection of corrosive sulfur. The degree of corrosion of the copper conductors is shown in Table 1 below. In the table, 1a and 1b indicate slight discoloration; 2a and 2b indicate slightly severe discoloration; and 3a and 3b indicate severe discoloration.

[0117] Table 1

[0118]

[0119] As shown in Table 1, the preparation method provided herein utilizes plasma treatment of semi-conductive nylon tape material. Based on optimized plasma treatment process parameters, the semi-conductive nylon tape material is cleaned with a cleaning agent. This effectively modifies the semi-conductive nylon tape material and effectively reduces the migration and reactivity of organic sulfur, demonstrating excellent corrosion protection for copper conductors. Comparative Examples 1 and 2, which were not plasma treated, resulted in corrosion levels of 3a and 3b, respectively, indicating relatively severe corrosion. Comparative Examples 3 and 4, which were plasma treated, but with slightly lower oxygen flow rates or higher operating pressures, failed to modify the semi-conductive nylon material. The corresponding cables exhibited corrosion levels of 2b, indicating more severe corrosion compared to the examples.

[0120] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The embodiments described above only express several implementation methods of the present application, which are convenient for understanding the technical solutions of the present application in a specific and detailed manner, but they cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several variations and improvements can be made, which all fall within the scope of protection of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the scope of protection of the claims attached to the present application. Therefore, the scope of protection of the patent of this application shall be based on the content of the attached claims, and the description can be used to interpret the content of the claims.

Claims

1. A method for preparing a corrosion-resistant copper conductor cable, characterized in that: The following steps are involved: The semi-conductive nylon material is subjected to plasma treatment to prepare a modified semi-conductive nylon material; The process parameters of the plasma treatment include: oxygen flow rate of 20 sccm~100 sccm, working pressure of 1 Pa~10 Pa, power of 50 W~200 W, and time of 30 s~300 s; coating the modified semi-conductive nylon material on the outer surface of the copper conductor to prepare a modified layer; The outer surface of the modified layer is coated with a semiconductive shielding layer to prepare the corrosion-resistant copper conductor cable; wherein the semiconductive shielding layer comprises conductive carbon black.

2. The method for preparing the corrosion-resistant copper conductor cable according to claim 1, characterized in that: The semi-conductive nylon material includes one or more of nylon 11 resin, nylon 6 resin and nylon 1010 resin.

3. The method for preparing the corrosion-resistant copper conductor cable according to claim 1, characterized in that: The specific method of coating the modified semi-conductive nylon material on the outer surface of the copper conductor is wrapping, and the wrapping gap rate of the modified semi-conductive nylon material is 20% to 30%.

4. The method for preparing the corrosion-resistant copper conductor cable according to any one of claims 1 to 3, characterized in that: The mass percentage of sulfur in the conductive carbon black is ≥0.5%.

5. The method for preparing the corrosion-resistant copper conductor cable according to any one of claims 1 to 3, characterized in that: Before the step of subjecting the semi-conductive nylon material to plasma treatment, the method further includes the step of cleaning the semi-conductive nylon material: The surface of the semi-conductive nylon material is cleaned with a cleaning agent, wherein the cleaning agent includes one or more of citric acid, acetic acid, ethanol and isopropyl alcohol.

6. The method for preparing the corrosion-resistant copper conductor cable according to any one of claims 1 to 3, characterized in that: The semiconductive shielding layer further comprises a matrix resin, a crosslinking agent and a coupling agent.

7. A corrosion-resistant copper conductor cable, characterized in that: The anti-corrosion copper conductor cable is prepared by the preparation method according to any one of claims 1 to 6; the anti-corrosion copper conductor cable comprises a copper conductor and a modified layer and a semi-conductive shielding layer sequentially stacked on the surface of the copper conductor.

8. The corrosion-resistant copper conductor cable according to claim 7, characterized in that: The corrosion-resistant copper conductor cable is an ultra-high voltage cable, wherein the voltage value of the ultra-high voltage cable is 275 kV to 800 kV.

9. Use of the corrosion-resistant copper conductor cable according to claim 7 or 8 in power transmission.

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