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

Abstract

The invention relates to the technical field of cables. The invention particularly relates to an anti-corrosion copper conductor cable and a preparation method and application thereof. The preparation method of the anti-corrosion copper conductor cable provided by the invention comprises the following steps: performing plasma treatment on a semi-conductive nylon material to prepare a modified semi-conductive nylon material; the process parameters of the plasma treatment are as follows: the oxygen flow is 20 sccm to 100 sccm, and the working pressure is 1 Pa to 10 Pa; coating the modified semi-conductive nylon material on the outer surface of a copper conductor to prepare a modified layer; and 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. According to the preparation method provided by the invention, active sulfur in the semi-conductive shielding layer can be effectively prevented from being migrated to the surface of the copper conductor, corrosion of sulfur to the copper conductor is prevented, the reliability of the cable can be improved, and the service life of the cable is prolonged.

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 an important role in long-distance power transmission, urban power grids and cross-regional power grid interconnection. Cables are usually composed of an internal copper conductor and a semi-conductive nylon tape and a semi-conductive shielding layer wrapped on the surface of the copper conductor. The semi-conductive nylon tape is used to prevent the semi-conductive shielding material from penetrating into the gap between the copper conductors during the extrusion process, and together with the extruded shielding layer, it forms a conductor shield. In order to evenly distribute the electric field and improve conductivity, conductive carbon black is added to the semi-conductive shielding layer in the traditional method.

[0003] The raw oils for conductive carbon black are coal tar, anthracene oil, and carbon black oil. The above raw oils are derived from the processing of coal and petroleum. Coal and petroleum naturally contain sulfur, which is not completely removed during the preparation process. Therefore, sulfur will be present in the prepared conductive carbon black. The sulfur element in conductive carbon black mainly exists in the form of elemental sulfur, organic sulfur, and inorganic sulfur. During the operation of the cable, its 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, reacts chemically with the copper conductor to generate Cu2S, 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 by 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] The modified semi-conductive nylon material is coated on the outer surface of the copper conductor to prepare a modified layer;

[0008] The anti-corrosion copper conductor cable is prepared by coating the outer surface of the modified layer with a semi-conductive shielding layer, wherein the semi-conductive 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 of the embodiments, the specific method of coating the modified semi-conductive nylon material on the outer surface of the copper conductor is wrapping, and the gap rate of the modified semi-conductive nylon material wrapping is 20% to 30%.

[0013] In one of the embodiments, 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 base 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 semiconductive 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 the corrosion-resistant copper conductor cable provided in the present application, by limiting the process parameters of the 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 modified semi-conductive nylon material after treatment is enriched with strongly oxidizing peroxide structures, hydroxyl groups (-OH), carboxyl groups (-COOH) and other oxygen-containing functional groups.

[0021] The modified semi-conductive nylon material is used as a modified layer, and a semi-conductive shielding layer is arranged 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 organic sulfur such as thiol group (-SH) present in the conductive carbon black to produce sulfide (RSR), disulfide (RSSR), disulfide or sulfide with a higher oxidation state; in addition, oxygen-containing functional groups such as hydroxyl group (-OH) and carboxyl group (-COOH) on the surface of the modified semi-conductive nylon material can also undergo a coupling reaction or an 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, and can effectively prevent sulfur from corroding the copper conductor, thereby improving the reliability of the cable and extending the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention provides the generation of the modified semi-conductive nylon material and the reaction mechanism diagram of the modified semi-conductive nylon material and the organic sulfur in the semi-conductive shielding layer. DETAILED DESCRIPTION

[0024] The following is a further complete and clear description of the anti-corrosion copper conductor cable and its preparation method and application of the present application in conjunction with specific embodiments. The present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0025] In addition, in the description of the present application, “plurality” 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 those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

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

[0028] When a numerical range is disclosed herein, the above range is considered to be 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 features or characteristics, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all subranges included 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] The modified semi-conductive nylon material is coated on the outer surface of the copper conductor to prepare a modified layer;

[0032] The anti-corrosion copper conductor cable is prepared by coating the outer surface of the modified layer with a semi-conductive shielding layer, wherein the semi-conductive shielding layer comprises conductive carbon black.

[0033] See also 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 modified semi-conductive nylon material after treatment is enriched with strongly oxidizing peroxide structures, hydroxyl groups (-OH), carboxyl groups (-COOH) and other oxygen-containing functional groups.

[0034] The modified semi-conductive nylon material is used as a modified layer, and a semi-conductive shielding layer is arranged 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 organic sulfur such as thiol group (-SH) present in the conductive carbon black to produce sulfide (RSR), disulfide (RSSR), disulfide or sulfide with a higher oxidation state; in addition, oxygen-containing functional groups such as hydroxyl group (-OH) and carboxyl group (-COOH) on the surface of the modified semi-conductive nylon material can also undergo a coupling reaction or an 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, and can effectively prevent sulfur from corroding the copper conductor, thereby improving the reliability of the cable and extending the service life of the cable.

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

[0037] To avoid the physical impact and collision on the surface of the semi-conductive nylon material caused by high working pressure; 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, and cannot be effectively oxidized. In the present 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 1 Pa, 2 Pa, 3 Pa, 4 Pa, 5Pa, 6 Pa, 7 Pa, 8 Pa, 9 Pa or 10 Pa.

[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 can be understood 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 50 W, 51 W, 52 W, 55 W, 58 W, 60 W, 70 W, 80 W, 90 W, 95 W, 98 W, 99 W, 100 W, 101 W, 102 W, 105 W, 110 W, 120 W, 130 W, 140 W, 145 W, 148 W, 149 W or 150 W.

[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 the 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 is also called polyω-aminoundecanoyl, which is obtained by polycondensation of ω-aminoundecanoic acid. The monomer of nylon 6 resin is caprolactam, which is a polymer compound formed by polymerization of caprolactam. Nylon 1010 resin is also called polydecanediamine sebacic acid, which is obtained by polycondensation of sebacic acid.

[0042] In one example, a specific method of coating the modified semi-conductive nylon material on the outer surface of the copper conductor is wrapping, and the gap rate 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 refers to the total gap area between the wrapping materials / the total area of ​​the wrapping materials×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 the present 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-handed 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 can be understood that the mass percentage of sulfur refers to the total content of sulfur in the conductive carbon black, including different forms such as elemental sulfur, inorganic sulfur and organic sulfur. The content of sulfur can be determined by methods such as the Askar method, the coulometric titration method and the 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 above 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 isopropanol;

[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, cooling to room temperature is performed to prepare a modified semi-conductive nylon material;

[0054] S30, wrapping the modified semi-conductive nylon material on the surface of the copper conductor in a right-handed double-layer gap, wherein the gap rate 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, in order to facilitate the wrapping process 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 raw material for preparing the conductive carbon black includes one or more of coal tar, anthracene oil and carbon black oil. Preferably, the raw material for preparing the conductive carbon black is anthracene oil. Anthracene oil is relatively pure, has fewer impurities, and has a relatively low sulfur content, which helps to reduce the sulfur content in the conductive carbon black.

[0058] In one example, the semiconductive shielding layer further includes a base 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-butyl peroxyisopropylbenzene (BIPB) and diisopropylbenzene 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 semiconductive 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 value 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 explain the present application in detail. It should also be understood that the following examples are only used to further explain 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 of the following embodiments are also 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] Embodiment 1 provides a corrosion-resistant 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) evenly laying the cleaned semi-conductive nylon tape material and placing it in a plasma treatment chamber for plasma treatment, wherein 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 semi-conductive nylon tape 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 in a right-handed double-layer gap manner, wherein the 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%, to prepare the corrosion-resistant copper conductor cable.

[0076] Example 2

[0077] Embodiment 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) evenly laying the cleaned semi-conductive nylon tape material and placing it in a plasma treatment chamber for plasma treatment, wherein 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 semi-conductive nylon tape 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 in a right-handed double-layer gap manner, 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%, to prepare the corrosion-resistant copper conductor cable.

[0082] Example 3

[0083] Embodiment 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) evenly laying the cleaned semi-conductive nylon tape material and placing it in a plasma treatment chamber for plasma treatment, wherein 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 in a right-handed double-layer gap manner, 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%, to prepare the corrosion-resistant copper conductor cable.

[0088] Example 4

[0089] Embodiment 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) evenly laying the cleaned semi-conductive nylon tape material and placing it in a plasma treatment chamber for plasma treatment, wherein 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 in a right-handed double-layer gap manner, wherein the 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%, to prepare the corrosion-resistant copper conductor cable.

[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 in 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 winding layer, wherein the mass percentage of the total sulfur element in the conductive carbon black of the semi-conductive shielding material is 0.5%, to prepare the cable.

[0098] Comparative Example 2

[0099] Comparative Example 2 provides a cable and a method for preparing the same, 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 on the surface of the copper conductor with a right-hand double-layer gap, wherein the wrapping gap rate 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%, to prepare the cable.

[0103] Comparative Example 3

[0104] Comparative Example 3 provides a cable and a method for preparing the same, 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) evenly laying the cleaned semi-conductive nylon tape material and placing it in a plasma treatment chamber for plasma treatment, wherein 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 in a right-handed double-layer gap manner, 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%, to prepare the cable.

[0109] Comparative Example 4

[0110] Comparative Example 4 provides a cable and a method for preparing the same, 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) evenly laying the cleaned semi-conductive nylon tape material and placing it in a plasma treatment chamber for plasma treatment, wherein 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 in a right-handed double-layer gap manner, 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%, to prepare the cable.

[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 h, and then the copper conductors were stripped out and compared with the ASTM D 130 / TP 154 corrosive sulfur detection standard colorimetric card, and the corrosion degree of the copper conductors was obtained as shown in Table 1. 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 can be seen from Table 1, the preparation method provided by the present application uses plasma to treat the semi-conductive nylon tape material, and on the basis of optimizing the process parameters of the plasma treatment, the semi-conductive nylon tape material is cleaned in coordination with the cleaning agent, which can effectively modify the semi-conductive nylon tape material and effectively reduce the migration and reactivity of organic sulfur, showing an excellent anti-corrosion effect on copper conductors. Comparative Examples 1 and 2 were not treated with plasma, resulting in corrosion levels of 3a and 3b, which were relatively serious. Comparative Examples 3 and 4 were treated with plasma, but the process parameters of the plasma treatment: the oxygen flow rate was slightly low or the working pressure was slightly high, which resulted in the inability to modify the semi-conductive nylon material. The corresponding cable had a corrosion level of 2b, which was relatively serious compared to the embodiment.

[0120] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, which is convenient for understanding the technical solution of the present application in detail, but it 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 modifications and improvements can be made, which all belong to 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 an anti-corrosion 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; The modified semi-conductive nylon material is coated on the outer surface of the copper conductor to prepare a modified layer; The anti-corrosion copper conductor cable is prepared by coating the outer surface of the modified layer with a semi-conductive shielding layer, wherein the semi-conductive 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 process parameters of the plasma treatment also include one or more of the following features: (1) The power of the plasma treatment is 50W~200W; (2) The plasma treatment time is 30s~300s.

3. 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.

4. 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%.

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

6. The method for preparing the anti-corrosion copper conductor cable according to any one of claims 1 to 4, characterized in that: 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: 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.

7. The method for preparing the anti-corrosion copper conductor cable according to any one of claims 1 to 4, characterized in that: The semiconductive shielding layer also includes a base resin, a crosslinking agent and a coupling agent.

8. 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 7; 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.

9. The corrosion-resistant copper conductor cable according to claim 8, 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.

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

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