CN114171251A - Power cable with chemical corrosion resistance - Google Patents

Power cable with chemical corrosion resistance Download PDF

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Publication number
CN114171251A
CN114171251A CN202111435110.7A CN202111435110A CN114171251A CN 114171251 A CN114171251 A CN 114171251A CN 202111435110 A CN202111435110 A CN 202111435110A CN 114171251 A CN114171251 A CN 114171251A
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parts
boron nitride
power cable
hexagonal boron
maleic anhydride
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CN114171251B (en
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李福春
张童
陈云
薛才林
赵荣
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Anhui Electric Group Shares Co ltd
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Anhui Electric Group Shares Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/2806—Protection against damage caused by corrosion
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
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    • C08K9/02—Ingredients treated with inorganic substances
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    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
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    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/028—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients with screen grounding means, e.g. drain wires
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/382—Boron-containing compounds and nitrogen
    • C08K2003/385—Binary compounds of nitrogen with boron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention discloses a power cable with chemical corrosion resistance, which comprises: a conductor; an insulating layer coated outside the conductor; an inner sheath layer coated outside the insulating layer; the shielding layer is coated outside the inner sheath layer; and the outer sheath layer is coated outside the shielding layer, wherein the inner sheath layer and the outer sheath layer are made of the following raw materials in parts by mass: 40-60 parts of high-density polyethylene, 3-5 parts of maleic anhydride grafted high-density polyethylene, 5-10 parts of maleic anhydride grafted fluororubber, 2-3 parts of EVA resin, 20-30 parts of modified aluminum hydroxide, 2-4 parts of modified hexagonal boron nitride nanosheets, 0.1-1 part of antioxidant and 0.1-1 part of lubricant. The cable provided by the invention has excellent chemical corrosion resistance and is suitable for being applied to the field of chemical industry.

Description

Power cable with chemical corrosion resistance
Technical Field
The invention relates to the technical field of advanced manufacturing, in particular to a power cable with chemical corrosion resistance.
Background
In power cables used in power transmission and transformation lines, electrical control lines and the like of oil refineries and chemical plants, PVC or PE materials used as cable sheaths are often exposed to various chemicals such as acids, alkalis, organic solvents and the like, and are easily corroded and damaged, thereby causing adverse effects such as reduction in communication quality, reduction in service life of the cables and the like. Therefore, in order to meet the requirements for use in the chemical field, it is necessary to develop a power cable having excellent chemical resistance.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a power cable with chemical corrosion resistance.
The invention provides a power cable with chemical corrosion resistance, which comprises: a conductor; an insulating layer coated outside the conductor; an inner sheath layer coated outside the insulating layer; the shielding layer is coated outside the inner sheath layer; and an outer sheath layer coated outside the shielding layer;
the inner sheath layer and the outer sheath layer are prepared from the following raw materials in parts by mass: 40-60 parts of high-density polyethylene, 3-5 parts of maleic anhydride grafted high-density polyethylene, 5-10 parts of maleic anhydride grafted fluororubber, 2-3 parts of EVA resin, 20-30 parts of modified aluminum hydroxide, 2-4 parts of modified hexagonal boron nitride nanosheets, 0.1-1 part of antioxidant and 0.1-1 part of lubricant.
Preferably, the maleic anhydride grafting rate of the maleic anhydride grafted high-density polyethylene is 1-2%.
The maleic anhydride grafted high-density polyethylene can be prepared by a conventional solution grafting method or a melt grafting method. For example, it may be: dissolving maleic anhydride and an initiator in a proper amount of acetone, mixing with high-density polyethylene, and performing melt extrusion at the temperature of 180 ℃ by adopting a double-screw extruder to obtain the modified polyethylene; wherein, the initiator is preferably DCP, BPO or the combination thereof, and the mass ratio of the high-density polyethylene to the maleic anhydride is preferably 100: (1.5-3), the mass ratio of the high-density polyethylene to the initiator is preferably 100: (0.3-0.5).
Preferably, the maleic anhydride grafting rate of the maleic anhydride grafted fluororubber is 1-3%.
The maleic anhydride grafted fluororubber can be prepared by a conventional melt grafting method. For example, it may be: adding the fluororubber, the maleic anhydride and the initiator into an internal mixer, and carrying out melt grafting reaction at the temperature of 140-; wherein, the initiator is preferably DCP, BPO or the combination thereof, and the mass ratio of the fluorine rubber to the maleic anhydride is preferably 100: (4-10), the mass ratio of the fluororubber to the initiator is preferably 100: (0.1-1).
Preferably, the preparation method of the modified hexagonal boron nitride nanosheet comprises the following steps:
s1, adding the hexagonal boron nitride nanosheets into a sodium hydroxide solution for uniform dispersion, then heating, stirring and reacting, and after the reaction is finished, centrifuging, washing and drying to obtain hydroxylated hexagonal boron nitride nanosheets;
and S2, carrying out surface grafting modification on the hydroxylated hexagonal boron nitride nanosheets by adopting an aminosilane coupling agent to obtain modified hexagonal boron nitride nanosheets.
Preferably, the diameter of the hexagonal boron nitride nanosheet is 50-500nm, the concentration of the sodium hydroxide solution is 3-5mol/L, and the ratio of the hexagonal boron nitride nanosheet to the sodium hydroxide solution is (0.3-1) g: 100 mL.
Preferably, in S1, the reaction is carried out at 80-95 deg.C for 12-24 h.
Preferably, in S2, the mass ratio of the aminosilane coupling agent to the hydroxylated hexagonal boron nitride nanosheets is (1-2): 10.
preferably, in S2, the specific step of performing surface graft modification on the hydroxylated hexagonal boron nitride nanosheet by using an aminosilane coupling agent is: performing mass ratio of an aminosilane coupling agent to ethanol to water of 1: (20-50): (2-5), uniformly mixing, adding the hydroxylated hexagonal boron nitride nanosheet, uniformly dispersing, stirring and reacting at 70-90 ℃ for 1-3h, filtering, and drying to obtain the nano-crystalline silicon nitride.
Preferably, the aminosilane coupling agent is at least one of KH550, KH540, KH792 and KH 602.
Preferably, the modified aluminum hydroxide is obtained by performing surface grafting modification on aluminum hydroxide by using a silane coupling agent; preferably, the silane coupling agent is used for carrying out surface grafting modification on the aluminum hydroxide, and the specific steps are as follows: mixing a silane coupling agent, ethanol and water according to a mass ratio of 1: (40-60): (4-6), uniformly mixing, then adding aluminum hydroxide for uniform dispersion, stirring and reacting at 60-90 ℃ for 1-3h, filtering and drying to obtain the catalyst; preferably, the mass ratio of the silane coupling agent to the aluminum hydroxide is (2-5): 100, respectively; the specific type of the silane coupling agent is not limited, and may be a commonly used silane coupling agent, and preferably at least one of KH550, KH540, KH792, and KH 602.
Preferably, the conductor is a stranded compacted copper conductor.
Preferably, the insulating layer is a crosslinked polyethylene insulating layer and is made of a crosslinked polyethylene insulating material as a raw material. The crosslinked polyethylene insulation of the present invention is not particularly limited.
Preferably, the shielding layer is a double-layer aluminum-plastic composite tape longitudinal cladding layer and is provided with a tinned copper wire drainage wire.
The invention has the following beneficial effects:
the cable disclosed by the invention adopts a multi-strand twisted compression type conductor, and the insulating layer adopts cross-linked polyethylene, so that the cable has certain chemical corrosion resistance compared with a common insulating material; the shielding layer adopts a double-sided aluminum-plastic composite tape, and the aluminum layer can prevent aromatic hydrocarbon and the like from penetrating and damaging the inner insulating layer; the inner sheath material and the outer sheath material are made of polyolefin composite materials, and are compounded by high-density polyethylene, maleic anhydride grafted fluororubber, EVA resin, modified aluminum hydroxide and modified hexagonal boron nitride nanosheets in a proper proportion, wherein the grafting of maleic anhydride to polyethylene and fluororubber improves the compatibility between different high polymer materials and with fillers, the EVA resin improves the processing performance of the materials, the modified hexagonal boron nitride nanosheets are subjected to surface hydroxylation modification and grafting of an amino silane-containing coupling agent, so that the dispersion effect in a resin matrix is good, and the amino group can perform chemical bonding action with the maleic anhydride polar group grafted on the matrix resin, so that the chemical corrosion resistance of the hexagonal boron nitride nanosheets in the resin matrix is enhanced, the modified aluminum hydroxide can be uniformly dispersed in the resin, and the sheath layer has excellent flame retardant performance, by optimizing the formula, the inner sheath layer and the outer sheath layer have excellent chemical corrosion resistance, chemical resistance, medicine penetrability inhibition and good flame retardance, and are not melted, dropped or delayed to burn under the condition of burning; therefore, the cable provided by the invention has excellent chemical corrosion resistance and flame retardance, can better meet the safety use requirements in the fields of oil refineries, chemical plants, steel plants and the like, and is suitable for being applied to the chemical field.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
In the following examples and comparative examples, the high density polyethylene was named dow 3364; the fluororubber is 26 type fluororubber with the trademark of DuPont VITON A; the EVA resin is DuPont 260; the crosslinked polyethylene insulating material is available under the trademark of Dow HFDB-4201NT K.
Example 1
A power cable having chemical resistance properties comprising: stranding and pressing the copper conductor in multiple strands; the insulating layer is coated outside the conductor and is made of a cross-linked polyethylene insulating material; an inner sheath layer coated outside the insulating layer; the shielding layer is coated outside the inner sheath layer, is a double-layer aluminum-plastic composite tape longitudinal cladding layer and is provided with a tinned copper wire drainage wire; and an outer sheath layer coated outside the shielding layer;
the inner sheath layer and the outer sheath layer are prepared from the following raw materials in parts by mass: 50 parts of high-density polyethylene, 4 parts of maleic anhydride grafted high-density polyethylene, 6 parts of maleic anhydride grafted fluororubber, 2.5 parts of EVA resin, 25 parts of modified aluminum hydroxide, 3 parts of modified hexagonal boron nitride nanosheets, 0.5 part of antioxidant and 0.3 part of lubricant.
The maleic anhydride grafting rate of the maleic anhydride grafted high-density polyethylene is 1.12 percent, and the preparation method comprises the following steps: dissolving maleic anhydride and an initiator DCP in a proper amount of acetone, mixing with high-density polyethylene, and performing melt extrusion at 180 ℃ by adopting a double-screw extruder, wherein the mass ratio of the high-density polyethylene to the initiator DCP is 100: 2: 0.4.
the grafting rate of the maleic anhydride grafted fluororubber is 1.65%, and the preparation method comprises the following steps: adding fluororubber, maleic anhydride and an initiator DCP into an internal mixer, and carrying out melt grafting reaction for 15min at the temperature of 150 ℃, wherein the mass ratio of the fluororubber to the maleic anhydride to the initiator DCP is 100: 6: 0.3.
the preparation method of the modified hexagonal boron nitride nanosheet comprises the following steps:
s1, adding a hexagonal boron nitride nanosheet with the diameter of 200nm into a sodium hydroxide solution with the concentration of 4mol/L to be uniformly dispersed, heating and stirring at 90 ℃ to react for 18 hours, and after the reaction is finished, centrifuging, washing and drying to obtain a hydroxylated hexagonal boron nitride nanosheet, wherein the ratio of the hexagonal boron nitride nanosheet to the sodium hydroxide solution is 0.4 g: 100 mL;
s2, mixing a silane coupling agent KH550, ethanol and water according to a mass ratio of 1: 30: 3, uniformly mixing, adding a hydroxylated hexagonal boron nitride nanosheet, uniformly dispersing, stirring at 80 ℃ for reaction for 2 hours, filtering, and drying to obtain the modified silane coupling agent, wherein the mass ratio of the silane coupling agent KH550 to the hydroxylated hexagonal boron nitride nanosheet is 1.5: 10.
the preparation method of the modified aluminum hydroxide comprises the following steps: mixing a silane coupling agent KH550, ethanol and water according to a mass ratio of 1: 50: 5, uniformly mixing, adding aluminum hydroxide for uniform dispersion, stirring and reacting for 2 hours at the temperature of 80 ℃, filtering and drying to obtain the silane coupling agent KH550 and the aluminum hydroxide, wherein the mass ratio of the silane coupling agent KH550 to the aluminum hydroxide is 3: 100.
the antioxidant is formed by mixing an antioxidant 1010 and an antioxidant 168 according to the mass ratio of 1:1, and the lubricant is ethylene bis stearamide.
Example 2
A power cable having chemical resistance properties comprising: stranding and pressing the copper conductor in multiple strands; the insulating layer is coated outside the conductor and is made of a cross-linked polyethylene insulating material; an inner sheath layer coated outside the insulating layer; the shielding layer is coated outside the inner sheath layer, is a double-layer aluminum-plastic composite tape longitudinal cladding layer and is provided with a tinned copper wire drainage wire; and an outer sheath layer coated outside the shielding layer;
the inner sheath layer and the outer sheath layer are prepared from the following raw materials in parts by mass: 40 parts of high-density polyethylene, 3 parts of maleic anhydride grafted high-density polyethylene, 5 parts of maleic anhydride grafted fluororubber, 2 parts of EVA resin, 20 parts of modified aluminum hydroxide, 2 parts of modified hexagonal boron nitride nanosheets, 0.1 part of antioxidant and 0.1 part of lubricant.
The preparation methods of the maleic anhydride grafted high-density polyethylene, the maleic anhydride grafted fluororubber, the modified aluminum hydroxide and the modified hexagonal boron nitride nanosheet are the same as those in example 1.
The antioxidant is formed by mixing an antioxidant 1010 and an antioxidant 168 according to the mass ratio of 1:1, and the lubricant is ethylene bis stearamide.
Example 3
A power cable having chemical resistance properties comprising: stranding and pressing the copper conductor in multiple strands; the insulating layer is coated outside the conductor and is made of a cross-linked polyethylene insulating material; an inner sheath layer coated outside the insulating layer; the shielding layer is coated outside the inner sheath layer, is a double-layer aluminum-plastic composite tape longitudinal cladding layer and is provided with a tinned copper wire drainage wire; and an outer sheath layer coated outside the shielding layer;
the inner sheath layer and the outer sheath layer are prepared from the following raw materials in parts by mass: 60 parts of high-density polyethylene, 5 parts of maleic anhydride grafted high-density polyethylene, 10 parts of maleic anhydride grafted fluororubber, 3 parts of EVA resin, 30 parts of modified aluminum hydroxide, 4 parts of modified hexagonal boron nitride nanosheets, 1 part of antioxidant and 1 part of lubricant.
The preparation methods of the maleic anhydride grafted high-density polyethylene, the maleic anhydride grafted fluororubber, the modified aluminum hydroxide and the modified hexagonal boron nitride nanosheet are the same as those in example 1.
The antioxidant is formed by mixing an antioxidant 1010 and an antioxidant 168 according to the mass ratio of 1:1, and the lubricant is ethylene bis stearamide.
Comparative example 1
Comparative example 1 differs from example 1 only in that: the inner sheath layer and the outer sheath layer are prepared from the following raw materials in parts by mass: 54 parts of high-density polyethylene, 6 parts of fluororubber, 2.5 parts of EVA resin, 25 parts of modified aluminum hydroxide, 3 parts of modified hexagonal boron nitride nanosheets, 0.5 part of antioxidant and 0.3 part of lubricant.
The preparation methods of the modified aluminum hydroxide and the modified hexagonal boron nitride nanosheet are the same as in example 1.
The antioxidant is formed by mixing an antioxidant 1010 and an antioxidant 168 according to the mass ratio of 1:1, and the lubricant is ethylene bis stearamide.
Comparative example 2
Comparative example 2 differs from example 1 only in that: the inner sheath layer and the outer sheath layer are prepared from the following raw materials in parts by mass: 50 parts of high-density polyethylene, 4 parts of maleic anhydride grafted high-density polyethylene, 6 parts of maleic anhydride grafted fluororubber, 2.5 parts of EVA resin, 25 parts of modified aluminum hydroxide, 0.5 part of antioxidant and 0.3 part of lubricant.
The preparation methods of the maleic anhydride grafted high-density polyethylene, the maleic anhydride grafted fluororubber and the modified aluminum hydroxide are the same as in example 1.
The antioxidant is formed by mixing an antioxidant 1010 and an antioxidant 168 according to the mass ratio of 1:1, and the lubricant is ethylene bis stearamide.
Test examples
The sheath layers of example 1 and comparative examples 1 to 2 were subjected to a corrosion test at 30 ℃ for 7 days to measure the change rates of tensile strength and elongation at break. The results are shown in table 1:
TABLE 1
Figure BDA0003381352970000071
Figure BDA0003381352970000081
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A power cable having chemical resistance, comprising: a conductor; an insulating layer coated outside the conductor; an inner sheath layer coated outside the insulating layer; the shielding layer is coated outside the inner sheath layer; and an outer sheath layer coated outside the shielding layer;
the inner sheath layer and the outer sheath layer are prepared from the following raw materials in parts by mass: 40-60 parts of high-density polyethylene, 3-5 parts of maleic anhydride grafted high-density polyethylene, 5-10 parts of maleic anhydride grafted fluororubber, 2-3 parts of EVA resin, 20-30 parts of modified aluminum hydroxide, 2-4 parts of modified hexagonal boron nitride nanosheets, 0.1-1 part of antioxidant and 0.1-1 part of lubricant.
2. The power cable having chemical resistance according to claim 1, wherein the maleic anhydride graft ratio of the maleic anhydride-grafted high density polyethylene is 1-2%.
3. The power cable having chemical resistance according to claim 1, wherein the maleic anhydride grafted fluororubber has a maleic anhydride grafting ratio of 1 to 3%.
4. The power cable with chemical resistance according to claim 1, wherein the preparation method of the modified hexagonal boron nitride nanosheets comprises:
s1, adding the hexagonal boron nitride nanosheets into a sodium hydroxide solution for uniform dispersion, then heating, stirring and reacting, and after the reaction is finished, centrifuging, washing and drying to obtain hydroxylated hexagonal boron nitride nanosheets;
and S2, carrying out surface grafting modification on the hydroxylated hexagonal boron nitride nanosheets by adopting an aminosilane coupling agent to obtain modified hexagonal boron nitride nanosheets.
5. The power cable with chemical resistance according to claim 4, wherein the diameter of the hexagonal boron nitride nanosheets is 50-500nm, the concentration of the sodium hydroxide solution is 3-5mol/L, and the ratio of hexagonal boron nitride nanosheets to sodium hydroxide solution is (0.3-1) g: 100 mL;
in S1, the temperature for heating and stirring reaction is 80-95 ℃ and the time is 12-24 h.
6. A power cable having chemical resistance according to claim 4,
the mass ratio of the aminosilane coupling agent to the hydroxylated hexagonal boron nitride nanosheet is (1-2): 10;
the aminosilane coupling agent is at least one of KH550, KH540, KH792 and KH 602.
7. The power cable with chemical resistance of claim 1, wherein the modified aluminum hydroxide is obtained by surface grafting modification of aluminum hydroxide by a silane coupling agent; preferably, the mass ratio of the silane coupling agent to the aluminum hydroxide is (2-5): 100, respectively; preferably, the silane coupling agent is at least one of KH550, KH540, KH792 and KH 602.
8. A power cable having chemical resistance according to claim 1, wherein the conductor is a stranded compacted copper conductor.
9. A power cable having chemical resistance according to claim 1, characterized in that the insulating layer is a crosslinked polyethylene insulating layer.
10. The power cable with chemical corrosion resistance of claim 1, wherein the shielding layer is a double-layer aluminum-plastic composite tape longitudinal cladding layer and is provided with a tinned copper wire drainage wire.
CN202111435110.7A 2021-11-29 2021-11-29 Power cable with chemical corrosion resistance Active CN114171251B (en)

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CN108948496A (en) * 2018-07-25 2018-12-07 国网河南省电力公司邓州市供电公司 A kind of buried cable sheath material and preparation method thereof
CN112280144A (en) * 2020-10-22 2021-01-29 广东创兴电缆有限公司 Stretch-resistant composite cable and production process thereof
CN113628789A (en) * 2021-08-16 2021-11-09 贵州新曙光电缆有限公司 TPE insulated high-voltage cable in electric automobile

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