CN116598075B - Engine wire harness with good shielding property and preparation method thereof - Google Patents

Engine wire harness with good shielding property and preparation method thereof Download PDF

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Publication number
CN116598075B
CN116598075B CN202310357304.2A CN202310357304A CN116598075B CN 116598075 B CN116598075 B CN 116598075B CN 202310357304 A CN202310357304 A CN 202310357304A CN 116598075 B CN116598075 B CN 116598075B
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carbon fiber
wire harness
good shielding
porous carbon
biomass porous
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CN116598075A (en
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董国庆
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Wuxi Nanaobo Auto Electric Appliance Technology Co ltd
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Wuxi Nanaobo Auto Electric Appliance Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/48—Coating with alloys
    • C23C18/50—Coating with alloys with alloys based on iron, cobalt or nickel
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
    • D06M13/228—Cyclic esters, e.g. lactones
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/53—Polyethers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/59—Polyamides; Polyimides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/012—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
    • H01B13/01263—Tying, wrapping, binding, lacing, strapping or sheathing harnesses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/30—Drying; Impregnating
    • 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
    • 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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/40—Fibres of carbon
    • 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)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Textile Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The invention relates to the field of automobiles, in particular to an engine wire harness with good shielding property and a preparation method thereof, wherein carbon fibers are pickled by Mi acid, amino hyperbranched polyamide is crosslinked in a solvent by polyethylene glycol diglycidyl ether, crosslinked dendrimers are solidified on the surfaces of the carbon fibers through hydrogen bonds by dipping, and then cobalt and nickel are plated on the surfaces of the carbon fibers in an orderly array by cobalt and nickel composite plating solution; introducing composite biomass porous carbon into the protective coating to realize the thin-layer efficient absorption of the protective layer; loading a bimetal zinc-iron MOF with 2, 5-dihydroxyterephthalic acid as a ligand by using biomass porous carbon as a carrier to obtain composite biomass porous carbon; amino hyperbranched polyamide and composite biomass porous carbon are introduced into the protective coating, wherein the amino hyperbranched polyamide is generated by the reaction of N, N' -cystamine bisacrylamide and 1-amino-4- (2-hydroxyethyl) piperazine, so that the protective layer is endowed with excellent self-repairing performance, and the wear resistance and flame retardance of the protective layer are improved.

Description

Engine wire harness with good shielding property and preparation method thereof
Technical Field
The invention relates to the field of automobiles, in particular to an engine wire harness with good shielding property and a preparation method thereof.
Background
The engine harness of the automobile is an important component for ensuring the normal operation of the automobile, the reliability of the engine harness is closely related to the power and safety of the automobile, and the engine harness of the automobile needs to avoid the interference of electromagnetic waves when transmitting electric signals, so that the engine harness of the automobile needs to have better electromagnetic shielding property.
Along with the progress of society, the automobile is developed to be light, and the quality of the automobile is reduced while the performance of the automobile is ensured, so that the automobile has practical significance. The traditional shielding wire is generally wrapped by a metal mesh braid layer made of red copper or tinned copper, has heavier mass and is not beneficial to the requirement of light weight of automobiles; the single plastic protective sleeve cannot meet the shielding requirement of the wire harness, and the electromagnetic shielding performance of the wire harness is improved by adding high-content conductive filler, but the mechanical property of the plastic protective sleeve is reduced, the existing protective sleeve is difficult to recover when the existing protective sleeve is mechanically damaged, and the electromagnetic shielding performance of the protective sleeve is reduced.
Disclosure of Invention
The invention aims to provide an engine wire harness with good shielding property and a preparation method thereof, which are used for solving the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
a preparation method of an engine wire harness with good shielding property comprises the following steps:
s1: preparing amino hyperbranched polyamide;
s2: acidizing the carbon fiber by using Mi's acid; preparing an impregnating solution by using amino hyperbranched polyamide and polyethylene glycol diglycidyl ether, and carrying out impregnation treatment on the acidified carbon fiber to obtain a crosslinked carbon fiber;
s3: transferring the crosslinked carbon fiber into a cobalt-nickel composite plating solution, and carrying out surface cobalt-nickel plating treatment to obtain a modified carbon fiber;
s4: preparing protective coating by using amino hyperbranched polyamide, composite biomass porous carbon, flame retardant and aqueous epoxy resin;
s5: coating protective coating on the surface of the heat-shrinkable tube to form a protective layer, thereby obtaining a protective sleeve;
s6: the modified carbon fiber and the protective sleeve are sleeved outside the wire core in sequence, so that the engine wire harness with good shielding property is obtained.
Further, the preparation of the amino hyperbranched polyamide comprises the following steps: mixing and stirring cystamine dihydrochloride and deionized water, adding mixed solution of sodium hydroxide, acryloyl chloride and methylene dichloride at 0 ℃, stirring for 1-2h, filtering and drying to obtain N, N' -cystamine bisacrylamide; mixing N, N' -cystamine bisacrylamide with 1-amino-4- (2-hydroxyethyl) piperazine, adding a mixed solution of methanol and deionized water, and preserving the temperature for 1-2d at 50 ℃ to obtain the amino hyperbranched polyamide.
Further, the preparation of the crosslinked carbon fiber comprises the following steps: mixing the amino hyperbranched polyamide and methanol, heating to 55-60 ℃, adding polyethylene glycol diglycidyl ether, preserving heat for 5-6h, cooling to 18-25 ℃ to obtain an impregnating solution, adding acidified carbon fiber, and carrying out impregnation treatment for 1h to obtain the crosslinked carbon fiber.
Further, the cobalt-nickel composite plating solution comprises the following components: taking 14mL of ammonia water as a solvent, wherein the solvent contains 1.5g of nickel sulfate, 1.5g of cobalt sulfate, 3g of sodium citrate and 1g of sodium hypophosphite; the working conditions of the surface cobalt-nickel plating treatment are as follows: the temperature is 75-80 ℃, and the heat preservation time is 20-25min.
Further, the preparation of the composite biomass porous carbon comprises the following steps:
1) Cleaning pine nut shells, grinding, mixing and ball milling pine nut shell powder and sodium hydroxide for 15-20min, preserving heat for 80-90min at 590-600 ℃ under nitrogen atmosphere, and cleaning with hydrochloric acid until the pH is neutral to obtain biomass porous carbon;
2) Mixing zinc chloride, ferric chloride, 2, 5-dihydroxyterephthalic acid and N, N-dimethylformamide, adding biomass porous carbon and sodium hydroxide, performing ultrasonic treatment for 20-30min, transferring into a reaction kettle, preserving heat at 145-150 ℃ for 22-24h, cooling, centrifuging, washing and drying to obtain the composite biomass porous carbon.
Further, the protective coating comprises the following components in parts by weight: 36-44 parts of aqueous epoxy resin, 2-6 parts of composite biomass porous carbon, 2-6 parts of amino hyperbranched polyamide and 2-4 parts of flame retardant.
Further, in the protective coating, the flame retardant comprises aluminum diethyl phosphinate and melamine polyphosphate in a mass ratio of 2:1, and compounding to obtain the product.
Further, the heat shrinkage tube is one of polyvinyl chloride, polyethylene and polytetrafluoroethylene.
Further, the working conditions of the acidification treatment are as follows: ultrasonic soaking with 8-10% Michaelis acid for 1-2 hr.
The invention has the beneficial effects that:
the invention provides an engine wire harness with good shielding property and a preparation method thereof, wherein modified carbon fibers and a heat shrinkage tube coated with protective paint are sleeved on the surface of a wire core, so that the engine wire harness is endowed with excellent electromagnetic shielding property, flame retardance and self-repairing property, and the service life of the engine wire harness is prolonged.
The carbon fiber has high dielectric loss on electromagnetic waves because of excellent conductivity, and is an ideal electromagnetic shielding material; the carbon fiber has high strength and high modulus, and the impact resistance of the carbon fiber can be effectively improved by wrapping the surface of the wire core, but the secondary pollution to the environment can be caused by the higher reflection of the single carbon fiber to electromagnetic waves, and the surface roughness of the carbon fiber is low and active groups are absent, so that the carbon fiber is modified, the electromagnetic shielding performance of the carbon fiber is improved, and the secondary reflection of the carbon fiber is reduced.
The carbon fiber is pickled by Mi's acid, the reactivity of the carbon fiber is improved while the self characteristic of the carbon fiber is not changed, the amino hyperbranched polyamide is crosslinked in a solvent by using polyethylene glycol diglycidyl ether, the crosslinked dendrimer is solidified on the surface of the carbon fiber through hydrogen bonding by dipping, and then the cobalt-nickel composite plating solution is used for plating orderly array cobalt-nickel on the surface of the carbon fiber, so that the electromagnetic shielding property and the flame retardance of the carbon fiber are improved.
According to the invention, the protective coating is coated on the heat shrink tube, and the self-repairing property, electromagnetic shielding property and flame retardance are given to the protective coating, so that the protective sleeve of the engine wire harness can be rapidly self-repaired when the protective sleeve encounters mechanical damage, the safety of electromagnetic shielding is not influenced, and the service life of the engine wire harness is prolonged.
The composite biomass porous carbon is introduced into the protective coating to realize the efficient absorption of the thin layer of the protective layer, and the efficient absorption performance of electromagnetic waves is still maintained when the thickness of the protective layer is 0.3-0.5 mm;
the biomass porous carbon and the MOF have excellent properties of ordered pore structure, large specific surface area, easy surface modification, good thermochemical stability and the like, and are ideal materials for absorbing electromagnetic waves. According to the invention, a biomass porous carbon is used as a carrier to load a bimetal zinc-iron MOF (metal-based organic framework) with 2, 5-dihydroxyterephthalic acid as a ligand, so as to obtain a composite biomass porous carbon; the bimetallic zinc-iron MOF in the composite biomass porous carbon can effectively improve electromagnetic wave absorption performance, has a high specific surface area and a large number of porous structures, provides a plurality of microwave reflection points, is beneficial to attenuation of microwave energy, and improves the flame retardant capability of the protective layer when the composite biomass porous carbon is introduced.
The diethyl aluminum phosphinate has good thermal stability and high phosphorus content, is an efficient and environment-friendly organic phosphorus flame retardant, is compounded with melamine polyphosphate for use, effectively improves the flame retardance of the protective layer, and plays a role in adsorbing and removing harmful substances and assisting the flame retardance of the flame retardant by the bimetallic zinc-iron MOF on the composite biomass porous carbon in the protective layer.
Amino hyperbranched polyamide and composite biomass porous carbon are introduced into the protective coating, wherein the amino hyperbranched polyamide is generated by the reaction of N, N' -cystamine bisacrylamide and 1-amino-4- (2-hydroxyethyl) piperazine, and the excellent self-repairing performance of the protective layer is endowed by means of the coordination and hydrogen bonding action of metal ions, amino, amido and piperazinyl in the protective coating, meanwhile, the complexity of a crosslinked network in the protective layer is improved, and the wear resistance and flame retardance of the protective layer are improved.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely in connection with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications such as up, down, left, right, front, and rear … … are involved in the embodiment of the present invention, the directional indications are merely used to explain a relative positional relationship, a movement condition, and the like between a certain posture such as the respective components, and if the certain posture is changed, the directional indications are changed accordingly. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The following description of the embodiments of the present invention will be presented in further detail with reference to the examples, which should be understood as being merely illustrative of the present invention and not limiting.
Example 1: a preparation method of an engine wire harness with good shielding property comprises the following steps:
s1: preparing an amino hyperbranched polyamide comprising the steps of:
mixing and stirring 11.25g of cystamine dihydrochloride and 100mL of deionized water, adding a mixed solution of 8g of sodium hydroxide, 9.4g of acryloyl chloride and 100mL of dichloromethane at 0 ℃, stirring for 1h, filtering and drying to obtain N, N' -cystamine bisacrylamide; mixing 7.5g of N, N' -cystamine bisacrylamide and 3.23g of 1-amino-4- (2-hydroxyethyl) piperazine, adding 18mL of a mixed solution of methanol and 2mL of deionized water, and preserving heat for 1d at 50 ℃ to obtain amino hyperbranched polyamide;
s2: acidizing the carbon fiber by using Mi's acid; preparing an impregnating solution by using amino hyperbranched polyamide and polyethylene glycol diglycidyl ether, and carrying out impregnation treatment on the acidified carbon fiber to obtain a crosslinked carbon fiber;
the working conditions of the acidification treatment are as follows: ultrasonic soaking with 8% Mi's acid for 2 hr;
the preparation of the crosslinked carbon fiber comprises the following steps: mixing 2g of amino hyperbranched polyamide and 100mL of methanol, heating to 55 ℃, adding 1.5mL of polyethylene glycol diglycidyl ether, preserving heat for 6 hours, cooling to 18 ℃ to obtain an impregnating solution, and adding 1g of pretreated carbon fiber for impregnating treatment for 1 hour to obtain crosslinked carbon fiber;
s3: transferring the crosslinked carbon fiber into a cobalt-nickel composite plating solution, and carrying out surface cobalt-nickel plating treatment to obtain a modified carbon fiber;
the cobalt-nickel composite plating solution comprises the following components: 14mL of 5% ammonia water is taken as a solvent, and 1.5g of nickel sulfate, 1.5g of cobalt sulfate, 3g of sodium citrate and 1g of sodium hypophosphite are contained; the working conditions of the surface cobalt-nickel plating treatment are as follows: preserving heat at 75 ℃ for 25min;
s4: preparing protective coating by using amino hyperbranched polyamide, composite biomass porous carbon, flame retardant and aqueous epoxy resin;
the protective coating comprises the following components in parts by weight: 36 parts of waterborne epoxy resin, 2 parts of composite biomass porous carbon, 2 parts of amino hyperbranched polyamide and 2 parts of flame retardant; the flame retardant consists of diethyl aluminum phosphinate and melamine polyphosphate in a mass ratio of 2:1, compounding to obtain the compound;
the preparation of the composite biomass porous carbon comprises the following steps:
1) Cleaning pine nut shells, grinding, mixing and ball milling 1g of pine nut shell powder and 1g of NaOH for 15min, preserving heat for 90min at 590 ℃ under nitrogen atmosphere, and cleaning with 1mol/L hydrochloric acid until the pH is neutral to obtain biomass porous carbon;
2) Mixing 0.05mmol of zinc chloride, 0.05mmol of ferric chloride, 0.1g of 2, 5-dihydroxyterephthalic acid and 10mLN, N-dimethylformamide, adding 0.07g of biomass porous carbon and 10mL of sodium hydroxide, performing ultrasonic treatment for 20min, transferring into a reaction kettle, preserving heat at 145 ℃ for 24h, cooling, centrifuging, washing and drying to obtain composite biomass porous carbon;
s5: coating protective coating on the surface of the heat-shrinkable tube to form a protective layer, thereby obtaining a protective sleeve; the heat shrinkage pipe is polyethylene;
s6: the modified carbon fiber and the protective sleeve are sleeved outside the wire core in sequence, so that the engine wire harness with good shielding property is obtained.
Example 2: a preparation method of an engine wire harness with good shielding property comprises the following steps:
s1: preparing an amino hyperbranched polyamide comprising the steps of:
mixing and stirring 11.25g of cystamine dihydrochloride and 100mL of deionized water, adding a mixed solution of 8g of sodium hydroxide, 9.4g of acryloyl chloride and 100mL of dichloromethane at 0 ℃, stirring for 1.5h, filtering and drying to obtain N, N' -cystamine bisacrylamide; mixing 7.5g of N, N' -cystamine bisacrylamide and 3.23g of 1-amino-4- (2-hydroxyethyl) piperazine, adding 18mL of a mixed solution of methanol and 2mL of deionized water, and preserving the temperature for 1.5d at 50 ℃ to obtain amino hyperbranched polyamide;
s2: acidizing the carbon fiber by using Mi's acid; preparing an impregnating solution by using amino hyperbranched polyamide and polyethylene glycol diglycidyl ether, and carrying out impregnation treatment on the acidified carbon fiber to obtain a crosslinked carbon fiber;
the working conditions of the acidification treatment are as follows: ultrasonic impregnation with 9% Mi's acid for 1.5h;
the preparation of the crosslinked carbon fiber comprises the following steps: mixing 2g of amino hyperbranched polyamide and 100mL of methanol, heating to 58 ℃, adding 1.5mL of polyethylene glycol diglycidyl ether, preserving heat for 5.5h, cooling to 20 ℃ to obtain an impregnating solution, and adding 1g of pretreated carbon fiber for impregnating treatment for 1h to obtain crosslinked carbon fiber;
s3: transferring the crosslinked carbon fiber into a cobalt-nickel composite plating solution, and carrying out surface cobalt-nickel plating treatment to obtain a modified carbon fiber;
the cobalt-nickel composite plating solution comprises the following components: 14mL of 5% ammonia water is taken as a solvent, and 1.5g of nickel sulfate, 1.5g of cobalt sulfate, 3g of sodium citrate and 1g of sodium hypophosphite are contained; the working conditions of the surface cobalt-nickel plating treatment are as follows: preserving heat at 78 ℃ for 22min;
s4: preparing protective coating by using amino hyperbranched polyamide, composite biomass porous carbon, flame retardant and aqueous epoxy resin;
the protective coating comprises the following components in parts by weight: 40 parts of waterborne epoxy resin, 5 parts of composite biomass porous carbon, 4 parts of amino hyperbranched polyamide and 3 parts of flame retardant; in the protective coating, the flame retardant consists of diethyl aluminum phosphinate and melamine polyphosphate in a mass ratio of 2:1, compounding to obtain the compound;
the preparation of the composite biomass porous carbon comprises the following steps:
1) Cleaning pine nut shells, grinding, mixing 1g of pine nut shell powder and 1g of NaOH, ball milling for 18min, preserving heat at 595 ℃ for 85min under nitrogen atmosphere, and cleaning with 1mol/L hydrochloric acid until the pH is neutral to obtain biomass porous carbon;
2) Mixing 0.05mmol of zinc chloride, 0.05mmol of ferric chloride, 0.1g of 2, 5-dihydroxyterephthalic acid and 10mLN, N-dimethylformamide, adding 0.07g of biomass porous carbon and 10mL of sodium hydroxide, performing ultrasonic treatment for 25min, transferring into a reaction kettle, preserving heat at 148 ℃ for 23h, cooling, centrifuging, washing and drying to obtain composite biomass porous carbon;
s5: coating protective coating on the surface of the heat-shrinkable tube to form a protective layer, thereby obtaining a protective sleeve; the heat shrinkage pipe is polyethylene;
s6: the modified carbon fiber and the protective sleeve are sleeved outside the wire core in sequence, so that the engine wire harness with good shielding property is obtained.
Example 3: a preparation method of an engine wire harness with good shielding property comprises the following steps:
s1: preparing an amino hyperbranched polyamide comprising the steps of:
mixing and stirring 11.25g of cystamine dihydrochloride and 100mL of deionized water, adding a mixed solution of 8g of sodium hydroxide, 9.4g of acryloyl chloride and 100mL of dichloromethane at 0 ℃, stirring for 2h, filtering and drying to obtain N, N' -cystamine bisacrylamide; mixing 7.5g of N, N' -cystamine bisacrylamide and 3.23g of 1-amino-4- (2-hydroxyethyl) piperazine, adding 18mL of a mixed solution of methanol and 2mL of deionized water, and preserving heat for 2d at 50 ℃ to obtain amino hyperbranched polyamide;
s2: acidizing the carbon fiber by using Mi's acid; preparing an impregnating solution by using amino hyperbranched polyamide and polyethylene glycol diglycidyl ether, and carrying out impregnation treatment on the acidified carbon fiber to obtain a crosslinked carbon fiber;
the working conditions of the acidification treatment are as follows: ultrasonic soaking with 10% Mi's acid for 1 hr;
the preparation of the crosslinked carbon fiber comprises the following steps: mixing 2g of amino hyperbranched polyamide and 100mL of methanol, heating to 60 ℃, adding 1.5mL of polyethylene glycol diglycidyl ether, preserving heat for 5 hours, cooling to 25 ℃ to obtain an impregnating solution, and adding 1g of pretreated carbon fiber for impregnating treatment for 1 hour to obtain crosslinked carbon fiber;
s3: transferring the crosslinked carbon fiber into a cobalt-nickel composite plating solution, and carrying out surface cobalt-nickel plating treatment to obtain a modified carbon fiber;
the cobalt-nickel composite plating solution comprises the following components: 14mL of 5% ammonia water is taken as a solvent, and 1.5g of nickel sulfate, 1.5g of cobalt sulfate, 3g of sodium citrate and 1g of sodium hypophosphite are contained; the working conditions of the surface cobalt-nickel plating treatment are as follows: preserving heat at 80 ℃ for 20min;
s4: preparing protective coating by using amino hyperbranched polyamide, composite biomass porous carbon, flame retardant and aqueous epoxy resin;
the protective coating comprises the following components in parts by weight: 44 parts of waterborne epoxy resin, 6 parts of composite biomass porous carbon, 6 parts of amino hyperbranched polyamide and 4 parts of flame retardant; the flame retardant consists of diethyl aluminum phosphinate and melamine polyphosphate in a mass ratio of 2:1, compounding to obtain the compound;
the preparation of the composite biomass porous carbon comprises the following steps:
1) Cleaning pine nut shells, grinding, mixing 1g of pine nut shell powder and 1g of NaOH, ball milling for 20min, preserving heat at 600 ℃ for 80min under nitrogen atmosphere, and cleaning with 1mol/L hydrochloric acid until the pH is neutral to obtain biomass porous carbon;
2) Mixing 0.05mmol of zinc chloride, 0.05mmol of ferric chloride, 0.1g of 2, 5-dihydroxyterephthalic acid and 10mLN, N-dimethylformamide, adding 0.07g of biomass porous carbon and 10mL of sodium hydroxide, performing ultrasonic treatment for 20-30min, transferring into a reaction kettle, preserving heat at 150 ℃ for 22h, cooling, centrifuging, washing and drying to obtain composite biomass porous carbon;
s5: coating protective coating on the surface of the heat-shrinkable tube to form a protective layer, thereby obtaining a protective sleeve; the heat shrinkage pipe is polyethylene;
s6: the modified carbon fiber and the protective sleeve are sleeved outside the wire core in sequence, so that the engine wire harness with good shielding property is obtained.
Comparative example 1: with example 3 as a control group, the composite biomass porous carbon was replaced with biomass porous carbon, and the other procedures were normal.
Comparative example 2: with example 3 as a control group, no amino hyperbranched polyamide was introduced into the protective coating, and the other procedures were normal.
Comparative example 3: using example 3 as a control, no impregnating solution was prepared and the other procedures were normal.
Comparative example 4: with example 3 as a control group, no cobalt-nickel composite plating solution was prepared, and the other procedures were normal.
Comparative example 5: using example 3 as a control group, the modified carbon fiber was replaced with carbon fiber, and the other procedures were normal.
Examples and comparative examples: the core adopts copper-tin alloy (section area is 0.13 mm) 2 Tensile strength of 110N and tensile strength of 620N/mm 2 ) The thickness of the modified carbon fiber is 2mm, the thickness of the polyethylene pipe is 2mm, and the thickness of the protective layer is 0.5mm.
The raw material sources are as follows:
cystamine dihydrochloride C823838, acryloyl chloride A800376, aluminum diethylphosphinate A875851, melamine polyphosphate M859615: shanghai Miclin Biochemical technologies Co., ltd; carbon fiber (thickness of 1.5mm, square meter mass of 100 g/m) 2 Weaving by carbon fiber yarns, wherein the carbon fiber yarns are T700SC/T1000 GB: clamar); aqueous epoxy resin PC6317: han Gao Letai; pine nut shells: are commercially available; polyethylene pipe: is obtained by co-extrusion of high-density polyethylene particles, and is high-density polyethylene AS55-003: exxon (R); mitsubishi acid M110151, polyethylene glycol diglycidyl ether P134831, 2, 5-dihydroxyterephthalic acid D134233, zinc chloride Z112526, ferric chloride F419646, N-dimethylformamide D111999: ala Ding Shiji; 1-amino-4- (2-hydroxyethyl) piperazine 122963: merck reagent; sodium hydroxide, methylene chloride, methanol, ammonia water, nickel sulfate, cobalt sulfate, sodium citrate, sodium hypophosphite, analytically pure: national drug group reagent.
Performance test: performance tests were performed on the wire harnesses produced in examples 1 to 3 and comparative examples 1 to 5:
electromagnetic shielding performance test: testing by adopting a vector line analyzer, wherein the testing method is a coaxial method, and the range is 2-18GHz;
flame retardancy: testing with reference to UL-94 vertical burn rating;
self-repairability: scratch with the length of 0.1mm and the depth of 0.1mm is marked on the surface of the protective sleeve, the protective sleeve is insulated for 2 hours at 50 ℃, and the repair rate is observed under a microscope, and the result is shown in the table below;
average shielding effectiveness (dB) Flame retardancy Self-repairing (%)
Example 1 64.1 V-0 100
Example 2 66.5 V-0 100
Example 3 68.7 V-0 100
Comparative example 1 45.6 V-1 89
Comparative example 2 53.3 V-1 60
Comparative example 3 55.4 / /
Comparative example 4 49.3 / /
Comparative example 5 46.1 / /
As can be seen from the table, the average shielding effectiveness of the wire harness prepared in the embodiment 1-3 for 2-18GHz is higher than 64.1dB, the flame retardant grade is V-0, and the self-repairing rate is 100%, and the engine wire harness and the preparation method thereof provided by the invention have the advantages that the modified carbon fiber and the heat shrinkage tube coated with the protective coating are sleeved on the surface of the wire core, so that the excellent electromagnetic shielding performance, flame retardant performance and self-repairing performance are provided for the engine wire harness, and the service life of the engine wire harness is prolonged.
Comparing example 3 with comparative example 1, it is known that the composite biomass porous carbon is introduced into the protective coating to realize the efficient absorption of the thin layer of the protective layer, and when the thickness of the protective layer is 0.3-0.5mm, the efficient absorption performance of electromagnetic waves is still maintained; according to the invention, the biomass porous carbon is used as a carrier to load a bimetal zinc-iron MOF with 2, 5-dihydroxyterephthalic acid as a ligand, so as to obtain the composite biomass porous carbon; the bimetal zinc-iron MOF in the composite biomass porous carbon can effectively improve electromagnetic wave absorption performance, has a high specific surface area and a large number of porous structures, provides a plurality of microwave reflection points, is favorable for attenuation of microwave energy, and is introduced into the composite biomass porous carbon, wherein the bimetal zinc-iron MOF has a synergistic flame-retardant effect, and the flame-retardant capability of the protective layer is improved.
Comparing example 3 with comparative example 2, it is known that amino hyperbranched polyamide is introduced into the protective coating, the amino hyperbranched polyamide is generated by the reaction of N, N' -cystamine bisacrylamide and 1-amino-4- (2-hydroxyethyl) piperazine, and excellent self-repairing performance is endowed to the protective layer by means of coordination and hydrogen bonding of metal ions with amino groups, amide groups and piperazinyl groups in the protective coating, and meanwhile, the complexity of a crosslinked network in the protective layer is improved, and the wear resistance, flame retardance and electromagnetic shielding performance of the protective layer are improved.
As can be seen from comparing example 3 with comparative example 3, comparative example 4 and comparative example 5, pickling the carbon fiber with milbezier acid, improving the reactivity of the carbon fiber while not changing the characteristics of the carbon fiber itself, crosslinking the amino hyperbranched polyamide in a solvent with polyethylene glycol diglycidyl ether, impregnating to cure the crosslinked dendrimer on the surface of the carbon fiber through hydrogen bonding, and then plating the surface of the carbon fiber with a cobalt-nickel composite plating solution to form a neat array of cobalt-nickel, thereby improving the electromagnetic shielding property and flame retardance.
The foregoing description is only exemplary embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims (10)

1. The preparation method of the engine wire harness with good shielding performance is characterized by comprising the following steps of:
s1: preparing amino hyperbranched polyamide;
s2: acidizing the carbon fiber by using Mi's acid; preparing an impregnating solution by using amino hyperbranched polyamide and polyethylene glycol diglycidyl ether, and carrying out impregnation treatment on the acidified carbon fiber to obtain a crosslinked carbon fiber;
s3: transferring the crosslinked carbon fiber into a cobalt-nickel composite plating solution, and carrying out surface cobalt-nickel plating treatment to obtain a modified carbon fiber;
s4: preparing protective coating by using amino hyperbranched polyamide, composite biomass porous carbon, flame retardant and aqueous epoxy resin;
s5: coating protective coating on the surface of the heat-shrinkable tube to form a protective layer, thereby obtaining a protective sleeve;
s6: the modified carbon fiber and the protective sleeve are sleeved outside the wire core in sequence, so that the engine wire harness with good shielding property is obtained.
2. The preparation method of the engine wire harness with good shielding performance according to claim 1, which is characterized in that the protective coating comprises the following components in parts by weight: 36-44 parts of aqueous epoxy resin, 2-6 parts of composite biomass porous carbon, 2-6 parts of amino hyperbranched polyamide and 2-4 parts of flame retardant.
3. The preparation method of the engine wire harness with good shielding performance according to claim 1, wherein in the protective coating, the flame retardant comprises aluminum diethyl phosphinate and melamine polyphosphate in a mass ratio of 2:1, and compounding to obtain the product.
4. The method for manufacturing the engine wire harness with good shielding performance according to claim 1, wherein the heat shrinkage tube is one of polyvinyl chloride, polyethylene and polytetrafluoroethylene.
5. The method for producing an engine harness with good shielding property according to claim 1, wherein the production of the amino hyperbranched polyamide comprises the steps of: mixing and stirring cystamine dihydrochloride and deionized water, adding mixed solution of sodium hydroxide, acryloyl chloride and methylene dichloride at 0 ℃, stirring for 1-2h, filtering and drying to obtain N, N' -cystamine bisacrylamide; mixing N, N' -cystamine bisacrylamide with 1-amino-4- (2-hydroxyethyl) piperazine, adding a mixed solution of methanol and deionized water, and preserving the temperature for 1-2d at 50 ℃ to obtain the amino hyperbranched polyamide.
6. The method for manufacturing an engine wire harness with good shielding property according to claim 1, wherein the working conditions of the acidification treatment are as follows: ultrasonic soaking with 8-10% Michaelis acid for 1-2 hr.
7. The method for producing an engine harness with good shielding property according to claim 1, wherein the production of the crosslinked carbon fiber comprises the steps of: mixing the amino hyperbranched polyamide and methanol, heating to 55-60 ℃, adding polyethylene glycol diglycidyl ether, preserving heat for 5-6h, cooling to 18-25 ℃ to obtain an impregnating solution, adding acidified carbon fiber, and carrying out impregnation treatment for 1h to obtain the crosslinked carbon fiber.
8. The method for manufacturing an engine wire harness with good shielding performance according to claim 1, wherein the cobalt-nickel composite plating solution comprises the following components: taking 14mL of ammonia water as a solvent, wherein the solvent contains 1.5g of nickel sulfate, 1.5g of cobalt sulfate, 3g of sodium citrate and 1g of sodium hypophosphite; the working conditions of the surface cobalt-nickel plating treatment are as follows: the temperature is 75-80 ℃, and the heat preservation time is 20-25min.
9. The method for preparing the engine wire harness with good shielding performance according to claim 1, wherein the preparation of the composite biomass porous carbon comprises the following steps:
1) Cleaning pine nut shells, grinding, mixing and ball milling pine nut shell powder and sodium hydroxide for 15-20min, preserving heat for 80-90min at 590-600 ℃ under nitrogen atmosphere, and cleaning with hydrochloric acid until the pH is neutral to obtain biomass porous carbon;
2) Mixing zinc chloride, ferric chloride, 2, 5-dihydroxyterephthalic acid and N, N-dimethylformamide, adding biomass porous carbon and sodium hydroxide, performing ultrasonic treatment for 20-30min, transferring into a reaction kettle, preserving heat at 145-150 ℃ for 22-24h, cooling, centrifuging, washing and drying to obtain the composite biomass porous carbon.
10. An engine wire harness with good shielding property, which is characterized by being prepared by the preparation method of any one of claims 1-9.
CN202310357304.2A 2023-04-06 2023-04-06 Engine wire harness with good shielding property and preparation method thereof Active CN116598075B (en)

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Publication number Priority date Publication date Assignee Title
WO2015143167A1 (en) * 2014-03-19 2015-09-24 Advanced Green Technologies, Llc Self-healing cable
CN109021421A (en) * 2018-05-31 2018-12-18 广东安普智信电气有限公司 A kind of electromagnetic shielding material and preparation method thereof and cable protection pipe obtained
CN111029023A (en) * 2019-12-16 2020-04-17 东莞市领亚智能科技有限公司 Vulcanization-free rubber insulated cable
CN114790658A (en) * 2022-04-25 2022-07-26 浙江理工大学 Preparation method of self-repairing electromagnetic shielding coating fabric in high-temperature environment
CN115011070A (en) * 2022-06-08 2022-09-06 刘露兰 Electromagnetic shielding optical cable and preparation method thereof

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US8624118B2 (en) * 2005-10-19 2014-01-07 University Of Dayton Water-soluble polymer coating for use on electrical wiring

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015143167A1 (en) * 2014-03-19 2015-09-24 Advanced Green Technologies, Llc Self-healing cable
CN109021421A (en) * 2018-05-31 2018-12-18 广东安普智信电气有限公司 A kind of electromagnetic shielding material and preparation method thereof and cable protection pipe obtained
CN111029023A (en) * 2019-12-16 2020-04-17 东莞市领亚智能科技有限公司 Vulcanization-free rubber insulated cable
CN114790658A (en) * 2022-04-25 2022-07-26 浙江理工大学 Preparation method of self-repairing electromagnetic shielding coating fabric in high-temperature environment
CN115011070A (en) * 2022-06-08 2022-09-06 刘露兰 Electromagnetic shielding optical cable and preparation method thereof

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