CN116759148A - Crosslinked polyethylene insulation corrosion-resistant power cable and production process thereof - Google Patents
Crosslinked polyethylene insulation corrosion-resistant power cable and production process thereof Download PDFInfo
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- CN116759148A CN116759148A CN202310665197.XA CN202310665197A CN116759148A CN 116759148 A CN116759148 A CN 116759148A CN 202310665197 A CN202310665197 A CN 202310665197A CN 116759148 A CN116759148 A CN 116759148A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 25
- 238000005260 corrosion Methods 0.000 title claims abstract description 25
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 23
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title abstract description 8
- 238000009413 insulation Methods 0.000 title description 3
- -1 polyethylene Polymers 0.000 claims abstract description 29
- 239000004698 Polyethylene Substances 0.000 claims abstract description 28
- 229920000573 polyethylene Polymers 0.000 claims abstract description 28
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 26
- 239000003822 epoxy resin Substances 0.000 claims abstract description 22
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 22
- 239000011241 protective layer Substances 0.000 claims abstract description 22
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010410 layer Substances 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 9
- 229960003638 dopamine Drugs 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 7
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000010992 reflux Methods 0.000 claims description 20
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 18
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 16
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 14
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 238000004821 distillation Methods 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 8
- LBKDGROORAKTLC-UHFFFAOYSA-N 1,5-dichloropentane Chemical compound ClCCCCCCl LBKDGROORAKTLC-UHFFFAOYSA-N 0.000 claims description 7
- LHIJANUOQQMGNT-UHFFFAOYSA-N aminoethylethanolamine Chemical compound NCCNCCO LHIJANUOQQMGNT-UHFFFAOYSA-N 0.000 claims description 7
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 7
- 239000004800 polyvinyl chloride Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- MNWFXJYAOYHMED-UHFFFAOYSA-N heptanoic acid Chemical compound CCCCCCC(O)=O MNWFXJYAOYHMED-UHFFFAOYSA-N 0.000 claims description 6
- MQWCQFCZUNBTCM-UHFFFAOYSA-N 2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methylphenyl)sulfanyl-4-methylphenol Chemical compound CC(C)(C)C1=CC(C)=CC(SC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O MQWCQFCZUNBTCM-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- AWQSAIIDOMEEOD-UHFFFAOYSA-N 5,5-Dimethyl-4-(3-oxobutyl)dihydro-2(3H)-furanone Chemical compound CC(=O)CCC1CC(=O)OC1(C)C AWQSAIIDOMEEOD-UHFFFAOYSA-N 0.000 claims description 4
- 239000012295 chemical reaction liquid Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000002390 rotary evaporation Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000013538 functional additive Substances 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 15
- 238000004132 cross linking Methods 0.000 abstract description 12
- 238000005336 cracking Methods 0.000 abstract description 6
- 230000006353 environmental stress Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 5
- 229920001684 low density polyethylene Polymers 0.000 description 6
- 239000004702 low-density polyethylene Substances 0.000 description 6
- 150000003254 radicals Chemical class 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 229920001690 polydopamine Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 150000003242 quaternary ammonium salts Chemical group 0.000 description 2
- KNKRKFALVUDBJE-UHFFFAOYSA-N 1,2-dichloropropane Chemical compound CC(Cl)CCl KNKRKFALVUDBJE-UHFFFAOYSA-N 0.000 description 1
- 241000228245 Aspergillus niger Species 0.000 description 1
- 241000079253 Byssochlamys spectabilis Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000235395 Mucor Species 0.000 description 1
- 241001136494 Talaromyces funiculosus Species 0.000 description 1
- 241000223262 Trichoderma longibrachiatum Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 230000001857 anti-mycotic effect Effects 0.000 description 1
- 239000002543 antimycotic Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000002636 imidazolinyl group Chemical group 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005956 quaternization reaction Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- 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
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a crosslinked polyethylene insulated corrosion-resistant power cable and a production process thereof, which belong to the technical field of cable manufacture, and comprise a copper core inner conductor, an insulating layer and a protective layer which are sequentially arranged from inside to outside, and are characterized in that the protective layer is prepared by processing the following raw materials in parts by weight: 100 parts of polyethylene, 20-30 parts of epoxy resin, 1-3 parts of cross-linking agent, 0.2-0.5 part of antioxidant, 1-2 parts of adhesive and 3-5 parts of functional auxiliary agent, the interfacial compatibility of the polyethylene and the epoxy resin is improved by adding the adhesive dopamine, and the polyethylene cross-linking is promoted and the epoxy resin compatibility is improved by adding the functional auxiliary agent in the polyethylene cross-linking process, so that the protective layer material is endowed with excellent environmental stress cracking resistance, chemical corrosion resistance, creep resistance, insulating property and moisture and mildew resistance, the cable can be well protected, and the use safety of the cable is improved.
Description
Technical Field
The invention belongs to the technical field of cable manufacture, and particularly relates to a crosslinked polyethylene insulated corrosion-resistant power cable and a production process thereof.
Background
The cable is widely applied to industries such as metallurgy, electric power, ships, automobile manufacturing and the like. The cable insulating layer is wrapped outside the conductor and can play a role in insulating and protecting the inner conductor, the quality of the cable depends on the insulating property, corrosion resistance and mechanical property of the insulating layer, and polyethylene is a common material used as the cable insulating layer.
The low-density polyethylene is the lightest one in polyethylene series, also called low-pressure polyethylene, and has the structural characteristics of nonlinearity, lower crystallinity and softening point, better softness, elongation, electrical insulation, transparency and higher impact resistance. Low density polyethylene has poor mechanical strength and low heat resistance, and in addition, a significant weakness is poor environmental stress cracking resistance, which can be improved by crosslinking the polyethylene and compounding with other materials.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a crosslinked polyethylene insulated corrosion-resistant power cable and a production process thereof.
According to the invention, the crosslinked polyethylene and the epoxy resin material are used as the outermost protective layer of the cable, the dopamine is added to improve the interface compatibility of the polyethylene and the epoxy resin, and the functional auxiliary agent is added in the polyethylene crosslinking process to promote the polyethylene crosslinking and improve the epoxy resin compatibility, so that the protective layer material is endowed with excellent environmental stress cracking resistance, chemical corrosion resistance, creep resistance and insulating property, the cable can be well protected, the use safety of the cable is improved, the quaternary ammonium salt structure in the functional auxiliary agent has an antibacterial effect, and the dampproof and mildew-proof properties of the cable are improved.
The aim of the invention can be achieved by the following technical scheme:
a crosslinked polyethylene insulated corrosion-resistant power cable comprises a copper core inner conductor, an insulating layer and a protective layer which are sequentially arranged from inside to outside.
Further, the insulating layer is made of polyvinyl chloride.
Further, the protective layer is prepared from the following raw materials in parts by weight: 100 parts of polyethylene, 20-30 parts of epoxy resin, 1-3 parts of cross-linking agent, 0.2-0.5 part of antioxidant, 1-2 parts of adhesive and 3-5 parts of functional auxiliary agent.
Further, the polyethylene used is a low density polyethylene.
Further, the crosslinker used is DCP.
Further, the antioxidant used is antioxidant 2246-S.
Further, the binder used is dopamine.
Further, the functional auxiliary agent used is prepared by the following steps:
s1, adding hydroxyethyl ethylenediamine into a flask, adding dimethylbenzene serving as a water carrying agent, dropwise adding heptanoic acid, controlling the heating temperature to 140 ℃ after the dropwise adding, and carrying out reflux reaction for 4 hours; then heating to 210 ℃, carrying out reflux reaction for 4 hours, and carrying out reduced pressure distillation on the reaction liquid after the reaction is finished to remove unreacted raw materials and dimethylbenzene to obtain an intermediate 1; the dosage ratio of the hydroxyethyl ethylenediamine to the xylene to the heptanoic acid is 10g to 2mL to 12.5g;
the hydroxyethyl ethylenediamine is amidated and dehydrated with heptanoic acid at 140 ℃, and then cyclized and dehydrated at 210 ℃ to obtain an intermediate 1, and the specific reaction process is as follows:
s2, adding the intermediate 1 and 1, 5-dichloropentane into a flask, adding absolute ethyl alcohol as a solvent, controlling the heating temperature to be 80 ℃, carrying out reflux reaction for 4 hours, carrying out reduced pressure distillation to remove the solvent after the reaction is finished, and recrystallizing with acetone for 2 times to obtain an intermediate 2; the dosage ratio of the intermediate 1 to the 1, 5-dichloropentane to the absolute ethyl alcohol is 10g to 3.5g to 100mL;
controlling the mol ratio of the intermediate 1 to the 1, 5-dichloropentane to be 2:1, and carrying out alkylation reaction on tertiary nitrogen on the molecule of the intermediate 1 and the dichloropropane to obtain a quaternization product, wherein the specific reaction process is as follows:
s3, placing the intermediate 2 in a three-neck flask with a thermometer, a water separator and a reflux condenser, adding toluene as a solvent, then adding p-toluenesulfonic acid, acrylic acid and hydroquinone, setting the heating temperature to 110 ℃ for reflux reaction for 8 hours, and removing the redundant solvent by reduced pressure rotary evaporation to obtain a functional auxiliary agent; the dosage ratio of the intermediate 2, toluene, p-toluenesulfonic acid, acrylic acid and hydroquinone is 10g to 100mL to 0.4g to 3g to 0.01g;
the mol ratio of the intermediate 2 to the acrylic acid is controlled to be 1:2, p-toluenesulfonic acid is used as a catalyst, hydroquinone is used as a polymerization inhibitor, hydroxyl on the intermediate 2 and the acrylic acid are subjected to esterification reaction to obtain a functional auxiliary agent, and the specific reaction process is as follows:
in the process of polyethylene heating and crosslinking, a crosslinking agent DCP is thermally decomposed to generate an alkoxy free radical, the alkoxy free radical chain is transferred to react with a polyethylene macromolecular chain to deprive hydrogen atoms on the molecular chain to generate the polyethylene macromolecular chain free radical which has high reactivity, when two polyethylene macromolecular chain free radicals meet, molecular chain growth crosslinking is formed, a functional auxiliary agent is added in the process, a carbon-carbon double bond functional group is introduced, the functional auxiliary agent can react with the polyethylene macromolecular chain free radical generated by the hydrogen deprivation reaction rapidly, the reaction is faster than the polyethylene macromolecular chain growth crosslinking reaction, the generated free radical is more stable, the consumption of the DCP is reduced, the crosslinking efficiency is improved, and the environmental stress cracking resistance, the chemical corrosion resistance, the creep resistance and the insulativity of the polyethylene are improved.
The protective layer is gradually permeated after being immersed in water, the process is rapidly accelerated under the condition of poor water quality (acid or alkali solution, chloride, organic matter corrosive liquid and the like), so that electrolysis and chemical corrosion occur in the cable, insulation breakdown is finally caused, the formation of a cross-linked network structure is promoted by the functional auxiliary agent, and the waterproof property of the protective layer is improved.
In the mixing process, dopamine is easy to oxidize and self-polymerize to form polydopamine, the polydopamine has strong adhesiveness, the-NH and-OH groups in the polydopamine can improve the two-phase surface activity of the crosslinked polyethylene and the epoxy resin, the imidazoline structure in the functional auxiliary agent has good compatibility with the epoxy resin, the functional auxiliary agent has certain surface activity, the epoxy resin can be emulsified, the compatibility of the crosslinked polyethylene and the epoxy resin is improved by combining the two components, the coefficient of linear expansion of the epoxy resin is small, and the environmental stress cracking resistance of the cable protective layer is improved. The quaternary ammonium salt structure in the functional auxiliary agent has an antibacterial effect, and the moistureproof and mildew-proof properties of the cable are improved.
Another object of the present invention is to provide a process for producing a crosslinked polyethylene insulated corrosion-resistant power cable, comprising the steps of;
firstly, placing polyvinyl chloride granules into an internal mixer for banburying, feeding the mixed granules into an extruder after the mixing is finished, extruding and coating the granules on a soft copper conductor to form an insulating layer;
and secondly, adding polyethylene, epoxy resin and functional additives into an internal mixer according to a proportion, heating and banburying for 5min, then adding a cross-linking agent, an antioxidant and an adhesive and banburying for 3min, putting the mixture into a double-cone feeding single-screw machine for plasticizing and granulating, cooling, and then sending the granules into an extruder to extrude and coat the outer surface of the insulating layer to form a protective layer, thus obtaining the cross-linked polyethylene insulating corrosion-resistant power cable.
The invention has the beneficial effects that:
according to the invention, polyethylene is crosslinked and compounded with epoxy resin to be used as a cable protective layer material, the adhesive dopamine is added to improve the interface compatibility of the polyethylene and the epoxy resin, and a functional auxiliary agent is added in the polyethylene crosslinking process to promote the polyethylene crosslinking and improve the epoxy resin compatibility, so that the protective layer material is endowed with excellent environmental stress cracking resistance, chemical corrosion resistance, creep resistance, insulating property and dampproof and mildew-proof properties, the cable can be well protected, and the use safety of the cable is improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, 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.
Example 1
Preparation of functional auxiliary agent
S1, adding 10g of hydroxyethyl ethylenediamine into a flask, adding 100mL of dimethylbenzene serving as a water carrying agent, dropwise adding 12.5g of heptanoic acid, controlling the heating temperature to 140 ℃ after the dropwise adding is finished, and carrying out reflux reaction for 4 hours; then heating to 210 ℃, carrying out reflux reaction for 4 hours, and carrying out reduced pressure distillation on the reaction liquid after the reaction is finished to remove unreacted raw materials and dimethylbenzene to obtain an intermediate 1;
s2, adding 10g of the intermediate 1 and 5.5g of 1, 5-dichloropentane into a flask, adding 100mL of absolute ethyl alcohol serving as a solvent, controlling the heating temperature to be 80 ℃, carrying out reflux reaction for 4 hours, removing the solvent by reduced pressure distillation after the reaction is finished, and recrystallizing with acetone for 2 times to obtain an intermediate 2;
s3, placing 10g of the intermediate 2 into a three-necked flask with a thermometer, a water knockout drum and a reflux condenser, adding 100mL of toluene as a solvent, then adding 0.4g of p-toluenesulfonic acid, 3g of acrylic acid and 0.01g of hydroquinone, setting the heating temperature to 110 ℃ for reflux reaction for 8 hours, and removing the redundant solvent by reduced pressure rotary evaporation to obtain the functional auxiliary agent.
Example 2
Preparation of functional auxiliary agent
S1, adding 20g of hydroxyethyl ethylenediamine into a flask, adding 200mL of dimethylbenzene serving as a water carrying agent, dropwise adding 25g of heptanoic acid, controlling the heating temperature to 140 ℃ after the dropwise adding, and carrying out reflux reaction for 4 hours; then heating to 210 ℃, carrying out reflux reaction for 4 hours, and carrying out reduced pressure distillation on the reaction liquid after the reaction is finished to remove unreacted raw materials and dimethylbenzene to obtain an intermediate 1;
s2, adding 20g of the intermediate 1 and 11g of 1, 5-dichloropentane into a flask, adding 200mL of absolute ethyl alcohol serving as a solvent, controlling the heating temperature to be 80 ℃, carrying out reflux reaction for 4 hours, carrying out reduced pressure distillation to remove the solvent after the reaction is finished, and recrystallizing with acetone for 2 times to obtain an intermediate 2;
s3, placing 20g of the intermediate 2 into a three-necked flask with a thermometer, a water knockout drum and a reflux condenser, adding 200mL of toluene as a solvent, then adding 0.8g of p-toluenesulfonic acid, 6g of acrylic acid and 0.02g of hydroquinone, setting the heating temperature to 110 ℃ for reflux reaction for 8 hours, and removing the redundant solvent by reduced pressure rotary evaporation to obtain the functional auxiliary agent.
Example 3
1000g of low-density polyethylene, 200g of epoxy resin and 30g of the functional auxiliary agent prepared in the embodiment 1 are proportionally added into an internal mixer, heated and banburying for 5min, then 10g of a cross-linking agent DCP, 2g of an antioxidant 2246-S and 10g of adhesive dopamine are added into the internal mixer for banburying for 3min, and the mixture is put into a double-cone feeding single screw machine for plasticizing, granulating and cooling to obtain the protective layer material.
Example 4
1000g of low-density polyethylene, 250g of epoxy resin and 40g of the functional auxiliary agent prepared in the embodiment 2 are added into an internal mixer in proportion, heating and banburying are carried out for 5min, then 20g of a cross-linking agent DCP, 3.5g of an antioxidant 2246-S and 15g of adhesive dopamine are added into the internal mixer for banburying for 3min, and the mixture is put into a double-cone feeding single screw machine for plasticizing, granulating and cooling to obtain the protective layer material.
Example 5
1000g of low-density polyethylene, 300g of epoxy resin and 50g of the functional auxiliary agent prepared in the embodiment 1 are proportionally added into an internal mixer, heated and banburying for 5min, then 30g of a cross-linking agent DCP, 5g of an antioxidant 2246-S and 20g of adhesive dopamine are added into the internal mixer for banburying for 3min, and the mixture is put into a double-cone feeding single screw machine for plasticizing, granulating and cooling to obtain the protective layer material.
The protective layer materials obtained in examples 3 to 5 were subjected to the following performance tests: tensile breaking strength and tensile elongation at break were tested according to standard GB 1040-79; volume resistivity was measured according to standard GB/T1410-2006; the antimycotic performance was tested according to standard GB/T24128-2018, mainly test strains: aspergillus niger ATCC6275, paecilomyces variotii CBS628.66, penicillium funiculosum ATCC9644, trichoderma longibrachiatum ATCC13631 and Mucor globosus ATCC6205;
| example 3 | Example 4 | Example 5 | |
| Tensile breaking strength/MPa | 23.8 | 22.8 | 23.6 |
| Elongation at break/% | 460 | 475 | 483 |
| Volume resistivity/Ω·m | 1×10 14 -1×10 15 | 1×10 14 -1×10 15 | 1×10 14 -1×10 15 |
| Mold growth | No growth | No growth | No growth |
As can be seen from the data in the table, the crosslinked polyethylene material obtained by the invention has good mechanical property, insulating property and antibacterial property through the promotion of functional auxiliary agent on polyethylene crosslinking and the curing of epoxy resin.
Example 6
Firstly, placing polyvinyl chloride into an internal mixer for banburying, feeding the mixed polyvinyl chloride into an extruder after the mixing is finished, extruding and coating the polyvinyl chloride on a soft copper conductor to form an insulating layer;
and secondly, sending the protective layer material prepared in the embodiment 3 into an extruder to extrude and coat the outer surface of the insulating layer to form a protective layer, thus obtaining the crosslinked polyethylene insulating corrosion-resistant power cable.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (9)
1. The crosslinked polyethylene insulated corrosion-resistant power cable comprises a copper core inner conductor, an insulating layer and a protective layer which are sequentially arranged from inside to outside, and is characterized in that the protective layer is prepared by processing the following raw materials in parts by weight: 100 parts of polyethylene, 20-30 parts of epoxy resin, 1-3 parts of cross-linking agent, 0.2-0.5 part of antioxidant, 1-2 parts of adhesive and 3-5 parts of functional auxiliary agent;
wherein, the functional auxiliary agent is prepared by the following steps:
s1, adding hydroxyethyl ethylenediamine into a flask, adding dimethylbenzene serving as a water carrying agent, dropwise adding heptanoic acid, controlling the heating temperature to 140 ℃ after the dropwise adding, and carrying out reflux reaction for 4 hours; then heating to 210 ℃, carrying out reflux reaction for 4 hours, and carrying out reduced pressure distillation on the reaction liquid after the reaction is finished to remove unreacted raw materials and dimethylbenzene to obtain an intermediate 1;
s2, adding the intermediate 1 and 1, 5-dichloropentane into a flask, adding absolute ethyl alcohol as a solvent, controlling the heating temperature to be 80 ℃, carrying out reflux reaction for 4 hours, carrying out reduced pressure distillation to remove the solvent after the reaction is finished, and recrystallizing with acetone for 2 times to obtain an intermediate 2;
s3, placing the intermediate 2 in a three-neck flask with a thermometer, a water separator and a reflux condenser, adding toluene as a solvent, then adding p-toluenesulfonic acid, acrylic acid and hydroquinone, setting the heating temperature to 110 ℃ for reflux reaction for 8 hours, and removing the redundant solvent by reduced pressure rotary evaporation to obtain the functional auxiliary agent.
2. The crosslinked polyethylene insulated corrosion-resistant power cable according to claim 1, wherein the amount of hydroxyethyl ethylenediamine, xylene, heptanoic acid used in step S1 is 10 g/2 ml/12.5 g.
3. The crosslinked polyethylene insulated corrosion-resistant power cable according to claim 1, wherein the ratio of the amounts of intermediate 1, 5-dichloropentane, absolute ethanol used in step S2 is 10g:3.5g:100ml.
4. The crosslinked polyethylene insulated corrosion-resistant power cable according to claim 1, wherein the ratio of the amounts of intermediate 2, toluene, p-toluenesulfonic acid, acrylic acid, hydroquinone in step S3 is 10g:100ml:0.4g:3g:0.01g.
5. The crosslinked polyethylene insulated corrosion-resistant power cable according to claim 1, wherein the insulating layer is made of polyvinyl chloride and is coated on the surface of the copper core inner conductor.
6. A crosslinked polyethylene insulated corrosion resistant power cable according to claim 1 wherein the crosslinking agent used is DCP.
7. A crosslinked polyethylene insulated corrosion resistant power cable according to claim 1 wherein the antioxidant used is antioxidant 2246-S.
8. A crosslinked polyethylene insulated corrosion-resistant power cable according to claim 1, wherein the binder used is dopamine.
9. The process for producing a crosslinked polyethylene insulated corrosion-resistant power cable according to claim 1, comprising the steps of:
firstly, placing polyvinyl chloride granules into an internal mixer for banburying, feeding the mixed granules into an extruder after the mixing is finished, extruding and coating the granules on a soft copper conductor to form an insulating layer;
and secondly, adding polyethylene, epoxy resin and functional additives into an internal mixer according to a proportion, heating and banburying for 5min, then adding a cross-linking agent, an antioxidant and an adhesive and banburying for 3min, putting the mixture into a double-cone feeding single-screw machine for plasticizing and granulating, cooling, and then sending the granules into an extruder to extrude and coat the outer surface of the insulating layer to form a protective layer, thus obtaining the cross-linked polyethylene insulating corrosion-resistant power cable.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117624690A (en) * | 2023-12-15 | 2024-03-01 | 广东中讯通讯设备实业有限公司 | Corrosion-resistant PE cable duct and production process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117624690A (en) * | 2023-12-15 | 2024-03-01 | 广东中讯通讯设备实业有限公司 | Corrosion-resistant PE cable duct and production process thereof |
| CN117624690B (en) * | 2023-12-15 | 2024-05-03 | 广东中讯通讯设备实业有限公司 | Corrosion-resistant PE cable duct and production process thereof |
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