CN116003921A - PE/EPDM high-heat-conductivity insulating material for EV charging cable and preparation method - Google Patents
PE/EPDM high-heat-conductivity insulating material for EV charging cable and preparation method Download PDFInfo
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- CN116003921A CN116003921A CN202310132763.0A CN202310132763A CN116003921A CN 116003921 A CN116003921 A CN 116003921A CN 202310132763 A CN202310132763 A CN 202310132763A CN 116003921 A CN116003921 A CN 116003921A
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- 239000011810 insulating material Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000004698 Polyethylene Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 32
- 239000000945 filler Substances 0.000 claims abstract description 25
- 239000002131 composite material Substances 0.000 claims abstract description 22
- -1 polyethylene Polymers 0.000 claims abstract description 22
- 229920000573 polyethylene Polymers 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- 239000004014 plasticizer Substances 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims description 29
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 24
- 238000004073 vulcanization Methods 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000011787 zinc oxide Substances 0.000 claims description 12
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 9
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 claims description 9
- 235000021355 Stearic acid Nutrition 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000008117 stearic acid Substances 0.000 claims description 9
- 229910052582 BN Inorganic materials 0.000 claims description 8
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 6
- 230000003712 anti-aging effect Effects 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- ZRMMVODKVLXCBB-UHFFFAOYSA-N 1-n-cyclohexyl-4-n-phenylbenzene-1,4-diamine Chemical compound C1CCCCC1NC(C=C1)=CC=C1NC1=CC=CC=C1 ZRMMVODKVLXCBB-UHFFFAOYSA-N 0.000 claims description 3
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical compound C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 claims description 3
- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 claims description 3
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 3
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 239000008036 rubber plasticizer Substances 0.000 claims description 3
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 239000011231 conductive filler Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 229920000181 Ethylene propylene rubber Polymers 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000004513 sizing Methods 0.000 description 12
- 239000004594 Masterbatch (MB) Substances 0.000 description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 7
- IVIKIRMOUDAMAJ-UHFFFAOYSA-N 1-butylperoxybutane;1,2-di(propan-2-yl)benzene Chemical compound CCCCOOCCCC.CC(C)C1=CC=CC=C1C(C)C IVIKIRMOUDAMAJ-UHFFFAOYSA-N 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IPJGAEWUPXWFPL-UHFFFAOYSA-N 1-[3-(2,5-dioxopyrrol-1-yl)phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC(N2C(C=CC2=O)=O)=C1 IPJGAEWUPXWFPL-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000005325 percolation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002322 conducting polymer Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000002978 peroxides Chemical group 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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Abstract
The invention belongs to the technical field of preparation of heat-conducting composite materials, and relates to a PE/EPDM high-heat-conducting insulating material for EV charging cables and a preparation method thereof; the method comprises the steps of blending a heat-conducting filler into an ethylene-propylene-diene monomer rubber material, adding other auxiliary agents such as a plasticizer and the like to prepare ethylene-propylene-diene monomer rubber particles, blending the ethylene-propylene-diene monomer rubber particles with polyethylene, and forming a bicontinuous phase structure by the ethylene-propylene-diene monomer rubber particles and the polyethylene through formula design, wherein the heat-conducting filler is only wrapped in the ethylene-propylene-diene monomer rubber materialIn the ethylene propylene rubber, the heat conducting filler can form a more efficient heat conducting passage in the ethylene propylene diene monomer continuous phase, and the mechanical property of the material can be improved after polyethylene is added. The material of the invention has a heat conductivity coefficient of 1.03-1.29W/(m.K), a tensile strength of 8.47-10.92MPa and a volume resistance of 8.73X10 14 ‑9.24×10 14 Omega cm, can effectively improve the insulating heat dispersion of EV charging cable.
Description
Technical Field
The invention belongs to the technical field of preparation of heat-conducting composite materials, and particularly relates to a PE/EPDM high-heat-conducting insulating material for an EV charging cable and a preparation method thereof.
Background
At present, the new energy automobile in the domestic market has rapidly increased in conservation quantity. However, compared with the traditional fuel automobile, the new energy automobile still has the problem of low charging speed. To increase the charging speed, the cable charging current needs to be increased, but the heating value of the cable during the charging process is too high. The problem of low heat conduction performance of the polymer materials used in the cable insulation and sheath layers at present leads to the fact that heat emitted in the cable charging process cannot be timely transmitted, and further leads to the rise of the cable temperature, and influences the service life and safety in the use process, so that the heat conduction performance of the new energy charging pile cable material becomes a key problem for limiting the charging speed of a new energy automobile.
Ethylene propylene diene monomer and polyethylene are commonly used high polymer materials in cable insulation and sheath layers, and have good ageing resistance, heat resistance and electrical insulation properties. As a traditional polymer material, the thermal conductivity is poor, and the thermal conductivity coefficient is only 0.2-0.4W/(m.K). In order to improve the application of the material in the charging cable of the new energy automobile, the heat conduction performance of the material needs to be improved. At present, a method for filling high-heat-conductivity filler is mostly adopted in research on how to improve the heat-conductivity property of a high-polymer material, and the research shows that the heat-conductivity property of the composite material can be improved by improving the consumption of the heat-conductivity filler, but the mechanical property of the material can be drastically reduced by greatly improving the filling quantity of the filler in the material, so that the use requirements [ Yu Pinxuan, mao Lin, wang Jinge ] can not be met. The heat conducting network is formed by controlling the orientation distribution of the heat conducting filler in the composite material, so that the heat conducting property of the material can be greatly improved, and the high heat conducting polymer can be prepared under the condition of lower filling amount. The group Xia Ru of Anhui university adds the heat-conducting filler into the blending material, and the heat-conducting filler is only distributed in a certain continuous phase to form a double-percolation structure by controlling the process, so that the double-percolation structure is formed, high heat-conducting particles can be selectively distributed in one phase of the blending material, thereby forming a more efficient heat-conducting passage, improving the heat conductivity, effectively reducing the filling content of particles, and achieving the high heat-conducting composite material under the condition of low filling consumption, but the rest performances cannot meet the requirements of cable materials [ Polymer Testing,2019,78 (1), 105978]. At present, how to prepare a high-heat-conductivity insulating material meeting the requirements of a new energy automobile charging pile cable material is still a difficult problem, and the high-heat-conductivity performance can be achieved by adding high-filling heat-conductivity filler into a composite material, but other performances such as mechanics, insulation, aging resistance and the like are often difficult to meet application requirements.
Disclosure of Invention
The invention aims to overcome the defects of the existing filling type heat-conducting and insulating composite material preparation technology, the ethylene propylene diene monomer and polyethylene form a double continuous phase structure through formula design, and the preparation technology is controlled to enable the heat-conducting filler to be distributed in the ethylene propylene diene monomer continuous phase.
The aim of the invention is achieved by the following technical scheme:
the PE/EPDM high-heat-conductivity insulating material for the EV charging cable comprises the following components in parts by weight:
the preparation operation steps of the high-heat-conductivity insulating composite material are as follows:
s1) respectively weighing all materials according to a designed proportion, sequentially adding ethylene propylene diene monomer rubber, stearic acid, zinc oxide, a plasticizer and an anti-aging agent into an internal mixer for mixing, wherein the mixing temperature is 90-110 ℃, the mixing time is 3-5 min, then adding a heat conducting filler for continuous mixing for 1-2 min, and discharging rubber to obtain ethylene propylene diene monomer rubber;
s2) adding the polyethylene into an internal mixer for secondary mixing, wherein the mixing temperature is 120-140 ℃, the mixing time is 2-3 min, and then adding the ethylene-propylene-diene monomer prepared in the S1), continuing mixing for 3-5 min, and discharging the rubber;
s3) placing the rubber discharge in an open mill preheated to 90 ℃, sequentially adding an auxiliary vulcanizing agent and a vulcanizing agent, carrying out open mill for 1-2 min, and carrying out sheet discharging after the auxiliary agent is completely mixed into the rubber material, packaging for 10 times by a triangular bag and carrying out sheet discharging after 4 times of thin pass; the thin-pass is a thin-pass plasticating method, and particularly relates to a process for thinning rubber in the rubber open mill process.
S4) putting the rubber compound into a mould, putting the mould into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 160-180 ℃, and the heat and pressure are maintained for 15min, so that the heat-conducting and insulating composite material can be obtained after vulcanization.
The ethylene propylene diene monomer preferably has the ethylene content of 60-70 wt%, the Mooney viscosity value ML 1+4, the temperature of 100 ℃ of 40-50 and the content of the third monomer ENB of 3-5 wt%.
The polyethylene preferably has a melt index of 2.0 to 2.5g/10min.
The plasticizer is preferably a paraffin-based rubber plasticizer, the viscosity (40 ℃) is more than 400 mPa.s, and the flash point is more than 240 ℃.
The antioxidant is preferably one or more of 2-mercaptobenzimidazole, 2, 4-trimethyl-1, 2-dihydroquinoline polymer and N-cyclohexyl-N' -phenyl p-phenylenediamine;
the heat-conducting filler is preferably one or more of aluminum oxide, magnesium oxide, zinc oxide, boron nitride and aluminum nitride;
the vulcanizing agent is peroxide vulcanizing agent, preferably one or more of dicumyl peroxide, amphiphobic butyl dicumyl peroxide, benzoyl peroxide and tert-butyl perbenzoate;
the auxiliary vulcanizing agent is preferably one or more of triallyl isocyanurate, triallyl cyanurate, N '-m-phenylene bismaleimide and N, N' -m-phenylene bismaleimide;
according to the formula design, the ethylene propylene diene monomer and polyethylene form a double continuous phase structure, and the preparation process is controlled to enable the heat conducting filler to be distributed in the ethylene propylene diene monomer continuous phase, and as the heat conducting filler is only dispersed in the ethylene propylene diene monomer continuous phase, the heat conducting filler can form a more efficient heat conducting passage in the ethylene propylene diene monomer continuous phase, so that the aim of obviously improving the heat conducting performance while ensuring the insulating performance of the composite material is fulfilled, the performance of the prepared composite material meets the performance requirement of an electric wire and cable insulating layer, and the preparation method of the high heat conducting insulating composite material for the electric wire and cable insulating layer can be widely applied to a direct current charging pile cable of a new energy automobile.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the distribution of the heat-conducting filler in the ethylene propylene diene monomer continuous phase is controlled through the formula and the process design, and the heat-conducting filler can form a more efficient heat-conducting passage in the heat-conducting filler, so that the prepared heat-conducting insulating composite material has better heat-conducting insulating performance;
2. the polymer-based composite material of the invention selects a polyethylene/ethylene propylene diene monomer blending system, thereby effectively solving the problem of poor mechanical property after the polymer-based composite material is added with high-filling heat-conducting filler, and the composite material still has better mechanical property when the high-filling heat-conducting filler is added;
3. the heat-conducting composite filler disclosed by the invention has the performance meeting the performance requirements of an electric wire insulating layer and an electric cable insulating layer, can be widely applied to a new energy automobile direct current charging pile cable, is simple in preparation process, and can be suitable for large-scale industrial production.
Drawings
Fig. 1 is a flow chart of a preparation method of a PE/EPDM high-thermal-conductivity insulating material for an EV charging cable.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
The invention relates to a PE/EPDM high heat conduction insulating material for an EV charging cable, which comprises the following components in parts by weight:
the ethylene propylene diene monomer is 60-70wt% of ethylene, the Mooney viscosity value ML 1+4, the temperature of 100 ℃ is 40-50, and the content of the third monomer ENB is 3-5wt%.
The melt index of the polyethylene is 2.0-2.5 g/10min.
The plasticizer is paraffin-based rubber plasticizer, the viscosity (40 ℃) is more than 400 mPa.s, and the flash point is more than 240 ℃.
The anti-aging agent is one or more of 2-mercaptobenzimidazole, 2, 4-trimethyl-1, 2-dihydroquinoline polymer and N-cyclohexyl-N' -phenyl p-phenylenediamine.
The heat conducting filler is one or more of aluminum oxide, magnesium oxide, zinc oxide, boron nitride and aluminum nitride.
The vulcanizing agent is one or more of dicumyl peroxide, amphiphobic butyl dicumyl peroxide, benzoyl peroxide and tert-butyl perbenzoate.
The vulcanization aid is one or more of triallyl isocyanurate, triallyl cyanurate, N '-m-phenylene bismaleimide and N, N' -m-phenylene bismaleimide.
The invention relates to a method for preparing the heat-conducting and insulating composite material, which specifically comprises the following steps:
s1) respectively weighing all materials according to a designed proportion, sequentially adding ethylene propylene diene monomer rubber, stearic acid, zinc oxide, a plasticizer and an anti-aging agent into an internal mixer for mixing, wherein the mixing temperature is 90-110 ℃, the mixing time is 3-5 min, then adding a heat conducting filler for continuous mixing for 1-2 min, and discharging rubber to obtain ethylene propylene diene monomer rubber;
s2) adding the polyethylene into an internal mixer for secondary mixing, wherein the mixing temperature is 120-140 ℃, the mixing time is 2-3 min, and then adding the ethylene-propylene-diene monomer prepared in the S1), continuing mixing for 3-5 min, and discharging the rubber;
s3) placing the rubber discharge in an open mill preheated to 90 ℃, sequentially adding an auxiliary vulcanizing agent and a vulcanizing agent, carrying out open mill for 1-2 min, and carrying out sheet discharging after the auxiliary agent is completely mixed into the rubber material, packaging for 10 times by a triangular bag and carrying out sheet discharging after 4 times of thin pass;
s4) putting the rubber compound into a mould, putting the mould into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 160-180 ℃, and the heat and pressure are maintained for 15min, so that the heat-conducting and insulating composite material can be obtained after vulcanization.
The thermal conductivity coefficient of the obtained thermal conductive and insulating composite material is 1.03-1.29W/(m.K), the tensile strength is 8.47-10.92MPa, and the volume resistance is 8.73X10 14 -9.24×10 14 Ω·cm。
Example 1
(1) 10.40 parts by mass of ethylene propylene diene monomer, 0.10 part by mass of stearic acid, 0.52 part by mass of zinc oxide, 3.1 parts by mass of TUDALEN 13 and 0.10 part by mass of 2-mercaptobenzimidazole are sequentially added into an internal mixer to be banburying for 3min at 100 ℃, 75.00 parts by mass of aluminum oxide is added to be continuously mixed for 1min, and rubber is discharged to obtain the ethylene propylene diene monomer.
(2) 10.40 parts by mass of polyethylene is added into an internal mixer, mixed for 3 minutes at 130 ℃, 89.22 parts by mass of ethylene propylene diene monomer masterbatch is added, mixed for 3 minutes, and then the mixture is discharged.
(3) And (3) placing the discharged sizing material in a 90 ℃ open mill, sequentially adding 0.16 part by mass of amphiphobic butyl peroxide diisopropylbenzene and 0.22 part by mass of triallyl isocyanurate, and carrying out triangular wrapping for 10 times after the auxiliary agent is completely mixed into the sizing material, and carrying out sheet discharging after 4 times of thin passing. And (3) putting the rubber compound into a die, putting the die into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 170 ℃, the temperature and the pressure are maintained for 15min, and opening the die and taking out after the vulcanization is completed.
Example 2
(1) 12.47 parts by mass of ethylene propylene diene monomer, 0.13 part by mass of stearic acid, 0.62 part by mass of zinc oxide, 3.74 parts by mass of TUDALEN 13 and 0.13 part by mass of 2-mercaptobenzimidazole are sequentially added into an internal mixer to be banburying for 3min at 100 ℃, 70.00 parts by mass of boron nitride is added to be continuously mixed for 1min, and rubber is discharged to obtain the ethylene propylene diene monomer.
(2) 12.47 parts by mass of polyethylene is added into an internal mixer, mixed for 3 minutes at 100 ℃, 87.09 parts by mass of ethylene propylene diene monomer masterbatch is added for continuous mixing for 3 minutes, and then the masterbatch is discharged.
(3) And (3) placing the discharged sizing material in a 90 ℃ open mill, sequentially adding 0.19 part by mass of amphiphobic butyl peroxide diisopropylbenzene and 0.25 part by mass of triallyl isocyanurate, and carrying out triangular wrapping for 10 times after the auxiliary agent is completely mixed into the sizing material, and carrying out sheet discharging after 4 times of thin passing. And (3) putting the rubber compound into a die, putting the die into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 160-180 ℃, and the temperature and pressure are maintained for 15min, and opening the die and taking out after the vulcanization is completed.
Example 3
(1) 10.40 parts by mass of ethylene propylene diene monomer, 0.10 part by mass of stearic acid, 0.52 part by mass of zinc oxide, 3.10 parts by mass of TUDALEN 13 and 0.10 part by mass of 2-mercaptobenzimidazole are sequentially added into an internal mixer to be banburying for 3min at 100 ℃, 20.00 parts by mass of boron nitride and 55.00 parts by mass of aluminum oxide are sequentially added to be continuously mixed for 1min, and rubber is discharged to obtain the ethylene propylene diene monomer.
(2) 10.40 parts by mass of polyethylene is added into an internal mixer, mixed for 3 minutes at 100 ℃, 89.22 parts by mass of ethylene propylene diene monomer masterbatch is added, mixed for 3 minutes, and then the mixture is discharged.
(3) And (3) placing the discharged sizing material in a 90 ℃ open mill, sequentially adding 0.16 part by mass of amphiphobic butyl peroxide diisopropylbenzene and 0.22 part by mass of triallyl isocyanurate, and carrying out triangular wrapping for 10 times after the auxiliary agent is completely mixed into the sizing material, and carrying out sheet discharging after 4 times of thin passing. And (3) putting the rubber compound into a die, putting the die into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 160-180 ℃, and the temperature and pressure are maintained for 15min, and opening the die and taking out after the vulcanization is completed.
Example 4
(1) 10.40 parts by mass of ethylene propylene diene monomer, 0.10 part by mass of stearic acid, 0.52 part by mass of zinc oxide, 3.10 parts by mass of TUDALEN 13 and 0.10 part by mass of 2-mercaptobenzimidazole are sequentially added into an internal mixer to be banburying for 3min at 100 ℃, 25.00 parts by mass of boron nitride and 50.00 parts by mass of aluminum oxide are sequentially added to be continuously mixed for 1min, and rubber is discharged to obtain the ethylene propylene diene monomer.
(2) 10.40 parts by mass of polyethylene is added into an internal mixer, mixed for 3 minutes at 100 ℃, 89.22 parts by mass of ethylene propylene diene monomer masterbatch is added, mixed for 3 minutes, and then the mixture is discharged.
(3) And (3) placing the discharged sizing material in a 90 ℃ open mill, sequentially adding 0.16 part by mass of amphiphobic butyl peroxide diisopropylbenzene and 0.22 part by mass of triallyl isocyanurate, and carrying out triangular wrapping for 10 times after the auxiliary agent is completely mixed into the sizing material, and carrying out sheet discharging after 4 times of thin passing. And (3) putting the rubber compound into a die, putting the die into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 160-180 ℃, and the temperature and pressure are maintained for 15min, and opening the die and taking out after the vulcanization is completed.
Example 5
(1) 12.47 parts by mass of ethylene propylene diene monomer, 0.13 part by mass of stearic acid, 0.62 part by mass of zinc oxide, 3.74 parts by mass of TUDALEN 13 and 0.13 part by mass of 2-mercaptobenzimidazole are sequentially added into an internal mixer to be banburying for 3min at 100 ℃, 20.00 parts by mass of boron nitride and 50.00 parts by mass of aluminum oxide are sequentially added to be continuously mixed for 1min, and rubber is discharged to obtain the ethylene propylene diene monomer.
(2) 12.47 parts by mass of polyethylene is added into an internal mixer, mixed for 3 minutes at 100 ℃, 87.09 parts by mass of ethylene propylene diene monomer masterbatch is added for continuous mixing for 3 minutes, and then the masterbatch is discharged.
(3) And (3) placing the discharged sizing material in a 90 ℃ open mill, sequentially adding 0.19 part by mass of amphiphobic butyl peroxide diisopropylbenzene and 0.25 part by mass of triallyl isocyanurate, and carrying out triangular wrapping for 10 times after the auxiliary agent is completely mixed into the sizing material, and carrying out sheet discharging after 4 times of thin passing. And (3) putting the rubber compound into a die, putting the die into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 160-180 ℃, and the temperature and pressure are maintained for 15min, and opening the die and taking out after the vulcanization is completed.
Example 6
(1) 12.47 parts by mass of ethylene propylene diene monomer, 0.13 part by mass of stearic acid, 0.62 part by mass of zinc oxide, 3.74 parts by mass of TUDALEN 13 and 0.13 part by mass of 2-mercaptobenzimidazole are sequentially added into an internal mixer to be banburying for 3min at 100 ℃, 25.00 parts by mass of boron nitride and 45.00 parts by mass of aluminum oxide are sequentially added to be continuously mixed for 1min, and rubber is discharged to obtain the ethylene propylene diene monomer.
(2) 12.47 parts by mass of polyethylene is added into an internal mixer, mixed for 3 minutes at 100 ℃, 87.09 parts by mass of ethylene propylene diene monomer masterbatch is added for continuous mixing for 3 minutes, and then the masterbatch is discharged.
(3) And (3) placing the discharged sizing material in a 90 ℃ open mill, sequentially adding 0.19 part by mass of amphiphobic butyl peroxide diisopropylbenzene and 0.25 part by mass of triallyl isocyanurate, and carrying out triangular wrapping for 10 times after the auxiliary agent is completely mixed into the sizing material, and carrying out sheet discharging after 4 times of thin passing. And (3) putting the rubber compound into a die, putting the die into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 160-180 ℃, and the temperature and pressure are maintained for 15min, and opening the die and taking out after the vulcanization is completed.
Performance test:
the materials prepared in examples 1-6 were tested for heat conductivity, mechanical properties, aging resistance, etc., and the results were as follows:
table 1 test results
As can be seen from Table 1, the insulating materials prepared in examples 1 to 6 have high heat conductivity, and the mechanical properties, the insulating properties and the thermal aging resistance meet the requirements, so that the insulating material is suitable for being used on the charging pile cable of the new energy automobile.
The PE/EPDM high-heat-conductivity insulating material for the EV charging cable and the preparation method thereof provided by the embodiment of the application are described in detail. The above description of embodiments is only for aiding in understanding the method of the present application and its core ideas; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As referred to throughout the specification and claims, the terms "comprising," including, "and" includes "are intended to be interpreted as" including/comprising, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a preset error range, substantially achieving the technical effect. The description hereinafter sets forth the preferred embodiment for carrying out the present application, but is not intended to limit the scope of the present application in general, for the purpose of illustrating the general principles of the present application. The scope of the present application is defined by the appended claims.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
While the foregoing description illustrates and describes the preferred embodiments of the present application, it is to be understood that this application is not limited to the forms disclosed herein, but is not to be construed as an admission that the application is not entitled to antedate such embodiments by virtue of prior teachings or knowledge of one of ordinary skill in the relevant art and with various other combinations, modifications and environments that are within the scope of the inventive concepts described herein. And that modifications and variations which do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.
Claims (10)
1. A PE/EPDM high thermal conductivity insulating material for EV charging cables, characterized in that: the PE/EPDM high-heat-conductivity insulating material comprises the following components in parts by weight:
2. the PE/EPDM high thermal conductivity insulating material according to claim 1, wherein the ethylene propylene diene monomer is 60-70wt% ethylene, the Mooney viscosity value ML 1+4,100 ℃ is 40-50, and the content of the third monomer ENB is 3-5wt%.
3. The PE/EPDM high thermal conductivity insulation material of claim 1, wherein the polyethylene has a melt index of 2.0 to 2.5g/10min.
4. The PE/EPDM high thermal conductivity insulation material of claim 1, wherein the plasticizer is a paraffin-based rubber plasticizer, has a viscosity (40 ℃) of greater than 400 mPa-s, and a flash point of greater than 240 ℃.
5. The PE/EPDM high thermal conductivity insulating material of claim 1, wherein the anti-aging agent is one or more of 2-mercaptobenzimidazole, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N-cyclohexyl-N' -phenyl-p-phenylenediamine.
6. The PE/EPDM high thermal conductivity insulating material of claim 1, wherein the thermally conductive filler is one or more of alumina, magnesia, zinc oxide, boron nitride, aluminum nitride.
7. The PE/EPDM high thermal conductivity insulating material of claim 1, wherein the vulcanizing agent is one or more of dicumyl peroxide, amphiphobic butyl dicumyl peroxide, benzoyl peroxide, t-butyl perbenzoate.
8. The PE/EPDM high thermal conductivity insulating material of claim 1, wherein the co-vulcanizing agent is one or more of triallyl isocyanurate, triallyl cyanurate, N '-m-phenylene bismaleimide, N' -m-phenylene bismaleimide.
9. A method for preparing a PE/EPDM high thermal conductivity insulating material as claimed in any one of claims 1 to 8, characterized in that it comprises in particular the following steps:
s1) respectively weighing all materials according to a designed proportion, sequentially adding ethylene propylene diene monomer rubber, stearic acid, zinc oxide, a plasticizer and an anti-aging agent into an internal mixer for mixing, wherein the mixing temperature is 90-110 ℃, the mixing time is 3-5 min, then adding a heat conducting filler for continuous mixing for 1-2 min, and discharging rubber to obtain ethylene propylene diene monomer rubber;
s2) adding the polyethylene into an internal mixer for secondary mixing, wherein the mixing temperature is 120-140 ℃, the mixing time is 2-3 min, and then adding the ethylene-propylene-diene monomer prepared in the S1), continuing mixing for 3-5 min, and discharging the rubber;
s3) placing the rubber discharge in an open mill preheated to 90 ℃, sequentially adding an auxiliary vulcanizing agent and a vulcanizing agent, carrying out open mill for 1-2 min, and carrying out sheet discharging after the auxiliary agent is completely mixed into the rubber material, packaging for 10 times by a triangular bag and carrying out sheet discharging after 4 times of thin pass;
s4) putting the rubber compound into a mould, putting the mould into a flat vulcanizing machine for vulcanization, wherein the pressure is 15MPa, the temperature is 160-180 ℃, and the heat and pressure are maintained for 15min, so that the heat-conducting and insulating composite material can be obtained after vulcanization.
10. The method according to claim 9, wherein the resulting thermally conductive and insulating composite material has a thermal conductivity of 1.03 to 1.29W/(mK), a tensile strength of 8.47 to 10.92MPa, and a volume resistance of 8.73X10 14 -9.24×10 14 Ω·cm。
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| CN116836485A (en) * | 2023-07-07 | 2023-10-03 | 江西铜业技术研究院有限公司 | High-heat-conductivity EV cable material containing core-shell spherical heat-conducting filler and preparation method thereof |
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| CN114516990A (en) * | 2022-03-16 | 2022-05-20 | 重庆泰山电缆有限公司 | Ethylene propylene diene monomer insulating material with high mechanical property and preparation method thereof |
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| CN114516990A (en) * | 2022-03-16 | 2022-05-20 | 重庆泰山电缆有限公司 | Ethylene propylene diene monomer insulating material with high mechanical property and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116836485A (en) * | 2023-07-07 | 2023-10-03 | 江西铜业技术研究院有限公司 | High-heat-conductivity EV cable material containing core-shell spherical heat-conducting filler and preparation method thereof |
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