CN111471273A - Breakdown-resistant film material for capacitor and preparation method thereof - Google Patents
Breakdown-resistant film material for capacitor and preparation method thereof Download PDFInfo
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- CN111471273A CN111471273A CN202010234718.2A CN202010234718A CN111471273A CN 111471273 A CN111471273 A CN 111471273A CN 202010234718 A CN202010234718 A CN 202010234718A CN 111471273 A CN111471273 A CN 111471273A
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- 239000000463 material Substances 0.000 title claims abstract description 42
- 230000015556 catabolic process Effects 0.000 title claims abstract description 40
- 239000003990 capacitor Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title description 13
- 229910052903 pyrophyllite Inorganic materials 0.000 claims abstract description 38
- 239000003822 epoxy resin Substances 0.000 claims abstract description 32
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 229920002472 Starch Polymers 0.000 claims abstract description 22
- 235000019698 starch Nutrition 0.000 claims abstract description 22
- 239000008107 starch Substances 0.000 claims abstract description 22
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 10
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 10
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 10
- 239000012188 paraffin wax Substances 0.000 claims abstract description 10
- 239000010452 phosphate Substances 0.000 claims abstract description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 10
- 229920005906 polyester polyol Polymers 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims description 35
- 230000005415 magnetization Effects 0.000 claims description 23
- 238000001354 calcination Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 claims description 12
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 230000004913 activation Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 6
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- 238000007710 freezing Methods 0.000 claims description 5
- 230000008014 freezing Effects 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims 1
- 230000003213 activating effect Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 239000003989 dielectric material Substances 0.000 description 4
- 238000002715 modification method Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- IEPRKVQEAMIZSS-AATRIKPKSA-N diethyl fumarate Chemical compound CCOC(=O)\C=C\C(=O)OCC IEPRKVQEAMIZSS-AATRIKPKSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- IAQRGUVFOMOMEM-ONEGZZNKSA-N trans-but-2-ene Chemical compound C\C=C\C IAQRGUVFOMOMEM-ONEGZZNKSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/14—Organic dielectrics
- H01G4/18—Organic dielectrics of synthetic material, e.g. derivatives of cellulose
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/04—Starch derivatives
- C08J2403/06—Esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2201/011—Nanostructured additives
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- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a breakdown-resistant film material for a capacitor, which comprises the following raw materials in parts by weight: 50-60 parts of pyrophyllite modified epoxy resin, 10-20 parts of surface modified gamma-nano aluminum oxide, 5-15 parts of acetylated starch, 1-3 parts of double starch phosphate, 2-5 parts of polyester polyol, 1-3 parts of linear low-density polyethylene resin and 2-5 parts of paraffin. After the epoxy resin is modified by the pyrophyllite, the high temperature resistance of the epoxy resin can be improved, and the pyrophyllite is calcined firstly, so that the purpose of preliminarily activating the pyrophyllite is achieved.
Description
Technical Field
The invention relates to the technical field of capacitors, in particular to a breakdown-resistant film material for a capacitor and a preparation method thereof.
Background
The capacitor, generally referred to simply as its capacity to hold a charge, is denoted by the letter C. A capacitor, as the name implies, is an electrically charged container, a device that contains an electrical charge. The capacitor is one of electronic elements widely used in electronic equipment, and is widely applied to aspects of blocking AC, coupling, bypassing, filtering, tuning loop, energy conversion, control and the like in a circuit. Two electrodes and a dielectric material therebetween. The dielectric material is a dielectric medium, when placed in an electric field between two parallel plates with equal amounts of opposite charges, polarization charges are generated on the surface of the dielectric medium due to polarization, and accordingly charges bound to the plates are increased correspondingly, and the potential difference between the plates is maintained constant. This is why capacitors have a capacitive character. The quantity of electricity Q stored in the capacitor is equal to the product of the capacitance C and the potential difference between the electrodes. Capacitance is proportional to the area of the plates and the dielectric constant of the dielectric material and inversely proportional to the thickness of the dielectric material (i.e., the distance between the plates).
The prior art through-film materials for capacitors do not have a breakdown resistance function, and at the same time, the breakdown resistance at high temperatures is significantly reduced, so that further improvement is required.
The existing chinese patent publication No. CN109036843A discloses a fire-proof and breakdown-resistant film capacitor, in which a composite film made of macromolecular copolymer modified polypropylene masterbatch is used as a dielectric of the film capacitor. The preparation method of the macromolecular copolymer modified polypropylene master batch comprises the following steps: respectively weighing 150 parts of trans-2-butene, 30-50 parts of acrylonitrile, 160 parts of diethyl fumarate, 1250 parts of deionized water, 10-12 parts of emulsifier, 5-7 parts of nano bentonite dispersion and 0.03-0.08 part of activator according to parts by weight, adding the materials into a reaction kettle, stirring at the rotating speed of 1500r/min for 2-3 hours, continuously introducing nitrogen gas for 20 minutes, heating to 35 ℃, keeping the temperature for 10 minutes, then adding 1.2-1.5 parts of initiator, uniformly stirring, reacting in a water bath at 35 ℃ for 10-12 hours, discharging, purifying reaction products, and drying to constant weight to obtain the macromolecular copolymer.
Disclosure of Invention
The invention aims to provide a breakdown-resistant film material for a capacitor and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention also provides a breakdown-resistant film material for the capacitor, which comprises the following raw materials in parts by weight:
50-60 parts of pyrophyllite modified epoxy resin, 10-20 parts of surface modified gamma-nano aluminum oxide, 5-15 parts of acetylated starch, 1-3 parts of double starch phosphate, 2-5 parts of polyester polyol, 1-3 parts of linear low-density polyethylene resin and 2-5 parts of paraffin.
Preferably, the breakdown-resistant film material for the capacitor comprises the following raw materials in percentage by weight:
53-57 parts of pyrophyllite modified epoxy resin, 8-16 parts of surface modified gamma-nano aluminum oxide, 7-12 parts of acetylated starch, 1.5-2 parts of double starch phosphate, 3-4 parts of polyester polyol, 2-2.5 parts of linear low density polyethylene resin and 3-4 parts of paraffin.
Preferably, the breakdown-resistant film material for the capacitor comprises the following raw materials in percentage by weight:
50-60 parts of pyrophyllite modified epoxy resin, 10-20 parts of surface modified gamma-nano aluminum oxide, 5-15 parts of acetylated starch, 1-3 parts of double starch phosphate, 2-5 parts of polyester polyol, 1-3 parts of linear low-density polyethylene resin and 2-5 parts of paraffin.
Preferably, the modification method of the pyrophyllite modified epoxy resin comprises the following steps: calcining pyrophyllite in a crucible at the calcining temperature of 500-1000 ℃, calcining for 20-30min, finishing calcining, adding an improved liquid according to the weight ratio of 1:3, then sending into a stirrer for stirring at the stirring speed of 100-500r/min for 20-30min, finishing stirring, then carrying out magnetization treatment, finishing magnetization, then freezing at the temperature of-5 ℃ for 10-20min, finishing cooling, sending into room temperature for 1-2h, then standby, adding epoxy resin into a magnetic stirrer, then adding an acetone solution, then adding standby pyrophyllite, then stirring at the speed of 300-500r/min for 20-30min, and finishing stirring to obtain the pyrophyllite modified epoxy resin.
Preferably, the preparation method of the improved liquid comprises the following steps: adding aluminum silicate into sodium bicarbonate solution, adding 4-dimethylaminopyridine, then adding cobalt chloride, and continuously stirring at the rotating speed of 50-100r/min for 20-30min to obtain the improved solution.
Preferably, the magnetic field intensity of the magnetization treatment is 600-100G, and the magnetization treatment lasts for 5-9 min.
Preferably, the magnetic field intensity of the magnetization treatment is 800G, and the magnetization treatment lasts for 7 min.
Preferably, the surface modification gamma-nano alumina is that the gamma-nano alumina is placed in a silane coupling agent for ultrasonic dispersion for 20-30min, the ultrasonic power is 200-300W, then the gamma-nano alumina is taken out and activated for 10-20min at the temperature of 80-100 ℃, and after the activation is finished, the gamma-nano alumina is washed by water.
The invention also provides a method for preparing the breakdown-resistant film material for the capacitor, which is characterized by comprising the following steps of:
step one, weighing the following raw materials in parts by weight:
and step two, sequentially adding the raw materials into a high-speed stirrer, increasing the rotating speed to 515-.
Compared with the prior art, the invention has the following beneficial effects:
(1) the epoxy resin can improve the high temperature resistance of the epoxy resin after being modified by pyrophyllite, the pyrophyllite is firstly calcined, the aim is to preliminarily activate the pyrophyllite and facilitate further treatment of an improved liquid, the improved liquid adopts aluminum silicate to be added into sodium bicarbonate solution, then 4-dimethylamino pyridine is added, and then cobalt chloride is added, so that the treatment effect of the pyrophyllite on the epoxy resin can be improved, the high temperature resistance effect of the epoxy resin is enhanced, meanwhile, the added surface modification gamma-nano aluminum oxide can be interpenetrated in the material, the contact effect among the raw materials is improved, the bonding strength among the raw materials can be enhanced by the added acetylated starch, the raw materials are mutually matched, and the breakdown strength and the high temperature resistance of the material can be enhanced.
(2) The breakdown strength of the material of the invention is 45KV/mm at 25 ℃, 41KV/mm at 110 ℃, 33KV/mm at 25 ℃ and 22KV/mm at 110 ℃ in comparative example 4, and the material of the invention has significant breakdown strength.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the breakdown-resistant film material for the capacitor comprises the following raw materials in parts by weight:
50 parts of pyrophyllite modified epoxy resin, 10 parts of surface modified gamma-nano alumina, 5 parts of acetylated starch, 1 part of double starch phosphate, 2 parts of polyester polyol, 1 part of linear low-density polyethylene resin and 2 parts of paraffin.
The modification method of the pyrophyllite modified epoxy resin comprises the following steps: calcining pyrophyllite in a crucible at 500 ℃ for 20min, finishing calcining, adding the improved liquid according to the weight ratio of 1:3, then sending the mixture into a stirrer to stir at the stirring speed of 100r/min for 20min, finishing stirring, then carrying out magnetization treatment, finishing magnetization, then freezing at-5 ℃ for 10min, cooling, sending the mixture to room temperature to keep for 1h, then keeping for later use, adding epoxy resin into a magnetic stirrer, then adding acetone solution, then adding standby pyrophyllite, then stirring at the rotating speed of 300r/min for 20min, and finishing stirring to obtain the pyrophyllite modified epoxy resin.
The preparation method of the improved solution of this example is: adding aluminum silicate into sodium bicarbonate solution, adding 4-dimethylaminopyridine, then adding cobalt chloride, and continuously stirring at the rotating speed of 500r/min for 20min to obtain the improved solution.
The magnetic field intensity of the magnetization treatment in this example was 600G, and the magnetization treatment was performed for 5 min.
The surface modification of the gamma-nano aluminum oxide is that the gamma-nano aluminum oxide is placed in a silane coupling agent for ultrasonic dispersion for 20min, the ultrasonic power is 200W, then the gamma-nano aluminum oxide is taken out and activated for 10min at the temperature of 80 ℃, and after the activation is finished, the gamma-nano aluminum oxide is washed by water.
The invention also provides a method for preparing the breakdown-resistant film material for the capacitor, which is characterized by comprising the following steps of:
step one, weighing the following raw materials in parts by weight:
and step two, sequentially adding the raw materials into a high-speed stirrer, increasing the rotating speed to 515r/min, stirring for 35min, then sending the raw materials into an extruder for extrusion at the extrusion temperature of 175 ℃, then sending the raw materials into a sheet casting machine for cooling to form a sheet, and cooling at the cooling temperature of 28 ℃ to obtain the breakdown-resistant film material for the capacitor.
Example 2:
the breakdown-resistant film material for the capacitor comprises the following raw materials in parts by weight:
60 parts of pyrophyllite modified epoxy resin, 20 parts of surface modified gamma-nano alumina, 15 parts of acetylated starch, 3 parts of double starch phosphate, 5 parts of polyester polyol, 3 parts of linear low-density polyethylene resin and 5 parts of paraffin.
The modification method of the pyrophyllite modified epoxy resin comprises the following steps: calcining pyrophyllite in a crucible at 1000 ℃ for 30min, finishing calcining, adding the improved liquid according to the weight ratio of 1:3, then sending the mixture into a stirrer to stir at the stirring speed of 500r/min for 30min, finishing stirring, then carrying out magnetization treatment, finishing magnetization, then freezing at-5 ℃ for 20min, finishing cooling, sending the mixture into a room temperature to keep for 2h, then keeping for later use, adding epoxy resin into a magnetic stirrer, then adding an acetone solution, then adding the spare pyrophyllite, then stirring at the speed of 500r/min for 30min, and finishing stirring to obtain the pyrophyllite modified epoxy resin.
The preparation method of the improved solution of this example is: adding aluminum silicate into sodium bicarbonate solution, adding 4-dimethylaminopyridine, then adding cobalt chloride, and continuously stirring at the rotating speed of 100r/min for 30min to obtain the improved solution.
The magnetic field intensity of the magnetization treatment in this example was 100G, and the magnetization treatment was 9 min.
The surface modification of the gamma-nano aluminum oxide is that the gamma-nano aluminum oxide is placed in a silane coupling agent for ultrasonic dispersion for 30min, the ultrasonic power is 300W, then the gamma-nano aluminum oxide is taken out and subjected to activation treatment for 20min at the temperature of 100 ℃, and after the activation is finished, the gamma-nano aluminum oxide is washed by water.
The invention also provides a method for preparing the breakdown-resistant film material for the capacitor, which is characterized by comprising the following steps of:
step one, weighing the following raw materials in parts by weight:
and step two, sequentially adding the raw materials into a high-speed stirrer, increasing the rotating speed to 525r/min, stirring for 45min, then sending the mixture into an extruder for extrusion at the extrusion temperature of 185 ℃, then sending the mixture into a sheet casting machine for cooling to form a sheet, and cooling at the cooling temperature of 32 ℃ to obtain the breakdown-resistant film material for the capacitor.
Example 3:
the breakdown-resistant film material for the capacitor comprises the following raw materials in parts by weight:
55 parts of pyrophyllite modified epoxy resin, 15 parts of surface modified gamma-nano alumina, 10 parts of acetylated starch, 2 parts of double starch phosphate, 3.5 parts of polyester polyol, 2 parts of linear low-density polyethylene resin and 3.5 parts of paraffin.
The modification method of the pyrophyllite modified epoxy resin comprises the following steps: calcining pyrophyllite in a crucible at 750 ℃ for 25min, finishing calcining, adding the improved liquid according to the weight ratio of 1:3, then sending the mixture into a stirrer to stir at the stirring speed of 300r/min for 25min, finishing stirring, then carrying out magnetization treatment, finishing magnetization, then freezing at-5 ℃ for 15min, finishing cooling, sending the mixture into a room temperature to keep for 1.5h, then keeping for later use, adding epoxy resin into a magnetic stirrer, then adding an acetone solution, then adding the spare pyrophyllite, then stirring at the rotating speed of 400r/min for 25min, and finishing stirring to obtain the pyrophyllite modified epoxy resin.
The preparation method of the improved solution of this example is: adding aluminum silicate into sodium bicarbonate solution, adding 4-dimethylaminopyridine, then adding cobalt chloride, and continuously stirring at the rotating speed of 75r/min for 25min to obtain the improved solution.
The magnetic field intensity of the magnetization treatment in this example was 800G, and the magnetization treatment was 7 min.
The surface modification of the gamma-nano aluminum oxide is that the gamma-nano aluminum oxide is placed in a silane coupling agent for ultrasonic dispersion for 25min, the ultrasonic power is 250W, then the gamma-nano aluminum oxide is taken out and activated for 15min at the temperature of 90 ℃, and after the activation is finished, the gamma-nano aluminum oxide is washed by water.
The invention also provides a method for preparing the breakdown-resistant film material for the capacitor, which is characterized by comprising the following steps of:
step one, weighing the following raw materials in parts by weight:
and step two, sequentially adding the raw materials into a high-speed stirrer, increasing the rotating speed to 520r/min, stirring for 40min, then sending the mixture into an extruder for extrusion at the extrusion temperature of 180 ℃, then sending the mixture into a sheet casting machine for cooling to form a sheet, and cooling at the cooling temperature of 30 ℃ to obtain the breakdown-resistant film material for the capacitor.
Comparative example 1:
the materials and preparation process were essentially the same as in example 3, except that no acetylated starch was added.
Comparative example 2:
the materials and preparation process are basically the same as those of example 3, except that no pyrophyllite modified epoxy resin is adopted.
Comparative example 3:
the materials and preparation process are basically the same as those of the example 3, except that the surface modification gamma-nano alumina is not added.
Comparative example 4:
the materials and preparation process are basically the same as those of example 3, except that conventional breakdown-resistant materials are used.
The puncture-resistant materials of example 3 and comparative examples 1 to 4 were subjected to performance tests, and the test results are shown in Table 1
TABLE 1
As can be seen from Table 1, the breakdown strength at 25 ℃ of example 3 of the present invention was 45KV/mm, the breakdown strength at 110 ℃ was 41KV/mm, the breakdown strength at 25 ℃ of comparative example 4 was 33KV/mm, and the breakdown strength at 110 ℃ was 22KV/mm, indicating that the material of the present invention has significant breakdown strength.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The breakdown-resistant film material for the capacitor is characterized by comprising the following raw materials in parts by weight:
50-60 parts of pyrophyllite modified epoxy resin, 10-20 parts of surface modified gamma-nano aluminum oxide, 5-15 parts of acetylated starch, 1-3 parts of double starch phosphate, 2-5 parts of polyester polyol, 1-3 parts of linear low-density polyethylene resin and 2-5 parts of paraffin.
2. The breakdown-resistant film material for the capacitor as claimed in claim 1, wherein the breakdown-resistant film material for the capacitor comprises the following raw materials in percentage by weight:
53-57 parts of pyrophyllite modified epoxy resin, 8-16 parts of surface modified gamma-nano aluminum oxide, 7-12 parts of acetylated starch, 1.5-2 parts of double starch phosphate, 3-4 parts of polyester polyol, 2-2.5 parts of linear low density polyethylene resin and 3-4 parts of paraffin.
3. The breakdown-resistant film material for the capacitor as claimed in claim 1, wherein the breakdown-resistant film material for the capacitor comprises the following raw materials in percentage by weight:
50-60 parts of pyrophyllite modified epoxy resin, 10-20 parts of surface modified gamma-nano aluminum oxide, 5-15 parts of acetylated starch, 1-3 parts of double starch phosphate, 2-5 parts of polyester polyol, 1-3 parts of linear low-density polyethylene resin and 2-5 parts of paraffin.
4. The breakdown-resistant film material for the capacitor as claimed in claim 1, wherein the modifying method of the pyrophyllite modified epoxy resin comprises the following steps: calcining pyrophyllite in a crucible at the calcining temperature of 500-1000 ℃, calcining for 20-30min, finishing calcining, adding an improved liquid according to the weight ratio of 1:3, then sending into a stirrer for stirring at the stirring speed of 100-500r/min for 20-30min, finishing stirring, then carrying out magnetization treatment, finishing magnetization, then freezing at the temperature of-5 ℃ for 10-20min, finishing cooling, sending into room temperature for 1-2h, then standby, adding epoxy resin into a magnetic stirrer, then adding an acetone solution, then adding standby pyrophyllite, then stirring at the speed of 300-500r/min for 20-30min, and finishing stirring to obtain the pyrophyllite modified epoxy resin.
5. The breakdown-resistant film material for capacitors as claimed in claim 4, wherein the modified solution is prepared by the following steps: adding aluminum silicate into sodium bicarbonate solution, adding 4-dimethylaminopyridine, then adding cobalt chloride, and continuously stirring at the rotating speed of 50-100r/min for 20-30min to obtain the improved solution.
6. The breakdown-resistant film material for capacitors as claimed in claim 4, wherein the magnetic field strength of the magnetization treatment is 600-100G, and the magnetization treatment lasts for 5-9 min.
7. The material of claim 6, wherein the magnetization of the film is 800G for 7 min.
8. The breakdown-resistant film material for the capacitor as claimed in claim 1, wherein the surface-modified γ -nano alumina is γ -nano alumina, which is placed in a silane coupling agent for ultrasonic dispersion for 20-30min at an ultrasonic power of 200-300W, and then taken out for activation treatment at a temperature of 80-100 ℃ for 10-20min, and after the activation, water washing is carried out.
9. A method of preparing a breakdown-resistant film material for capacitors as claimed in any one of claims 1 to 8, comprising the steps of:
step one, weighing the following raw materials in parts by weight:
and step two, sequentially adding the raw materials into a high-speed stirrer, increasing the rotating speed to 515-.
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| CN103951886A (en) * | 2014-04-12 | 2014-07-30 | 安徽江威精密制造有限公司 | Heat-resistant breakdown-proof capacitor metallized thin film, and preparation method thereof |
| CN109517295A (en) * | 2018-10-25 | 2019-03-26 | 浙江方圆检测集团股份有限公司 | A kind of raw particles and preparation method thereof of pyrophillite fine powder and the compound electric wire and cable jacket material of polyvinyl chloride |
| CN110776305A (en) * | 2019-12-10 | 2020-02-11 | 欧阳方友 | Electric porcelain insulator and preparation method thereof |
| CN110808166A (en) * | 2019-11-28 | 2020-02-18 | 铜陵市佳龙飞电容器有限公司 | High-conductivity breakdown-resistant capacitor and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103951886A (en) * | 2014-04-12 | 2014-07-30 | 安徽江威精密制造有限公司 | Heat-resistant breakdown-proof capacitor metallized thin film, and preparation method thereof |
| CN109517295A (en) * | 2018-10-25 | 2019-03-26 | 浙江方圆检测集团股份有限公司 | A kind of raw particles and preparation method thereof of pyrophillite fine powder and the compound electric wire and cable jacket material of polyvinyl chloride |
| CN110808166A (en) * | 2019-11-28 | 2020-02-18 | 铜陵市佳龙飞电容器有限公司 | High-conductivity breakdown-resistant capacitor and preparation method thereof |
| CN110776305A (en) * | 2019-12-10 | 2020-02-11 | 欧阳方友 | Electric porcelain insulator and preparation method thereof |
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