CN116922915A - High-temperature-resistant polypropylene film for film capacitor and preparation method thereof - Google Patents
High-temperature-resistant polypropylene film for film capacitor and preparation method thereof Download PDFInfo
- Publication number
- CN116922915A CN116922915A CN202310925976.9A CN202310925976A CN116922915A CN 116922915 A CN116922915 A CN 116922915A CN 202310925976 A CN202310925976 A CN 202310925976A CN 116922915 A CN116922915 A CN 116922915A
- Authority
- CN
- China
- Prior art keywords
- film
- surface layer
- nano particles
- inorganic nano
- resistant polypropylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 68
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 68
- -1 polypropylene Polymers 0.000 title claims abstract description 65
- 239000003990 capacitor Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002344 surface layer Substances 0.000 claims abstract description 48
- 239000002105 nanoparticle Substances 0.000 claims abstract description 44
- 239000010410 layer Substances 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 229920001577 copolymer Polymers 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims description 21
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 20
- 239000006185 dispersion Substances 0.000 claims description 16
- 238000005266 casting Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- 229960003638 dopamine Drugs 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000004793 Polystyrene Substances 0.000 claims description 5
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 5
- 230000009477 glass transition Effects 0.000 claims description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- 229920002223 polystyrene Polymers 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 claims description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 2
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- 229910002112 ferroelectric ceramic material Inorganic materials 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 57
- 230000000052 comparative effect Effects 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 5
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 229920001690 polydopamine Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 150000001925 cycloalkenes Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000012462 polypropylene substrate Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/204—Di-electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/10—Peculiar tacticity
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a high-temperature-resistant polypropylene film for a film capacitor and a preparation method thereof, wherein the high-temperature-resistant polypropylene film for the film capacitor comprises an upper surface layer, a middle layer and a lower surface layer; the middle layer consists of 65-80% of polypropylene resin and 20-35% of cycloolefin copolymer, and the upper surface layer and the lower surface layer consist of 70-85% of polypropylene resin, 1-5% of compatilizer, 15-25% of modified inorganic nano particles and 0.3-0.5% of antioxidant; the high-temperature-resistant polypropylene film for the film capacitor prepared by the method not only has good heat resistance, mechanical property and processing property, but also has higher dielectric property and lower dielectric loss, and the preparation method is simple and easy to industrialize.
Description
Technical Field
The invention belongs to the technical field of polymer films, and particularly relates to a high-temperature-resistant polypropylene film for a film capacitor and a preparation method thereof.
Background
Capacitors can be divided into, depending on the medium: electrolyte capacitors, paper capacitors, film capacitors, ceramic capacitors, mica capacitors, air capacitors, and the like. With the recent development of miniaturization and large capacity of electric and electronic devices, thin film capacitors have been widely used in various fields such as electric automobiles, smart grids, aerospace and energy.
The polypropylene (PP) film is a main dielectric material of the film capacitor due to the advantages of high breakdown field strength, small dielectric loss, excellent self-healing property, ultrathin property, low cost and the like, but the upper limit of the use temperature of the PP film is about 110 ℃, and the heat resistance requirement of the film capacitor on the dielectric material cannot be met. Particularly, when the operating temperature exceeds 85 ℃, the existing polypropylene film capacitor has the phenomena of sharply reduced breakdown strength and sharply increased leakage loss, so that the capacitor bulges or even explodes, and finally the safety of the whole equipment system is endangered.
Therefore, the existing polypropylene film has poor high temperature resistance, is difficult to meet the actual use requirement of a film capacitor, and is very necessary to design the high temperature resistant polypropylene film for the film capacitor.
Disclosure of Invention
In order to solve the problems, the invention provides the high-temperature-resistant polypropylene film for the film capacitor and the preparation method thereof, and the high-temperature-resistant polypropylene film for the film capacitor not only has good heat resistance, mechanical property and processing property, but also has higher dielectric property and lower dielectric loss, and the preparation method is simple and easy to industrialize.
The invention adopts the following technical scheme:
the high-temperature-resistant polypropylene film for the film capacitor comprises an upper surface layer, a middle layer and a lower surface layer; the middle layer consists of 65-80% of polypropylene resin and 20-35% of cycloolefin copolymer by mass percent, and the upper surface layer and the lower surface layer consist of 70-85% of polypropylene resin, 1-5% of compatilizer, 15-25% of modified inorganic nano particles and 0.3-0.5% of antioxidant by mass percent.
Preferably, the specific preparation method of the modified inorganic nano-particles comprises the following steps: firstly, 1g: adding inorganic nano particles into deionized water according to a feed liquid ratio of 500-1000ml, and performing ultrasonic dispersion for 20-40min to obtain a dispersion liquid; adding dopamine with the same mass as the inorganic nano particles into the dispersion liquid, regulating the pH value to 8-8.5, stirring and dispersing for 12-24 hours, and centrifugally collecting solids to obtain the modified inorganic nano particles.
Preferably, the inorganic nano particles are one or more of metal oxide, ferroelectric ceramic material and carbon material.
Preferably, the compatilizer is one or more of maleic anhydride grafted polystyrene and polypropylene grafted styrene.
Preferably, the antioxidant is one or more of antioxidant 1010, antioxidant 168 and antioxidant 1098.
Preferably, the polypropylene resin has an isotacticity of 95% or more and a melt flow rate of 2.5-5g/10min.
Preferably, the cycloolefin copolymer has a glass transition temperature Tg of 120 to 170℃and a melt flow rate of 0.03 to 0.4g/10min.
Preferably, the thickness of the intermediate layer is 3-5 μm; the thickness of the upper surface layer and the lower surface layer is 3-5 mu m.
The preparation method of the high-temperature-resistant polypropylene film for the film capacitor specifically comprises the following steps:
s1, according to 1g: adding inorganic nano particles into deionized water according to a feed liquid ratio of 500-1000ml, and performing ultrasonic dispersion for 20-40min to obtain a dispersion liquid;
s2, adding dopamine with the same mass as the inorganic nano particles into the dispersion liquid, regulating the pH value to 8-8.5, stirring and dispersing for 12-24 hours, and centrifugally collecting solids to obtain modified inorganic nano particles;
s3, respectively weighing the raw materials of the upper surface layer, the middle layer and the lower surface layer according to the mass percentage in the formula, stirring and uniformly mixing, and respectively putting into a main machine and an auxiliary machine of a three-layer co-extrusion casting machine for melt extrusion to obtain a composite casting sheet;
and S4, biaxially stretching the composite casting sheet to obtain the high-temperature-resistant polypropylene film for the film capacitor.
After the technical scheme is adopted, compared with the background technology, the invention has the following advantages:
1. the added cycloolefin copolymer (COC) is an amorphous transparent high molecular material synthesized by homopolymerizing cycloolefin monomers or copolymerizing with alpha-olefin, and has the characteristics of small dielectric loss and low dielectric constant, and the molecular chain only contains two kinds of carbon-hydrogen atoms. The addition of a proper amount of cycloolefin copolymer COC can effectively improve the breakdown field strength of the polypropylene film at high temperature and reduce the conductivity loss. Meanwhile, the cycloolefin copolymer COC and the polypropylene resin PP have better compatibility, the molecular chain of the cycloolefin copolymer COC contains benzene rings, the introduced amount of the benzene rings can be controlled by adjusting the added amount of the cycloolefin copolymer COC, the intermolecular acting force is adjusted, the compatibility, the crystallization characteristic and the molecular chain rigidity of a blending system are further adjusted, the microstructure of the film is adjusted, the movement of the molecular chain in a high-temperature environment is inhibited, the aim of improving the insulating property of the polypropylene film at a high temperature is fulfilled, the effect is good, the operation is simple, and the cost is low.
2. According to the invention, the modified inorganic nano particles are added to the upper surface layer and the lower surface layer, dopamine and the inorganic nano particles are dispersed in an aqueous solution, the dopamine is coated on the surfaces of the inorganic nano particles through self-polymerization of the dopamine under the weak alkaline condition, so that the polydopamine modified inorganic nano particles are formed, and the polydopamine is used for modifying and coating the inorganic nano particles, so that the interface compatibility of the inorganic nano particles and the polymer matrix can be improved through the hydrogen bonding action of the polydopamine and the polymer matrix, and the inorganic nano particles are uniformly dispersed in the film, so that the breakdown resistance of the film is improved, the dielectric constant of the polypropylene film can be effectively improved, and the storage density of the film is ensured.
3. According to the invention, maleic anhydride grafted polystyrene and polypropylene grafted styrene are used as compatilizer, so that the uniform dispersion of inorganic nano particles in a polypropylene substrate can be promoted, the toughness of the film is improved, a proper amount of benzene rings can be introduced, the charge storage capacity of the film is improved, and the dielectric property of the film is improved.
4. The invention selects polypropylene with isotacticity more than or equal to 95% and melt flow rate of 2.5-5g/10min, which can keep high dielectric property and has good processing property.
Drawings
Fig. 1 is a schematic structural view of a high temperature resistant polypropylene film for a film capacitor according to the present invention.
The reference numerals in the drawings are as follows:
1. an upper surface layer; 2. an intermediate layer; 3. a lower surface layer.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that terms used in the present invention (including technical terms and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs and are not to be construed as limiting the present invention; it will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
The high-temperature-resistant polypropylene film for the film capacitor comprises an upper surface layer 1, a middle layer 2 and a lower surface layer 3; the middle layer 2 consists of 75% of polypropylene resin and 25% of cycloolefin copolymer by mass percentage, and the upper surface layer 1 and the lower surface layer 3 consist of 75% of polypropylene resin, 4.5% of compatilizer, 20% of modified inorganic nano particles and 0.5% of antioxidant.
The preparation method of the high-temperature-resistant polypropylene film for the film capacitor specifically comprises the following steps:
s1, according to 1g: adding inorganic nano particles into deionized water according to a feed liquid ratio of 1000ml, and performing ultrasonic dispersion for 20min to obtain a dispersion liquid;
s2, adding dopamine with the same mass as the inorganic nano particles into the dispersion liquid, regulating the pH value to 8, stirring and dispersing for 12 hours, and centrifugally collecting solids to obtain modified inorganic nano particles;
s3, respectively weighing the raw materials of the upper surface layer 1, the middle layer 2 and the lower surface layer 3 according to the mass percentage in the formula, stirring and uniformly mixing, and respectively putting into a main machine and an auxiliary machine of a three-layer co-extrusion casting machine for melt extrusion to obtain a composite casting sheet;
and S4, biaxially stretching the composite casting sheet to obtain the high-temperature-resistant polypropylene film for the film capacitor.
Wherein the isotacticity of the polypropylene resin is 97%, and the melt flow rate is 3.5g/10min; the glass transition temperature Tg of the cycloolefin copolymer was 150℃and the melt flow rate was 0.2g/10min; the compatilizer is maleic anhydride grafted polystyrene, the inorganic nano particles are barium titanate, the antioxidant is antioxidant 1010, and the thicknesses of the upper surface layer 1, the middle layer 2 and the lower surface layer 3 are all 5 mu m.
Example 2
The high-temperature-resistant polypropylene film for the film capacitor comprises an upper surface layer 1, a middle layer 2 and a lower surface layer 3; the middle layer 2 consists of 75% of polypropylene resin and 25% of cycloolefin copolymer by mass percentage, and the upper surface layer 1 and the lower surface layer 3 consist of 75% of polypropylene resin, 4.5% of compatilizer, 20% of modified inorganic nano particles and 0.5% of antioxidant.
The preparation method of the high-temperature-resistant polypropylene film for the film capacitor specifically comprises the following steps:
s1, according to 1g: adding inorganic nano particles into deionized water according to a feed liquid ratio of 1000ml, and performing ultrasonic dispersion for 20min to obtain a dispersion liquid;
s2, adding dopamine with the same mass as the inorganic nano particles into the dispersion liquid, regulating the pH value to 8, stirring and dispersing for 12 hours, and centrifugally collecting solids to obtain modified inorganic nano particles;
s3, respectively weighing the raw materials of the upper surface layer 1, the middle layer 2 and the lower surface layer 3 according to the mass percentage in the formula, stirring and uniformly mixing, and respectively putting into a main machine and an auxiliary machine of a three-layer co-extrusion casting machine for melt extrusion to obtain a composite casting sheet;
and S4, biaxially stretching the composite casting sheet to obtain the high-temperature-resistant polypropylene film for the film capacitor.
Wherein the isotacticity of the polypropylene resin is 97%, and the melt flow rate is 3.5g/10min; the glass transition temperature Tg of the cycloolefin copolymer was 150℃and the melt flow rate was 0.2g/10min; the compatilizer is polypropylene grafted styrene, the inorganic nano particles are titanium oxide, the antioxidant is antioxidant 1010, and the thicknesses of the upper surface layer 1, the middle layer 2 and the lower surface layer 3 are all 5 mu m.
Example 3
The high-temperature-resistant polypropylene film for the film capacitor comprises an upper surface layer 1, a middle layer 2 and a lower surface layer 3; the middle layer 2 consists of 75% of polypropylene resin and 25% of cycloolefin copolymer, and the upper surface layer 1 and the lower surface layer 3 consist of 80% of polypropylene resin, 4.5% of compatilizer, 15% of modified inorganic nano particles and 0.5% of antioxidant.
The preparation method of the high-temperature-resistant polypropylene film for the film capacitor specifically comprises the following steps:
s1, according to 1g: adding inorganic nano particles into deionized water according to a feed liquid ratio of 1000ml, and performing ultrasonic dispersion for 20min to obtain a dispersion liquid;
s2, adding dopamine with the same mass as the inorganic nano particles into the dispersion liquid, regulating the pH value to 8, stirring and dispersing for 12 hours, and centrifugally collecting solids to obtain modified inorganic nano particles;
s3, respectively weighing the raw materials of the upper surface layer 1, the middle layer 2 and the lower surface layer 3 according to the mass percentage in the formula, stirring and uniformly mixing, and respectively putting into a main machine and an auxiliary machine of a three-layer co-extrusion casting machine for melt extrusion to obtain a composite casting sheet;
and S4, biaxially stretching the composite casting sheet to obtain the high-temperature-resistant polypropylene film for the film capacitor.
Wherein the isotacticity of the polypropylene resin is 97%, and the melt flow rate is 3.5g/10min; the glass transition temperature Tg of the cycloolefin copolymer was 150℃and the melt flow rate was 0.2g/10min; the compatilizer is maleic anhydride grafted polystyrene, the inorganic nano particles are graphene, the antioxidant is antioxidant 1010, and the thicknesses of the upper surface layer 1, the middle layer 2 and the lower surface layer 3 are all 5 mu m.
Comparative example 1
This comparative example 1 differs from example 1 in that: the preparation process adopts common inorganic nano particles, and does not comprise steps S1 and S2.
Comparative example 2
This comparative example 2 differs from example 1 in that: the middle layer is 100% polypropylene resin.
The polypropylene films prepared in examples 1-3 and comparative examples 1-2 were subjected to performance test, and the results are shown in Table 1:
table 1 performance test tables for examples 1-3 and comparative examples 1-2
Wherein, the tensile strength and elongation at break of the composite film are tested according to GB/T13541 under the test conditions of 23 ℃,50% RH and 100mm/min; the heat shrinkage is measured according to GB/T13541, and the test condition is that the test is carried out in a baking oven at 120 ℃ for 10min; dielectric loss factor and breakdown voltage were tested according to GB 1409 at 23℃and 50Hz.
As can be seen from the above data, the non-uniform dispersion of the unmodified inorganic nanoparticles in polypropylene in comparative example 1 makes the dielectric properties inferior to those of example 1, and the heat resistance and dielectric properties of the film as a whole are inferior in comparative example 2 because the intermediate layer does not contain the cycloolefin copolymer.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (9)
1. A high temperature resistant polypropylene film for a film capacitor is characterized in that: the high-temperature-resistant polypropylene film for the film capacitor comprises an upper surface layer (1), a middle layer (2) and a lower surface layer (3); the middle layer (2) consists of 65-80% of polypropylene resin and 20-35% of cycloolefin copolymer by mass percent, and the upper surface layer (1) and the lower surface layer (3) consist of 70-85% of polypropylene resin, 1-5% of compatilizer, 15-25% of modified inorganic nano particles and 0.3-0.5% of antioxidant by mass percent.
2. The high temperature resistant polypropylene film for film capacitor as claimed in claim 1, wherein the specific preparation method of the modified inorganic nano particles is as follows: firstly, 1g: adding inorganic nano particles into deionized water according to a feed liquid ratio of 500-1000ml, and performing ultrasonic dispersion for 20-40min to obtain a dispersion liquid; adding dopamine with the same mass as the inorganic nano particles into the dispersion liquid, regulating the pH value to 8-8.5, stirring and dispersing for 12-24 hours, and centrifugally collecting solids to obtain the modified inorganic nano particles.
3. The high temperature resistant polypropylene film for film capacitors as claimed in claim 2, wherein: the inorganic nano particles are one or more of metal oxide, ferroelectric ceramic material and carbon material.
4. The high temperature resistant polypropylene film for film capacitors as claimed in claim 1, wherein: the compatilizer is one or more of maleic anhydride grafted polystyrene and polypropylene grafted styrene.
5. The high temperature resistant polypropylene film for film capacitors as claimed in claim 1, wherein: the antioxidant is one or more of antioxidant 1010, antioxidant 168 and antioxidant 1098.
6. The high temperature resistant polypropylene film for film capacitors as claimed in claim 1, wherein: the isotacticity of the polypropylene resin is more than or equal to 95 percent, and the melt flow rate is 2.5-5g/10min.
7. The high temperature resistant polypropylene film for film capacitors as claimed in claim 1, wherein: the glass transition temperature Tg of the cycloolefin copolymer is 120-170 ℃ and the melt flow rate is 0.03-0.4g/10min.
8. The high temperature resistant polypropylene film for film capacitors as claimed in claim 1, wherein: the thickness of the intermediate layer (2) is 3-5 mu m; the thickness of the upper surface layer (1) and the lower surface layer (3) is 3-5 mu m.
9. A method for preparing a high temperature resistant polypropylene film for a film capacitor as defined in any one of claims 1 to 8, comprising the steps of:
s1, according to 1g: adding inorganic nano particles into deionized water according to a feed liquid ratio of 500-1000ml, and performing ultrasonic dispersion for 20-40min to obtain a dispersion liquid;
s2, adding dopamine with the same mass as the inorganic nano particles into the dispersion liquid, regulating the pH value to 8-8.5, stirring and dispersing for 12-24 hours, and centrifugally collecting solids to obtain modified inorganic nano particles;
s3, respectively weighing the raw materials of the upper surface layer (1), the middle layer (2) and the lower surface layer (3) according to the mass percentage in the formula, stirring and mixing uniformly, and respectively putting into a main machine and an auxiliary machine of a three-layer co-extrusion casting machine for melt extrusion to obtain a composite casting sheet;
and S4, biaxially stretching the composite casting sheet to obtain the high-temperature-resistant polypropylene film for the film capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310925976.9A CN116922915A (en) | 2023-07-26 | 2023-07-26 | High-temperature-resistant polypropylene film for film capacitor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310925976.9A CN116922915A (en) | 2023-07-26 | 2023-07-26 | High-temperature-resistant polypropylene film for film capacitor and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116922915A true CN116922915A (en) | 2023-10-24 |
Family
ID=88387579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310925976.9A Pending CN116922915A (en) | 2023-07-26 | 2023-07-26 | High-temperature-resistant polypropylene film for film capacitor and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116922915A (en) |
-
2023
- 2023-07-26 CN CN202310925976.9A patent/CN116922915A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Enhanced energy storage performance of ferroelectric polymer nanocomposites at relatively low electric fields induced by surface modified BaTiO3 nanofibers | |
| CN115447248B (en) | Composite polymer film, method for producing same, metallized composite polymer film and use | |
| US20230151165A1 (en) | High-concentration particle-containing film and method for producing same | |
| WO2022193572A1 (en) | Boron nitride heat dissipation film, preparation method therefor, and application thereof | |
| JP3221021U (en) | Dielectric substrate comprising non-sintered polytetrafluoroethylene and method of manufacturing the same | |
| CN104277386A (en) | Polyvinylidene fluoride film for film capacitor | |
| CN110341205B (en) | Multilayer polymer nanocomposite and preparation method thereof | |
| CN111234382A (en) | Polypropylene composite dielectric material and preparation method thereof | |
| Gong et al. | All-organic sandwich-structured BOPP/PVDF/BOPP dielectric films with significantly improved energy density and charge–discharge efficiency | |
| CN102775626B (en) | Preparation method of high-energy storage density solid dielectric composite material | |
| Wang et al. | Enhanced dielectric thermal stability and permittivity of flexible composite films based on BaTiO3 nanoparticles highly filled PVDF/PAN blend nanofibrous membranes | |
| CN116922915A (en) | High-temperature-resistant polypropylene film for film capacitor and preparation method thereof | |
| CN113121936A (en) | All-organic composite material film and preparation method and application thereof | |
| WO2023130848A1 (en) | Biaxially oriented polypropylene dielectric film, modified polypropylene material and use thereof | |
| CN110577700A (en) | Polypropylene composite material with high vertical thermal conductivity and excellent mechanical property and preparation method thereof | |
| CN111405750B (en) | Polyimide buries holds printed circuit | |
| CN111253679B (en) | Composite material and preparation method and application thereof | |
| CN109401142B (en) | PVDF (polyvinylidene fluoride) based composite material with sea-island structure and preparation method thereof | |
| CN111341561A (en) | Double-layer dielectric film, preparation method thereof and film capacitor | |
| CN111978575A (en) | Graphene-disordered carbon sandwich structure polymer-based dielectric composite material | |
| CN114300176B (en) | Conductive paste and preparation method and application thereof | |
| CN115926231B (en) | Layered polyester-based high-energy-storage composite medium film and preparation method and application thereof | |
| WO2024050688A1 (en) | Composite polymer film, manufacturing method therefor, metallized composite polymer film, and use | |
| CN115651565A (en) | High-strength high-temperature-resistant antistatic release film | |
| CN117866287A (en) | Graphite nano-sheet in-situ growth boron nitride composite material, preparation method thereof and heat conducting polymer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |