CN105111482A - Acetylene-black-mixed polypropylene-based composite dielectric film used for film capacitor and preparation method thereof - Google Patents
Acetylene-black-mixed polypropylene-based composite dielectric film used for film capacitor and preparation method thereof Download PDFInfo
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- CN105111482A CN105111482A CN201510467081.0A CN201510467081A CN105111482A CN 105111482 A CN105111482 A CN 105111482A CN 201510467081 A CN201510467081 A CN 201510467081A CN 105111482 A CN105111482 A CN 105111482A
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Abstract
The invention relates to the field of preparation of dielectric film materials, specifically to an acetylene-black-mixed polypropylene-based composite dielectric film used for a film capacitor and a preparation method thereof. The composite film uses a polypropylene film with a thickness of less than or equal to 5 [mu]m as a base film, and the surface of the base film is coated with an acetylene-black-mixed nanometer crystalline cellulose/polyvinylidene chloride composite coating with the thickness of 5 [mu]m; pre-prepared coating liquid has good film-forming property and rheological property and is strong in adhesive strength with the polypropylene film; the obtained dried coating on the surface of the polypropylene film has excellent mechanical property, impact resistance, high dielectric constant and low dielectric loss; advantages of organic/inorganic dielectric materials are fully combined, so product processing performance is improved; meanwhile, production and preparation process is simple and suitable for large-scale production and can be applied in production of small-type and high-capacity film capacitors.
Description
Technical field
The present invention relates to dielectric film material preparation field, be specifically related to polypropylene-base compound dielectric film of a kind of membrane capacitance blending acetylene black and preparation method thereof.
Background technology
Film capacitor, also known as plastic film capacitor, is that in all film capacitors, polypropylene capacitor is most widely used in actual use with the advantage of its uniqueness using plastics film as a dielectric class electrical condenser.Along with the development of industry, the requirement of electronic product to performances such as electrical condenser lightweight, heavy body is more and more higher, but the specific inductivity of polypropylene film is on the low side, is difficult to make high performance electrical condenser, governs the application of polypropylene capacitor.
Commonly at present mainly in polypropylene, fill the organic of high-k or mineral compound for the method improving polypropylene film specific inductivity, organic dielectric materials snappiness is good, the advantages such as easy machine-shaping, but there is the shortcoming such as non-refractory, less stable, and the defect of Inorganic Dielectric Material is that film processing properties is poor, and dielectric loss increases.Therefore, research and development one roughly the same time possess inorganic/organic dielectric materials advantage composite dielectric material be the development trend of industry, be also the potential research direction widening polypropylene film capacitor.
Summary of the invention
The object of the invention is to, provide polypropylene-base compound dielectric film of a kind of membrane capacitance blending acetylene black and preparation method thereof, to achieve these goals, the technical solution used in the present invention is as follows:
A kind of polypropylene-base compound dielectric film of membrane capacitance blending acetylene black, it is characterized in that, this dielectric film with thickness≤5 μm polypropylene film for basement membrane, and the compound coating in membrane surface coating thickness≤5 μm, described compound coating is made up of the raw material of following weight part: polyvinyl formal 0.4-0.5, acetylene black 4-5, Dopamine HCL 0.1-0.2, alcohol ether solvent 10-15, polyether modified silicon oil 0.1-0.2, polyvinylpyrrolidone 1-2, N, N-N,N-DIMETHYLACETAMIDE 20-25, Macrogol 4000 .3-0.5, nanocrystal Mierocrystalline cellulose 2-3, polyvinylidene chloride 10-12.
Polypropylene-base compound dielectric film of described a kind of membrane capacitance blending acetylene black and preparation method thereof, it is characterized in that, described preparation method is:
(1) preparation of composite coating liquid: first polyvinyl formal, poly(oxyethylene glycol) 400 are dropped in alcohol ether solvent, heated and stirred makes it dissolve completely, drop in solution by acetylene black subsequently, ultrasonic agitation dispersion makes acetylene black be uniformly dispersed completely, and gained dispersion liquid is for subsequent use; Then polyvinylidene chloride, nanocrystal Mierocrystalline cellulose are dropped into N, in N-N,N-DIMETHYLACETAMIDE, heated and stirred makes solid substances dissolve completely, add the acetylene black dispersion liquid of previously preparation again, after being uniformly mixed 20-30min, add other leftover materials, be uniformly mixed disposed slurry ball-milling processing 30-40min, and mixed slurry is carried out de-bubble process, obtain nanocrystal Mierocrystalline cellulose/polyvinylidene chloride composite coating liquid for subsequent use;
(2) composite coating liquid step (1) prepared utilizes and reverses the two sides of roller kiss-type coating method even spread to polypropylene film, and utilize warm air drying and method for far-infrared drying simultaneously, drying treatment under 80-120 DEG C of condition, must this polypropylene-base compound dielectric film after complete drying.
Compound dielectric film advantage prepared by the present invention is: the nanocrystal Mierocrystalline cellulose/polyvinylidene chloride composite coating liquid of blending acetylene black has good film-forming properties and rheological, strong with polypropylene film bonding force, gained coating good mechanical performance after polypropylene film surface drying, shock resistance, there is higher specific inductivity and lower dielectric loss, combine the advantage of organic/inorganic dielectric material fully, Product processing performance improves, and manufacture process is simple, be applicable to scale operation, can be used for the membrane capacitance of production miniaturization and high capacity.
Embodiment
Embodiment
Polypropylene film thickness in the present embodiment is 5 μm, compound coating thickness is 5 μm, wherein compound coating is made up of following raw material: polyvinyl formal 0.4, acetylene black 4.5, Dopamine HCL 0.1, alcohol ether solvent 14, polyether modified silicon oil 0.1, polyvinylpyrrolidone 1.5, N,N-dimethylacetamide 23, Macrogol 4000 .4, nanocrystal Mierocrystalline cellulose 2.5, polyvinylidene chloride 12.
The preparation method of the polypropylene-base compound dielectric film of described a kind of membrane capacitance blending acetylene black is:
(1) preparation of composite coating liquid: first polyvinyl formal, poly(oxyethylene glycol) 400 are dropped in alcohol ether solvent, heated and stirred makes it dissolve completely, drop in solution by acetylene black subsequently, ultrasonic agitation dispersion makes acetylene black be uniformly dispersed completely, and gained dispersion liquid is for subsequent use; Then polyvinylidene chloride, nanocrystal Mierocrystalline cellulose are dropped into N, in N-N,N-DIMETHYLACETAMIDE, heated and stirred makes solid substances dissolve completely, add the acetylene black dispersion liquid of previously preparation again, after being uniformly mixed 25min, add other leftover materials, be uniformly mixed disposed slurry ball-milling processing 35min, and mixed slurry is carried out de-bubble process, obtain nanocrystal Mierocrystalline cellulose/polyvinylidene chloride composite coating liquid for subsequent use;
(2) composite coating liquid step (1) prepared utilizes and reverses the two sides of roller kiss-type coating method even spread to polypropylene film, and utilize warm air drying and method for far-infrared drying simultaneously, drying treatment under 80-120 DEG C of condition, must this polypropylene-base compound dielectric film after complete drying.
The performance index of the laminated film obtained by the present embodiment are as follows:
Tensile strength is: 68.5MPa; Elongation at break: 45%; Volume specific resistance: 2.8 × 10
15Ω .cm; Under room temperature condition 1KHz frequency, specific inductivity is: 77, dielectric loss≤0.5% of condition elder generation, and laminated film is horizontal percent thermal shrinkage≤1% place 15min under 120 DEG C of conditions after, longitudinal percent thermal shrinkage≤2%.
Claims (2)
1. the membrane capacitance polypropylene-base compound dielectric film of blending acetylene black, it is characterized in that, this dielectric film with thickness≤5 μm polypropylene film for basement membrane, and the compound coating in membrane surface coating thickness≤5 μm, described compound coating is formed by the preparation of raw material of following weight part: polyvinyl formal 0.4-0.5, acetylene black 4-5, Dopamine HCL 0.1-0.2, alcohol ether solvent 10-15, polyether modified silicon oil 0.1-0.2, polyvinylpyrrolidone 1-2, N, N-N,N-DIMETHYLACETAMIDE 20-25, Macrogol 4000 .3-0.5, nanocrystal Mierocrystalline cellulose 2-3, polyvinylidene chloride 10-12.
2. the preparation method of the polypropylene-base compound dielectric film of a kind of membrane capacitance blending acetylene black as claimed in claim 1, it is characterized in that, described preparation method is:
(1) preparation of composite coating liquid: first polyvinyl formal, poly(oxyethylene glycol) 400 are dropped in alcohol ether solvent, heated and stirred makes it dissolve completely, drop in solution by acetylene black subsequently, ultrasonic agitation dispersion makes acetylene black be uniformly dispersed completely, and gained dispersion liquid is for subsequent use; Then polyvinylidene chloride, nanocrystal Mierocrystalline cellulose are dropped into N, in N-N,N-DIMETHYLACETAMIDE, heated and stirred makes solid substances dissolve completely, add the acetylene black dispersion liquid of previously preparation again, after being uniformly mixed 20-30min, add other leftover materials, be uniformly mixed disposed slurry ball-milling processing 30-40min, and mixed slurry is carried out de-bubble process, obtain nanocrystal Mierocrystalline cellulose/polyvinylidene chloride composite coating liquid for subsequent use;
(2) composite coating liquid step (1) prepared utilizes and reverses the two sides of roller kiss-type coating method even spread to polypropylene film, and utilize warm air drying and method for far-infrared drying simultaneously, drying treatment under 80-120 DEG C of condition, must this polypropylene-base compound dielectric film after complete drying.
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Citations (5)
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| CN101434708A (en) * | 2008-12-19 | 2009-05-20 | 成都中科来方能源科技有限公司 | Aqueous polymer modified micropore polyolefin barrier diaphragm, and preparation and use thereof |
| CN101978446A (en) * | 2008-03-19 | 2011-02-16 | 大金工业株式会社 | Coating composition for forming highly dielectric film and highly dielectric film |
| CN102617958A (en) * | 2012-04-12 | 2012-08-01 | 北京化工大学 | Polyvinylidene difluoride-trifluoroethylene/ nickel doped titanium dioxide composite film |
| CN104086866A (en) * | 2014-07-01 | 2014-10-08 | 安徽江威精密制造有限公司 | Special filler for high-strength anti-aging capacitor thin films and preparation method thereof |
| CN104479161A (en) * | 2013-11-21 | 2015-04-01 | 东莞市长安东阳光铝业研发有限公司 | Polyvinylidene fluoride/polypropylene composite film for film capacitor and preparation method |
-
2015
- 2015-08-03 CN CN201510467081.0A patent/CN105111482A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101978446A (en) * | 2008-03-19 | 2011-02-16 | 大金工业株式会社 | Coating composition for forming highly dielectric film and highly dielectric film |
| CN101434708A (en) * | 2008-12-19 | 2009-05-20 | 成都中科来方能源科技有限公司 | Aqueous polymer modified micropore polyolefin barrier diaphragm, and preparation and use thereof |
| CN102617958A (en) * | 2012-04-12 | 2012-08-01 | 北京化工大学 | Polyvinylidene difluoride-trifluoroethylene/ nickel doped titanium dioxide composite film |
| CN104479161A (en) * | 2013-11-21 | 2015-04-01 | 东莞市长安东阳光铝业研发有限公司 | Polyvinylidene fluoride/polypropylene composite film for film capacitor and preparation method |
| CN104086866A (en) * | 2014-07-01 | 2014-10-08 | 安徽江威精密制造有限公司 | Special filler for high-strength anti-aging capacitor thin films and preparation method thereof |
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