CN105038433A - Nanometer-titania-doped polypropylene-based composite dielectric film used for film capacitors and preparation method of nanometer-titania-doped polypropylene-based composite dielectric film - Google Patents
Nanometer-titania-doped polypropylene-based composite dielectric film used for film capacitors and preparation method of nanometer-titania-doped polypropylene-based composite dielectric film Download PDFInfo
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- CN105038433A CN105038433A CN201510478667.7A CN201510478667A CN105038433A CN 105038433 A CN105038433 A CN 105038433A CN 201510478667 A CN201510478667 A CN 201510478667A CN 105038433 A CN105038433 A CN 105038433A
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Abstract
The invention relates to the field of dielectric film material preparation, in particular to a nanometer-titania-doped polypropylene-based composite dielectric film used for film capacitors and a preparation method of the nanometer-titania-doped polypropylene-based composite dielectric film. A polypropylene film with the thickness smaller than or equal to 5 micrometers serves as a base film of the composite film. The surface of the base film is coated with a nanometer-titania-doped high-substitution-degree cyanoethyl cellulose/polyvinylidene chloride composite coating with the thickness smaller than or equal to 5 micrometers. Prepared coating liquid has a high film-forming property and a high rheological property, the polypropylene film combinability of the coating liquid is high, and the coating obtained after drying is excellent in mechanical property, has a high dielectric constant and low dielectric loss, and is compact and smooth in film layer, resistant to temperature and capable of preventing water, the advantages of organic/inorganic dielectric materials are fully combined, the machinability is high, and the nanometer-titania-doped polypropylene-based composite dielectric film is suitable for large-scale production and can be used for producing miniaturized, high-capacity and light 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 nano titanium oxide 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 nano titanium oxide 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 nano titanium oxide, 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: highly cyanoethyl cellulose 3-5, nano titanium oxide 4-5, alcohol ether solvent 10-15, polyether modified silicon oil 0.1-0.2, polyvinylpyrrolidone 1-2, N,N-dimethylacetamide 20-25, Macrogol 4000 .3-0.5, polyvinylidene chloride 10-12.
Polypropylene-base compound dielectric film of described a kind of membrane capacitance blending nano titanium oxide and preparation method thereof, it is characterized in that, described preparation method is:
(1) preparation of composite coating liquid: first poly(oxyethylene glycol) 400 is dropped in alcohol ether solvent, heated and stirred makes it dissolve completely, drop in solution by nano titanium oxide subsequently, ultrasonic agitation dispersion makes nano titanium oxide be uniformly dispersed completely, and gained dispersion liquid is for subsequent use; Then polyvinylidene chloride, highly cyanoethyl cellulose are dropped into N, in N-N,N-DIMETHYLACETAMIDE, heated and stirred makes solid substances dissolve completely, add the nano titanium oxide dispersion 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 highly cyanoethyl 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 blending highly cyanoethyl cellulose of nano titanium oxide/polyvinylidene chloride composite coating liquid, this coating solution has good film-forming properties and rheological, good with polypropylene film associativity, gained coating good mechanical performance after dry, there is high specific inductivity and lower dielectric loss, rete densification is smooth, heatproof waterproof, combine the advantage of organic/inorganic dielectric material fully, good processability, be applicable to scale operation, can be used for production miniaturization and high capacity, light-weighted membrane capacitance.
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: highly cyanoethyl cellulose 4, nano titanium oxide 4.5, alcohol ether solvent 15, polyether modified silicon oil 0.2, polyvinylpyrrolidone 1.5, N,N-dimethylacetamide 23, Macrogol 4000 .4, polyvinylidene chloride 11.
The preparation method of the polypropylene-base compound dielectric film of described a kind of membrane capacitance blending nano titanium oxide is:
(1) preparation of composite coating liquid: first poly(oxyethylene glycol) 400 is dropped in alcohol ether solvent, heated and stirred makes it dissolve completely, drop in solution by nano titanium oxide subsequently, ultrasonic agitation dispersion makes nano titanium oxide be uniformly dispersed completely, and gained dispersion liquid is for subsequent use; Then polyvinylidene chloride, highly cyanoethyl cellulose are dropped into N, in N-N,N-DIMETHYLACETAMIDE, heated and stirred makes solid substances dissolve completely, add the nano titanium oxide dispersion 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 highly cyanoethyl 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 120 DEG C of conditions, 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: 78.2MPa; Elongation at break: 45%; Volume specific resistance: 2.5 × 10
15Ω .cm; Under room temperature condition 1KHz frequency, specific inductivity is: 78, 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 nano titanium oxide, 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: highly cyanoethyl cellulose 3-5, nano titanium oxide 4-5, alcohol ether solvent 10-15, polyether modified silicon oil 0.1-0.2, polyvinylpyrrolidone 1-2, N,N-dimethylacetamide 20-25, Macrogol 4000 .3-0.5, polyvinylidene chloride 10-12.
2. the preparation method of the polypropylene-base compound dielectric film of a kind of membrane capacitance blending nano titanium oxide as claimed in claim 1, it is characterized in that, described preparation method is:
(1) preparation of composite coating liquid: first poly(oxyethylene glycol) 400 is dropped in alcohol ether solvent, heated and stirred makes it dissolve completely, drop in solution by nano titanium oxide subsequently, ultrasonic agitation dispersion makes nano titanium oxide be uniformly dispersed completely, and gained dispersion liquid is for subsequent use; Then polyvinylidene chloride, highly cyanoethyl cellulose are dropped into N, in N-N,N-DIMETHYLACETAMIDE, heated and stirred makes solid substances dissolve completely, add the nano titanium oxide dispersion 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 highly cyanoethyl 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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| Application Number | Priority Date | Filing Date | Title |
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| CN201510478667.7A CN105038433A (en) | 2015-08-03 | 2015-08-03 | Nanometer-titania-doped polypropylene-based composite dielectric film used for film capacitors and preparation method of nanometer-titania-doped polypropylene-based composite dielectric film |
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| CN201510478667.7A CN105038433A (en) | 2015-08-03 | 2015-08-03 | Nanometer-titania-doped polypropylene-based composite dielectric film used for film capacitors and preparation method of nanometer-titania-doped polypropylene-based composite dielectric film |
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| CN105038433A true CN105038433A (en) | 2015-11-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158375A (en) * | 2016-08-17 | 2016-11-23 | 郑州华佳新能源技术有限公司 | A kind of preparation method of capacitor high dielectric constant film |
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| CN102336928A (en) * | 2011-07-08 | 2012-02-01 | 北京理工大学 | Flexible, environmentally-friendly, transparent and adjustable-illuminant-color film material and preparation method thereof |
| CN102617958A (en) * | 2012-04-12 | 2012-08-01 | 北京化工大学 | Polyvinylidene difluoride-trifluoroethylene/ nickel doped titanium dioxide composite film |
| CN103224705A (en) * | 2013-05-09 | 2013-07-31 | 江门市道生工程塑料有限公司 | Nano-modified polyimide composite film and preparation method thereof |
| CN103358631A (en) * | 2013-07-19 | 2013-10-23 | 广东生益科技股份有限公司 | Dielectric layer for embedded capacitance material, embedded capacitance material, preparation method and use of embedded capacitance material |
| 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 |
| CN104672502A (en) * | 2015-03-04 | 2015-06-03 | 北京理工大学 | Cyanoethyl cellulose based high-dielectric flexible nano-composite film and preparation method thereof |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN102336928A (en) * | 2011-07-08 | 2012-02-01 | 北京理工大学 | Flexible, environmentally-friendly, transparent and adjustable-illuminant-color film material and preparation method thereof |
| CN102617958A (en) * | 2012-04-12 | 2012-08-01 | 北京化工大学 | Polyvinylidene difluoride-trifluoroethylene/ nickel doped titanium dioxide composite film |
| CN103224705A (en) * | 2013-05-09 | 2013-07-31 | 江门市道生工程塑料有限公司 | Nano-modified polyimide composite film and preparation method thereof |
| CN103358631A (en) * | 2013-07-19 | 2013-10-23 | 广东生益科技股份有限公司 | Dielectric layer for embedded capacitance material, embedded capacitance material, preparation method and use of embedded capacitance material |
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| CN106158375A (en) * | 2016-08-17 | 2016-11-23 | 郑州华佳新能源技术有限公司 | A kind of preparation method of capacitor high dielectric constant film |
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