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A kind of sandwich structure nanofiber/polyvinylidene fluoride composite medium and its preparation method

A polyvinylidene fluoride and nanofiber technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of large dielectric loss and low energy storage density, and achieve high breakdown field strength , the effect of increasing the dielectric constant and increasing the number of

Inactive Publication Date: 2019-08-16
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the technical problems of low energy storage density and large dielectric loss of inorganic filling phase / polymer matrix composite medium, the present invention provides a sandwich structure nanofiber / polyvinylidene fluoride composite medium and its preparation method

Method used

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  • A kind of sandwich structure nanofiber/polyvinylidene fluoride composite medium and its preparation method
  • A kind of sandwich structure nanofiber/polyvinylidene fluoride composite medium and its preparation method
  • A kind of sandwich structure nanofiber/polyvinylidene fluoride composite medium and its preparation method

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specific Embodiment approach 1

[0035] Embodiment 1: In this embodiment, a sandwich-structured nanofiber / polyvinylidene fluoride composite medium and a preparation method thereof.

[0036] A sandwich structure nanofiber / polyvinylidene fluoride composite medium, the upper and lower layers of the sandwich structure are PVDF films, the middle layer is CFO@BZT-BCT NFs / PVDF composite medium film, and the three-layer structure medium is combined by hot pressing.

[0037] A preparation method of a sandwich-structured nanofiber / polyvinylidene fluoride composite medium is as follows:

[0038] 1. Measure anhydrous ethanol and acetic acid and pour them into the beaker in turn. After stirring evenly, add acetylacetone to the above mixed solution and continue stirring until uniform. Add Ba(OH) 2 ·8H 2 O was added to the mixed solution, and after it was completely dissolved, the Ca(OH) 2 Add to the mixed solution, wait for Ca(OH) 2 After complete dissolution, the C 20 h 28 ZrO 8 Added to the mixed solution, and fina...

specific Embodiment approach 2

[0045] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the amount of each substance added in step one is 3.8mL absolute ethanol, 9.05mL acetic acid, 1.54mL acetylacetone, 2.17gBa(OH) 2 ·8H 2 O, 0.9gCa(OH) 2 , 0.39gC 20 h 28 ZrO 8 , 2.48mLTi(OC 4 h 9 ) 4 ; The Ti(OC 4 h 9 ) 4 After adding the mixed solution, the continuous stirring time was 30min; the PVP was added to the mixed solution, and the ratio of the mixed solution to the PVP was (14.1-14.5) mL:1g; the stirring time for the complete dissolution of the PVP was 24h. Others are the same as the first embodiment.

specific Embodiment approach 3

[0046] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that PVP is added to the mixed solution as described in step 1, and the ratio of the mixed solution to PVP is 14.3mL:1g. Others are the same as those in the first or second embodiment.

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Abstract

The invention belongs to the field of a compound medium and particularly relates to a nanofiber / PVDF (polyvinylidene fluoride) compound medium with a sandwich structure and a preparation method of the nanofiber / PVDF compound medium. Upper and lower layers of the sandwich structure of the compound medium are PVDF films, a middle layer is a CFO@BZT-BCT NFs / PVDF compound medium film, and the three layers of structure media are combined through hot pressing, wherein the PVDF films are prepared with a solution tape casting method through quenching treatment, and the CFO@BZT-BCT NFs / PVDF compound medium film is prepared through steps as follows: crystalized BZT-BCT NFs is prepared from a BZT-BCT spinning precursor through electrostatic spinning and high-temperature calcination, CFO is introduced, CFO@BZT-BCT NFs is prepared and subjected to surface modification with dopamine hydrochloride, finally, CFO@BZT-BCT NFs is mixed with PVDF, suspension turbid colloid is prepared and subjected to solution tape casting and quenching treatment, and the nanofiber / PVDF compound medium is prepared. The technical problems of low energy density and high dielectric loss of an inorganic filling phase / polymer based compound medium are solved.

Description

technical field [0001] The invention belongs to the field of composite media, and in particular relates to a sandwich-structured nanofiber / polyvinylidene fluoride composite media and a preparation method thereof. Background technique [0002] PVDF (chemical name is polyvinylidene fluoride) is widely used in the field of energy storage due to its excellent properties, such as high dielectric and breakdown characteristics, good chemical stability and processability. Since the energy storage density of the medium is proportional to the relative permittivity and the square of the breakdown field strength, the energy storage material must have as high a breakdown field strength and relative permittivity as possible in order to obtain a higher storage capacity. energy density. At present, there are two main methods for preparing polymer-based composite media with high dielectric constant: the first is to introduce conductive particles into the polymer matrix, and the second is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K9/04C08K9/00C08K7/08C08K3/24C08J5/18B32B27/30B32B27/18B32B27/28B32B27/08B32B37/10B32B37/06
CPCB32B27/08B32B27/18B32B27/28B32B27/304B32B37/06B32B37/10B32B2307/20C08J5/18C08J2327/16C08K3/24C08K7/08C08K9/00C08K9/04C08K2201/011C08L2203/16C08L27/16
Inventor 迟庆国崔洋张月马涛张昌海王暄
Owner HARBIN UNIV OF SCI & TECH
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