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Polymer matrix composite and preparation method thereof

A composite material and polymer technology, which is applied in the field of polymer-based composite materials with high energy storage density and high discharge efficiency and its preparation, can solve the problem of low energy storage density of composite materials, resistance to breakdown field strength of sacrificial composite materials, low Energy storage density and other issues, to achieve the effects of low cost, improved energy storage performance, and increased energy storage density

Inactive Publication Date: 2016-02-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses a large amount of ceramic fillers to prepare composite materials to increase the dielectric constant, sacrifice the breakdown resistance field strength of the composite material, and obtain the energy storage density under low electric field conditions, so that the energy storage density of the prepared composite material lower

Method used

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  • Polymer matrix composite and preparation method thereof
  • Polymer matrix composite and preparation method thereof
  • Polymer matrix composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of BaTiO by Electrospinning 3 nano ceramic fiber, 1.5gBaTiO 3 The nano-ceramic fibers were placed in a mixed solution of aluminum nitrate, PVP and ethanol, the mass ratio of aluminum nitrate, PVP and ethanol was 1:0.02:5, stirred in a water bath at 40°C for 2 hours, the stirring speed was 400r / min, after centrifugation, ethanol Wash, dry, and sinter at 600°C for 2 hours to obtain a nanofiber material with a core-shell structure. The core is barium titanate nano-ceramic fiber, and the shell layer is an alumina coating layer; 3-aminopropyltriethoxysilane (APS) coupling agent, stirred at 100°C for 5 hours, washed with deionized water and absolute ethanol three times, and dried at 80°C for 12 hours, APS surface-modified nanofibrous materials were obtained, and then the modified BaTiO 3 al 2 o 3 Fibers are added to the PVDF / DMF mixture (BaTiO 3 al 2 o 3 The volume ratio of PVDF and PVDF is 2.5:97.5), stirred for 8 hours until evenly mixed, poured the mixtu...

Embodiment 2

[0038] The method is the same as above, except that the BaTiO 3 al 2 o 3 The volume ratio of nanofibrous material to PVDF / DMF is 5:95, and the polymer-based composite film can be prepared.

[0039] The energy storage density of the composite film is as image 3 As shown, it is 6.6J / cm 3 .

Embodiment 3

[0041] The method is the same as above, except that the BaTiO 3 al 2 o 3 The volume ratio of nanofibrous material to PVDF / DMF is 7.5:92.5, and the polymer-based composite film can be prepared.

[0042] The energy storage density of the composite film is as image 3 As shown, it is 6.4J / cm 3 .

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Abstract

The invention relates to a polymer matrix composite and a preparation method thereof. The composite is a laminated film composed of a polyvinylidene difluoride matrix and a nano-fiber material dispersed in the polyvinylidene difluoride matrix. The nano-fiber material is of a core-shell structure, wherein a core layer is made of a ceramic fiber, and a shell layer is an aluminum oxide coating layer. The polymer matrix composite is prepared through the method comprises the following steps: (1) placing the ceramic fiber in mixed solution of aluminum nitrate, polyvinyl pyrrolidone and ethyl alcohol, and after uniform mixing, obtaining the nano-fiber material through sintering; (2) causing the nano-fiber material to undergo surface modification through a coupling agent, then adding the nano-fiber material into mixture of polyvinylidene difluoride and dimethylformamide, performing uniform mixing, pouring the mixture in a casting film machine to form a film through flow-casting, and performing drying to obtain the laminated film; (4) and causing the laminated film to undergo heating and heat insulation, quenching and drying, and obtaining the polymer matrix laminated film. Compared with the prior art, the polymer matrix composite has the advantages that the laminated film is high in energy density, good in energy storage efficiency, simple in preparation process and low in cost.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a polymer-based composite material with high energy storage density and high discharge efficiency and a preparation method thereof. Background technique [0002] Capacitors with high energy storage density have the advantages of large discharge power, high utilization efficiency, fast charge and discharge speed, and stable performance. They play an important role in power systems, electronic devices, and pulse power supplies. They are widely used in hybrid vehicles, pulse power Systems, electromagnetic guns, electromagnetic launch platforms and other modern industrial and national defense fields. With the development of electronic devices in the direction of miniaturization, integration, and high speed, the requirements for high energy storage, miniaturization, light weight, low cost, and high reliability are put forward for capacitive components. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K7/08C08K9/06C08K9/02C08J5/18
Inventor 翟继卫刘少辉李朋沈波
Owner TONGJI UNIV
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