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Highly-oriented arrangement core-shell structure fiber polyvinylidene fluoride-based composite medium and preparation method thereof

A polyvinylidene fluoride, core-shell structure technology, applied in the field of dielectric capacitors, can solve the problems of low energy storage density, low dielectric breakdown strength, etc., and achieve the effects of reducing breakdown probability, low equipment price, and low loss

Inactive Publication Date: 2019-01-25
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 problems of low dielectric breakdown strength and low energy storage density at the present stage, the present invention provides a polyvinylidene fluoride-based composite with high directional arrangement core-shell structure fibers with high energy storage density and high breakdown strength. Medium and its preparation method

Method used

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  • Highly-oriented arrangement core-shell structure fiber polyvinylidene fluoride-based composite medium and preparation method thereof
  • Highly-oriented arrangement core-shell structure fiber polyvinylidene fluoride-based composite medium and preparation method thereof
  • Highly-oriented arrangement core-shell structure fiber polyvinylidene fluoride-based composite medium and preparation method thereof

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specific Embodiment approach 1

[0042] Specific implementation method 1: The polyvinylidene fluoride-based composite medium with highly oriented arrangement core-shell structure fiber provided by this embodiment is composed of highly oriented anisotropic core-shell structure BZCT@SiO 2NFs filling phase and PVDF composite, the core-shell structure BZCT@SiO 2 Highly oriented arrangement of NFs filling phase in composite media, BZCT@SiO 2 NFs have a core-shell fiber structure, the core layer is barium calcium zirconate titanate, and the shell layer is silicon oxide.

[0043] The preparation method of the above-mentioned polyvinylidene fluoride-based composite medium with highly oriented arrangement of core-shell structure fibers first adopts the sol-gel method and electrospinning technology to prepare the inorganic fiber filling phase with a large aspect ratio, and then conducts the carbon dioxide Silicon wrapping, followed by compounding with polyvinylidene fluoride (PVDF), and quenching treatment, to obtai...

specific Embodiment approach 2

[0049] Specific implementation mode 2: The polyvinylidene fluoride-based composite medium with highly directional arrangement core-shell structure fiber provided by this embodiment is composed of highly directional arrangement anisotropic core-shell structure BZCT@SiO 2 NFs filling phase and PVDF composite, the core-shell structure BZCT@SiO 2 Highly oriented arrangement of NFs filling phase in composite media, BZCT@SiO 2 NFs has a core-shell fiber structure, the core layer is barium calcium zirconate titanate, the shell layer is silicon oxide, and the core-shell structure is BZCT@SiO 2 The content of NFs filling phase in the composite medium is 3vol%.

[0050] The preparation steps of the above-mentioned polyvinylidene fluoride-based composite medium with core-shell structure fibers in highly oriented arrangement are as follows:

[0051] Step 1: 4.7g barium hydroxide octahydrate [Ba(OH) 2 ·8H 2 O] and 0.2 g calcium hydroxide [Ca(OH) 2 ] dissolved in 16mL acetic acid s...

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Abstract

The invention discloses a highly-oriented arrangement core-shell structure fiber polyvinylidene fluoride-based composite medium and a preparation method thereof, wherein the composite medium is formedby compounding a core-shell structure BZCT@SiO2NFs filling phase and PVDF, the BZCT@SiO2NFs is a core-shell fiber structure, the core layer is barium calcium zirconate titanate, and the shell layer is silicon oxide. According to the present invention, an inorganic fiber filling phase having a large aspect ratio is prepared by using a sol-gel method and an electrospinning technology, the inorganicfiber filling phase is encapsulated with silica, the obtained material and PVDF are compounded, and quenching treatment is performed to obtain the dense highly-oriented one-dimensional core-shell structure inorganic fiber-PVDF-based composite film; and the highly-oriented arrangement one-dimensional core-shell structure inorganic fiber-PVDF-based composite film medium can significantly improve the dielectric property, the breakdown property and the energy storage property so as to maintain the excellent electrical insulation property and the mechanical properties of the polymer.

Description

technical field [0001] The invention belongs to the field of dielectric capacitors, and relates to a polymer-based dielectric nanocomposite material and a preparation method thereof, in particular to a one-dimensional core-shell structure inorganic filling phase-polymer-based composite medium and a preparation method thereof. Background technique [0002] The requirements for advanced dielectric materials in the field of power electronics are constantly increasing, among which polymer-based dielectric nanocomposites have broad application prospects. However, simultaneously improving the dielectric properties and electrical breakdown strength of composite materials is still an important challenge faced by researchers for a long time. In addition, there is a large dielectric difference between the inorganic filling phase and the polymer matrix, which will lead to uneven distribution of the local electric field inside the composite medium, destroying its breakdown resistance, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K9/02C08K7/08
CPCC08K7/08C08K9/02C08L27/16
Inventor 张月迟庆国刘立柱张昌海王暄
Owner HARBIN UNIV OF SCI & TECH
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