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Crosslinking type polyether sulphone base dielectric composite material and preparation method and application thereof

A technology of polyaryl ether sulfone and composite material, applied in the field of cross-linked polyaryl ether sulfone-based dielectric composite material and its preparation, can solve the problems of heat generation, poor dielectric and thermal stability and the like

Active Publication Date: 2018-09-21
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the existing dielectric composite materials heating due to self-loss during work, coupled with the lower Tg of the polymer matrix, showing poor dielectric and thermal stability in a wide temperature range, etc. , and provide a cross-linked polyarylethersulfone-based dielectric composite material and its preparation method and application, which has the advantages of high energy storage density and the like

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  • Crosslinking type polyether sulphone base dielectric composite material and preparation method and application thereof
  • Crosslinking type polyether sulphone base dielectric composite material and preparation method and application thereof
  • Crosslinking type polyether sulphone base dielectric composite material and preparation method and application thereof

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preparation example Construction

[0049] [Preparation method of polyarylethersulfone-based dielectric composite material]

[0050] As previously mentioned, the present invention provides the preparation method of above-mentioned polyarylether sulfone based dielectric composite material, and described method comprises steps as follows:

[0051] The first step: Hydrogen peroxide hydroxylation, γ-methacryloxypropyltrimethoxysilane (MPS) double bond functionalization and benzocyclobutene (BCB) functionalization are carried out on the surface of inorganic nano ceramic particles in sequence to prepare Obtain inorganic nano-ceramic particles with a core-shell structure and use them as inorganic nano-fillers;

[0052] The second step: preparing polyaryl ether sulfone containing allyl side groups, and using it as a polymer matrix;

[0053] The third step: mix the inorganic nano-ceramic particles with core-shell structure in the first step and the polyaryl ether sulfone containing allyl side groups in the second step, ...

Embodiment 1

[0134] The first step: preparing benzocyclobutene functionalized BT-BCB nanoparticles, the preparation method is as follows:

[0135] (1) Add 10g of BaTiO 3 Place in a three-necked flask, and then add 250ml H 2 o 2 (30wt%), ultrasonic dispersion for 30-60 minutes; then filled with BaTiO 3 The three-neck flask of the dispersion liquid was placed in an oil bath, under the protection of argon, with mechanical stirring and reflux at 80-105°C for 4-6h. After the system was cooled to room temperature, it was washed several times with deionized water, then centrifuged, and dried in vacuum at 60°C for 24 hours to obtain hydroxylated barium titanate nanoparticles.

[0136] (2) 5g of hydroxylated barium titanate nanoparticles are placed in a three-necked flask, then 80ml of toluene is added, and ultrasonically separated for 30-60 minutes; then the hydroxylated BaTiO 3The three-necked flask of the dispersion was placed in an oil bath, and then 3g of MPS was added to the dispersion, u...

Embodiment 2

[0147] The other steps are the same as in Example 1, the only difference is that the volume fraction ratio of the inorganic nano-ceramic particles with a core-shell structure in solution A and the polymer matrix in solution B is changed to prepare a cross-linked polyarylether containing 20vol% BT-BCB The sulfone-based dielectric composite film is recorded as 20vol%BT-BCB@30%DPAES.

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Abstract

The invention discloses a crosslinking type polyether sulphone base dielectric composite material and a preparation method and application thereof. The method adopts polyether sulphone with the good thermal and mechanical properties and active functional groups (allyl lateral groups) as a base material of a polymer, meanwhile, inorganic nano ceramic particles are adopted as inorganic nanofiller, organic functionalization modification is performed on the surface of the nanofiller, benzocyclobutene is introduced, inorganic nano ceramic particles with reactable functional groups and core shell structures are formed and adopted as crosslinking points to be subjected to a crosslinking reaction with the polyether sulphone polymer with the active functional groups, a three-dimensional network structure is formed, and the crosslinking type polyether sulphone base dielectric composite material with good heat resistance and flexibility and high energy storage density is prepared. The prepared polyether sulphone base dielectric composite film has a high dielectric constant and the wide temperature application range, meanwhile, the breakdown field strength is obviously improved, and thereforethe high energy storage density under high temperature is obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of dielectric materials and energy storage materials, in particular to a cross-linked polyarylethersulfone-based dielectric composite material with high energy storage density and its preparation method and application. Background technique [0002] With the continuous progress of society and the rapid development of electronic components, the demand for electric energy storage devices in dynamic electronic equipment, static power systems, hybrid electric vehicles and pulse power equipment continues to increase. Polymer-based nanocomposite film materials with high dielectric constant and high energy storage density have been widely studied, which combines the advantages of light polymer, easy processing and high dielectric constant of ferroelectric nano-ceramics. However, the existing dielectric composite materials still have many deficiencies, mainly low breakdown strength at high temperature...

Claims

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Application Information

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IPC IPC(8): C08L81/06C08K9/02C08K9/06C08K9/04C08K3/24C08G75/23C08J5/18
CPCC08G75/23C08J5/18C08J2381/06C08K3/24C08K9/02C08K9/04C08K9/06C08K2201/003C08K2201/011C08L81/06
Inventor 张云鹤刘捷许文瀚金兰姜振华
Owner JILIN UNIV
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