Preparation method of hexagonal boron nitride/polyvinylidene fluoride composite material with excellent dielectric property

A technology of hexagonal boron nitride and polyvinylidene fluoride, applied in nitrogen compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of low breakdown field strength and poor flexibility, achieve low dielectric loss and improve breakdown Simple and reasonable effect of field strength and preparation method

Inactive Publication Date: 2020-02-28
SUZHOU XINENG ENVIRONMENTAL SCI & TECH CO LTD
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Problems solved by technology

But ceramic polymers have lower breakdown field strength and less flexibility

Method used

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  • Preparation method of hexagonal boron nitride/polyvinylidene fluoride composite material with excellent dielectric property

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Experimental program
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Effect test

Embodiment 1

[0029] Preparation of Hexagonal Boron Nitride Nanopowders

[0030] (1) Taking materials and stirring: preparing bulk hexagonal boron nitride powder, the lateral size of which is 1-2 μm, adding the bulk hexagonal boron nitride powder into deionized water, and stirring evenly to obtain a suspension;

[0031] (2) Ultrasonic peeling: the above-mentioned suspension was subjected to ultrasonic peeling through an ultrasonic cell pulverizer, the ultrasonic power was 150W, and the ultrasonic time was 5h;

[0032] (3) Centrifugal extraction: transfer the suspension after ultrasonic stripping to a centrifuge, and centrifuge at a speed of 3000 rpm; take the supernatant, transfer it to a centrifuge, and continue centrifuging at a speed of 10000 rpm;

[0033] (4) Precipitation and drying: The lower part of the centrifuge precipitates into stripped hexagonal boron nitride nanosheets, put the hexagonal boron nitride nanosheets into a vacuum drying oven at a temperature of 80°C, and obtain the...

Embodiment 2

[0036] Composite of hexagonal boron nitride / polyvinylidene fluoride

[0037] (1) Mixing: add the above-mentioned hexagonal boron nitride nanopowder, N,N dimethylformamide and polyvinylidene fluoride into the ball mill tank respectively, the mass ratio of hexagonal boron nitride nanopowder to polyvinylidene fluoride is 1 : 11, ball milling and mixing, the ball ink time is 0.5~1h, to obtain mixed slurry;

[0038] (2) Defoaming: after the ball milling is finished, the mixed slurry is poured into the defoamer, and vacuum treatment is carried out for defoaming;

[0039] (3) Drying: Pour the mixed slurry after defoaming into a mold, and dry at 80°C. After the organic solvent is completely volatilized, demold to obtain the hexagonal boron nitride / polyvinylidene fluoride composite material, The thickness of the hexagonal boron nitride / polyvinylidene fluoride composite material is 10 μm.

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Abstract

The invention relates to a preparation method of a hexagonal boron nitride / polyvinylidene fluoride composite material with an excellent dielectric property. The preparation method comprises: preparation of hexagonal boron nitride nano powder, and compounding of hexagonal boron nitride / polyvinylidene fluoride. The preparation of hexagonal boron nitride nano powder comprises following steps: addinghexagonal boron nitride powder in a block form into deionized water, evenly stirring to obtain a turbid liquid; using an ultrasonic cell crusher to carry out ultrasonic peeling; carrying out secondarycentrifugation to obtain peeled hexagonal boron nitride nano sheets namely precipitates in the lower part of the centrifuge; placing the hexagonal boron nitride nano sheets in a vacuum drying chamber; and drying to obtain the hexagonal boron nitride nano powder. The preparation method is simple; and the prepared hexagonal boron nitride / polyvinylidene fluoride composite material has the advantagesof high breakdown voltage, low dielectric loss, and high energy storage capacity, and a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of a hexagonal boron nitride / polyvinylidene fluoride composite material with excellent dielectric properties. Background technique [0002] New materials refer to newly developed or developing structural materials with excellent properties and functional materials with special properties. In recent years, the new materials researched and developed in the world mainly include new metal materials, fine ceramics, optical fibers, composite materials and so on. [0003] With the rapid development of society, traditional fossil energy is facing the problem of depletion. And most of the energy has to go through the link of storage and reuse in the process of use. Therefore, human beings are actively developing available new energy and improving the efficiency of energy use. Therefore, it is extremely critical to develop energy storage devices wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K3/38C01B21/064
CPCC01B21/0648C01P2004/20C01P2004/62C01P2004/64C08K3/38C08K2003/385C08K2201/011C08L27/16
Inventor 龚明兰
Owner SUZHOU XINENG ENVIRONMENTAL SCI & TECH CO LTD
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