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Thermally conductive hexagonal boron nitride hybrid material and its preparation method and application

A hexagonal boron nitride and mixing technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, fibrous fillers, etc., can solve the problems of unsatisfactory thermal conductivity and heat resistance, unstable thermal conductivity, etc., and achieve improved Stability of work, stable thermal conductivity, and stable performance

Active Publication Date: 2022-02-08
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, provide a heat-conducting hexagonal boron nitride hybrid material and its preparation method, to solve the unstable thermal conductivity, thermal conductivity and heat resistance of existing heat-conducting polymer composite materials Non-ideal technical issues

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  • Thermally conductive hexagonal boron nitride hybrid material and its preparation method and application
  • Thermally conductive hexagonal boron nitride hybrid material and its preparation method and application
  • Thermally conductive hexagonal boron nitride hybrid material and its preparation method and application

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preparation example Construction

[0029] Correspondingly, an embodiment of the present invention also provides a method for preparing the heat-conducting hexagonal boron nitride hybrid material described above. The process of the preparation method is as follows figure 1 shown, including the following steps:

[0030] S01. Prepare a hexagonal boron nitride dispersion: disperse hexagonal boron nitride in a solvent to prepare a hexagonal boron nitride dispersion;

[0031] S02. Prepare a few-layer hexagonal boron nitride suspension: perform a first centrifugation on the hexagonal boron nitride dispersion to collect the upper dispersion; then perform a second centrifugal separation on the upper dispersion to collect the precipitate and carry out drying treatment, and then prepare the dried precipitate into hexagonal boron nitride suspension;

[0032] S03. Prepare a mixture solution containing polymer, hexagonal boron nitride and silver salt: add polymer to the hexagonal boron nitride suspension for mixing treatme...

Embodiment 1

[0048] The invention provides a thermally conductive hexagonal boron nitride hybrid material, which includes hexagonal boron nitride (h-BN) and a polymer layer coated on the hexagonal boron nitride, and the polymer layer is loaded with silver nanoparticles.

[0049] Its preparation method is as follows:

[0050] S11. Stripping of hexagonal boron nitride:

[0051] Mix 2g h-BN and 300ml N-methylpyrrolidone in a 500ml jar, and disperse ultrasonically for 24 hours at room temperature; put the mixed solution after ultrasonic treatment into a 50ml centrifuge tube and centrifuge at 3000rpm in a desktop high-speed centrifuge Finally, take the upper layer solution to obtain a thinner h-BN mixed solution. The obtained h-BN mixed solution with thinner sheets was centrifuged at 10,000 rpm, and the bottom precipitate was collected, washed, and dried to obtain 1.2 g of h-BN with thinner sheets after peeling off.

[0052] S12. Linear polymer coated h-BN:

[0053] Take 0.1g of h-BN with a...

Embodiment 2

[0058] The present invention provides a thermally conductive hexagonal boron nitride hybrid material, the structure of which is the same as that of the thermally conductive hexagonal boron nitride hybrid material in Embodiment 1.

[0059] Its preparation method is as follows:

[0060] S21. Stripping of hexagonal boron nitride:

[0061] Mix 2g h-BN and 300ml N-methylpyrrolidone in a 500ml jar, and ultrasonically disperse at room temperature for 24h. Put the mixed solution after ultrasonic treatment into a 50ml centrifuge tube and centrifuge at a speed of 3000rpm in a desktop high-speed centrifuge, then take the upper layer solution to obtain a thinner h-BN mixed solution. The obtained h-BN mixed solution with thinner sheets was centrifuged at a speed of 10000rpm, and the bottom precipitate was taken, washed and dried to obtain 1.2g of h-BN with thinner sheets after peeling off;

[0062] S22. Linear polymer coated h-BN:

[0063] Take 0.1 g of h-BN with a thin layer and put it...

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Abstract

The invention discloses a heat-conducting hexagonal boron nitride hybrid material, a preparation method and application thereof. The heat-conducting hexagonal boron nitride hybrid material of the present invention includes hexagonal boron nitride, and is characterized in that: the hexagonal boron nitride is coated with a polymer layer, and the polymer layer or / and surface load There are silver nanoparticles. The preparation method includes the following steps: preparing a hexagonal boron nitride dispersion, preparing a few-layer hexagonal boron nitride suspension, preparing a mixture solution containing a polymer, hexagonal boron nitride and silver salt, and reducing the silver salt to the polymer. Silver nanoparticles are generated in situ on the layer. Thermally conductive hexagonal boron nitride hybrid material has high thermal conductivity and heat resistance, and stable performance.

Description

technical field [0001] The invention belongs to the technical field of heat-conducting composite materials, and in particular relates to a heat-conducting hexagonal boron nitride hybrid material and its preparation method and application. Background technique [0002] With the rapid development of the modern electronics industry and the sharp increase in the number of various commercial and household electronic products, especially the miniaturization, integration, lightweight and digitalization of electronic circuits and components, the heat dissipation requirements for electronic components are also increasing. Therefore, in order to achieve effective thermal control, the thermal conductivity of materials is increasingly required. As a traditional heat-conducting material, the application of metal materials in some fields is limited due to their electrical conductivity. Since polymer-based composite materials are considered to be one of the ideal materials that can replac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/12C08K9/10C08K3/38C09K5/14C09C1/00C09C3/10C09C3/06
CPCC09K5/14C08K3/38C08K9/10C08K9/12C09C1/00C09C3/006C09C3/06C09C3/10C08K2003/385
Inventor 朱朋莉高原李刚赵涛孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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