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Boronized graphene high-thermal-conductivity slurry and preparation method thereof

A technology with high thermal conductivity and graphene, applied in chemical instruments and methods, heat exchange materials, carbon-silicon compound conductors, etc., can solve the problems of large van der Waals force, insoluble, easy agglomeration, etc., to achieve difficult agglomeration, enhanced Compatibility, effect of improving binding force

Inactive Publication Date: 2020-07-17
牛墨石墨烯应用科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the large van der Waals force between graphene sheets, it is easy to agglomerate, making it difficult to dissolve in water and other commonly used organic solvents.

Method used

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  • Boronized graphene high-thermal-conductivity slurry and preparation method thereof
  • Boronized graphene high-thermal-conductivity slurry and preparation method thereof
  • Boronized graphene high-thermal-conductivity slurry and preparation method thereof

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preparation example Construction

[0039] The preparation method of the boronized graphene high thermal conductivity slurry provided by the invention comprises steps:

[0040] a) Redox graphene and boric acid are added to absolute ethanol, ultrasonically stirred and uniformly dispersed to obtain a mixed material, and after drying the mixed material at 40°C, heat the mixed material at 900°C in an argon atmosphere Solution for 4h to obtain boronized graphene.

[0041] b) Use silane coupling agent to modify boronized graphene, obtain functional boronized graphene by reacting silane coupling agent with boronized graphene, and disperse functional puffed graphene in N-formaldehyde In the base pyrrolidone solution, a functional boronated graphene dispersion is formed.

[0042] c) Adding nano silicon dioxide particles into the functional boronized graphene dispersion liquid under stirring state, and mixing for 30-120 minutes.

[0043] d) In parts by mass, 3-5 parts of functional boronized graphene dispersion containi...

Embodiment 1

[0056] (1) Redox graphene and boric acid were added to absolute ethanol, stirred evenly by ultrasonic, and dried at 40°C, then the mixed material was pyrolyzed at 900°C under argon atmosphere for 4 hours to obtain boronized graphene.

[0057] (2) Use silane coupling agent to modify boronized graphene, and obtain functional boronized graphene through the reaction between coupling agent and boronized graphene. Functionalized graphene is dispersed in NMP solution after ultrasonic treatment to form functional boronized graphene dispersion.

[0058] (3) Add nano-silica particles to the functional boronized graphene dispersion under stirring, and mix for 30 minutes.

[0059] (4) In parts by mass, 3 parts of functional boronized graphene dispersions containing 1.5% boronized graphene, with 20 parts of organic solvents, 4 parts of auxiliary agents and 80 parts of nano silicon dioxide The particles adopt three-dimensional mixing technology, and through the shear force generated by rev...

Embodiment 2

[0070] (1) Redox graphene and boric acid were added to absolute ethanol, ultrasonically stirred to disperse evenly, and after drying at 40°C, the mixed material was pyrolyzed at 900°C for 4 hours under argon atmosphere to obtain boronized graphene.

[0071] (2) Use silane coupling agent to modify boronized graphene, and obtain functional boronized graphene through the reaction of coupling agent and boronized graphene. Functionalized graphene is dispersed in NMP solution after ultrasonic treatment to form functional boronized graphene dispersion.

[0072] (3) Add nano-silica particles to the functional boronized graphene dispersion under stirring, and mix for 60 minutes.

[0073] (4) In parts by mass, 4 parts of functional boronized graphene dispersions containing 2.5% boronized graphene, with 25 parts of organic solvents, 6 parts of auxiliary agents and 80 parts of nano silicon dioxide The particles adopt three-dimensional mixing technology, and through the shear force genera...

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Abstract

The invention provides boronized graphene high-thermal-conductivity slurry and a preparation method thereof. The boronized graphene high-thermal-conductivity slurry is prepared through the following steps of preparing boronized graphene, by a silane coupling agent, modifying the boronized graphene to obtain functional boronized graphene dispersion liquid, adding nano silicon dioxide particles intothe functional graphene boride dispersion liquid in a stirring state, mixing for 30 to 120 minutes according to the mass parts, and fully and uniformly mixing 3-5 parts of the functional boronized graphene dispersion liquid containing 1.5%-3.5% of boronized graphene, 20-30 parts of an organic solvent, 4-8 parts of an auxiliary agent and the balance of nano-silica particles by adopting a three-dimensional mixing technology, so that the boronized graphene high-thermal-conductivity slurry is obtained. Therefore, the binding force of the slurry and the substrate is improved, good adhesive force is shown, and the quality of the heat conduction material is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of preparation of new materials, in particular to a boronized graphene high thermal conductivity slurry and a preparation method thereof. 【Background technique】 [0002] Graphene is a two-dimensional crystalline material composed of closely packed carbon atoms, which has good electrical and thermal conductivity. With the continuous development of the properties of graphene materials, its excellent mechanical properties, thermal conductivity and electrical conductivity play an irreplaceable role in many aspects, especially in recent years, graphene heating materials, graphene anti-corrosion coatings, graphene batteries Materials have been greatly developed. [0003] However, due to the large van der Waals force between graphene sheets, it is easy to agglomerate, making it difficult to dissolve in water and other commonly used organic solvents. In addition, in addition to the poor solubility of graphene in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/08H01B1/04
CPCC09K5/08H01B1/04
Inventor 陈大波冯于界林勇徐佳伟
Owner 牛墨石墨烯应用科技有限公司