Thermally conductive polymer composite material and its preparation method and application
A technology of thermally conductive polymers and composite materials, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as unsatisfactory thermal conductivity, achieve excellent thermal conductivity and mechanical properties, excellent mechanical properties, and expand the scope of application Effect
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[0025] Correspondingly, an embodiment of the present invention also provides a preparation method of the above-mentioned thermally conductive polymer composite material. The process of the preparation method is as follows figure 1 shown, including the following steps:
[0026] S01. Preparation of a dispersion containing graphene oxide and BN: graphene oxide (GO) and BN are prepared into a dispersion containing GO and BN;
[0027] S02. Preparation of RGO / BN hydrogel: subjecting the dispersion to hydrothermal reduction treatment to obtain RGO / BN hydrogel;
[0028] S03. Prepare an aerogel with an oriented structure: dry the RGO / BN hydrogel at room temperature or under heating conditions to obtain an aerogel with an oriented structure;
[0029] S04. Composite treatment of airgel and resin: composite treatment of the airgel with resin or heat treatment in a protective atmosphere and then composite treatment with resin.
[0030] Specifically, in the dispersion in the above step S...
Embodiment 1
[0041] The invention provides a heat-conducting polymer composite material and a preparation method thereof. Wherein, the thermally conductive polymer composite material is prepared according to the following method:
[0042] S11: Using natural flake graphite as raw material, adopt the improved Hummer method to fully oxidize graphite to obtain graphite oxide, wash it with deionized water until neutral, prepare a graphite oxide aqueous solution with a solid content of 5 mg / ml, and disperse it uniformly into graphene oxide by ultrasonic vibration Add BN powder to the aqueous dispersion to make the solid content of BN in the solution 25 mg / ml, and ultrasonically crush to form a uniform dispersion.
[0043] S12: Pour the RGO / BN dispersion into a hydrothermal kettle, and react at 160° C. for 3 hours to obtain a graphene / BN hydrogel.
[0044] S13: drying the graphene / BN hydrogel at room temperature to obtain an airgel.
[0045] S14: heat the graphene / BN airgel in a graphitization ...
Embodiment 2
[0050] The invention provides a heat-conducting polymer composite material and a preparation method thereof. Wherein, the thermally conductive polymer composite material is prepared according to the following method:
[0051] S21: Using natural flake graphite as raw material, adopt the improved Hummer method to fully oxidize graphite to obtain graphite oxide, wash it with deionized water until neutral, prepare a graphite oxide aqueous solution with a solid content of 5 mg / ml, and disperse it uniformly into graphene oxide by ultrasonic vibration Water dispersion, add BN powder, so that the solid content of BN in the solution is 50mg / ml, and ultrasonically crush to form a uniform dispersion;
[0052] S22: Pour the RGO / BN dispersion into a hydrothermal kettle and react at 160°C for 3 hours to obtain a graphene / BN hydrogel;
[0053] S23: drying the graphene / BN hydrogel at room temperature to obtain an aerogel;
[0054] S24: heating the graphene / BN airgel in a graphitization furn...
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