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Graphene aerogel phase-change composite material with oriented heat conduction characteristics and preparation method thereof
The invention relates to a graphene aerogel phase-change composite material with oriented heat conduction characteristics and a preparation method thereof. The method comprises the following steps: mixing a graphene oxide solution with expanded graphite to form uniform dispersion liquid, and freezing the dispersion liquid in a liquid nitrogen atmosphere to obtain ice-containing GO/EG anisotropic mixed hydrogel; freeze-drying the ice-containing GO/EG anisotropic mixed hydrogel in a freeze dryer to obtain GO/EG anisotropic aerogel; heating the GO/EG anisotropic aerogel in an oven to obtain rGO/EG anisotropic mixed aerogel; and putting the rGO/EG anisotropic mixed aerogel into molten paraffin, after the paraffin is adsorbed to be saturated, naturally cooling the paraffin, obtaining the rGO/EGanisotropic mixed aerogel phase-change composite material, and therefore the obtained graphene aerogel phase-change composite material has oriented heat conduction performance and good stability.
本发明涉及一种具有取向导热特性的石墨烯气凝胶相变复合材料及其制备方法，该方法包括：将氧化石墨烯溶液与膨胀石墨混合形成均匀的分散液，将分散液置于液氮氛围中冷冻，获得含冰的GO/EG各向异性混合水凝胶；将含冰的GO/EG各向异性混合水凝胶在冻干机中冻干，得到GO/EG各向异性气凝胶；将GO/EG各向异性气凝胶置于烘箱中加热，得到rGO/EG各向异性混合气凝胶；将rGO/EG各向异性混合气凝胶放入熔化的石蜡中，待石蜡吸附至饱和，自然冷却，即得到rGO/EG混合气凝胶相变复合材料，得到的石墨烯气凝胶相变复合材料具有取向导热性能及良好稳定性。
Graphene aerogel phase-change composite material with oriented heat conduction characteristics and preparation method thereof
The invention relates to a graphene aerogel phase-change composite material with oriented heat conduction characteristics and a preparation method thereof. The method comprises the following steps: mixing a graphene oxide solution with expanded graphite to form uniform dispersion liquid, and freezing the dispersion liquid in a liquid nitrogen atmosphere to obtain ice-containing GO/EG anisotropic mixed hydrogel; freeze-drying the ice-containing GO/EG anisotropic mixed hydrogel in a freeze dryer to obtain GO/EG anisotropic aerogel; heating the GO/EG anisotropic aerogel in an oven to obtain rGO/EG anisotropic mixed aerogel; and putting the rGO/EG anisotropic mixed aerogel into molten paraffin, after the paraffin is adsorbed to be saturated, naturally cooling the paraffin, obtaining the rGO/EGanisotropic mixed aerogel phase-change composite material, and therefore the obtained graphene aerogel phase-change composite material has oriented heat conduction performance and good stability.
本发明涉及一种具有取向导热特性的石墨烯气凝胶相变复合材料及其制备方法，该方法包括：将氧化石墨烯溶液与膨胀石墨混合形成均匀的分散液，将分散液置于液氮氛围中冷冻，获得含冰的GO/EG各向异性混合水凝胶；将含冰的GO/EG各向异性混合水凝胶在冻干机中冻干，得到GO/EG各向异性气凝胶；将GO/EG各向异性气凝胶置于烘箱中加热，得到rGO/EG各向异性混合气凝胶；将rGO/EG各向异性混合气凝胶放入熔化的石蜡中，待石蜡吸附至饱和，自然冷却，即得到rGO/EG混合气凝胶相变复合材料，得到的石墨烯气凝胶相变复合材料具有取向导热性能及良好稳定性。
Graphene aerogel phase-change composite material with oriented heat conduction characteristics and preparation method thereof
一种具有取向导热特性的石墨烯气凝胶相变复合材料及其制备方法
ZHANG DONG (Autor:in) / LI CHEN (Autor:in)
28.04.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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