Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Expanded graphite and graphene composite material and preparation method therefor
The invention relates to an expanded graphite and graphene composite material and a preparation method therefor. The preparation method comprises the steps: preparing a graphene oxide water dispersion, of which the mass fraction is 0.1-10%; uniformly stirring and mixing expanded graphite, of which the expansion ratio is 100-300, and the graphene oxide water dispersion, so as to obtain a homodisperse expanded graphite/graphene oxide water dispersion; putting the expanded graphite/graphene oxide water dispersion in a closed vessel, putting the closed vessel in a muffle furnace, carrying out heat treatment for 1-24 hours at the temperature of 120-260 DEG C, carrying out cooling, then, taking out samples, and drying the samples, so as to obtain expanded graphite/graphene based carbon foam; and connecting expanded graphite by graphene sheet layers so as to jointly form a three-dimensional network structure, wherein the coefficient of thermal conductivity is greater than or equal to 50W/(m.K), and the rebound degree is greater than or equal to 90%. Compared with the traditional mesophase asphalt based carbon foam, graphene oxide based carbon foam and chemical vapor deposition based graphene based carbon foam, the rebound elasticity, thermal conducting capability, production cost and the like of the expanded graphite and graphene composite material are superior.
Expanded graphite and graphene composite material and preparation method therefor
The invention relates to an expanded graphite and graphene composite material and a preparation method therefor. The preparation method comprises the steps: preparing a graphene oxide water dispersion, of which the mass fraction is 0.1-10%; uniformly stirring and mixing expanded graphite, of which the expansion ratio is 100-300, and the graphene oxide water dispersion, so as to obtain a homodisperse expanded graphite/graphene oxide water dispersion; putting the expanded graphite/graphene oxide water dispersion in a closed vessel, putting the closed vessel in a muffle furnace, carrying out heat treatment for 1-24 hours at the temperature of 120-260 DEG C, carrying out cooling, then, taking out samples, and drying the samples, so as to obtain expanded graphite/graphene based carbon foam; and connecting expanded graphite by graphene sheet layers so as to jointly form a three-dimensional network structure, wherein the coefficient of thermal conductivity is greater than or equal to 50W/(m.K), and the rebound degree is greater than or equal to 90%. Compared with the traditional mesophase asphalt based carbon foam, graphene oxide based carbon foam and chemical vapor deposition based graphene based carbon foam, the rebound elasticity, thermal conducting capability, production cost and the like of the expanded graphite and graphene composite material are superior.
Expanded graphite and graphene composite material and preparation method therefor
FENG WEI (Autor:in) / QIN MENGMENG (Autor:in) / FENG YIYU (Autor:in)
04.11.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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