Single crystal graphene or polycrystalline graphene matrix composite containing carbon-based fillers
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United States of America Patent
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Oct 20, 2020
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Jan 11, 2018
app pub date -
Sep 21, 2017
filing date -
Dec 5, 2012
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Abstract
A process for producing a unitary graphene matrix composite, the process comprising: (a) preparing a graphene oxide gel having graphene oxide molecules dispersed in a fluid medium, wherein the graphene oxide gel is optically transparent or translucent; (b) mixing a carbon or graphite filler phase in said graphene oxide gel to form a slurry; (c) dispensing said slurry onto a surface of a supporting substrate or a cavity of a molding tool; (d) partially or completely removing the fluid medium from the slurry to form a composite precursor; and (e) heat-treating the composite precursor to form the unitary graphene composite at a temperature higher than 100° C. This composite exhibits a combination of exceptional thermal conductivity, electrical conductivity, mechanical strength, surface hardness, and scratch resistance.
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