Graphene dried powder and method for its preparation

The present invention relates to a process for preparing graphene dried powder, comprising a) sonication of graphite in a mixture of water and a volatile organic solvent; b) centrifugation of the product obtained in step a); c) filtration of the product obtained in step b) to remove graphene flakes...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CARCELÉN VALERO, VERÓNICA, AZANI, MOHAMMAD-REZA, MIRANDA SORIANO, RODOLFO, ZAMORA ABANADES, FÉLIX JUAN, DOBLARÉ CASTELLANO, MANUEL, MAS-BALLESTÉ, RUBÉN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOUNDS THEREOF CORRECTING FLUIDS DYES FILLING PASTES INKS INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention relates to a process for preparing graphene dried powder, comprising a) sonication of graphite in a mixture of water and a volatile organic solvent; b) centrifugation of the product obtained in step a); c) filtration of the product obtained in step b) to remove graphene flakes having lateral dimensions larger than 1 µm x 1 µm; d) addition of a precipitating agent to the solution obtained in step c) to precipitate the graphene flakes, and filtration to collect graphene dried powder; or alternatively, d') solvent evaporation to obtain graphene dried powder. The invention also relates to the graphene dried powder obtainable by said process and its use for preparing a graphene flake composition for coating surfaces.