Method for preparation and separation of atomic layer thickness platelets from graphite or other layered materials
AssigneeGraphene Laboratories Inc.
InventorsOleksandr Savsunenko, Elena Polyakova, Daniel Stolyarov
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Abstract
A method and system of separating graphene nanoplatelets (GNPs) from initial graphite raw material is disclosed. The raw material is exfoliated to create a percentage of separated GNPs in a resulting bulk mixture. Agglomerates between the separated graphene nanoplatelets are broken. The mixture is separated into fractions having nanoparticles of different GNP content and size distribution. Each different range of nanoparticles is separated into GNPs and graphite nanopowder via a medium flow process or via electrostatic separation or both.
Claims27
A method for enrichment of a mixture of graphene nanoplatelets (GNP) comprising:
- introducing GNP into a separation column;
- increasing the content of the GNP with lower thickness by flow of a medium through the column;
- and
- collecting the resulting GNP with lower thickness.
A method for enrichment of a mixture of graphene nanoplatelets (GNP), comprising:
- providing GNP into a separation column;
- passing the GNP through an electrostatic field in a drift column to separate thinner GNP from thicker GNP to increase the content of the thinner GNP;
- and
- collecting the GNP with increased content.
A method of producing graphene nanoplatelets (GNP) from initial graphite raw material, the method comprising:
- exfoliating the raw material to create a percentage of separated GNP in a resulting bulk mixture;
- breaking agglomerates between the separated GNP in the bulk mixture;
- and
- separating the mixture into fractions having different GNP content and size distribution.
A system for enrichment of a mixture of graphene nanoplatelets (GNP) comprising:
- a feeder;
- a column having medium coupled to the feeder to accept GNP;
- a medium flow control coupled to the column to increase the content of the GNP with lower thickness by controlling the flow of the medium through the column.
A system for enrichment of a mixture of graphene nanoplatelets (GNP) comprising:
- a feeder;
- a drift column coupled to the feeder to accept GNP;
- a charging module to provide electrical charge to the GNP accepted by the column;
- and
- an electrostatic field generator to generate an electrostatic field in the draft column to increase the content of the GNP with smaller thickness.
A system for separating graphene nanoplatelets from initial graphite raw material, the system comprising:
- an exfoliation module for exfoliating the raw material to create a percentage of separated graphene nanoplatelets in a resulting bulk mixture;
- an agglomerate breaking module coupled to the exfoliation module to break up agglomerates between the separated graphene nanoplatelets in the bulk mixture;
- a separation module coupled to the agglomerate breaking module, separating the mixture into particles having different fractions of graphene nanoplatelets content and size distribution;
- and
- a graphene separation module separating graphene nanoplatelets from each different range of nanoparticles via a medium flow.
Dependencies are inferred from the claim text.