Exfoliation of graphene by multilayer coextrusion
AssigneeEmpire Technology Development LLC
InventorCarlos A. Cruz
Life of this patent
Estimating the term…
Abstract
Exfolilation of graphene from graphite using multilayer coextrusion is generally disclosed. In some example embodiments, graphite may be dispersed within a first processing material, and the first processing material and a second processing material may be co-extruded through a plurality of series coupled layer multiplication dies to exfoliate graphene from the graphite. The graphene may be separated from the resulting multi-layered material. In some example embodiments, graphite flake and/or expanded graphite may be dispersed within the first processing material.
Claims22
An apparatus for producing graphene from graphite, comprising:
- a multilayer co-extrusion device comprising a plurality of series-coupled layer multiplication dies, the multilayer co-extrusion apparatus being configured to exfoliate graphene by co-extrusion of a first processing material and a second processing material through the plurality of series coupled layer multiplication dies to produce a resulting material including a plurality of alternating layers of the first processing material and the second processing material, the first processing material comprising a first graphite material dispersed in a first substrate, the second processing material comprising a second substrate material.
A method of producing graphene from graphite, comprising:
- dispersing a first graphite material in a first substrate material to form a first processing material;
- and
- exfoliating graphene from the first graphite material by co-extrusion of the first processing material and a second processing material through one or more layer multiplication dies to yield a resulting material including individual layers of the first processing material interposed between individual layers of the second processing material, the second processing material comprising a second substrate material.
A method of delaminating a multi-sheet substance, comprising:
- mixing a multi-sheet substance comprising a plurality of stacked sheets with a first substrate material to form a first processing material;
- delaminating one or more sheets from the multi-sheet substance by application of shear stress to the first processing material;
- and
- separating the one or more delaminated sheets from the first substrate material.
Dependencies are inferred from the claim text.