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US 12,285,728 B2Granted
Graphene membranes and methods for making graphene membranes
Assignee2599218 Ontario Inc.
InventorsIan Flint, Nifemi Oguntuase
Life of this patent
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Abstract
A method for making a graphene membrane includes applying a suspension of graphene platelets in a fluid onto a porous substrate, and applying a pressure differential to force the fluid through the substrate to yield a filtered fluid while retaining the graphene platelets on the substrate. The graphene platelets and the substrate form the graphene membrane.
Claims20
A method for making a graphene membrane, comprising:
- a. applying a suspension of iron-functionalized graphene platelets in a fluid onto a porous substrate so that the iron-functionalized graphene platelets are parallel to the porous substrate by spraying the suspension of graphene platelets in the fluid onto an upstream surface of the porous substrate;
- b. applying a vacuum to a downstream surface of the porous substrate to force the fluid through the substrate while retaining the graphene platelets on the substrate, to yield a filtered fluid and a graphene membrane comprising the graphene platelets and the porous substrate;
- and
- c. after steps a. and b., applying a magnetic field to the iron-functionalized graphene platelets to re-orient the iron-functionalized graphene platelets so that the iron-functionalized graphene platelets are non-parallel to the porous substrate.
1 more element
A method for filtering water, comprising:
- a. making a filter by i) applying a suspension of iron functionalized graphene platelets in a fluid onto a porous substrate so that the iron-functionalized graphene platelets are parallel to the porous substrate by spraying the suspension of graphene platelets in the fluid onto an upstream surface of the porous substrate, ii) applying a vacuum to a downstream surface of the porous substrate to force the fluid through the substrate while retaining the graphene platelets on the substrate, to yield a filter comprising the graphene platelets and the porous substrate;
- and iii) after steps i) and ii), applying a magnetic field to the iron-functionalized graphene platelets to re-orient the iron-functionalized graphene platelets so that the iron-functionalized graphene platelets are non-parallel to the porous substrate;
- and
- b. passing water between the graphene platelets of the filter, to filter the water.
1 more element
A method for making a graphene membrane comprising:
- a. applying iron-functionalized graphene platelets onto a substrate so that the iron-functionalized graphene platelets are parallel to the substrate;
- and
- b. after step a., applying a magnetic field to the iron-functionalized graphene platelets to re-orient the iron-functionalized graphene platelets so that the iron-functionalized graphene platelets are non-parallel to the substrate.
Dependencies are inferred from the claim text.