Graphene oxide composite membranes
AssigneeEvercloak Inc.
InventorsNathan Julius Grishkewich, Mahshid Chekini, Periklis Dimitrios Alikiotis, Cecilia Natalina Cancellara, Michael Allan Pope
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Abstract
A system involves interleaving high aspect ratio, rod-like aldehyde-modified cellulose nanomaterials (ACN) between graphene oxide (GO) sheets and utilizing crosslinkers to create a dense, crosslinked network that is highly permeable and selective to a molecule of interest, especially water and water vapor, and does not delaminate in water. This system, especially when combined with oxidative surface treatment of a membrane support substrate, leads to improved adhesion of the membrane on the substrate.
Claims16
A separation membrane comprising:
- a surface functionalized substrate porous to a molecule of interest;
- and,
- a film of a crosslinked composite deposited on the substrate, the composite comprising 60-99.999 wt % of graphene oxide (GO) and 0.001-40 wt % of an aldehyde-modified cellulose nanomaterial (ACN), all weight percentages based on weight sum of the GO and the ACN.
Dependencies are inferred from the claim text.