Graphene oxide composite membranes
OwnerNathan Julius GRISHKEWICH, Mahshid CHEKINI +3inventors
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.
Claims11
An ink composition comprising 60-99.999 wt % of graphene oxide (GO) and 0.001-40 wt % of an aldehyde-modified cellulose nanomaterial (ACN) dispersed in an aqueous medium, an alcohol or a mixture thereof, all weight percentages based on weight sum of the GO and the ACN.
An ink composition comprising 80-95 wt % of graphene oxide (GO) and 5-20 wt % of an aldehyde-modified cellulose nanomaterial (ACN) dispersed in an alcohol, all weight percentages based on weight sum of the GO and the ACN, wherein the ACN comprises aldehyde-modified cellulose nanofibers (ACNF) or aldehyde-modified cellulose nanocrystals (ACNC).
An ink composition comprising 90 wt % of graphene oxide (GO) and 10 wt % of an aldehyde-modified cellulose nanomaterial (ACN) dispersed in a solvent comprising ethanol, all weight percentages based on weight sum of the GO and the ACN, wherein the ACN comprises aldehyde-modified cellulose nanofibers (ACNF) or aldehyde-modified cellulose nanocrystals (ACNC).
Dependencies are inferred from the claim text.