Advanced filtration membranes using chitosan and graphene oxide
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsVictor F Medina, Christopher S Griggs, Jose Mattei-Sosa, Brooke Petery, Luke Gurtowski
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Abstract
A composition of five parts by mass of chitosan and one part graphene oxide is suspended in water. The composition may be used to form filtration layers of any size or shape and may be reinforced by additional layers. The composition may be used to construct a large filtration apparatus of any size or shape and may be used to form highly resilient, antimicrobial structures and surfaces for a variety of applications.
Claims5
A method of making a one-directional fluid flow, water purification or antimicrobial coated apparatus comprised of the steps of:
- protonating a quantity of chitosan to create protonated chitosan;
- mixing a quantity of graphene oxide with said protonated chitosan to create a solution;
- filling a molding structure with a quantity of said solution;
- evaporating said solution on a surface to create a membrane having a target thickness;
- and treating said membrane with a base having a pH greater than 10 or thermally;
- wherein said quantity of chitosan and said quantity of graphene have a ratio between 4:1 and 6:1.
Dependencies are inferred from the claim text.