Back to results
US 10,315,155 B2Granted
Highly porous fibrous network materials for gas filtration
AssigneeThe Research Foundation for The State University of New York
InventorsBenjamin Chu, Benjamin S. Hsiao, Hongyang Ma
Life of this patent
Estimating the term…
Abstract
Membranes are provided for filtering a gas, in some cases air. Membranes using a highly porous cellulose nano fibrous barrier layer with a highly porous (surface-charged) substrate can exhibit high flux, high retention, and low pressure drop in air filtration of toxic aromatic gases, fumes, bacteria, viruses, dusts, and particulate matters.
Claims22
A membrane comprising:
- at least a first substrate layer including a polyolefin modified with at least one ionic compound;
- and
- at least a second layer including a three-dimensional network comprising a material selected from the group consisting of polysaccharide nanofibers, cellulose nanofibers, chitin nanofibers, chitosan nanofibers, polysaccharide nanofibrils, polysaccharide nanostrips, cellulose nanostrips, carbon nanofibers, carbon nanotubes, porous graphene nanosheets, porous graphene oxide nanosheets, bacterial cellulose, and combinations thereof.
A method of producing a filtration membrane comprising:
- contacting a porous substrate, including polyolefin with at least one ionic compound, to form a substrate;
- and
- applying to the substrate a three-dimensional network including a material selected from the group consisting of polysaccharide nanofibers, cellulose nanofibers, chitin nanofibers, chitosan nanofibers, polysaccharide nanofibrils, polysaccharide nanostrips, cellulose nanostrips, carbon nanofibers, carbon nanotubes, porous graphene nanosheets, porous graphene oxide nanosheets, bacterial cellulose, and combinations thereof, to form the filtration membrane.
Dependencies are inferred from the claim text.