Cellulose-containing filtration materials and methods of making the same
AssigneeAlliance for Sustainable Energy, LLC
InventorsPeter N. CIESIELSKI, Michael E. HIMMEL, Todd Brian VINZANT
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Abstract
The present disclosure relates to a composition that includes a base layer having an outer surface and a first thickness and a material that includes a plurality of cellulose nanofibers in physical contact with the outer surface, where the composition has an average filtration efficiency of less than or equal to 90% for particles having a characteristic length between about 50 nm and about 100 μm and the composition is characterized by an average inhalation resistance of less than or equal to 35 mm H2O as measured across the first thickness and the material.
Claims20
A composition comprising:
- a base layer having an outer surface and a first thickness;
- and
- a material comprising a plurality of cellulose nanofibers in physical contact with the outer surface, wherein:
- the composition has an average filtration efficiency of less than or equal to 90% for particles having a characteristic length between about 50 nm and about 100 μm, and
- the composition is characterized by an average inhalation resistance of less than or equal to 35 mm H2O as measured across the first thickness and the material.
A method comprising:
- preparing a slurry comprising cellulose nanofibers in a liquid;
- depositing the slurry onto a base layer, resulting in a coating of the slurry on a first surface of the base layer;
- and
- removing at least a portion of the liquid, resulting in the forming solid cellulose nanofibers on and in the base layer.
A filter media comprising:
- a composition comprising:
- a base layer having an outer surface and a first thickness;
- and
- a material comprising a plurality of cellulose nanofibers in physical contact with the outer surface, wherein:
- the composition has an average filtration efficiency of less than or equal to 90% for particles having a characteristic length between about 50 nm and about 100 μm, and
- the composition is characterized by an average inhalation resistance of less than or equal to 35 mm H2O as measured across the first thickness and the material.
Dependencies are inferred from the claim text.