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AssigneeCORE Energy Recovery Solutions Inc.
InventorsRyan Nicholas HUIZING, Hao CHEN, Frankie Kin Bong WONG
Estimating the term…
Water vapor transport membranes for ERV and other water vapor transport applications are provided. The membranes include a substrate and an air impermeable selective layer coated on the substrate, the selective layer including a cellulose derivative and a sulfonated polyaryletherketone. In some embodiments the sulfonated polyaryletherketone is in a cation form and/or the selective layer includes sPEEK and CA in an sPEEK:CA (wt.:wt.) ratio in the range of about 7:3 to 2:3. Methods for making such membranes are provided. The methods include applying a coating solution/dispersion to a substrate and allowing the coating solution/dispersion to dry to form an air impermeable selective layer on the substrate, the coating solution/dispersion including a cellulose derivative and a sulfonated polyarylether ketone. In some embodiments the sulfonated polyaryletherketone is in a cation form and/or the coating solution/dispersion includes sPEEK and CA in an sPEEK:CA (wt.:wt.) ratio in the range of about 7:3 to 2:3.
A water vapor transport membrane comprising a microporous substrate and an air impermeable selective layer coated on a first surface of the substrate, wherein the selective layer has a thickness of less than about 5 microns and wherein the selective layer comprises at least one cellulose derivative and at least one sulfonated polyaryletherketone.
A water vapor transport membrane comprising a microporous substrate and an air impermeable selective layer coated on a first surface of the substrate, wherein the selective layer comprises a polymer blend comprising a first polymer and a second polymer, wherein the first polymer has lower water vapor permeability and is less water swellable than the second polymer, and wherein a weight-to-weight ratio of the first and second polymers in the selective layer is selected such that there is a level of phase separation in the selective layer that causes swelling of the second polymer, upon exposure of the water vapor transport membrane to moisture, to be constrained by the first polymer.
A method for making a water vapor transport membrane, the method comprising:
Dependencies are inferred from the claim text.