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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 s PEEK and CA in an s PEEK: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 s PEEK 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 to form a substantially non-porous film thereupon, the selective layer comprising sulfonated polyether ether ketone (sPEEK) and cellulose acetate (CA) in an sPEEK:CA (wt.:wt.) ratio in the ramie of about 7:3 to about 2:3, wherein the acetyl content of the CA is in the range of about 20% to about 62%, the degree of sulfonation of the sPEEK is in the ramie of about 23% to about 100%, and the selective layer has a thickness of less than about 5 microns, wherein the sPEEK comprises sPEEK in a cation form.
A method for making a water vapor transport membrane, the method comprising:
An energy recovery ventilation (ERV) core comprising a pleated membrane cartridge, the membrane cartridge comprising alternating layers of water vapor transport membranes comprising a microporous substrate and an air impermeable selective layer coated on a first surface of the substrate to form a substantially non-porous film thereupon, the selective layer comprising sulfonated polyether ether ketone (sPEEK) and cellulose acetate (CA) in an sPEEK:CA (wt.:wt.) ratio in the range of about 7:3 to about 2:3, wherein the acetyl content of the CA is in the range of about 20% to about 62%, the degree of sulfonation of the sPEEK is in the range of about 23% to about 100%, and the selective layer has a thickness of less than about 5 microns, with gas flow pathways in between adjacent membrane layers.
An energy recovery ventilation (ERV) system comprising an ERV core, the ERV core comprising a pleated membrane cartridge, wherein the membrane cartridge comprises alternating layers of water vapor transport membranes comprising a microporous substrate and an air impermeable selective layer coated on a first surface of the substrate to form a substantially non-porous film thereupon, the selective layer comprising sulfonated polyether ether ketone (sPEEK) and cellulose acetate (CA) in an sPEEK:CA (wt.:wt.) ratio in the range of about 7:3 to about 2:3, wherein the acetyl content of the CA is in the range of about 20% to about 62%, the degree of sulfonation of the sPEEK is in the range of about 23% to about 100%, and the selective layer has a thickness of less than about 5 microns, with gas flow pathways in between adjacent membrane layers.
Dependencies are inferred from the claim text.