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US 12,589,360 B2Granted
Hydrophilic membrane separation layer
AssigneeNitto Denko Corporation
InventorsBita Bagge, Robb Bagge, Shijun Zheng, Weiping Lin, Peng Wang
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Abstract
Described herein are gas separation membranes that provide improved compatibility between the gutter layer and the porous support and/or the separation layer for gases. Such composite membranes have a high water/air selectivity in permeability.
Claims12
A gas separation membrane comprising:
- a porous substrate;
- an intermediate gutter layer, wherein the intermediate gutter layer comprises a hydrophilic polymer and a crosslinker;
- a gas separation layer, wherein the gas separation layer comprises at least one ionic liquid and a polymer;
- and wherein the intermediate gutter layer is positioned between the porous substrate and the gas separation layer;
- wherein the hydrophilic polymer of the intermediate gutter layer comprises polyurethane.
2 more elements
A gas separation membrane comprising:
- a porous substrate;
- an intermediate gutter layer, wherein the intermediate gutter layer comprises a hydrophilic polymer and a crosslinker;
- a gas separation layer, wherein the gas separation layer comprises at least one ionic liquid and a polymer;
- wherein the intermediate gutter layer is positioned between the porous substrate and the gas separation layer;
- and
- wherein the crosslinker of the intermediate gutter layer comprises a polyfunctional aziridine liquid crosslinker.
3 more elements
A gas separation membrane comprising:
- a porous substrate;
- an intermediate gutter layer, wherein the intermediate gutter layer comprises a hydrophilic polymer and a crosslinker;
- a gas separation layer, wherein the gas separation layer comprises at least one ionic liquid and a polymer;
- wherein the intermediate gutter layer is positioned between the porous substrate and the gas separation layer;
- and
- wherein the intermediate gutter layer comprises about 97 wt % polyurethane and about 3 wt % polyfunctional aziridine liquid crosslinker.
3 more elements
Dependencies are inferred from the claim text.