Poly(ionic liquid)s composite for absorption and separation
AssigneeW. L. Gore & Associates, Inc.
InventorsShaofeng Ran, Gregory J. Shafer
Life of this patent
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Abstract
Provided herein are composite materials having an expanded porous membrane and a poly(ionic liquids)(PILs) which exhibit superior performance properties including high CO2 absorption, CO2 permeability and CO2/N2 selectivity in combination with desirable mechanical properties such as being thin, strong, moisture and temperature resistant, and having flexibility, strength, and durability, laminates and articles including the composites, and processes for manufacture of the composites.
Claims24
A composite material comprising:
- an expanded porous membrane having a thickness, where the expanded porous membrane has a microstructure of fibrils, and optionally nodes interconnecting the fibrils, and a void volume providing pores;
- and a poly(ionic liquid)s polymer (PILs), wherein the PILs is selected from the group consisting of poly (diallyldimethylammonium) bis(trifluoromethane)sulfonimide(PDDMATFSI), poly (diallyldimethylammonium) chloride(PDDMACI), poly (diallyldimethylammonium) tetrafluoroborate(PDDMABF4), poly ((vinylbenzyl) trimethylammonium) bis(trifluoromethane)sulfonimide(PVBTMATFSI), poly ((vinylbenzyl) trimethylammonium) chloride, (PVBTMACI), poly ((vinylbenzyl) trimethylammonium) tetrafluoroborate (PVBTMABF4), and poly ((vinylbenzyl) trimethylammonium) acetate(PVBTMAOAc).
-5. (canceled)
-9. (canceled)
(canceled)
-21. (canceled)
A method of forming a composite material, the method comprising:
- (a) dissolving a solid poly(ionic liquid)s polymer in a solvent to form a poly(ionic liquid)s polymer solution;
- (b) applying the poly(ionic liquid)s polymer solution to a porous polymer membrane having a void volume providing pores and a microstructure of nodes interconnected by fibrils or only fibrils;
- and
- (c) removing the solvent after applying the poly(ionic liquid)s polymer solution to the porous polymer membrane, and
- (d) expanding the composite material after step (b) and/or after step (c) wherein the poly(ionic liquid)s polymer is partially or fully imbibed into the void volume of the microstructure of the porous polymer membrane.
-28. (canceled)
A method to form a composite material comprising:
- (a) providing
- (i) a poly(ionic liquid)s polymer solution;
- and
- (ii) an expanded porous membrane having a first side and a second side;
- where the expanded porous membrane has a void volume providing pores and a microstructure of fibrils, and optionally nodes interconnecting the fibrils;
- and
- (b) depositing the poly(ionic liquid)s polymer solution on at least one side of the expanded porous membrane whereby the composite material is formed;
- (c) optionally subjecting the composite material of step (b) to one or more steps of heating, stretching, compacting or any combination thereof.
Dependencies are inferred from the claim text.