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US 11,918,959 B2Granted
Anion exchange polymers and anion exchange membranes incorporating same
AssigneeFfi Ionix IP, Inc.
InventorsBamdad Bahar, Chulsung Bae
Life of this patent
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Abstract
An anion exchange membrane is made by mixing 2 trifluoroMethyl Ketone [nominal] (1.12 g, 4.53 mmol), 1 BiPhenyl (0.70 g, 4.53 mmol), methylene chloride (3.0 mL), trifluoromethanesulfonic acid (TFSA) (3.0 mL) to produce a pre-polymer. The pre-polymer is then functionalized to produce an anion exchange polymer. The pre-polymer may be functionalized with trimethylamamine in solution with water. The pre-polymer may be imbibed into a porous scaffold material, such as expanded polytetrafluoroethylene to produce a composite anion exchange membrane.
Claims9
A composite anion exchange pre-polymer membrane comprising:
- a) a porous scaffold membrane comprising pores;
- b) an anion exchange pre-polymer which is a reaction product of
- i) 2 trifluoroMethyl Ketone;
- ii) 1 BiPhenyl;
- iii) methylene chloride;
- and
- iv) trifluoromethanesulfonic acid;
- wherein the anion exchange pre-polymer is within the pores of the porous scaffold membrane and forms surface layers on a first side and a second side, opposing said first side;
- wherein the anion exchange pre-polymer extends from a first side to a second and opposing side of the composite anion exchange membrane;
- wherein the porous scaffold has a thickness of no more than about 50 μm;
- and
- wherein the porous scaffold has an open area of at least 75%.
9 more elements
Dependencies are inferred from the claim text.