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US 11,173,456 B2Granted
Anion exchange polymers and anion exchange membranes incorporating same
AssigneeXergy 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 trimethylamine 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.
Claims3
A method of making a composite anion exchange membrane comprising the steps of:
- a) mixing the following components:
- i) 2 trifluoromethyl ketone;
- ii) 1 biphenyl;
- iii) methylene chloride;
- and
- iv) trifluoromethanesulfonic acid,
- for a mixing time and temperature to produce a pre-polymer,
- b) providing a porous scaffold;
- c) dissolving the pre-polymer in an imbibing solution comprising methanol to produce a solution of the pre-polymer;
- and
- d) combining the pre-polymer solution and the porous scaffold by imbibing and subsequently functionalizing the pre-polymer;
- and
- e) drying the functionalized pre-polymer solution to produce a composite anion exchange membrane.
10 more elements
Dependencies are inferred from the claim text.