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US 12,612,496 B2Granted
Composite ion exchange membrane and method of making same
OwnerBamdad Bahar, Zhefei Liinventors
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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.
Claims15
A composite ion exchange membrane comprising:
- a) a porous scaffold material having pores;
- b) a pre-polymer comprising:
- i) 2 trifluoromethyl ketone;
- ii) 1 biphenyl;
- iii) methylene chloride;
- and
- iv) trifluoromethanesulfonic acid,
- wherein the pre-polymer is configured in the pores of the porous scaffold material;
- c) a functional polymer bonded with the pre-polymer;
- d) trimethylamine;
- and
- wherein said functional polymer is functionalized with said trimethylamine to produce said composite ion exchange membrane having quaternized ammonium hydroxide functional groups.
9 more elements
Dependencies are inferred from the claim text.