Anion exchange polymers and anion exchange membranes incorporating same

Patent metadata

Field	Value
Publication number	US-2017252707-A1
Application number	US-201715448734-A
Country	US
Kind code	A1
Filing date	Mar 3, 2017
Priority date	Mar 3, 2016
Publication date	Sep 7, 2017
Grant date	—

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.

First claim

What is claimed is:

1 . A method of making an anion exchange polymer comprisinghe 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) functionalizing the pre-polymer to produce an anion exchange polymer.

2 . The method of making an anion exchange polymer of claim 1 , further comprising the steps of:
a) dissolving the pre-polymer in methanol to produce a polymer solution; and b) drying the polymer solution

3 . The method of making an anion exchange polymer of claim 1 , wherein the step of functionalizing comprises exposing the pre-polymer to trimethylamamine in a solution with water.

4 . A method of making an anion exchange membrane of claim 1 , comprising the steps of:
a) providing a porous scaffold; and b) combining the pre-polymer with the scaffold and subsequently functionalizing the pre-polymer to produce an anion-exchange membrane.

5 . The method of making an anion exchange membrane of claim 4 ; wherein the porous scaffold is an expanded polytetrafluoroethylene membrane.

6 . The method of making an anion exchange membrane of claim 4 , wherein the pre-polymer is combined with the porous scaffold by imbibing.

7 . The method of making an anion exchange membrane of claim 6 , comprising the steps of:
a) dissolving the pre-polymer in an imbibing solution comprising methanol to produce a polymer solution; b) imbibing the polymer solution in the porous scaffold; and c) drying the polymer solution to produce a composite anion exchange membrane.

8 . The method of making an anion exchange membrane of claim 7 wherein the step of functionalizing the pre-polymer to produce an anion exchange polymer is performed before the polymer solution is dried.

9 . An anion exchange polymer membrane comprising:
a) 2 trifluoroMethyl Ketone; b) 1 &Phenyl; c) methylene chloride; and d) trifluoromethanesulfonic acid,

10 . The anion exchange membrane of claim 9 , further comprising a functional group comprising trimethylamamine.

11 . The anion exchange membrane of claim 9 ; further comprising:
a) a porous scaffold material comprising a porous structure; wherein the anion exchange polymer is within the porous structure.

12 . The anion exchange membrane of claim 11 , wherein the porous scaffold material is an expanded polytetrafluoroethylene membrane.

Assignees

• Xergy Inc

Inventors

• Bahar Bamdad
• Bae Chulsung

Classifications

• C08G2261/72

  Derivatisation · CPC title

• C08G2261/146

  Side-chains containing halogens · CPC title

• H01M8/1062

  characterised by the physical properties of the porous support, e.g. its porosity or thickness · CPC title

• B01J41/08 Primary

  Use of material as anion exchangers; Treatment of material for improving the anion exchange properties · CPC title

• C08G10/00

  Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or halogenated aromatic hydrocarbons only · CPC title