Anion-conducting polymer

Patent metadata

Field	Value
Publication number	US-9315630-B2
Application number	US-201314385115-A
Country	US
Kind code	B2
Filing date	Apr 4, 2013
Priority date	Apr 4, 2012
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

Disclosed herein are anion-conducting polymers that comprise a cationic benzimidazolium and imidazolium moieties. Methods of forming the polymers and membranes comprising the polymers are also provided.

First claim

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A polymer comprising one or more repeating units, wherein at least one of the repeating units comprises one or more benzimidazolium-containing moieties having Formula (I-A):

wherein:
R 1 is independently selected from the group consisting of alkyl, perfluoroalkyl, heteroalkyl, alkoxy, perfluoroalkoxy, aryl, heteroaryl group and a polymer;
R 2 is alkyl;
R 2 ′, at each occurrence, is independently selected from the group consisting of hydrogen, and a polymer;
R 3 is independently selected from the group consisting of alkyl, perfluoroalkyl, heteroalkyl, aryl, aralkyl, and a polymer; and
R 5 is independently selected from the group consisting of hydrogen, and a polymer;
wherein at least one of R 1 , R 2 ′, R 3 , and R 5 is a polymer.

2. The polymer of claim 1 , wherein the polymer is a salt formed with an anion selected from the group consisting of iodide, hydroxide, chloride, bromide, fluoride, cyanide, acetate, carbonate, nitrate, sulfate, phosphate, triflate, and tosylate.

3. The polymer of claim 1 , wherein the benzimidazolium-containing moiety is included in a main chain of the polymer.

4. The polymer of claim 1 , wherein the benzimidazolium-containing moiety is included in a pendant group of the polymer.

5. The polymer of claim 1 , wherein the benzimidazolium-containing moiety is part of a crosslink of the polymer.

6. An ionic membrane comprising a cationic polymer of claim 1 .

7. The ionic membrane of claim 6 , further comprising an anionic polymer.

8. The ionic membrane of claim 7 , wherein the cationic polymer is ionically bound to the anionic polymer.

9. The ionic membrane of claim 6 , further comprising an acidic polymer.

10. The ionic membrane of claim 9 , wherein the acidic polymer comprises a benzimidazole-containing moiety.

11. The ionic membrane of claim 9 , wherein the cationic polymer is bound to an anionic polymer created in situ after the deprotonation of the acidic polymer.

12. The polymer of claim 1 , wherein R 1 is independently selected from the group consisting of methyl and trifluoromethyl.

13. The polymer of claim 1 , wherein R 3 is independently selected from the group consisting of methyl and trifluoromethyl.

14. The polymer of claim 1 , wherein R 2 is methyl.

Assignees

• Univ Fraser Simon

Inventors

• Thomas Owen
• Holdcroft Steven
• Wright Andrew

Classifications

• B01D71/62

  Polycondensates having nitrogen-containing heterocyclic rings in the main chain · CPC title

• C08G73/18 Primary

  Polybenzimidazoles · CPC title

• C08J2379/04

  Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors · CPC title

• C08J5/2256

  based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon bonds, e.g. obtained by polycondensation · CPC title

• B01J41/14

  obtained by reactions only involving unsaturated carbon-to-carbon bonds · CPC title