Anion exchange membranes and polymers for use in same

Patent metadata

Field	Value
Publication number	US-10272424-B2
Application number	US-201515326538-A
Country	US
Kind code	B2
Filing date	Jul 22, 2015
Priority date	Jul 22, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

Embodiments of the invention relate generally to anion exchange membranes and, more particularly, to anion exchange membranes comprising a styrene block copolymer and methods for their manufacture. In one embodiment, the invention provides a polymer according to formula IV, wherein x and y are mo 1 %, QA is or each of R 1 and R 2 is, independently, a linear alkyl chain or a cyclic alkyl chain, and Z is selected from a group consisting of: a linear alkyl chain, a cyclic alkyl chain, and an alkylene ether chain.

First claim

What is claimed is:

1. A polymer according to formula IX

wherein x and y are mol % and n is 1-10.

2. A method of preparing the polymer of claim 1 , the method comprising:
immersing a polymer of formula VIII in aqueous trimethylamine;
heating the mixture to approximately 50 ° C.;
rinsing the polymer with water; and
immersing the resulting polymer in sodium hydroxide

wherein x and y are mol % and n is 1-10.

3. The method of claim 2 , further comprising:
forming the polymer of formula VIII by:
mixing a polymer of formula VII with an alcohol of formula 3

adding to the mixture a quantity of anhydrous dichloromethane;
cooling the mixture;
adding to the mixture a quantity of trifluoromethanesulfonic acid; and
precipitating the polymer of formula VIII in methanol,

wherein x and y are mol % and n is 1-10.

4. A fuel cell alkaline exchange membrane, a fuel cell ionomer, an electrolysis alkaline exchange membrane, or an actuator comprising:
a polymer of formula IX

wherein x and y are mol % and n is 1-10

5. The fuel cell alkaline exchange membrane, fuel cell ionomer, electrolysis alkaline exchange membrane, or actuator of claim 4 , further comprising:
at least one additional polymer selected from a group consisting of:
a polymer of formula IV

wherein x and y are mol %, QA is

each of R 2 and R 2 is, independently, a linear alkyl chain or a cyclic alkyl chain, and Z is selected from a group consisting of: a linear alkyl chain, a cyclic alkyl chain, and an alkylene ether chain; and
a polymer of formula XII

wherein x and y are mol % and n is 1-10.

6. The fuel cell alkaline exchange membrane, fuel cell ionomer, electrolysis alkaline exchange membrane, or actuator of claim 5 , wherein the at least one additional polymer includes a polymer of formula IV.

7. A fuel cell ionomer according to claim 4 .

8. An electrolysis alkaline exchange membrane according to claim 4 .

9. An actuator according to claim 4 .

10. A fuel cell alkaline exchange membrane according to claim 4 .

11. The fuel cell alkaline exchange membrane, fuel cell ionomer, electrolysis alkaline exchange membrane, or actuator of claim 5 , wherein the at least one additional polymer includes a polymer of formula XII.

12. A fuel cell ionomer according to claim 5 .

13. An electrolysis alkaline exchange membrane according to claim 5 .

14. An actuator according to claim 5 .

Assignees

• Rensselaer Polytech Inst

Inventors

• Bae Chulsung
• Mohanty Angela Dee

Classifications

• C08J5/2243

  obtained by introduction of active groups capable of ion-exchange into compounds of the type C08J5/2231 · CPC title

• C08F2810/50

  wherein the polymer is a copolymer and the modification is taking place only on one or more of the monomers present in minority · CPC title

• C08F2800/10

  as molar percentages · CPC title

• C08F8/18

  Introducing halogen atoms or halogen-containing groups · CPC title

• C08F8/30

  Introducing nitrogen atoms or nitrogen-containing groups · CPC title