ANIONIC EXCHANGE ELECTROLYTE POLYMER MEMBRANES

• US 20130338244A9
• Filed: 01/07/2011
• Published: 12/19/2013
• Est. Priority Date: 01/09/2010
• Status: Active Grant

• Current Assignee: Dais Analytic Corporation
• Original Assignee: Dais Analytic Corporation
• Inventors: Ehrenberg, Scott G., Tangredi, Timothy
• Granted Patent: US 9,393,557 B2
• Time in Patent Office: Days
• US Class Current: 521/27
• CPC Class Codes: B01J 41/00 Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties ion-exchange chromatography processes B01D15/36
• CPC Class Codes: C08J 2325/08 Copolymers of styrene C08J2329/08, C08J2335/06, C08J2355/02 take precedence
• CPC Class Codes: C08J 5/2243 obtained by introduction of active groups capable of ion-exchange into compounds of the type C08J5/2231
• CPC Class Codes: H01B 1/122 Ionic conductors
• CPC Class Codes: H01M 8/1067 characterised by their physical properties, e.g. porosity, ionic conductivity or thickness
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

The present disclosure provides a membrane having a first major surface and a second major surface and including one or more anionic exchange electrolyte polymers. The membranes can be useful for selectively mass transporting molecules and/or ions.

Claims

1. A membrane having a first major surface and a second major surface and comprising one or more anionic exchange electrolyte polymers;

wherein the one or more anionic exchange electrolyte polymers comprise at least a first contiguous domain and a second contiguous domain that are phase separated;

wherein the first contiguous domain comprises a plurality of repeat units having moieties with electrostatically bound negative ions and covalently bound positive ions;

wherein the second contiguous domain comprises a plurality of repeat units with non-charge bearing moieties; and

wherein at least a portion of the contiguous domains extend from the first major surface of the membrane to the second major surface of the membrane.

2. The membrane of claim 1 wherein the second contiguous domain forms an elastic matrix that supports the first contiguous domain.

3. The membrane of claim 1 wherein the second contiguous domain is plastic, rubbery, or semi-crystalline.

4. The membrane of claim 1 wherein the membrane forms a permeable barrier that selectively allows molecules and/or ions that are soluble in the first contiguous domain to pass between the first and second major surfaces of the membrane.

5. The membrane of claim 1 wherein the membrane forms a permeable barrier that selectively allows molecules that have large dipole moments or that can be dissolved in solvents that have large dipole moments to pass between the first and second major surfaces of the membrane.

6. The membrane of claim 5 wherein the solubility of the large dipole moment molecules in the first contiguous domain is greater than 10 times the solubility in the first contiguous domain of low dipole moment molecules that do not pass between the first and second major surfaces of the membrane.

7. The membrane of claim 1 wherein the membrane has high permittivity when exposed to DC or slowly varying AC voltages.

8. The membrane of claim 1 wherein the permittivity is at least 50.

9. The membrane of claim 1 wherein the permittivity is at least 1000.

10. The membrane of claim 1 wherein the permittivity is at least 10,000.

11. A method for selectively mass transporting molecules and/or ions, the method comprising:

providing a membrane according to claim 1 having molecules and/or ions in contact or in close proximity with the first major surface of the membrane; and

allowing the molecules and/or ions that are soluble in the first contiguous domain to pass between the first and second major surfaces of the membrane.