Biocompatible membranes and fuel cells produced therewith

• US 20030031911A1
• Filed: 08/07/2002
• Published: 02/13/2003
• Est. Priority Date: 04/13/2001
• Status: Abandoned Application

• Current Assignee: Powerzyme
• Original Assignee: Powerzyme
• Inventors: Sun, Hoi-Cheong Steve, Ritts, Rosalyn
• Application Number:
  US10/213,530
• Publication Number:
  US 20030031911A1
• Time in Patent Office: Days
• US Class Current: 429/33
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 5/00 Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery
• CPC Class Codes: H01M 4/9008 Organic or organo-metallic compounds
• CPC Class Codes: H01M 8/04089 of gaseous reactants
• CPC Class Codes: H01M 8/0662 Treatment of gaseous reactants or gaseous residues, e.g. cleaning
• CPC Class Codes: H01M 8/1009 with one of the reactants being liquid, solid or liquid-charged H01M8/12 takes precedence
• CPC Class Codes: H01M 8/1011 Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC]
• CPC Class Codes: H01M 8/1016 characterised by the electrolyte material H01M8/12 takes precedence
• CPC Class Codes: H01M 8/103 having nitrogen, e.g. sulfonated polybenzimidazoles [S-PBI], polybenzimidazoles with phosphoric acid, sulfonated polyamides [S-PA] or sulfonated polyphosphazenes [S-PPh]
• CPC Class Codes: H01M 8/1051 Non-ion-conducting additives, e.g. stabilisers, SiO2 or ZrO2
• CPC Class Codes: H01M 8/16 Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

The present invention relates to a biocompatible membrane, solutions useful for producing biocompatible membranes and fuel cells in which compatible membranes in accordance with the invention may be used. The biocompatible membranes are produced from a synthetic polymer material which can include a polymer, copolymer or block copolymer with the proviso that when a synthetic copolymer material includes at least one block copolymer it also includes at least one polymer or copolymer. The membranes also include a polypeptide.

Claims

1. A biocompatible membrane comprising:

at least one layer of a synthetic polymer material having a first side and a second side and at least one polypeptide associated therewith, said polypeptide capable of participating in a chemical reaction, participating in the transporting of molecules, atoms, protons or electrons from said first side of said at least one layer to said second side of said at least one layer, or participating in the formation of molecular structures that facilitate such reactions or transport, and wherein said synthetic polymer material includes at least one polymer, copolymer or block copolymer with the proviso that when said synthetic copolymer material includes at least one block copolymer, said synthetic polymer material also includes at least one polymer, or copolymer.

2. The biocompatible membrane of claim 1 wherein said at least one polypeptide can participate in transporting protons from said first side of said at least one layer to said second side of said at least one layer.

3. The biocompatible membrane of claim 2 wherein said at least one polypeptide can participate in transporting protons from said first side of said at least one layer to said second side of said at least one layer and can facilitate the passage of current across said layer to a degree at least greater than that which would using an identical biocompatible membrane without said polypeptide.

4. The biocompatible membrane of claim 3 wherein said at least one polypeptide can participate in transporting protons from said first side of said at least one layer to said second side of said at least one layer so as to be capable of providing at least about 10 picoamps/cm² of current density.

5. The biocompatible membrane of claim 4 wherein said at least one polypeptide can participate in transporting protons from said first side of said at least one layer to said second side of said at least one layer so as to be capable of providing at least about 10 milliamps/cm² of current density.

6. The biocompatible membrane of claim 1 wherein said at least one polypeptide is embedded in said at least one layer.

7. The biocompatible membrane of claim 1 wherein said at least one polypeptide is present in an amount of at least about 0.01% by weight of said biocompatible membrane.

8. The biocompatible membrane of claim 7 wherein said at least one polypeptide is present in an amount of at least about 5% by weight of said biocompatible membrane.

9. The biocompatible membrane of claim 8 wherein said at least one polypeptide is present in an amount of at least about 10% by weight of said biocompatible membrane.

10. The biocompatible membrane of claim 1 wherein said synthetic polymer material includes at least one block copolymer which has a hydrophobic content that exceeds its hydrophilic content.

11. The biocompatible membrane of claim 10 wherein said at least one block copolymer has at least one block having an average molecular weight of between about 1,000 and 20,000 daltons.

12. The biocompatible membrane of claim 11 wherein said at least one block copolymer has at least a second block having an average molecular weight of between about 1,000 and 20,000 daltons.

13. The biocompatible membrane of claim 1 wherein said at least one block copolymer is provided in an amount of at least about 35% by weight based on weight of said biocompatible membrane.

14. The biocompatible membrane of claim 13 wherein said at least one block copolymer is provided in an amount of about 35% to about 99% by weight based on weight of said biocompatible membrane.

15. The biocompatible membrane of claim 1, wherein said synthetic polymer material is a mixture of a plurality of block copolymers.

16. The biocompatible membrane of claim 1 wherein said at least one polypeptide can participate in a redox reaction.

17. The biocompatible membrane of claim 1 wherein said at least one polypeptide has the ability to participate in a redox reaction or the transporting of molecules, atoms, protons or electrons from said first side of said at least one layer to said second side of said at least one layer.

18. The biocompatible membrane of claim 1 wherein said at least one polypeptide has both the ability to participate in a redox reaction and the transporting of molecules, atoms, protons or electrons from said first side of said at least one layer to said second side of said at least one layer.

19. The biocompatible membrane of claim 1 wherein said at least at least one polymer or copolymer have a molecular weight of between about 5,000 and about 500,000.

20. A biocompatible membrane comprising:

at least one layer of a synthetic polymer material having a first side and a second side, said synthetic polymer material being present in an amount of at least about 5% by weight based on weight of the finished membrane and at least one polypeptide embedded therein and being present in an amount of at least about 10% by weight of said biocompatible membrane, said polypeptide having the ability to participate in a redox reaction or in the transporting of protons from said first side of said at least one layer to said second side of said at least one layer and being capable of providing at least about 10 milliamps/cm² of current density, and wherein said synthetic polymer material includes at least one polymer, copolymer or block copolymer with the proviso that when said synthetic copolymer material includes at least one block copolymer, said synthetic polymer material also includes at least one polymer, or copolymer.

21. A fuel cell comprising:

an anode compartment including an anode;

a cathode compartment including a cathode; and

disposed within said anode compartment, within said cathode compartment, or between said anode compartment and said cathode compartment, at least one biocompatible membrane having at least one layer of a synthetic polymer material which includes an anode side and a cathode side and at least one polypeptide associated therewith, said polypeptide capable of participating in a chemical reaction, participating in the transporting of protons from said anode side of said at least one layer to said cathode side of said at least one layer or participating in the formation of molecular structures that facilitate such reactions or transport, and wherein said synthetic polymer material includes at least one polymer, copolymer or block copolymer with the proviso that when said synthetic copolymer material includes at least one block copolymer, said synthetic polymer material also includes at least one polymer, or copolymer.

22. The fuel cell of claim 21 wherein, when said anode and said cathode are placed into electrical contact though a circuit, 10 milliwatts/cm² are generated

23. The fuel cell of claim 22 wherein, when said anode and said cathode are placed into electrical contact though a circuit, 50 milliwatts/cm² are generated.

24. The fuel cell of claim 23 wherein, when said anode and said cathode are placed into electrical contact though a circuit, 100 milliwatts/cm² are generated.

25. The fuel cell of claim 21, further comprising:

at least one electron carrier within said anode compartment.

26. The fuel cell of claim 21, further comprising:

at least one second polypeptide within said anode compartment capable of liberating protons or electrons from an electron carrier.

27. The fuel cell of claim 21, further comprising:

at least one transfer mediator within said anode compartment capable of transferring electrons to said anode.

28. The fuel cell of claim 21, wherein said at least one biocompatible membrane is disposed between said anode and said cathode.

29. The fuel cell of claim 21, further comprising:

a dielectric material disposed between said biocompatible membrane and said cathode that will permit the flow of protons from said anode compartment to said cathode compartment.

30. The fuel cell of claim 21, further comprising a first electron transfer mediator disposed in said anode compartment is capable of receiving at least one electron from an electron carrier disposed in said anode compartment and transferring said at least one electron to a second electron carrier, a second electron transfer mediator or said anode.

31. The fuel cell of claim 21, further comprising at least one fuel disposed within said anode compartment.

32. The fuel cell of claim 31, wherein said fuel is an organic compound.

33. The fuel cell of claim 21, wherein said polypeptide has the ability to participate in a redox reaction or in the transporting of protons from said anode side of said at least one layer to said cathode side of said at least one layer.

34. The fuel cell of claim 21, wherein said polypeptide has the ability to participate in a redox reaction and in the transporting of protons from said anode side of said at least one layer to said cathode side of said at least one layer.

35. A solution useful for producing a biocompatible membrane comprising:

at least one synthetic polymer material including at least one polymer, copolymer or block copolymer with the proviso that when said synthetic copolymer material includes at least one block copolymer, said synthetic polymer material also includes at least one polymer, or copolymer, said synthetic polymer material being present in an amount of between about 1 and about 30% w/v, at least one polypeptide, in an amount of between at least about 0.001 and about 10.0% w/v and said polypeptide capable of participating in a chemical reaction, participating in the transporting molecules, atoms, protons or electrons or participating in the formation of molecular structures that facilitate such reactions or transport, in a solvent system including both organic solvents and water.

36. The solution of claim 35 further comprising:

at least one detergent in an amount of between about 0.01 and about 1.0% v/v.

37. The solution of claim 35, wherein said at least one polypeptide has both the ability to participate in a redox reaction or the transporting of protons.

38. The solution of claim 35, wherein said at least one polypeptide has both the ability to participate in a redox reaction and the transporting of protons.

39. The solution of claim 35, wherein said at least one polypeptide has the ability to participate in transporting of protons.

40. The solution of claim 35, wherein said synthetic polymer material is a mixture of a plurality of block copolymers.