RHEOLOGY-CONTROLLED CONDUCTIVE MATERIALS, METHODS OF PRODUCTION AND USES THEREOF

• US 20090035707A1
• Filed: 08/01/2007
• Published: 02/05/2009
• Est. Priority Date: 08/01/2007
• Status: Abandoned Application

• Current Assignee: Gary L. Martin, James Guiheen, Yuan-Ping Ting, Yubing Wang
• Original Assignee: Gary L. Martin, James Guiheen, Yuan-Ping Ting, Yubing Wang
• Inventors: Guiheen, James, Martin, Gary L., Ting, Yuan-Ping, Wang, Yubing
• Application Number:
  US11/832,067
• Publication Number:
  US 20090035707A1
• Time in Patent Office: Days
• US Class Current: 430/322
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: C09D 11/52 Electrically conductive inks
• CPC Class Codes: C09D 5/24 Electrically-conducting paints conductive materials H01B1/00
• CPC Class Codes: H01B 1/22 the conductive material comprising metals or alloys
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon

Abstract

Compositions comprising at least one conductive nanomaterial and at least one rheology control additive are disclosed. These compositions can be used to form a film for uses requiring sufficient conductivity and light transparency. Methods of forming a conductive composition include: providing at least one conductive nanomaterial, providing at least one rheology control additive, and blending the at least one conductive nanomaterial and the at least one rheology control additive together to form the conductive composition. Methods of forming patterned transparent conductive coatings include: providing and applying a layer comprising at least one photosensitive or photoimageable composition to a surface, providing and applying a layer comprising at least one conductive nanomaterial and at least one rheology control additive, exposing and developing the layered material, and treating the layer comprising the at least one rheology control additive in order to remove at least part of the rheology control additive. Coating compositions, films, patterned films and structures containing these films and patterned films are also described.

Claims

1. A composition, comprising:

at least one conductive nanomaterial, and

at least one rheology control additive.

2. The composition of claim 1, wherein the at least one conductive nanomaterial comprises functionalized carbon nanotubes, unfunctionalized carbon nanotubes, semiconductor nanowires, semiconductor nanoparticles, metal nanowires, or a combination thereof.

3. The composition of claim 2, wherein the at least one conductive nanomaterial comprises a plurality of acid-functionalized carbon nanotubes.

4. The composition of claim 2, wherein the at least one conductive nanomaterial comprises a plurality of silver nanowires.

5. The composition of claim 1, comprising at least two different conductive nanomaterials.

6. The composition of claim 5, wherein the at least two different conductive nanomaterials comprise carbon nanotubes and silver nanowires.

7. The composition of claim 6, wherein the carbon nanotubes comprise acid-functionalized carbon nanotubes.

8. The composition of claim 1, wherein the at least one rheology control additive comprises at least one amine-acid adduct.

9. The composition of claim 8, wherein the at least one amine-acid adduct comprises carbamate chemistry.

10. The composition of claim 1, further comprising at least one solvent.

11. The composition of claim 10, wherein the at least one solvent comprises water.

12. The composition of claim 11, wherein the at least one solvent further comprises isopropyl alcohol.

13. The composition of claim 1, further comprising at least one photosensitive component.

14. The composition of claim 1, wherein the composition comprises no measurable amount of surfactant.

15. A film formed from the composition of claim 1.

16. The film of claim 15, wherein the film comprises an electrical sheet resistance of less than about 1E12 Ohm/square.

17. The film of claim 15, wherein the film has a percent light transmittance of at least 50%.

18. The film of claim 17, wherein the film has a percent light transmittance of at least 70%.

19. The film of claim 18, wherein the film has a percent light transmittance of at least 90%.

20. The film of claim 19, wherein the film is a transparent conductor.

21. An optoelectronic or electronic device comprising the film of claim 20.

22. The film of claim 15, wherein the film is patterned.

23. A conductive element comprising the film of claim 15.

24. A conductive element comprising the patterned film of claim 22.

25. A method of forming a conductive composition, comprising:

providing at least one conductive nanomaterial,

providing at least one rheology control additive, and

blending the at least one conductive nanomaterial and the at least one rheology control additive together to form the conductive composition.

26. The method of claim 25, further comprising:

providing at least one solvent, and

blending the at least one solvent with the at least one conductive nanomaterial and the at least one rheology control additive to form the conductive composition.

27. The method of claim 26, wherein the at least one solvent comprises water, isopropyl alcohol or a combination thereof.

28. The method of claim 25, wherein the at least one rheology control additive comprises an amine-acid adduct.

29. A method of forming a patterned transparent conductive coating, comprising:

providing and applying a layer comprising at least one photosensitive or photoimageable composition to a surface,

providing and applying a layer comprising at least one conductive nanomaterial and at least one rheology control additive,

exposing and developing the layered material, and

treating the layer comprising the at least one rheology control additive in order to remove at least part of the rheology control additive.

30. The method of claim 29, wherein the layer comprising at least one conductive nanomaterial and at least one rheology control additive is applied to the surface before the layer comprising at least one photosensitive or photoimageable composition.

31. The method of claim 30, wherein the at least one photosensitive or photoimageable composition, the at least one conductive nanomaterial and the at least one rheology control additive are in a single coating material.