CNT-INFUSED GLASS FIBER MATERIALS AND PROCESS THEREFOR

• US 20100279569A1
• Filed: 11/02/2009
• Published: 11/04/2010
• Est. Priority Date: 01/03/2007
• Status: Abandoned Application

• Current Assignee: Applied NanoStructured Solutions, LLC (Cabot Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: SHAH, Tushar K., Malecki, Harry C., Alberding, Mark R., Gardner, Slade H.
• Application Number:
  US12/611,070
• Publication Number:
  US 20100279569A1
• Time in Patent Office: Days
• US Class Current: 442/180
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 32/15 Nano-sized carbon materials
• CPC Class Codes: C01B 32/164 involving continuous processes
• CPC Class Codes: C03C 25/12 General methods of coating; Devices therefor
• CPC Class Codes: C03C 25/465 Coatings containing composite materials
• CPC Class Codes: C22C 49/06 Aluminium
• CPC Class Codes: C22C 49/14 characterised by the fibres or filaments
• CPC Class Codes: Y10T 442/2992 Coated or impregnated glass fiber fabric

Abstract

A composition includes a carbon nanotube (CNT)-infused glass fiber material, which includes a glass fiber material of spoolable dimensions and carbon nanotubes (CNTs) bonded to it. The CNTs are uniform in length and distribution. A continuous CNT infusion process includes: (a) disposing a carbon-nanotube forming catalyst on a surface of a glass fiber material of spoolable dimensions; and (b) synthesizing carbon nanotubes on the glass fiber material, thereby forming a carbon nanotube-infused glass fiber material. The continuous CNT infusion process optionally includes extruding a glass fiber material from a glass melt or removing sizing material from a pre-fabricated glass fiber material.

Claims

1. A composition comprising a carbon nanotube (CNT)-infused glass fiber material, wherein said CNT-infused glass fiber material comprises a glass fiber material of spoolable dimensions and carbon nanotubes (CNTs) bonded to said glass fiber material, wherein said CNTs are uniform in length and uniform in distribution.

2. The composition of claim 1, wherein said bonding to said glass fiber material comprises a bonding motif selected from direct bonding of said CNTs to the glass fiber material;

indirect bonding via a transition metal nanoparticle catalyst disposed between said CNTs and said glass fiber material; and

mixtures thereof.

3. The composition of claim 1, where said CNTs have a length of about 1 micron to about 500 microns.

4. The composition of claim 1, wherein said CNTs have a length from about 1 micron to about 10 microns.

5. The composition of claim 1, wherein said CNTs have a length from about 20 microns to about 100 microns.

6. The composition of claim 1, wherein said CNTs have a length from about 100 microns to about 500 microns.

7. The composition of claim 1, wherein said uniformity of distribution is characterized by a density up to about 15,000 nanotubes/micron squared.

8. The composition of claim 1, wherein said glass fiber material is selected from a glass filament, an optical fiber, a glass strand (tow), a glass yarn, a glass tape, a unidirectional glass tape, a glass fiber-braid, a glass roving, a glass roving fabric, a non-woven glass fiber mat, and a glass fiber ply.

9. The composition of claim 1, wherein said glass fiber material is selected from E-glass, A-glass, E-CR-glass, C-glass, D-glass, R-glass, and S-glass.

10. The composition of claim 1, where said glass fiber material is E-glass.

11. The composition of claim 1, wherein said glass fiber is S-glass.

12. The composition of claim 1, wherein said CNTs are selected from the group consisting of single-walled CNTs, double-walled CNTs, multi-walled CNTs, and mixtures thereof.

13. The composition of claim 1, wherein said CNTs are multi-walled CNTs.

14. The composition of claim 1 further comprising a sizing agent selected from a surfactant, an anti-static agent, a lubricant, siloxanes, alkoxysilanes, aminosilanes, silanes, silanols, polyvinyl alcohol, starch, and mixtures thereof.

15. The composition of claim 14, wherein said sizing is a siloxane.

16. The composition of claim 14, wherein said sizing is a silane.

17. The composition of claim 1 further comprising a matrix material selected from an epoxy, a polyester, a vinylester, a polyetherimide, a polyetherketoneketone, a polyphthalamide, a polyetherketone, a polytheretherketone, a polyimide, a phenol-formaldehyde, and a bismaleimide.

18. The composition of claim 1, wherein the electrical resistivity of said carbon nanotube-infused glass fiber is lower than the electrical resistivity of said glass fiber.

19. A continuous CNT infusion process comprising:

(a) disposing a carbon-nanotube forming catalyst on a surface of a glass fiber material of spoolable dimensions; and

(b) synthesizing carbon nanotubes on said glass fiber material, thereby forming a carbon nanotube-infused glass fiber material;

wherein said continuous CNT infusion process has a material residence time of between about 5 to about 300 seconds in a CNT growth chamber.

20. The process of claim 19, wherein a material residence time of about 5 to about 30 seconds produces CNTs having a length between about 1 micron to about 10 microns.

21. The process of claim 19, wherein a material residence time of about 30 to about 180 seconds produces CNTs having a length between about 10 microns to about 100 microns.

22. The process of claim 19, wherein a material residence time of about 180 to about 300 seconds produces CNTs having a length between about 100 microns to about 500 microns.

23. The process of claim 19, wherein more than one glass material is run simultaneously through the process.

24. The process of claim 19 further comprising removing a sizing material from said glass fiber material before disposing said catalyst on said glass fiber.

25. The process of claim 19 wherein said catalyst is an iron-based nanoparticle catalyst.

26. The process of claim 19, wherein the operation of disposing said catalyst on said glass fiber material comprises spraying, dip coating, or gas phase deposition onto said glass fiber material with said solution.

27. The process of claim 19, wherein the step of synthesizing carbon nanotubes comprises CVD growth.

28. The process of claim 19 further comprising applying sizing to said carbon nanotube-infused glass fiber material.

29. The process of claim 19 further comprising applying a matrix material to said carbon nanotube-infused glass fiber.

30. The process of claim 19 further comprising:

a) synthesizing a first amount of a first type of carbon nanotube on said glass fiber material, wherein said first type of carbon nanotube is selected to alter at least one first property of said glass fiber material; and

b) synthesizing a second amount of a second type of carbon nanotube on said glass fiber material, wherein said second type of carbon nanotube is selected to alter at least one second property of said glass fiber material.

31. The process of claim 30, wherein said first amount and said second amount are different.

32. The process of claim 30, wherein said first amount and said second amount are the same.

33. The process of claim 30, wherein said first type of carbon nanotube and said second type of carbon nanotube are the same.

34. The process of claim 30, wherein said first type of carbon nanotube and said second type of nanotube are different.

35. The process of claim 30, wherein said first property and said second property are the same.

37. The process of claim 30, wherein said at least one first property and at least one second property are independently selected from the group consisting of tensile strength, Young'"'"'s Modulus, shear strength, shear strength, shear modulus, toughness, compression strength, compression modulus, composite density, EM wave absorptivity/reflectivity, acoustic transmittance, electrical conductivity, and thermal conductivity.

36. The process of 30, wherein said first property and said second property are different.

38. A continuous CNT infusion process comprising:

(a) extruding a glass fiber material from a glass melt;

(b) disposing a carbon-nanotube forming catalyst on a surface of the glass fiber material; and

(c) synthesizing carbon nanotubes on said glass fiber material, thereby forming a carbon nanotube-infused glass fiber material.

39. The process of claim 38, wherein said continuous CNT infusion process has a linespeed of between about 25 to about 100 ft/min.

40. The process of claim 38, wherein said glass fiber material is a glass filament, a glass strand, a glass roving or a glass tape.

41. The process of claim 38, wherein said catalyst is an iron-based nanoparticle catalyst.

42. The process of claim 38, wherein the operation of disposing said catalyst on said glass fiber material comprises spraying, dip coating, or gas phase deposition onto said glass fiber material.

43. The process of claim 38 wherein the step of synthesizing carbon nanotubes comprises CVD growth.

44. The process of claim 38 further comprising applying a sizing to said carbon nanotube-infused glass fiber material.

45. The process of claim 38 further comprising applying a matrix material to said carbon nanotube-infused glass fiber material.

46. A process for continuous CNT infusion to a glass fiber material of spoolable dimensions comprising:

removing sizing material from a glass fiber material;

applying a carbon nanotube-forming catalyst to said glass fiber material after sizing removal;

heating said fiber to at least 500°

C.; and

synthesizing carbon nanotubes on said glass fiber material.