Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Filaments
Reexamination Certificate
2008-05-16
2010-11-23
Tentoni, Leo B (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Filaments
C264S210600, C264S211000
Reexamination Certificate
active
07837905
ABSTRACT:
Strengthened filaments and fibers are realized by mixing and dissolving monomer and catalyst in a solvent into open-ended nanotubes to form a polymer precursor prior to polymerization in which the open nanotubes are filled with monomer and catalyst. The remaining steps for forming a stabilized filament may follow the conventional sequence. The result is that the nanotubes are “doubly-embedded” in the polymer matrix (bonds to the polymer inside and extending through the nanotube and bonds to other polymer chains outside the nanotube) in the filament. These additional bonds provide additional mechanical strength. The number of bonds may be further enhanced by pretreating the nanotubes to create defects in the nanotubes to form sites along the inner and outer walls for additional polymer-to-nanotube bonds. The aligned filaments may be radiated to create additional polymer-to-nanotube bonds such as between the polymer chain inside the nanotube and the inner walls of the nanotube and to create nanotube-to-nanotube bonds. In the case of carbon fiber, the carbonized filament may be radiated to create additional carbon-carbon bonds prior to twisting the filaments into the fiber.
REFERENCES:
patent: 2007/0137786 (2007-06-01), Luzzi
patent: 2008/0019485 (2008-01-01), Weiss et al.
patent: 2009/0242850 (2009-10-01), Park et al.
Daenen et al., The wonderous world of carbon nanotubes, Eindhoven University of Technology, Feb. 27, 2003, pp. 1-23.
Striemer et al., Charge- and size-based separation of macromolecules using ultrathin silicon memranes, 2007 Nature Publishing Group, pp. 749-753.
P. M. Ajayan, Nanotubes from carbon, 1999 American Chemical Society, May 1, 1999, pp. 1787-1799.
Kumar et al. “Stabilization and Carbonization of Gel Spun Polyacrylonitrile/Single Wall Carbon Nanotube Composite Fibers” Feb. 28, 2007, AFRL-SR-AR-TR-07-0088.
Sreekumar et al. “Polyacrylonitrile Single-Walled Carbon Nanotube Composite Fibers” Adv. Mater. 2004, 16, No. 1, Jan. 5, pp. 58-61.
Mahfuz et al. “Manufacturing and Characterization of Carbon Nanotube/Polyethylene Composites” Int. Journal of Nanoscience vol. 4, No. 1 (2005) 55-72.
Liu et al. “Encapsulation of polystyrene within carbon nanotubes with the aid of supercritical CO2”, Letters to the Editor, Carbon 42 (2004) 423-460.
Barker Delmar L.
Jordan Mead M.
Poisl W. Howard
Gifford Eric A.
Raytheon Company
Tentoni Leo B
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