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Boron nitride nanotube fibrils and yarns

a boron nitride and nanotube technology, applied in the field of nanostructure production, can solve the problems of not reporting the same progress for bnnts, not showing the production of boron nitride fibrils that can be bunched and spun into yarns, and little progress in the scale-up of their synthesis

Inactive Publication Date: 2010-08-05
NASA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0010]It is therefore an object of the present invention to provide a method for the production of boron nitride nanotube fibrils that can be relatively easily spun or otherwise processed into boron nitride nanotube yarns.

Problems solved by technology

Since the announcement of the successful synthesis of relatively high-aspect-ratio few-walled boron nitride nanotubes (FW-BNNTs) in 1995, little progress has been made in the scale-up of their synthesis.
Although progress has been made in synthesizing long strands and yarns of carbon nanotubes, similar progress has not been reported for BNNTs.
While each of the foregoing Applications describe highly useful and efficient methods and apparatus for the production of BNNTs, they have not demonstrated the production of boron nitride fibrils that can be bunched and spun into yarn.

Method used

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  • Boron nitride nanotube fibrils and yarns
  • Boron nitride nanotube fibrils and yarns
  • Boron nitride nanotube fibrils and yarns

Examples

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Embodiment Construction

[0017]The benefits of the present invention are achieved by providing a process for producing boron nitride nanotubes and nanostructures, which comprises:[0018](a) providing a boron-containing target in a chamber under nitrogen pressure which is elevated above atmospheric; and[0019](b) thermally exciting a boron-containing target.

[0020]Especially advantageous results are obtained if the boron-containing target is thermally excited by means of a laser, such as a free electron laser or a carbon dioxide laser.

[0021]Beneficial results are obtained if the boron-containing target is made of compressed boron powder or compressed boron nitride powder.

[0022]The target is advantageously cylindrical, rotating, and illuminated on the radius, or cylindrical, rotating, and illuminated on one face. However, the target may also be stationary. Further preferred target orientation and illuminations are described in greater detail below.

[0023]Highly desirable and very advantageous results are obtained...

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Abstract

A method for the production of long, high aspect ratio boron nitride nanotubes and boron nitride nanotube fibrils composed of single or few walled boron nitride nanotubes aligned in bundles of nanotubes 20 μm and longer at a rate of above about 1 meter per second. Nanotube yarns comprised of twisted bundles of such nanotube fibrils are also described.

Description

[0001]This application is a continuation-in-part of U.S. patent application Ser. No. 12 / 322,591 filed Feb. 4, 2009 for “Apparatus for the Production of Boron Nitride Nanotubes”.[0002]The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Cooperative Agreement No. NCC-1-02043 awarded by the National Aeronautics and Space Administration and Management and Operating Contract DE-AC05-060R23177 from the United States Department of Energy.FIELD OF THE INVENTION[0003]The present invention relates to the production of nanostructures and more particularly to a method for the high rate production of long stranded boron nitride nanotube fibers, boron nitride nanotube fibrils and boron nitride nanotube yarns.BACKGROUND OF THE INVENTION[0004]Since the announcement of the successful synthesis of relatively high-aspect-ratio few-walled boron nitride nanotube...

Claims

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Application Information

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IPC IPC(8): D02G3/02
CPCB82Y30/00C01B21/0641C01B21/0648C01P2004/13C01P2004/133Y10T428/2916C04B35/6229C04B2235/526C04B2235/5284D02G3/02D10B2101/14C01P2004/16B82B1/00B82B3/00B82Y40/00
Inventor SMITH, MICHAEL W.JORDAN, KEVIN
Owner NASA
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