Spinning, processing, and applications of carbon nanotube filaments, ribbons, and yarns
First Claim
1. A process of making a structure containing carbon nanotubes which comprises:
- forming a uniform suspension of carbon nanotubes in a liquid;
coagulation spinning the suspension to form the structure; and
annealing the structure at an annealing temperature or temperatures sufficient to stabilize the structure against swelling and loss of mechanical strength upon immersion in water or other liquid.
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Accused Products
Abstract
Coagulation spinning produces structures such as fibers, ribbons, and yarns of carbon nanotubes. Stabilization, orientation, and shaping of spun materials are achieved by post-spinning processes. Advantages include the elimination of core-sheath effects due to carbonaceous contaminants, increasing mechanical properties, and eliminating dimensional instabilities in liquid electrolytes that previously prohibited the application of these spun materials in electrochemical devices. These advances enable the application of coagulation-spun carbon nanotube fibers, ribbons, and yarns in actuators, supercapacitors, and in devices for electrical energy harvesting.
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Citations
36 Claims
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1. A process of making a structure containing carbon nanotubes which comprises:
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forming a uniform suspension of carbon nanotubes in a liquid;
coagulation spinning the suspension to form the structure; and
annealing the structure at an annealing temperature or temperatures sufficient to stabilize the structure against swelling and loss of mechanical strength upon immersion in water or other liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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- 20. A coagulation spun structure comprising single-wall carbon nanotubes, the structure swelling by less than about 10% in diameter when immersed in water.
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26. A fiber, ribbon or yarn comprising greater than about 90 weight percent carbon single-wall nanotubes, wherein average diameter of the single-wall carbon nanotubes is about in the range of about 0.6 nm to about 0.9 nm.
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27. A fiber comprising single-wall carbon nanotubes, the fiber containing no binding agent or carbonaceous impurities.
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28. A process of coagulation spinning of a fiber, ribbon, or yarn, which comprises:
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providing a first liquid comprising a uniform dispersion of single-wall-carbon nanotubes; and
injecting the first liquid as a jet into a second coagulation liquid, the jet being formed in an orifice of decreasing diameter, which creates a converging flow field at close to the point of injection into the second coagulation liquid.
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Specification