Method for making carbon nanotube wire structure
US-2015368106-A1 · Dec 24, 2015 · US
High strength carbon nanotube plasma-treated fibers and methods of making
US9676630B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9676630-B2 |
| Application number | US-201313903979-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 28, 2013 |
| Priority date | May 25, 2012 |
| Publication date | Jun 13, 2017 |
| Grant date | Jun 13, 2017 |
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Abstract
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Carbon nanotubes have excellent mechanical properties such as low density, high stiffness, and exceptional strength making them ideal candidates for reinforcement material in a wide range of high-performance composites. Fibers with increased tensile strengths are produced by employing plasma treatment under various conditions. Tensile strength is improved by at least 35%, relative to an untreated fiber. Methods of making such high strength carbon nanotube fibers via plasma processing are disclosed.
First claim
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What is claimed is: 1. A method of making a plasma-treated fiber comprising individual carbon nanotubes having a tensile strength improvement, relative to a tensile strength of said fiber prior to said plasma treatment, comprising the steps of (a) obtaining a fiber comprising individual carbon nanotubes, and (b) treating said fiber with a plasma to obtain a plasma-treated fiber comprising individual carbon nanotubes having a tensile strength improvement of at least 10%, relative to a tensile strength of said fiber prior to said plasma treatment. 2. The method of claim 1 wherein said tensile strength improvement is at least 20%. 3. The method of claim 1 wherein said tensile strength improvement is at least 35%. 4. The method of claim 3 wherein said tensile strength is at least 0.65 N/tex. 5. The method of claim 1 wherein said plasma is selected from the group consisting of helium and argon plasma. 6. The method of claim 1 wherein said plasma is a pressurized plasma. 7. The method of claim 1 wherein said plasma treatment forms carbon bonds between the individual carbon nanotubes in the fiber. 8. The method of claim 1 wherein said plasma further comprises a carbon source; and wherein said plasma treatment forms carbon bonds between the individual carbon nanotubes in the fiber. 9. The method of claim 1 wherein said carbon source is methane. 10. The method of claim 1 wherein said fiber has been twisted, and densified with a solvent prior to plasma treatment. 11. The method of claim 1 wherein said fiber has a specific mass measurement, prior to plasma treatment, of 1.5 grams per kilometer of fiber. 12. The method of claim 1 wherein said plasma treatment occurs at a power greater than 130 watts.
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Classifications
- C01B31/0253Primary
Chemistry & Metallurgy · mapped topic
- C01B32/168Primary
After-treatment · CPC title
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- What does patent US9676630B2 cover?
- Carbon nanotubes have excellent mechanical properties such as low density, high stiffness, and exceptional strength making them ideal candidates for reinforcement material in a wide range of high-performance composites. Fibers with increased tensile strengths are produced by employing plasma treatment under various conditions. Tensile strength is improved by at least 35%, relative to an untreat…
- Who is the assignee on this patent?
- Cornwell Charles F, Marsh Charles P, Welch Charles R, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification C01B31/0253. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 13 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).