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Carbon nanotube agglomerate
US9422162B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9422162-B2 |
| Application number | US-201013391361-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 7, 2010 |
| Priority date | Aug 21, 2009 |
| Publication date | Aug 23, 2016 |
| Grant date | Aug 23, 2016 |
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- Title
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Abstract
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The invention relates to a method for producing carbon nanotubes in the agglomerated form and thus obtained novel carbon nanotube agglomerates.
First claim
Opening claim text (preview).
The invention claimed is: 1. Particles comprising an agglomerate of carbon nanotubes which have a diameter of from 3 to 100 nm and a length to diameter ratio of at least 5, wherein the agglomerate contains bundles of carbon nanotubes in the form of bulged-out yarns of carbon nanotubes intertwined with one another, wherein the carbon nanotubes in the bulged-out yarn bundle have an average distance from one another in the range of from 20 to 100 nm, wherein at least 95 wt. % of the agglomerate particles have an outer diameter in the range of from 100 μm to 1500 μm. 2. The agglomerate particles according to claim 1 , wherein the agglomerate has a bulk density according to EN ISO 60 of from 20 to 250 kg/m3. 3. The agglomerate particles according to claim 1 , wherein the carbon nanotubes are present in the bulged-out yarn bundle intertwined in one another and essentially are not aligned straight with respect to one another. 4. The agglomerate particles according to claim 1 , wherein the bulged-out yarns of carbon nanotubes essentially have a diameter of from 0.1 μm to 20 μm. 5. The agglomerate particles according to claim 1 , wherein the agglomerate contains, apart from the carbon nanotube bundles in the form of bulged-out yarns, other structured bundle forms of carbon nanotubes, in a bird's nest structure, in an open net structure or in the form of fibril bundles aligned parallel to one another, up to a content of less than 30%. 6. The agglomerate particles according to claim 1 , wherein the carbon nanotubes have a content of impurities of at most 7 wt. %. 7. The agglomerate particles according to claim 1 , wherein the carbon nanotubes are present in the form of multi-wall carbon nanotubes or are based on rolled-up, multi-layer graphene layers. 8. A mixture or composite comprising particles according to claim 1 and a polymer, a rubber, a ceramic, a metal, a metal alloy, a glass or a textile fiber.
Assignees
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Classifications
Cobalt · CPC title
Magnesium · CPC title
Physical dimension · CPC title
Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title
Precipitation · CPC title
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Frequently asked questions
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- What does patent US9422162B2 cover?
- The invention relates to a method for producing carbon nanotubes in the agglomerated form and thus obtained novel carbon nanotube agglomerates.
- Who is the assignee on this patent?
- Hocke Heiko, Weber Ralph, Bramer-Weger Elmar, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B01J23/002. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 23 2016 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).