Carbon nanotubes having larger diameter and lower bulk density and process for preparing same
US-2018162734-A1 · Jun 14, 2018 · US
Bundle-type carbon nanotubes and method for preparing the same
US11352260B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11352260-B2 |
| Application number | US-201816318973-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 16, 2018 |
| Priority date | Mar 17, 2017 |
| Publication date | Jun 7, 2022 |
| Grant date | Jun 7, 2022 |
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Abstract
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The present invention relates to a bundle-type carbon nanotube which has a bulk density of 25 to 45 kg/m 3 , a ratio of the bulk density to a production yield of 1 to 3, and a ratio of a tap density to the bulk density of 1.3 to 2.0, and a method for preparing the same.
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The invention claimed is: 1. A bundle-type carbon nanotube which has a bulk density of 25 to 45 kg/m 3 , and satisfies the following Equations 1 and 2: 1.0≤ x/y≤ 3.0 <Equation 1> 1.3≤ z/x≤ 2.0 <Equation 2> wherein x is a number representing a bulk density (units: kg/m 3 ) of the bundle-type carbon nanotube, y is a number representing a production yield of the bundle-type carbon nanotube, wherein production yield=[(total weight of the prepared carbon nanotube)−(weight of supported catalyst used in preparation)]/(weight of supported catalyst used in preparation), and z is a number representing a tap density (units: kg/m 3 ) of the bundle-type carbon nanotube. 2. The bundle-type carbon nanotube of claim 1 , wherein the value of Equation 1 is 1.5 to 2.5. 3. The bundle-type carbon nanotube of claim 1 , wherein the value of Equation 2 is 1.4 to 1.7. 4. The bundle-type carbon nanotube of claim 1 , wherein a production yield of the carbon nanotube is 10 to 40. 5. The bundle-type carbon nanotube of claim 1 , wherein a tap density of the carbon nanotube is 35 to 70 kg/m 3 . 6. The bundle-type carbon nanotube of claim 1 , wherein a specific surface area of the carbon nanotube is 150 to 300 m 2 /g. 7. A conductive material dispersion comprising the bundle-type carbon nanotube of claim 1 .
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Specific surface area · CPC title
Multi-walled nanotubes · CPC title
Aligned nanotubes · CPC title
Mechanical properties · CPC title
Single-walled nanotubes · CPC title
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- What does patent US11352260B2 cover?
- The present invention relates to a bundle-type carbon nanotube which has a bulk density of 25 to 45 kg/m 3 , a ratio of the bulk density to a production yield of 1 to 3, and a ratio of a tap density to the bulk density of 1.3 to 2.0, and a method for preparing the same.
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification C01B32/162. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 07 2022 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).