Method for preparing carbon nanotube or carbon microtube
US8945501B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 30, 2013 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Sep 30, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for preparing a carbon nanotube, including: a) preparing an LPAN solution, stirring the LPAN solution at between 100 and 200° C. for between 100 and 200 hours to yield a cyclized LPAN solution; b) heating the cyclized LPAN solution at between 200 and 300° C. for between 1 and 10 hours to yield an OPAN; c) grinding, screening, and drying at room temperature the OPAN to yield a thermal oxidative precursor; d) calcining the thermal oxidative precursor at between 400 and 1000° C. for between 1 and 24 h in the presence of inert gas having a flow rate of between 10 and 500 mL/min to yield a carbonated precursor; and e) calcining the carbonated precursor at between 1000 and 1500° C. for between 1 and 10 hours in the presence of the inert gas having a flow rate of between 10 and 500 mL/min to yield a carbon nanotube material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.