The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2022
Filed:
Jul. 22, 2020
Korea Institute of Science and Technology, Seoul, KR;
Jae Kap Lee, Seoul, KR;
Kwang Koo Jee, Seoul, KR;
Korea Institute of Science and Technology, Seoul, KR;
Abstract
A method of safely stabilizing carbon nanotubes containing reactive or unstable catalyst metal particles by selective oxidation, or melting and removing the catalyst metal particles under controlled conditions. In one embodiment, the method may include preparing carbon nanotubes containing a residual catalyst metal, pickling the carbon nanotubes, and the subsequence oxidation of the residual catalyst metal by heat-treating without oxidation of the carbon nanotubes. In another embodiment, the method may include preparing carbon nanotubes containing a residual catalyst metal, first acid pickling, melting the residual catalyst metal by heat-treating in a vacuum chamber, and second acid pickling to remove the melted residual catalyst metal.