Separation of semi-conducting and metallic single-walled carbon nanotubes using a polytungstate

US10676360B2 · kind B2 · utility

Assignee

• Clap Co., Ltd. · KR

Inventors

• Wieland Reis · Heidelberg, DE
• Alexander Kraus · Evenhausen, DE
• Jules Mikhael · Mannheim, DE
• Michael Kaiser · Heidelberg, DE
• Matthias Schwab · Amorbach, DE
• Thomas Weitz · Bad Dürkheim, DE
• Michel Kettner · Mannheim, DE

Key dates

• Filing date: Sep 22, 2015
• Grant date: Jun 9, 2020
• Expiry date: Sep 1, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/549
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention relates to a method for separating semi-conducting and metallic single-walled carbon nanotubes from each other and, if present, from other carbonaceous material, or for separating semi-conducting or metallic single-walled carbon nanotubes from other carbonaceous material via density separation using a solution of a polytungstate; to semi-conducting or metallic single-walled carbon nanotubes obtained by this method; and to the use of these semi-conducting or metallic single-walled carbon nanotubes. The invention further relates to the use of a polytungstate, particularly sodium polytungstate, for separating semi-conducting single-walled carbon nanotubes from metallic single-walled carbon nanotubes, or for separating semi-conducting single-walled carbon nanotubes from undesired carbonaceous material, particularly from metallic single-walled carbon nanotubes, or for separating metallic single-walled carbon nanotubes from undesired carbonaceous material, particularly from semi-conducting single-walled carbon nanotubes. The invention also relates to specific polyarylethers containing phosphate groups and their use as surface-active compounds.