METHOD FOR CHROMATOGRAPHIC SEPARATION OF SINGLE-LAYER CARBON NANOTUBES BY CHIRALITY Russian patent published in 2019 - IPC C01B32/159 B82B3/00 C01B32/172 B82Y30/00 

FIELD: technological processes.

SUBSTANCE: invention relates to methods of processing disperse carbon materials and specifically relates to production of deagglomerated undeformed single-layer carbon nanotubes for chromatographic chirality separation. Method for chromatographic separation of monolayer carbon nanotubes by chirality involves ultrasonic treatment of suspension of nanotubes in aqueous solution of sodium dodecyl sulphate, passing the suspension through a column filled with gel based on the cross-linked allyl dextran, removing the non-bound nanotubes and collecting the single-layer carbon nanotubes by passing the desorbent. Before the stage of ultrasonic treatment, a portion of carbon nanotubes is suspended in a supercritical fluid for at least 30 minutes and then the whole volume of the suspension is sharply sprayed in 2–5 % aqueous solution of sodium dodecyl sulphate. Ultrasonic treatment time is 0.5–3 hours at specific power 30–120 W/cm². Desorbent used is 0.5–10 % aqueous solution of sodium desoxycholate.

EFFECT: invention enables to obtain high-quality aqueous dispersions of de-agglomerated single-wall carbon nanotubes with high output without the need for prolonged destructive ultrasonic action, and also enables to perform efficient chromatographic separation to obtain single-layer carbon nanotubes of certain chirality, in demand primarily in optoelectronics and biosensorics.

1 cl, 3 dwg, 3 ex