Method for making carbon fibers, modified multiwall carbon nanotubes

摘要

FIELD: production processes.;SUBSTANCE: method involves drawing of carbon fibre through solution with further heat treatment in flow-through gas medium. As solution there used is either solution containing pre-synthesised thin multi-layered carbon nanotubes functionalised with hydroxylic and carboxylic groups in dimethyl formamide or in dimethyl acetamide or in dimethyl sulfoxide with concentration of 0.1-10 g/l, or catalytic solution containing medium for forming embryos for growing nanotubes at heat treatment, and as catalytic solution there used is water solution Co(NO₃)₂ with concentration of 0.25 mol/l. As gas medium there used is medium containing gaseous hydrocarbon - methane, and heat treatment is performed by keeping it in reactor at temperature of 800-1000°C during 10-30 minutes.;EFFECT: increasing resistance to fibres being drawn from binding material.;4 cl, 5 ex, 6 dwg