CARBON NANOTUBE FIBRE AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2019 - IPC C01B32/174 B82B3/00 D01F9/12 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: invention relates to nanotechnology and can be used in making lightweight and well conducting materials. Carbon nanotubes are dispersed in a solvent at temperature 80–140 °C. Electric, magnetic, electromagnetic field or a combination thereof is applied on the obtained solution. Then, solution extruding with shear rate of at least 10 s^-1 through at least one hole with diameter of 5–1000 mcm to obtain fibre workpieces, from which after removing solvent obtaining fibre. At said stages, nanotubes are exposed to formation of bonds between adjacent nanotubes, for example, by heating, ionizing, infrared, optical or ultraviolet radiation, introducing a polymerisation catalyst. Carbon nanotubes have purity of at least 90 wt. %, average length from 0.2 mcm to 10 mm, average diameter 0.5–100 nm, average length-to-diameter ratio of at least 5000. Ends of at least a portion of the carbon nanotubes are functionalised by active groups capable of forming a chemical bond, a van der Waals type bond or a combination thereof. Obtained fibres containing ordered nanotubes can be additionally twisted and/or stretched, washed and dried, as well as coating them with metal, for example copper, silver, nickel or mixture thereof, thickness from 0.1–15 nm. Fiber has electric conductivity 0.3–10 MCm/m, heat conductivity 100–2500 W/m * K, modulus of elasticity 10–350 GPa, tensile strength 0.2–5 GPa.

EFFECT: articles containing said fibres are capable of operate at fibre temperatures higher than 100 °C.

76 cl, 18 ex