METHOD FOR THE COVALENT FUNCTIONALIZATION OF CARBON NANOTUBES WITH SIMULTANEOUS ULTRASOUND DISPERSION FOR INTRODUCING EPOXY COMPOSITIONS Russian patent published in 2018 - IPC C01B32/174 B82B3/00 B82Y30/00 B82Y40/00 C08K3/04 C08K5/17 C08K13/02 

FIELD: technological processes.

SUBSTANCE: invention can be used in the manufacture of epoxy compositions. Surface of carbon nanotubes (CNTs) is fluorinated by treating a powder of non-functionalized nanotubes with fluorine gas. Fluorine is then replaced with the desired molecular moiety in the presence of catalytic amounts of pyridine. Substitution reaction of fluorine by a molecular fragment with two or more epoxy groups is carried out in a solution of 50–60 % epoxydian resin ED20, 1–5 % epoxy-lanolin EN-6 resin, 50–80 % of epoxy aliphatic resin DEG-1 in N-methylpyrrolidone or dimethylformamide. Fluorine substitution reaction with a molecular fragment with two or more amino groups is carried out in a solution of 1–5 % diaminodiphenylmethane, diaminodiphenylsulfone, aniline formaldehyde resin SF-341A, polyamine-polyethylene in N-methylpyrrolidone / dimethylformamide. Simultaneously with the replacement of fluorine by said molecular fragments, dispersion is carried out by sonication with a concentrator at a frequency of 22–44 kHz, power of radiation 30–40 W/cm² and transmitted energy of 0.2–0.8 kW⋅h/l. Concentration of CNT 1–2 g/l. CNTs are obtained that are covalently functionalized with molecular moieties including epoxy or amino groups.

EFFECT: invention provides a high degree of functionalization.

3 cl, 9 dwg, 3 tbl, 4 ex