ZETA POSITIVE HYDROGENATED NANODIAMOND POWDER, ZETA POSITIVE SINGLE-DIGIT HYDROGENATED NANODIAMOND DISPERSION AND METHODS FOR PRODUCING SAME Russian patent published in 2018 - IPC C01B32/15 C01B32/28 B82B3/00 B82B1/00 B82Y40/00 

FIELD: nanotechnologies.

SUBSTANCE: invention relates to nanotechnology. Zeta positive hydrogenated nanodiamond powder is obtained by heating nanodiamond particles in an atmosphere containing 1–10 % hydrogen gas at a pressure of 5 mbar to 20 bar and a temperature of 300–1,000 °C for 1–15 hours. Resulting powder is suspended in a liquid medium to form a suspension, which is subjected to a sound milling in a bead mill. Liquid medium is selected from the group consisting of polar, aromatic or chlorinated solvents, ionic liquids or a mixture of said solvents, for example from water, methanol, ethanol, isopropanol, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, dimethylsulfoxide. Obtained dispersion contains at least 0.2 wt% hydrogenated diamonds of a single-digit nanometer size, has a zeta potential of more than +35 mV, measured at a pH greater than 7. Average particle size distribution of D90 in the dispersion obtained is 2–20 nm.

EFFECT: dispersions obtained are stable, and the method of producing said dispersions is safe due to the reduction of the amount of hydrogen used.

31 cl, 14 dwg, 1 tbl