| abstract |
The invention relates to colloidal chemistry, in particular, to the technology of producing ferromagnetic liquids and magnetic rheological suspensions, intended for use in medical and biological research, as well as for the sealing assemblies of apparatus and damping devices of mechanical engineering products. The purpose of the invention is to increase the magnetization, the expansion of bactericidal in pH, as well as the acceleration and increased activity of the bactericidal action of the composite material. The carbonyl iron powder with a particle size of 10 2 ± 10 5 nm is evaporated in a low-temperature plasma with a temperature of 10 4 K in an argon atmosphere. The vaporous iron with a concentration of 0.1–0.3 wt.% Is removed from the reactor and is condensed in an argon gas stream, cooled at a rate of 10 5–10 6 K / s. H / s. The resulting crystals with a size of 10-15 nm are transferred to a dispersion medium containing a stabilizer, such as water at pH 7-9 or oil, and stirring is carried out for 10-15 hours at 50-90 ° C and a residual pressure of 1-3 mm Hg. until the evolution of hydrogen gas is complete. 3 hp ff, 1 tab. |