NANOCOMPOSITE MAGNETIC MATERIAL BASED ON A POLYCONJUGATED POLYMER AND A MIXTURE OF MAGNETIC NANOPARTICLES AND A METHOD FOR PRODUCTION THEREOF Russian patent published in 2022 - IPC C08K3/08 C08K3/22 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: present invention relates to a group of inventions: nanocomposite magnetic material; method of producing nanocomposite magnetic material. Nanocomposite magnetic material includes a polymer matrix of a polyconjugated polymer in which cobalt- and iron-containing magnetic nanoparticles are dispersed. Polymer matrix contains polydiphenylamine-2-carboxylic acid (PDPAC). Magnetic nanoparticles are a mixture of magnetic Co-Fe, γ-Fe, β-Co, Fe₃C nanoparticles with diameter of 20÷50 nm and diameter 120÷380 nm. Total content of magnetic nanoparticles in said material is 25–63 wt.% and cobalt content of 5–30 wt.% of the weight of the Fe₃O₄/PDPAC nanocomposite. This method involves obtaining a precursor from a magnetic liquid by removing an organic solvent from the liquid at temperature of 60–85 °C and infrared heating of precursor for 2–10 minutes in an argon atmosphere at temperature of 700–800°C. Magnetic liquid is a stable suspension of the Fe₃O₄/PDPAC nanocomposite with a core-shell structure based on a polyconjugated polymer and magnetic nanoparticles, in which a Co (II) salt is dissolved with cobalt content of 5–30 wt.% of the weight of the Fe₃O₄/PDPAC nanocomposite.

EFFECT: development of nanocomposite magnetic material with high saturation magnetization and high thermal stability, which can be used to create contrasting materials for magnetic resonance tomography as electromagnetic radiation absorbing materials, as well as in high-temperature processes as protective coatings, structural materials, electrochemical current sources.

2 cl, 19 dwg, 1 tbl, 15 ex