METHOD OF PRODUCING MICROCAPSULES WITH BIODEGRADABLE LUBRICANT AND FERROMAGNETIC PARTICLES Russian patent published in 2025 - IPC B01J13/02 C10M101/04 C10M103/06 C10M107/32 C10M171/06 C10M177/00 

FIELD: chemistry.

SUBSTANCE: invention relates to microencapsulation, in particular to microencapsulation of environmentally friendly biodegradable lubricants containing ferromagnetic substances in shells. Method of producing microcapsules with biodegradable lubricant and ferromagnetic particles consists in producing oil emulsion with introduction of ferromagnetic particles and a chemical method for synthesis of polyester shells of limited solubility in water, followed by curing. Pre-prepared oil emulsion consisting of 0.366–0.478 g of dicarboxylic acid chloride, 0.5 ml of Polysorb-20, as a surfactant stabilizer, and 2–4 ml of oil containing from 0.3 % to 3 % of magnetite Fe₃O₄, pre-distributed in oil using an ultrasonic unit, in 50 ml of water, is subjected to ultrasonic treatment for 3–10 minutes. Then, while stirring on a magnetic mixer, solution containing 0.5 ml of Polysorb-20, 0.8–1.0 ml of a polyatomic alcohol and 0.5 ml of tetramethylethylenediamine in 50 ml of water is added dropwise. Further, the obtained reaction mixture is stirred on a magnetic stirrer at temperature of 20 °C to 25 °C for 5–7 hours, then settled for 24 hours, then centrifuged at speed of 1000 rpm until the microcapsules are grouped on top of the aqueous phase, and then removed for further drying at room temperature.

EFFECT: development of a method of producing antifriction microcapsules having antiwear and magnetic properties to ensure their supply to the contact zone of triboconjugation surfaces.

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