METHOD OF PRODUCING COMPOSITE FILMS CONSISTING OF NANOFIBRES Russian patent published in 2020 - IPC B82Y40/00 C08J5/18 B01D1/04 

FIELD: nanotechnology; material science.

SUBSTANCE: invention relates to nanotechnology, material science and can be used in designing membranes, substrates and filters. Disclosed method of producing a film of nanofibres comprises preparing solutions of two or more polymers, forming nanofibres of polymers by electrospinning and forming a film of a mixture of nanofibres. According to the invention, electrospinning uses a vessel with a liquid in which none of the polymers is soluble and with a counter electrode immersed into the vessel. Electrospinning is carried out by supplying voltage between vessel and electrode and spraying each polymer solution separately from metal capillary into vessel to form polymer nanofibers suspension in said liquid. Then the suspension is mixed with a homogeniser, after which the film is formed by removing the liquid. Spraying polymer solutions into a vessel with a liquid can be carried out sequentially or simultaneously. Besides, liquid can be removed by deposition of nanofibres on the filter or by drying.

EFFECT: invention enables to form films of nanofibres of polymers of different nature and chemical composition.

5 cl, 1 dwg