METHOD OF PRODUCING COMPOSITE MEMBRANE WITH FIXED POLYANILINE LAYER THICKNESS Russian patent published in 2013 - IPC B01D71/60 

FIELD: chemistry.

SUBSTANCE: invention relates to articles made from high-molecular weight polymer compounds. Disclosed is a method of producing a composite membrane with a fixed polyaniline layer thickness, which involves boiling the starting non-conducting film of a copolymer of tetrafluoroethylene and perfluoro(3,6-dioxa-4-methyl-7-octene)sulphonyl fluoride (F-4SF) in 10% NaOH solution for 10-40 minutes to form a charged sulphonated layer of MF-4SK with a different thickness, washing the obtained film with distilled water, conversion thereof to H⁺ form, subsequent synthesis of polyaniline with a charged sulphonated layer through successive action of 1 M solution of protonated aniline (C₆H₅NH⁺ ₃) for 1 hour and 0.1 M ammonium persulphate (NH₄)₂S₂O₈ polymerisation initiator for 1 hour and boiling in ammonia water for soft alkaline saponification of the remaining inert non-conducting F-4CF film.

EFFECT: method of producing a composite membrane with a controlled thickness of polyaniline layer, having high electroconductivity and selectivity.

1 cl, 1 tbl, 6 dwg