FIELD: chemistry.
SUBSTANCE: method includes successive procession of microporous membrane with solutions of protonated aniline and ammonium persulfate. Nylon or polytetrafluoroethylene membrane is kept in 1M solution of aniline hydrochloride for 2 hours, then procession of membrane surface by 1M solution of ammonium persulfate is carried out for 10 minutes, after that, membrane is subjected to conditioning in medium with humidity 90% for 96 hours.
EFFECT: obtained is cation-exchange membrane, characterised by gradient distribution of polyaniline particles in membrane thickness and which ensuring high selectivity by cations.
3 dwg, 4 tbl
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