FIELD: process engineering.
SUBSTANCE: invention relates to membrane technologies. Solution of sulfonated polytetrafluoroethylene in organic solvent is applied on the surface of heterogeneous ion-exchange membranes made of polyethylene and ion polymer dispersed therein. Membrane is pre-dried and processed icy acetic acid to be introduced in sulfonated polytetrafluoroethylene solution. Now, membrane is subjected to heat treatment.
EFFECT: mechanically strong membranes sustaining electrodialysis.
5 tbl
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