COMPOSITE NANOMODIFIED PERFLUOROSULPHOCATIONITE MEMBRANE AND METHOD OF OBTAINING THEREOF Russian patent published in 2014 - IPC C08J5/22 B82B1/00 C08J5/20 B01D71/32 

FIELD: chemistry.

SUBSTANCE: membrane is made of a tetrafluoroethylene copolymer with functional perfluorinated comonomers of the general structural formula: where R: (D), (E), (K), M-H, Li, K, Na; a=24.75-18.38 mol.%; b=78.62-81.12 mol.%; c=5.0-0.5 mol.%; and is from 10 mcm and higher thick, density is 1.93-2.10 g/cm³, mechanical strength is 16-22 MPa and a coefficient of gas permeability by hydrogen (K) is 1-3.7×10^-16 m³m m^-2Pa^-1s^-1 at 20-90°C. A method of obtaining consists in combination of a porous polytetrafluoroethylene film with a perfluorosulphocationite polymer in a medium of an organic or a water-organic solvent in the presence of a modifier. The modifier is represented by hydrocarbon polymers, fluoropolymers, perfluoropolymers or their mixtures, inorganic compounds or their mixtures.

EFFECT: high drops of pressure, high current density and efficiency of an electrolysis cell exploitation.

13 cl, 3 tbl, 28 ex