METHOD OF PRODUCTION OF FLEXIBLE NANOPOROUS COMPOSITE MEMBRANE WITH CELLULAR STRUCTURE OF ANODE METAL OXIDE OR ALLOY Russian patent published in 2015 - IPC B01D69/02 B01D71/02 C25D11/12 B82Y30/00 

FIELD: nanotechnology.

SUBSTANCE: invention relates to the field of nanotechnology, namely to a method of production of flexible nanoporous composite membrane with a cellular structure of anode metal oxide or alloy, and may be used for formation of ceramic membranes with high permeability, which are stable at high differential pressures. The protective layer is applied by selective anodising of the foil surface of metal or alloy to obtain a barrier oxide layer, the cells of the porous oxide film of metal or alloy are formed on the unprotected parts of by repeated anodising, removal of unreacted metal or alloy on the back side of the foil by anodic oxidation and the subsequent chemical dissolution of the oxide film produced on the back side of the foil.

EFFECT: obtaining of flexible porous membranes is provided, which are stable at high differential pressures (more than 10 atm), and which enable to reduce significantly the probability of formation of cracks in the oxide layer during assembly of the filtering elements and carrying out baromembrane processes of enrichment/separation.

11 cl, 5 dwg, 1 ex