COMPOSITE ARTICLE Russian patent published in 2022 - IPC B01D69/12 B01D69/14 B01D67/00 B01D71/02 B01D71/06 B01D53/02 B01D53/22 B05D3/14 C10L3/10 

FIELD: production of composite materials.

SUBSTANCE: invention relates to a composite article, a method for production and use thereof, particularly for separation of gases. Composite article comprising, on a porous substrate and in voids of a substrate, which includes fibers, preferably from a non-conductive material, porous layer 1 consisting of oxide particles bonded to each other and partially to a substrate, which include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from Al₂O₃, ZrO₂, TiO₂ and SiO₂, and comprising, on at least one side, an additional porous layer 2 comprising oxide particles bonded to each other and partially to layer 1, which include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from Al₂O₃, ZrO₂, TiO₂ and SiO₂, where oxide particles present in layer 1 have median particle size d50 from 0.5 to 4 mcm, and median particle size d50 of oxide particles in layer 2, ranges from 0.015 to 0.15 mcm, preferably from 0.04 to 0.06 mcm. Multiple application of layers of oxide particles on said substrates enables to obtain flexible and tear-resistant composite articles having a very smooth surface with fine pores, and when used as carrier materials for polymer separation layers, homogeneous polymer surfaces are provided, characterized by uniform permeability over the entire surface, and therefore effective separation.

EFFECT: size of used oxide particles provides uniform impregnation of substrate, which guarantees absence of resulting cavities and inclusions of air in composite article, as a result of which the composite article is not compacted at compression stress, and the pore structure is not destroyed.

21 cl, 2 dwg, 19 tbl