POROUS MEMBRANE Russian patent published in 2023 - IPC B01D69/02 B01D69/08 B01D69/10 B01D69/12 B01D71/40 B01D71/68 D01F6/76 D06M15/263 D06M101/30 

FIELD: membranes.

SUBSTANCE: group of inventions relates to a porous membrane for removing viruses, a method for producing a porous membrane, and a method for reducing membrane adhesion. The porous membrane for removing viruses contains a hydrophobic polymer and a hydrophilic polymer, where the average value of T for the ratios between the number of ion counts produced from the hydrophilic polymer and the number of ion counts produced from the hydrophobic polymer is 1.0 to 7.0 when measuring the surface of the porous membranes using time-of-flight secondary ion mass spectrometry (TOFMS), wherein the ion derived from the hydrophobic polymer is C₆H₄O with m/z of 92, the ion derived from the hydrophilic polymer is C₄H₅O₂ with m/z of 85, the hydrophilic polymer is a methacrylate-based polymer, the hydrophobic polymer is a polysulfone-based polymer, and the hydrophilic polymer is coated on the base material membrane containing the hydrophobic polymer. Also described is a method for producing a porous membrane containing a hydrophobic polymer and a hydrophilic polymer, and a method for reducing the adhesion of the membrane after hydrophilization of the membrane from the base material containing the hydrophobic polymer.

EFFECT: provision of a porous membrane characterized by reduced membrane adhesion during production of the porous membrane, with the possibility of not only efficient production of the membrane module, but also preventing deterioration of the performance of the porous membrane.

12 cl, 1 tbl, 15 ex