Modified porous membranes, methods of membrane pore...

Details Modified porous membranes, methods of membrane pore... Modified porous membranes, methods of membrane pore...

B - Operations, Transporting

01

D

B01D 63/00 (2006.01) B01D 71/00 (2006.01)

Patent

CA 2676391

The present invention describes a method of modifying pores of a porous membrane, comprising contacting the membrane with a pore modifying agent, wherein the pore modifying agent modifies the pore opening at the first surface of the membrane differently than the pore opening at the second surface of the membrane. The invention also describes a porous membrane having a first surface and a second surface, comprising a plurality of pores extending between the first and second surfaces, wherein the pores have been modified by a pore modifying agent such that the pore opening at one membrane surfaces is distinct from the pore opening of the other membrane surface, or the pore shape is distinct at one or more locations between the first and second surfaces.

La présente invention décrit un procédé de modification des pores d'une membrane poreuse qui comporte la mise en contact de la membrane avec un agent de modification de pore, l'agent de modification de pore modifiant l'ouverture de pore au niveau de la première surface de la membrane différemment de l'ouverture de pore au niveau de la seconde surface de la membrane. L'invention décrit également une membrane poreuse ayant une première surface et une seconde surface, comportant une pluralité de pores s'étendant entre les première et seconde surfaces, les pores ayant été modifiés par un agent de modification de pore, de sorte que l'ouverture de pore au niveau d'une première surface de membrane est différente de l'ouverture de pore au niveau de l'autre surface de membrane, ou la forme de pore est différente au niveau d'un ou de plusieurs emplacements entre les première et seconde surfaces.

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