THERMALLY INDUCED GRAFTING OF NON-WOVEN MATERIALS FOR HIGHLY EFFICIENT ION-EXCHANGE SEPARATION Russian patent published in 2020 - IPC B01D71/28 C08J5/22 C08J7/16 C08K5/14 C08K5/23 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a grafted polymer and a functionalised non-woven membrane adapted for use in separation processes, and a membrane thus obtained, as well as to separation methods using a membrane. Method of producing a grafted polymer and a functionalised nonwoven membrane adapted for use in capturing a target molecule involves: i) obtaining a nonwoven fabric comprising a plurality of polymer fibres; ii) grafting polymerisation of the acrylate or methacrylate polymer onto a plurality of polymer fibres to obtain multiple polymer segments covalently attached to the fibres, resulting in grafting of the polymer grafted, wherein the graft polymerisation step includes: a) contacting the nonwoven web with a solution containing a thermal free-radical initiator to ensure absorption of the thermal initiator into the nonwoven web, b) contacting the nonwoven web with a solution containing at least one acrylate or methacrylate monomer, and c) heat treatment on the non-woven fabric to initiate polymerisation of the acrylate or methacrylate monomer; and iii) functionalising the fibres grafted with the polymer to attach at least one functional group capable of binding the target molecule to polymer segments of the grafted polymer fibres.

EFFECT: thermally induced grafting of non-woven materials for highly efficient ion-exchange separation is disclosed.

22 cl, 13 dwg, 2 tbl