Polymer additive comprising zwitterionic moieties for vinylidene fluoridepolymer based membranes
AssigneeSyensqo SA
InventorsSophie Deroo, Emanuele Di Nicolo, Guillaume Gody, Marie-Pierre Labeau, Bertrand Pavageau, David James Wilson, Hamza Chouirfa
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Abstract
The present invention pertains to composition suitable for manufacturing membranes based on vinylidene fluoride (VDF) polymers, to porous membranes thereof, to methods for their manufacture and to uses thereof, especially for the filtration of water phases. Said composition comprising vinylidene fluoride (VDF) polymers and polymer additives comprising zwitterionic moieties delivers outstanding hydrophilization performances of manufactured membranes.
Claims17
A composition (composition (C)) comprising:
- at least one vinylidene fluoride (VDF) polymer (polymer (VDF)), and
- at least one polymer (polymer (N-ZW)) comprising zwitterionic recurring units derived from at least one ethylenically unsaturated monomer having at least two ionic groups, at least one of them being a cationic group (group (C+)) and at least one of them being an anionic group (group (A−)), and further comprising at least one hydroxyl group (units (RZW)).
A porous membrane comprising:
- at least one vinylidene fluoride polymer (polymer (VDF)), and
- at least one polymer (polymer (N-ZW)) comprising zwitterionic recurring units derived from at least one ethylenically unsaturated monomer having at least two ionic groups, at least one of them being a cationic group (group (C+)) and at least one of them being an anionic group (group (A−)), and further comprising at least one hydroxyl group (units (RZW)).
A copolymer (N-ZW) comprising zwitterionic recurring units (RZW) derived from 3-((3-acrylamidopropyl)dimethylammonio)-2-hydroxypropane-1-sulfonate (AHPS) and recurring units (RN) derived from at least one monomer selected from the list consisting of alkyl (meth)acrylates, vinyl acetate and N, N-dimethyl acrylamide.
Dependencies are inferred from the claim text.