Cross linking treatment of polymer membranes

Details Cross linking treatment of polymer membranes Cross linking treatment of polymer membranes

C - Chemistry, Metallurgy

08

J

C08J 9/36 (2006.01) B01D 71/26 (2006.01) B01D 71/32 (2006.01) B01D 71/34 (2006.01) B01D 71/38 (2006.01) B01D 71/40 (2006.01) B01D 71/42 (2006.01) B01D 71/62 (2006.01) B01D 71/64 (2006.01) B01D 71/68 (2006.01) B01D 71/82 (2006.01) C08J 5/22 (2006.01)

Patent

CA 2611116

Methods of forming a hydrophilic porous polymeric membrane which include preparing a porous polymeric membrane from a polymer blend which typically contains a hydrophobic non crosslinkable component (e.g. PVdF) and a component which is cross-linkable (for instance, PVP) and treating said porous polymeric membrane under cross linking conditions to produce a modified membrane with greatly improved water permeability and hydrophilic stability. Cross linking condition include chemical (e.g. peroxodisulfate species), thermal or radiation and/or combinations thereof. Non cross linked material may be washed out if desired.

La présente invention concerne des procédés de formation d~une membrane polymère poreuse hydrophile qui comprennent la préparation d~une membrane polymère poreuse à partir d'un mélange de polymères qui contient typiquement un composant non réticulable hydrophobe (par exemple, le PVdF) et un composant qui est réticulable (par exemple, le PVP) et le traitement de ladite membrane polymère poreuse dans des conditions de réticulation de façon à produire une membrane modifiée avec une perméabilité à l'eau et une stabilité hydrophile considérablement améliorées. Les conditions de réticulation comprennent un produit chimique (par exemple, des espèces de type peroxodisulfate), un apport de chaleur ou de lumière et/ou leurs combinaisons. Le matériau non réticulé peut être éliminé par lavage si nécessaire.

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