Melt-spun polysulfone semipermeable membranes and methods...

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B01D 71/68 (2006.01) B01D 67/00 (2006.01) B01D 69/08 (2006.01) B01D 71/62 (2006.01) C08J 3/09 (2006.01)

Patent

CA 2511116

The present invention provides, inter alia, a composition useful for producing a homogeneous, semipermeable membrane, the composition comprising a polysulfone semipermeable membrane, the polysulfone semipermeable membrane comprising a mixture of: an ultra-high-molecular-weight hydrophilic polymer, a polysulfone compound and a solvent for the polysulfone compound, and the polysulfone semipermeable membrane having a homogeneous structure such that the polysulfone semipermeable membrane has a substantially uniform structure. Another aspect of this invention discloses methods for fabricating semipermeable membranes by homogeneously mixing the composition, melting the composition, and melt-spinning the molten composition. Another aspect of the present invention includes homogeneous, melt-spun, semipermeable membranes useful for liquid separation processes, such as, but not limited to, microfiltration, ultrafiltration, dialysis, and reverse osmosis.

La présente invention a trait, entre autres, à une composition utile pour la production d'une membrane homogène semi-perméable, la composition comportant une membrane semi-perméable de polysulfone, la membrane semi-perméable de polysulfone comprenant un mélange contenant : un polymère hydrophile de poids moléculaire très élevé, un composé de polysulfone et un solvant pour le composé de polysulfone, et la membrane semi-perméable de polysulfone présentant une structure homogène de sorte que la membrane semi-perméable de polysulfone a une structure sensiblement uniforme. Dans un autre mode de réalisation, l'invention a trait à des procédés pour la fabrication de membranes semi-perméables par le mélange homogène de la composition, la fusion de la composition et le filage par fusion de la composition en fusion. Dans un autre mode de réalisation, la présente invention a trait à des membranes homogènes semi-perméables filées par fusion utiles pour des procédés de séparation de liquides, tel que, mais de manière non exclusive, la microfiltration, l'ultrafiltration, la dialyse, et l'osmose inverse.

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