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OwnerJan J.T.M. SWARTJES, Markus STORR +9inventors
InventorsJan J.T.M. SWARTJES, Markus STORR, Stefanie VOTTELER, Markus HORNUNG, Lars PETERS, Matthias WESSLING, Ilka ROSE, Georg LINZ, Hannah ROTH, Michael HULKO, Annabelle KRAUSS
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The disclosure relates to a method for improving the selectivity of a membrane, specifically of a membrane comprising a blend of i) a polysulfone, polyethersulfone or polyarylethersulfone and ii) polyvinylpyrrolidone, characterized in that the membrane is coated with polydopamine and heparin in a one-step or two-step reaction or by in situ modification with polydopamine followed by coating with heparin. The disclosure further relates to a process for producing such modified membranes having an improved selectivity, and to a filtration/diffusion device comprising the membrane which can be used, for example, in hemodialysis applications.
A method for increasing the selectivity of a membrane for use in blood treatment, the method comprising the steps of
A membrane comprising a blend of (i) at least one of polysulfone, polyethersulfone or polyarylethersulfone, ii) polyvinylpyrrolidone, and (iii) dopamine and which is coated with heparin in amount of from 5 mU/cm2 to 100 mU/cm2 of the membrane surface.
Dependencies are inferred from the claim text.