METHOD FOR INCREASING THE SELECTIVITY OF A MEMBRANE
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United States of America
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Feb 6, 2025
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Dec 16, 2022
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Dec 16, 2022
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Abstract
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.
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