Membrane with improved permeability and selectivity
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United States of America Patent
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Jan 12, 2021
Grant Date -
Nov 25, 2010
app pub date -
May 22, 2009
filing date -
May 22, 2009
priority date (Note) -
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Abstract
A semipermeable asymmetric hollow fiber membrane is provided, based on a hydrophobic polymer, such as polyethersulfone or polysulfone, and on a hydrophilic polymer, such as PVP. The PVP polymer comprises a high molecular weight component and a low molecular weight component. The membrane has a significantly improved permeability and selectivity, based on its structure, composition, and the method of manufacture of the membrane A process for manufacturing such a membrane by a solvent phase inversion spinning process is also provided.
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