Composite solvent resistant nanofiltration membranes
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United States of America Patent
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Sep 5, 2000
Grant Date -
N/A
app pub date -
Jan 25, 1999
filing date -
Jan 25, 1999
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Abstract
The invention disclosed relates to a nanofiltration composite membrane that is solvent and pH stable and may be used to separate at least one dissolved or suspended component from a liquid phase, including (a) a substrate ultrafiltration membrane formed from an ethylenically unsaturated nitrile, such as acrylonitrile and substituted acrylonitrile polymers, and (b) a coating of a hydrophilic polymer containing reactive functional groups. Preferably, the reactive functional groups described in (b) are subjected to a post-coating cross-linking reaction with a substantially non-cytotoxic cross-linking agent such as bi-functional aldehydes. A method for the preparation of such composite membranes is also disclosed.
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