Affinity separation with activated polyamide microporous membranes
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United States of America Patent
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Oct 1, 1991
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N/A
app pub date -
Feb 9, 1990
filing date -
Feb 9, 1990
priority date (Note) -
Expired
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Abstract
Affinity membranes are prepared by activation of polyamide microporous films. In particular, the films are activated with 1,1'-carbonyldiimidazole, 2-fluoro-1-methylpyridinium.sup.(+) toluene-4-sulfonate.sup.(-), trichlorotriazine, or derivatives thereof, followed by binding of ligand to the activated sites. The polyamide microporous activated films include composite films comprising polyamide covalently bound to a polyhydroxyl compound such as a polysaccharide.
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