Membranes having enhanced selectivity and method of producing such membranes
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United States of America Patent
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Jun 1, 1993
Issued Date -
N/A
app pub date -
May 11, 1992
filing date -
Jun 12, 1991
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Expired
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Abstract
Glassy polymeric gas separation membranes are chemically modified throughout the thickness thereof. Such membranes manifest selectivity for a pair of gases which is greater than the intrinsic selectivity of the glassy polymeric material and which is greater than the equilibrium intrinsic selectivity of the chemically modified glassy polymeric material.
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