Tetrazole functionalized polymer membranes
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United States of America Patent
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Aug 26, 2014
Grant Date -
Jun 13, 2013
app pub date -
Oct 18, 2012
filing date -
Dec 8, 2011
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Abstract
The present invention discloses a new type of high selectivity UV-cross-linked tetrazole group functionalized polymer nanosieve (TZPIM) membranes, their preparation, as well as their use for gas and liquid separations. The UV-cross-linked TZPIM membrane showed more than 50% improvement in CO2/CH4 selectivity and more than 30% improvement in CO2/N2 selectivity compared to the uncross-linked TZPIM membrane for CO2/CH4 and CO2/N2 separations, respectively.
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