| abstract |
(57) Abstract: Disclosed are novel fluorinated aromatic polyimide, polyamide and polyamide-imide gas separation membranes and methods of using the membranes to separate one or more gases from a gaseous mixture. ing. Polyimides, polyamides and polyamide-imides have the formula: Wherein Ar 'is an aromatic diol moiety and X Are independently fluorinated alkyl groups having 1 to 6 carbon atoms, most preferably trifluoromethyl groups, and m is 1 to 4 Is an integer, preferably 1, and is an integer]. The gas separation membrane prepared from the polyimide, polyamide and polyamide-imide materials of the present invention has excellent gas permeation rate and selectivity to one gas over other gases in a multi-component gas mixture. Have a balance. |