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Gas separation properties of ultra-thin films based on fully cyclized polyimides |
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| Authors: | Miroslav Marek Eduard Brynda Zbyn k Pientka Libu&#x;e Broov |
| Abstract: | Fully cyclized polyimides based on octadecyl- or hexadecyl 3,5-diaminobenzoate and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride or 4,4′-oxydiphthalic anhydride were synthesized and deposited by the Langmuir-Schaefer technique onto a poly(1-trimethylsilylprop-1-yne) support. Composite membranes thus prepared show selective gas permeation for N2, O2, CO2, H2 with permeation rates in the range of 10?5 to 10?7 cm3 (STP)/(cm2 · s · cmHg). |
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