najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2019-10-3-282-288najo-561Research ArticleCHEMISTRY AND MATERIAL SCIENCEХИМИЯ И МАТЕРИАЛОВЕДЕНИЕComposite membranes based on geometrically constrained PIM-1 for dehumidification of gas mixturesChernovaE. A.

Leninskiye Gory, Moscow, 119991

wellastra@gmail.comRoslyakovI. V.

Leninskiye Gory, Moscow, 119991

DorofeevS. G.

Leninskiye Gory, Moscow, 119991

LukashinA. V.

Leninskiye Gory, Moscow, 119991

alexey.lukashin@gmail.comLomonosov Moscow State UniversityRussian Federation201907082025103282288Copyright © Chernova E.A., Roslyakov I.V., Dorofeev S.G., Lukashin A.V., 20252025Chernova E.A., Roslyakov I.V., Dorofeev S.G., Lukashin A.V.Chernova E.A., Roslyakov I.V., Dorofeev S.G., Lukashin A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/561

Composite membranes based on polymer with intrinsic microporosity (PIM-1) confined in the pores of porous anodic alumina (AAO) supports were prepared by spin-coating method under vacuum suction. Water permeance of the membranes was measured at humidities ranging from 10 to 70 %. High permeance towards water vapors reaching the value of ∼ 13700 l/(m2 ·bar·h) coupled with the H2O/N2 selectivity of 1400 was observed at the humidity of 70 % for composite membranes due to the condensation in nanopores of polymer and anodic alumina channels. The obtained selectivity exceeds strongly that of bulk PIM-1 due to confinement of polymer chains mobility in AAO channels. The water vapor sorption capacity for composite membranes exceeds 7 % being governed both by condensation in polymer micropores and anodic alumina channels. Physical ageing of the membranes was monitored for a period of 6 months and then the membranes were subjected to activation in methanol. It was established that physical ageing substantially reduces the water permeance but activation in methanol allows one to partially rejuvenate water transport performance.

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The authors declare that there are no conflicts of interest present.