title: Enhanced gas separation factors of microporous polymer constrained in the channels of anodic alumina membranes.
abstract: New composite membranes based on porous anodic alumina films and polymer of intrinsic microporosity (PIM-1) have been prepared using a spin-coating technique. According to scanning electron microscopy, partial penetration of polymer into the pores of alumina supports takes place giving rise to selective polymeric layers with fiber-like microstructure. Geometric confinement of rigid PIM-1 in the channels of anodic alumina causes reduction of small-scale mobility in polymeric chains. As a result, transport of permanent gases, such as CH4, becomes significantly hindered across composite membranes. Contrary, the transport of condensable gases (CO2, С4H10), did not significantly suffer from the confinement due to high solubility in the polymer matrix. This strategy enables enhancement of selectivity towards CO2 and C4H10 without significant loss of the membrane performance and seems to be prospective for drain and sweetening of natural gas.
authors: Department of Materials Science, Lomonosov Moscow State University, Moscow, 119991, Russia.
authors: Ekaterina
authors: E
authors: Chernova
authors: Department of Materials Science, Lomonosov Moscow State University, Moscow, 119991, Russia.
authors: Dmitrii
authors: D
authors: Petukhov
authors: Department of Materials Science, Lomonosov Moscow State University, Moscow, 119991, Russia.|Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russia.
authors: Olga
authors: O
authors: Boytsova
authors: A. V. Topchiev Institute of Petrochemical Synthesis (TIPS) Russian Academy of Sciences, Moscow, 119991, Russia.
authors: Alexander
authors: A
authors: Alentiev
authors: School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
authors: Peter
authors: P
authors: Budd
authors: A. V. Topchiev Institute of Petrochemical Synthesis (TIPS) Russian Academy of Sciences, Moscow, 119991, Russia.
authors: Yuri
authors: Y
authors: Yampolskii
authors: Department of Materials Science, Lomonosov Moscow State University, Moscow, 119991, Russia.
authors: Andrei
authors: A
authors: Eliseev