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Gas transport properties of asymmetric polyimide membranes prepared by plasma‐based ion implantation
Author(s) -
Tezuka Teppei,
Kobayashi Tomohiro,
Muraoka Daigo,
Nagaoka Shoji,
Suzuki Yoshiaki,
Kawakami Hiroyoshi
Publication year - 2009
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1352
Subject(s) - permeance , polyimide , membrane , permeation , materials science , selectivity , ion implantation , ion , plasma , chemical engineering , phase inversion , polymer chemistry , layer (electronics) , analytical chemistry (journal) , chromatography , nanotechnology , chemistry , organic chemistry , catalysis , biochemistry , physics , quantum mechanics , engineering
In this study, we report the gas permeance and selectivity of the asymmetric polyimide membrane prepared by plasma‐based ion implantation (PBII). The asymmetric polyimide membranes were prepared using a dry–wet phase inversion process, and the surface skin layer on the membrane was implantated by He ions at 2.5 keV. The asymmetric membranes treated by PBII were measured using a high vacuum apparatus with a Baratron absolute pressure gauge at 76 cmHg and 35°C. The (O 2 /N 2 ) and (CO 2 /CH 4 ) selectivities in the He + ‐implanted asymmetric membrane at 60 sec resulted in 1.5 and 1.8 time increases, respectively, when compared to those of the asymmetric membrane before PBII. On the other hand, the O 2 and CO 2 permeances in the asymmetric membrane after PBII decreased with an increase in the He + treatment time. In this paper, we addressed, for the first time, the gas permeation behavior of the asymmetric polyimide membranes prepared by PBII. Copyright © 2009 John Wiley & Sons, Ltd.
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