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Effects of aging on poly(1‐trimethylsilyl‐1‐propyne) membranes irradiated with vacuum ultraviolet radiation for gas separation
Author(s) -
Yoshioka Tetsuro,
Miyashita Yoshiki,
Motoo Taichi,
Saito Kentaro,
Nagai Kazukiyo
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45973
Subject(s) - membrane , irradiation , propyne , trimethylsilyl , methane , gas separation , materials science , permeability (electromagnetism) , chemistry , ultraviolet , nitrogen , analytical chemistry (journal) , polymer chemistry , photochemistry , chromatography , organic chemistry , biochemistry , physics , nuclear physics , optoelectronics
In this study, we investigated the effects of physical aging on the surface and gas‐transport properties of highly gas permeable poly(1‐trimethylsilyl‐1‐propyne) membranes irradiated with vacuum ultraviolet (VUV) radiation. VUV excimer lamp irradiation was performed on one side of the membrane for 6 or 60 min. The gas permeabilities for carbon dioxide (CO 2 ) and nitrogen (N 2 ) were determined through a volumetric measurement method at 23 °C. The gas permeabilities for CO 2 and N 2 increased temporarily at 7 days after 6 and 60 min of VUV irradiation of the membranes. The change in the gas permeability for N 2 was more remarkable than that for CO 2 . These changes were related to the CO or SiO x ratio. The CO ratio was related to the gas permeability of the membranes VUV‐irradiated for 6 min, whereas the SiO x ratio was related to the gas permeability of the membranes VUV‐irradiated for 60 min. These changes affected the gas selectivities of the membranes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45973.