Highly selective oxygen permeation through a poly(vinylidene dichloride)-cobalt porphyrin membrane: Hopping transport of oxygen via the fixed cobalt porphyrin carrier

Hiroyuki Nishide*, Yukihiro Tsukahara, Eishun Tsuchida

*この研究の対応する著者

研究成果: Article査読

61 被引用数 (Scopus)

抄録

A combination membrane having both gas barrier properties and selective oxygen-absorbing and -carrying capability was prepared by complexing poly(vinylidene dichloride-co-vinylimidazole) and meso-tetrakis-(α,α,α,α-o-pivalamidophenyl) porphyrinatocobalt (CoP). The vinylidene dichloride copolymer was selected because of its low physical gas permeability and its dense and tough thin-membrane formability even after the CoP complexation. Oxygen permeation was selectively facilitated with the CoP carrier fixed in the membrane, and high oxygen permselectivity (facilitation factor > 25, oxygen/nitrogen permselectivity > 100, permeability 10-10 cm3 (STP) cm cm-2 s-1 cmHg-1) was observed, e.g., for the membrane containing > 20 wt % CoP at an upstream oxygen partial pressure of 0.5 cmHg. The facilitated oxygen transport was properly analyzed by a dual-mode model to give permeation parameters of the membrane such as the postulated diffusion coefficient of oxygen hopping via the fixed CoP carrier (DC). DC was inversely proportional to the average distance between the CoP carrier sites.

本文言語English
ページ(範囲)8766-8770
ページ数5
ジャーナルJournal of Physical Chemistry B
102
44
出版ステータスPublished - 1998 10月 29

ASJC Scopus subject areas

  • 物理化学および理論化学

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