Oxygen dissolution and transport in cobaltporphyrin‐bound organophosphazene membranes

Hiroyuki Nishide, H. Kawakami, S. Nishihara, K. Tsuda, T. Suzuki, E. Tsuchida

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Abstract

Rubbery poly(organophosphazene)s were synthesized, and were combined with cobaltporphyrin (CoP) which binds molecular oxygen rapidly and reversibly. The apparent oxygen‐binding equilibrium constant (Kapp) is in proportion to the physical solubility coefficient of oxygen in the polymer, although the reduced equilibrium and thermodynamic parameters are not dependent on the polymer matrix species. Diffusivity of oxygen via the fixed CoP(DC) is enhanced for poly(organophosphazene) membranes with a larger oxygen diffusion constant. Poly(organophosphazene) membranes with both a large Kapp and DC yield high oxygen permeability.

Original languageEnglish
Pages (from-to)17-20
Number of pages4
JournalPolymers for Advanced Technologies
Volume4
Issue number1
DOIs
Publication statusPublished - 1993

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Keywords

  • Cobaltporphyrin
  • Facilitated transport
  • Oxygen‐separating membrane
  • Poly(organophosphazene)

ASJC Scopus subject areas

  • Polymers and Plastics

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