Abstract
A membrane having both a selective oxygen-absorbing capability and a long operational lifetime was prepared by complexing picket-fence cobaltporphyrin (CoP) with poly(vinylimidazole-co-fluoropentyl methacrylate) (FIm) as a polymer-ligand. The oxygen-binding affinity of the CoP complexed in the membrane was larger than that in the solution state. Oxygen permeation was selectively facilitated with the CoP fixed in the membrane, and a high oxygen permeability (10-7 cm3(STP) cm cm-2 s-1 cmHg-1) maintaining the permselectivity was observed. The lifetime of the CoP as an oxygen-carrier was prolonged by complexing with FIm even in a humid atmosphere (half-lifetime >200 days) due to the hydrophobic property of the FIm copolymer.
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-d[Co]/dt=k’[Co][H2O], under a certain humidity, [H2O] is constant. Supposing k=k’[H2O], then, ln [Co]/[Co]0=kt, τ=ln2/k.
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Shentu, B., Shinohara, H. & Nishide, H. High Oxygen Permeation and Persistent Oxygen-Carrying in a Poly(vinylimidazole-co-fluoroalkyl methacrylate)-Cobaltporphyrin Membrane. Polym J 33, 807–811 (2001). https://doi.org/10.1295/polymj.33.807
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DOI: https://doi.org/10.1295/polymj.33.807
