A Study on the Preparation of Metal-Ion Separation Membrane with Hydrophilic Polyphosphazenes

친수성 포스파젠 고분자를 이용한 금속 이온 분리막 제조에 관한 연구

  • Kwon, Suk-Ky (Department of Chemical System Engineering, Hongik University) ;
  • Lee, Byung-Chul (Department of Chemical System Engineering, Hongik University)
  • 권석기 (홍익대학교 과학기술대학 화학시스템공학과) ;
  • 이병철 (홍익대학교 과학기술대학 화학시스템공학과)
  • Received : 1999.01.06
  • Accepted : 1999.04.14
  • Published : 1999.05.10

Abstract

Hydrophilic polyphosphazenes were synthesized from hydrophobic polyphosphazenes by adding methoxyethylenoxy side chains and cast by dip-coating method into membranes supported on porous polypropylene mesh filter sheet for metal separation testing. A solution of $Cr^{3+},\;Co^{2+},\;Mn^{2+}$ nitrates was used in diffusion experiments which were conducted from $25^{\circ}C$ to $60^{\circ}C$. lt was found that the ion transport properties were increased as the repeating number of ethylenoxy side chain increased. Membrane from trifluoroethoxy methoxyethoxyethoxyethoxy co-substituted polyphosphazenes was found to separate $Cr^{3+}$ ion from $Mn^{2-}$ and $Co^{2+}$ ions with separation factor of 4.5 at $60^{\circ}C$.

Keywords

Polyphosphazenes;Membrane;Metal-Ion;Separation

Acknowledgement

Supported by : 교육부

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