Impregnation of an Acidic Extractant Cyanex 272 to the Alkylamino Group and Alkylthiol Group Introduced into the Polymer Chain Grafted onto a Porous Membrane

  • Sawaki Kenta
    Department of Applied Chemistry and Biotechnology, Chiba University
  • Domon Sayaka
    Department of Applied Chemistry and Biotechnology, Chiba University
  • Asai Shiho
    Department of Applied Chemistry and Biotechnology, Chiba University Nuclear Energy Basic Engineering Research Sector, Japan Atomic Energy Agency
  • Watanabe Kazuo
    Nuclear Energy Basic Engineering Research Sector, Japan Atomic Energy Agency
  • Sugo Takanobu
    Environment Purification Research Institute Co.
  • Saito Kyoichi
    Department of Applied Chemistry and Biotechnology, Chiba University

Bibliographic Information

Other Title
  • アルキルアミノ基およびアルカンチオール基を導入したグラフト鎖 搭載多孔性膜への酸性抽出試薬Cyanex 272 の担持
  • アルキルアミノキ オヨビ アルカンチオールキ オ ドウニュウシタ グラフトサ トウサイ タコウセイ マク エノ サンセイ チュウシュツ シヤク Cyanex 272 ノ タンジ

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Abstract

An acid extractant, di (2, 4, 4-trimethylpentyl) phosphinic acid (Cyanex 272), was impregnated to the hydrophobic ligand of a polymer chain grafted onto the pore surface of a porous membrane of a hollow-fiber form. The hydrophobic ligand was introduced by a reaction of an epoxy group of the poly-glycidyl methacrylate, which was appended to the porous membrane by radiation-induced graft polymerization, with n-alkylamine (CnH2n+1NH2) or n-octadecanethiol (C18H37SH). The carbon number of the n-alkylamino group ranged from 0 to 18. The amount of Cyanex 272 impregnated onto the porous membrane increased with an increasing density of the n-octadecylamino group, whereas the amount of impregnated Cyanex 272 was constant irrespective of the density of the n-octadecanethiol group. No leakage of Cyanex 272 impregnated to the n-dodecylamino or n-octadecylamino group of the graft chain was observed. The capturing of zinc ions by the Cyanex 272-impregnated porous hollow-fiber membrane was achieved during the permeation of a zinc chloride solution through the pores of the porous membrane. The equilibrium binding capacity of the Cyanex 272-impregnated porous hollow-fiber membrane for zinc ions was 0.37 mol/kg of the GMA-grafted membrane.

Journal

  • MEMBRANE

    MEMBRANE 32 (2), 109-115, 2007

    THE MEMBRANE SOCIETY OF JAPAN

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