Applicability of Pore Characterization by Gas Permeability for Porous Cellulose-Acetate Membrane

DOI Web Site 2 Citations
  • MANABE Sei-ichi
    Textile Research Laboratory, Asahi Chemical Industry Co. Ltd.
  • KAMIDE Kenji
    Textile Research Laboratory, Asahi Chemical Industry Co. Ltd.
  • NOHMI Takashi
    Department of Polymer Chemistry, Faculty of Engineering, Tokyo Institute of Technology
  • KAWAI Toru
    Department of Polymer Chemistry, Faculty of Engineering, Tokyo Institute of Technology

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Other Title
  • 多孔質高分子膜の気体透過性　Ｖ　　気体透過性を利用した酢酸セルロース多孔膜のキャラクタリゼーション法の適用限界
  • キタイ トウカセイ オ リヨウシタ サクサン セルロース タコウ マク ノ キ

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Description

The applicability of the pore characterization by gas permeability (GP) was examined for celluloseacetate membranes prepared by micro-phase separation. The mean pore radii obtained from GP were compared with those by scanning electron microscopy (SEM) and filtration rate method.<BR>For 4th mean radius r4>19 nm, GP is applicable to estimate ri (i=3 or 4) values, which agree with those obtained by SEM, but for r4<0.3 nm, GP gives erroneous results. Pore size distribution obtained from GP does not agree with that by SEM. The relation between the porosity obtained from the apparent density and that by SEM satisfies an equation derived theoretically for a spherical pore model. Since porosity value depends on the measuring method, r3 and (r3·r4) 1/2 obtained from GP varies with the porosity value.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 37 (6), 405-412, 1980

    The Society of Polymer Science, Japan

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