Article
  • Preparation of Polysulfone Membrane Containing an Inorganic Fluor
  • Han MJ, Nam ST, Lee SK, Choi HS, Park YT
  • 무기 Fluor 하침 Polysulfone 고체막 제조에 관한 연구
  • 한명진, 남석태, 이수각, 최호상, 박영태
Abstract
Polysulfone(PSF) membranes were prepared by coagulating a PSF solution film with or without addition of water. when a solution film was solidified by evaporation of solvent, polymer molecules in the film were precipitated by vitrification. With addition of water, the cast solution was demixed by the liquid-liquid phase separation due to the nucleation of polymer-lean phase. The growth of the separated two phases continued until the polymer-rich phase vitrified. The polymer-rich phase could be demixed again before precipitation. Solid membranes for measuring the nucleotides were prepared from a casting solution including GAYS, an inorganic fluor. In the membrane solidified via vitrification by the solvent evaporation, GAYS particles were dispersed in the solidified polymer matrix. On the contrary, when the solidification process involved the liquid-liquid phase separation due to the nucleation of the polymer-lean phase, GAYS were separated from the polymer matrix and retained in the polymer-lean phase.

비용매인 물의 첨가 또는 용매의 증발에 의해 polysulfone (PSF) 용액 필름이 응고되어 고체막으로 변형되었다. 용매의 증발로 형성된 막은 고분자 농도의 증가에 따른 유리화에 의해 고체화되었으며, 비용매인 물의 첨가에 의해 제조된 막은 용액필름의 고체화 과정에서 액체-액체 상분리 과정을 포함하였다. 상분리에 의해 형성된 polymer-rich 상과 polymer-lean 상은 전자가 유리화에 의해 침지될 때까지 성장하였다. 한편, 액체-액체 상분리가 된 용액필름은 고체로 침지되기에 앞서 재차 상분리가 유도될 수 있었다. PSF 용액 (18w/v%)에 무기물인 cerium activated yttrium silicate (CAYS)가 첨가되어 제막되었을 때, 용매 증발을 통한 유리화로 형성된 막에서는 CAYS들이 PSF에 의해 둘러 싸여졌으나, 액체-액체 상분리를 통해 고체화된 막에서는 CAYS 분말들이 PSF 구조로부터 격리되어 polymer-lean 상에 집결하였다.

Keywords: Membrane; Vitrification; Liquid-Liquid Phase Separation; Coagulation

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1997; 21(3): 410-418

    Published online May 25, 1997