AFM observation of small surface pores of hollow-fiber dialysis membrane using highly sharpened probe

Masayo Hayama, Fukashi Kohori, Kiyotaka Sakai

    Research output: Contribution to journalArticle

    39 Citations (Scopus)

    Abstract

    Determining pore size distribution is important for characterization of a dialysis membrane. However, conventional microscopic techniques cannot present a sufficient image for determining pore size distribution. In the present study, tapping mode atomic force microscopy (TMAFM) has been shown to be a powerful tool for observing and evaluating the small surface pores of a hollow-fiber dialysis membrane. Sample fixing technique described below and a highly sharpened probe have made it possible to observe small pores on a soft and undulant surface of a dialysis membrane. This is the first time that clear TMAFM images of surface pores of a hollow-fiber dialysis membrane at such high resolution have been presented. Pore diameter was determined by image analysis. Average pore diameter of APS-150 (Asahi-kasei, Japan) determined by TMAFM was compared with those by field emission scanning electron microscopy (FESEM) and by the Hagen-Poiseuille equation. The average pore diameter of APS-150 determined by TMAFM was slightly higher than that by FESEM. The average pore diameter determined by the Hagen-Poiseuille equation was intermediate between values for that of inside and outside surfaces determined by TMAFM.

    Original languageEnglish
    Pages (from-to)243-249
    Number of pages7
    JournalJournal of Membrane Science
    Volume197
    Issue number1-2
    DOIs
    Publication statusPublished - 2002 Mar 15

    Fingerprint

    Dialysis membranes
    dialysis
    Atomic Force Microscopy
    Dialysis
    hollow
    Atomic force microscopy
    Observation
    atomic force microscopy
    membranes
    porosity
    fibers
    Membranes
    Fibers
    probes
    Field emission
    Electron Scanning Microscopy
    Pore size
    Scanning electron microscopy
    field emission
    Image analysis

    Keywords

    • Highly sharpened probe
    • Hollow-fiber dialysis membrane
    • Surface pores
    • Tapping mode atomic force microscopy

    ASJC Scopus subject areas

    • Filtration and Separation
    • Polymers and Plastics

    Cite this

    AFM observation of small surface pores of hollow-fiber dialysis membrane using highly sharpened probe. / Hayama, Masayo; Kohori, Fukashi; Sakai, Kiyotaka.

    In: Journal of Membrane Science, Vol. 197, No. 1-2, 15.03.2002, p. 243-249.

    Research output: Contribution to journalArticle

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