Monodispersed nano-bubbles generated from porous glass membrane and bubble size control

Masato Kukizaki, Tadao Nakashima, Jun Song, Yasuaki Kohama

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    The authors found that monodispersed bubbles with a mean diameter of less than 1 μm (monodispersed nano-bubbles) were generated from a porous glass membrane with uniform size-controlled pores. The size of the bubbles generated could be controlled by varying the pore size of the membrane used. When air was permeated through a hydrophilic tubular membrane at a right-angle to the flow of pure water containing sodium dodecyl sulfate (SDS) of 1.7 mol·m -3 as a surfactant, and then dispersed into the water phase flowing on the inner side of the membrane, monodispersed bubbles were generated in the pressure region that exceeded the bubble point pressure. Under such conditions, nano-bubbles with a mean diameter of 0.720 μm were generated from a membrane with a mean pore diameter of 0.084 μm. The mean diameter of the bubbles generated was proportional to the mean pore diameter of the membrane used. By contrast, bubbles with a broad size distribution were generated from a hydrophobic membrane, and bubble point pressure was not observed. When the SDS concentration was lower than 1.7 mol·m-3, polydispersed bubbles were generated from even the hydrophilic membrane.

    Original languageEnglish
    Pages (from-to)654-660
    Number of pages7
    Journalkagaku kogaku ronbunshu
    Volume30
    Issue number5
    DOIs
    Publication statusPublished - 2004 Sep 1

    Keywords

    • Bubble Point Pressure
    • Bubble Size Control
    • Monodispersed Nano-Bubble
    • Porous Glass Membrane
    • Surfactant

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)

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