Gas permeation of LC films observed by smectic bubble expansion

Y. Ishii, Yuka Tabe

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Gas permeation through liquid crystal (LC) films was examined using hemispherical smectic bubbles. A smectic bubble, when the inside and the outside are filled with different gases, should expand or shrink toward the quasi-equilibrium state, where the influx and efflux caused by osmotic pressure are balanced. Deriving a simple formula that directly converts the quasi-equilibrated bubble radius to the gas permeation, we determined the absolute permeability coefficients of 8 simple gases through the smectic bubble. The permeability was distributed in such a wide range that carbon-dioxide had more than 20 times larger value than nitrogen, the dependence of which on the gas species was mostly dominated by their solubility into the LCs. Dividing the measured permeability by the calculated solubility, we obtained the diffusion constants as well, yet whose magnitude and the dependence on the solute size could not be explained by either conventional continuum theories or microscopic diffusion models. In order to describe the diffusion of small solutes in the liquid solvent composed of large molecules, a new theoretical framework may be necessary.

    Original languageEnglish
    Pages (from-to)257-264
    Number of pages8
    JournalEuropean Physical Journal E
    Volume30
    Issue number3
    DOIs
    Publication statusPublished - 2009 Nov

    Fingerprint

    Liquid Crystals
    Bubbles (in fluids)
    Permeation
    Liquid crystals
    bubbles
    Gases
    liquid crystals
    expansion
    Permeability
    permeability
    gases
    Solubility
    solutes
    solubility
    efflux
    osmosis
    Osmotic Pressure
    Hydraulic conductivity
    Carbon Dioxide
    carbon dioxide

    ASJC Scopus subject areas

    • Materials Science(all)
    • Surfaces and Interfaces
    • Chemistry(all)
    • Biophysics
    • Biotechnology

    Cite this

    Gas permeation of LC films observed by smectic bubble expansion. / Ishii, Y.; Tabe, Yuka.

    In: European Physical Journal E, Vol. 30, No. 3, 11.2009, p. 257-264.

    Research output: Contribution to journalArticle

    @article{14aac7679bbb44a0b36e064d66670896,
    title = "Gas permeation of LC films observed by smectic bubble expansion",
    abstract = "Gas permeation through liquid crystal (LC) films was examined using hemispherical smectic bubbles. A smectic bubble, when the inside and the outside are filled with different gases, should expand or shrink toward the quasi-equilibrium state, where the influx and efflux caused by osmotic pressure are balanced. Deriving a simple formula that directly converts the quasi-equilibrated bubble radius to the gas permeation, we determined the absolute permeability coefficients of 8 simple gases through the smectic bubble. The permeability was distributed in such a wide range that carbon-dioxide had more than 20 times larger value than nitrogen, the dependence of which on the gas species was mostly dominated by their solubility into the LCs. Dividing the measured permeability by the calculated solubility, we obtained the diffusion constants as well, yet whose magnitude and the dependence on the solute size could not be explained by either conventional continuum theories or microscopic diffusion models. In order to describe the diffusion of small solutes in the liquid solvent composed of large molecules, a new theoretical framework may be necessary.",
    author = "Y. Ishii and Yuka Tabe",
    year = "2009",
    month = "11",
    doi = "10.1140/epje/i2009-10517-4",
    language = "English",
    volume = "30",
    pages = "257--264",
    journal = "European Physical Journal E",
    issn = "1292-8941",
    publisher = "Springer New York",
    number = "3",

    }

    TY - JOUR

    T1 - Gas permeation of LC films observed by smectic bubble expansion

    AU - Ishii, Y.

    AU - Tabe, Yuka

    PY - 2009/11

    Y1 - 2009/11

    N2 - Gas permeation through liquid crystal (LC) films was examined using hemispherical smectic bubbles. A smectic bubble, when the inside and the outside are filled with different gases, should expand or shrink toward the quasi-equilibrium state, where the influx and efflux caused by osmotic pressure are balanced. Deriving a simple formula that directly converts the quasi-equilibrated bubble radius to the gas permeation, we determined the absolute permeability coefficients of 8 simple gases through the smectic bubble. The permeability was distributed in such a wide range that carbon-dioxide had more than 20 times larger value than nitrogen, the dependence of which on the gas species was mostly dominated by their solubility into the LCs. Dividing the measured permeability by the calculated solubility, we obtained the diffusion constants as well, yet whose magnitude and the dependence on the solute size could not be explained by either conventional continuum theories or microscopic diffusion models. In order to describe the diffusion of small solutes in the liquid solvent composed of large molecules, a new theoretical framework may be necessary.

    AB - Gas permeation through liquid crystal (LC) films was examined using hemispherical smectic bubbles. A smectic bubble, when the inside and the outside are filled with different gases, should expand or shrink toward the quasi-equilibrium state, where the influx and efflux caused by osmotic pressure are balanced. Deriving a simple formula that directly converts the quasi-equilibrated bubble radius to the gas permeation, we determined the absolute permeability coefficients of 8 simple gases through the smectic bubble. The permeability was distributed in such a wide range that carbon-dioxide had more than 20 times larger value than nitrogen, the dependence of which on the gas species was mostly dominated by their solubility into the LCs. Dividing the measured permeability by the calculated solubility, we obtained the diffusion constants as well, yet whose magnitude and the dependence on the solute size could not be explained by either conventional continuum theories or microscopic diffusion models. In order to describe the diffusion of small solutes in the liquid solvent composed of large molecules, a new theoretical framework may be necessary.

    UR - http://www.scopus.com/inward/record.url?scp=72549089379&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=72549089379&partnerID=8YFLogxK

    U2 - 10.1140/epje/i2009-10517-4

    DO - 10.1140/epje/i2009-10517-4

    M3 - Article

    C2 - 19816725

    AN - SCOPUS:72549089379

    VL - 30

    SP - 257

    EP - 264

    JO - European Physical Journal E

    JF - European Physical Journal E

    SN - 1292-8941

    IS - 3

    ER -