Wettability: thermodynamic relationships between vapour adsorption and wetting.

L.J.M. Schlangen, L.K. Koopal, M.A. Cohen Stuart, J. Lyklema

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    Starting from the Gibbs adsorption equation the thermodynamic relationships between vapour adsorption and wetting are derived. The surface pressure SV of a film on a solid formed by vapour adsorption is calculated from the vapour adsorption isotherm. The surface pressure is related to the spreading tension and to the contact angle in the vapour—liquid—solid system. The surface pressure at the saturated vapour pressure determines, together with the interfacial tension of the liquid, the difference between the interfacial tension of a solid and a solid—liquid interface. Knowledge of the value of SV for two different immiscible liquids allows the prediction of the wettability in a liquid—liquid—solid system. The procedure is illustrated for the water—octane—silica system. The value of the spreading tension obtained from the individual adsorption isotherms indicates that the silica surface has a strong preference to be water wet.
    Original languageEnglish
    Pages (from-to)157-167
    JournalColloids and Surfaces. A: Physicochemical and Engineering Aspects
    Volume89
    DOIs
    Publication statusPublished - 1994

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    wettability
    wetting
    Wetting
    Vapors
    Thermodynamics
    vapors
    Adsorption
    thermodynamics
    adsorption
    Adsorption isotherms
    Surface tension
    interfacial tension
    isotherms
    Gibbs adsorption equation
    Liquids
    liquids
    Vapor pressure
    Silicon Dioxide
    vapor pressure
    Contact angle

    Cite this

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    title = "Wettability: thermodynamic relationships between vapour adsorption and wetting.",
    abstract = "Starting from the Gibbs adsorption equation the thermodynamic relationships between vapour adsorption and wetting are derived. The surface pressure SV of a film on a solid formed by vapour adsorption is calculated from the vapour adsorption isotherm. The surface pressure is related to the spreading tension and to the contact angle in the vapour—liquid—solid system. The surface pressure at the saturated vapour pressure determines, together with the interfacial tension of the liquid, the difference between the interfacial tension of a solid and a solid—liquid interface. Knowledge of the value of SV for two different immiscible liquids allows the prediction of the wettability in a liquid—liquid—solid system. The procedure is illustrated for the water—octane—silica system. The value of the spreading tension obtained from the individual adsorption isotherms indicates that the silica surface has a strong preference to be water wet.",
    author = "L.J.M. Schlangen and L.K. Koopal and {Cohen Stuart}, M.A. and J. Lyklema",
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    Wettability: thermodynamic relationships between vapour adsorption and wetting. / Schlangen, L.J.M.; Koopal, L.K.; Cohen Stuart, M.A.; Lyklema, J.

    In: Colloids and Surfaces. A: Physicochemical and Engineering Aspects, Vol. 89, 1994, p. 157-167.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Wettability: thermodynamic relationships between vapour adsorption and wetting.

    AU - Schlangen, L.J.M.

    AU - Koopal, L.K.

    AU - Cohen Stuart, M.A.

    AU - Lyklema, J.

    PY - 1994

    Y1 - 1994

    N2 - Starting from the Gibbs adsorption equation the thermodynamic relationships between vapour adsorption and wetting are derived. The surface pressure SV of a film on a solid formed by vapour adsorption is calculated from the vapour adsorption isotherm. The surface pressure is related to the spreading tension and to the contact angle in the vapour—liquid—solid system. The surface pressure at the saturated vapour pressure determines, together with the interfacial tension of the liquid, the difference between the interfacial tension of a solid and a solid—liquid interface. Knowledge of the value of SV for two different immiscible liquids allows the prediction of the wettability in a liquid—liquid—solid system. The procedure is illustrated for the water—octane—silica system. The value of the spreading tension obtained from the individual adsorption isotherms indicates that the silica surface has a strong preference to be water wet.

    AB - Starting from the Gibbs adsorption equation the thermodynamic relationships between vapour adsorption and wetting are derived. The surface pressure SV of a film on a solid formed by vapour adsorption is calculated from the vapour adsorption isotherm. The surface pressure is related to the spreading tension and to the contact angle in the vapour—liquid—solid system. The surface pressure at the saturated vapour pressure determines, together with the interfacial tension of the liquid, the difference between the interfacial tension of a solid and a solid—liquid interface. Knowledge of the value of SV for two different immiscible liquids allows the prediction of the wettability in a liquid—liquid—solid system. The procedure is illustrated for the water—octane—silica system. The value of the spreading tension obtained from the individual adsorption isotherms indicates that the silica surface has a strong preference to be water wet.

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    DO - 10.1016/0927-7757(94)80115-0

    M3 - Article

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    JO - Colloids and Surfaces. A: Physicochemical and Engineering Aspects

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    SN - 0927-7757

    ER -