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    Determining liquid–liquid interfacial tension from a submerged meniscus

    Access Status
    Fulltext not available
    Authors
    Hyde, A.
    Phan, Chi
    Ingram, Gordon
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Hyde, A. and Phan, C. and Ingram, G. 2014. Determining liquid–liquid interfacial tension from a submerged meniscus. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 459: pp. 267-273.
    Source Title
    Colloids and Surfaces A: Physicochemical and Engineering Aspects
    DOI
    10.1016/j.colsurfa.2014.07.016
    ISSN
    0927-7757
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/23027
    Collection
    • Curtin Research Publications
    Abstract

    Liquid–liquid interfacial tension plays a crucial role in multiphase systems in the chemical industry. The available measurement methods for liquid–liquid interfacial tension are poorly suited to low bond number systems, which are often found in industrial processes. This study developed and verified anew method of calculating the interfacial tension of liquid–liquid systems by using the “submerged holm” meniscus. The holm meridian was experimentally formed around a solid object submerged at the interface. A program was developed in MATLAB to calculate the interfacial tension from the submerged holm meridian. The interfacial tension calculated by the new method was found to be consistent with available data for multiple oil–water systems. This is the first time the submerged holm meniscus has been used successfully for determining interfacial tension. More importantly, the method is applicable to liquid–liquid systems with a small density difference between the two phases. As a demonstration, the interfacial tension of silicone oil (1000 cP) – water was measured, where the difference in density was less than 30 kg/m3 (3%). The method is potentially suitable for processes involving hazardous or unstable chemicals, elevated pressure or temperature.

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