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    Micelle and Surface Tension of Double-Chain Cationic Surfactants

    Access Status
    Fulltext not available
    Authors
    Phan, Chi
    Yusa, S.
    Honda, T.
    Sharker, K.
    Hyde, A.
    Nguyen, C.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Phan, C. and Yusa, S. and Honda, T. and Sharker, K. and Hyde, A. and Nguyen, C. 2018. Micelle and Surface Tension of Double-Chain Cationic Surfactants. ACS Omega. 3 (9): pp. 10907-10911.
    Source Title
    ACS Omega
    DOI
    10.1021/acsomega.8b01667
    ISSN
    2470-1343
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/71561
    Collection
    • Curtin Research Publications
    Abstract

    Since the early 20th century, the slightly disparate measurements of a surfactant's critical micelle concentration, via either surface tension or electrical conductivity, have been assumed one and the same. As a consequence, the possibility that micelles can adsorb at the air/water surface has been disregarded and has led to some abnormalities in the literature that remain as yet unresolved. In this paper, we closely examined the two critical concentrations for a double-chain cationic surfactant. We confirmed that the two concentrations represent two different physical phenomena. Furthermore, the results verified the existence of surface micelles, which are different from the bulk micelles. The formation of the surface micelles can be explained by the structural changes of the adsorption layer, which was also corroborated by molecular simulations. The findings open new challenges to examine the surface adsorption, which offers new insights into the molecular levels.

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