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  1. Artikel ; Online: Influence of Surfactant Concentration on Spontaneous Emulsification Kinetics.

    Toor, Ritu / Denoyel, Renaud / Liggieri, Libero / Schmitt, Murielle / Antoni, Mickaël

    Langmuir : the ACS journal of surfaces and colloids

    2022  Band 38, Heft 38, Seite(n) 11521–11528

    Abstract: The kinetics of spontaneous emulsification is investigated on aqueous pendant drops in paraffin oil. Optical microscopy in transmission mode is used for high-spatial-resolution image recording. The influence of a lipophilic surfactant (Span 80) and two ... ...

    Abstract The kinetics of spontaneous emulsification is investigated on aqueous pendant drops in paraffin oil. Optical microscopy in transmission mode is used for high-spatial-resolution image recording. The influence of a lipophilic surfactant (Span 80) and two water-soluble surfactants (CTAB and SDS) is investigated. As time runs, the drop interface turns opaque due to the formation of microstructures associated with spontaneous emulsification. The time evolution of this phenomenon is shown to depend upon temperature and surfactant concentration, which leads to an overall shrinkage due to gradual water uptake and transport into paraffin oil. Spontaneous emulsification kinetics depends upon the chemical composition. Higher concentrations of Span 80 and CTAB (resp. SDS) are shown to promote (resp. hinder) water transport. This work provides new insights into the understanding of spontaneous emulsification when combining the properties of non-ionic and ionic surfactants.
    Sprache Englisch
    Erscheinungsdatum 2022-09-12
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.1c03443
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel: Influence of Surfactant Concentration on Spontaneous Emulsification Kinetics

    Toor, Ritu / Denoyel, Renaud / Liggieri, Libero / Schmitt, Murielle / Antoni, Mickaël

    Langmuir. 2022 Sept. 12, v. 38, no. 38

    2022  

    Abstract: The kinetics of spontaneous emulsification is investigated on aqueous pendant drops in paraffin oil. Optical microscopy in transmission mode is used for high-spatial-resolution image recording. The influence of a lipophilic surfactant (Span 80) and two ... ...

    Abstract The kinetics of spontaneous emulsification is investigated on aqueous pendant drops in paraffin oil. Optical microscopy in transmission mode is used for high-spatial-resolution image recording. The influence of a lipophilic surfactant (Span 80) and two water-soluble surfactants (CTAB and SDS) is investigated. As time runs, the drop interface turns opaque due to the formation of microstructures associated with spontaneous emulsification. The time evolution of this phenomenon is shown to depend upon temperature and surfactant concentration, which leads to an overall shrinkage due to gradual water uptake and transport into paraffin oil. Spontaneous emulsification kinetics depends upon the chemical composition. Higher concentrations of Span 80 and CTAB (resp. SDS) are shown to promote (resp. hinder) water transport. This work provides new insights into the understanding of spontaneous emulsification when combining the properties of non-ionic and ionic surfactants.
    Schlagwörter chemical composition ; emulsifying ; light microscopy ; lipophilicity ; oils ; shrinkage ; surfactants ; temperature ; water solubility ; water uptake
    Sprache Englisch
    Erscheinungsverlauf 2022-0912
    Umfang p. 11521-11528.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.1c03443
    Datenquelle NAL Katalog (AGRICOLA)

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  3. Artikel ; Online: Spontaneous Microstructure Formation at Water/Paraffin Oil Interfaces.

    Schmitt, Murielle / Toor, Ritu / Denoyel, Renaud / Antoni, Mickaël

    Langmuir : the ACS journal of surfaces and colloids

    2017  Band 33, Heft 49, Seite(n) 14011–14019

    Abstract: An experimental investigation of spontaneous emulsification is proposed with a water drop pendant in a paraffin oil (PO) solution loaded with a surfactant (SPAN80). Optical microscopy in a transmission mode is employed for high-spatial-resolution image ... ...

    Abstract An experimental investigation of spontaneous emulsification is proposed with a water drop pendant in a paraffin oil (PO) solution loaded with a surfactant (SPAN80). Optical microscopy in a transmission mode is employed for high-spatial-resolution image recording. The kinetics of spontaneous emulsification is studied. It is shown to generate a darkening of the drops because of interface modification with a characteristic time that depends upon the SPAN80 concentration. For low concentrations, spontaneous emulsification is slow and produces micrometer-sized droplets, whereas for large concentrations, it is fast and bush-like microstructures are observed. These microstructures increase in size and progressively invade the complete water/PO interfaces, detach, and finally migrate into the PO phase. This transport phenomenon withdraws water from the drops and leads to a gradual shrinking of their volume. At the end of this process, they appear as deformed objects surrounded by a loose membrane.
    Sprache Englisch
    Erscheinungsdatum 2017--12
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.7b02549
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  4. Artikel: Spontaneous Microstructure Formation at Water/Paraffin Oil Interfaces

    Schmitt, Murielle / Toor Ritu / Denoyel Renaud / Antoni Mickaël

    Langmuir. 2017 Dec. 12, v. 33, no. 49

    2017  

    Abstract: An experimental investigation of spontaneous emulsification is proposed with a water drop pendant in a paraffin oil (PO) solution loaded with a surfactant (SPAN80). Optical microscopy in a transmission mode is employed for high-spatial-resolution image ... ...

    Abstract An experimental investigation of spontaneous emulsification is proposed with a water drop pendant in a paraffin oil (PO) solution loaded with a surfactant (SPAN80). Optical microscopy in a transmission mode is employed for high-spatial-resolution image recording. The kinetics of spontaneous emulsification is studied. It is shown to generate a darkening of the drops because of interface modification with a characteristic time that depends upon the SPAN80 concentration. For low concentrations, spontaneous emulsification is slow and produces micrometer-sized droplets, whereas for large concentrations, it is fast and bush-like microstructures are observed. These microstructures increase in size and progressively invade the complete water/PO interfaces, detach, and finally migrate into the PO phase. This transport phenomenon withdraws water from the drops and leads to a gradual shrinking of their volume. At the end of this process, they appear as deformed objects surrounded by a loose membrane.
    Schlagwörter droplets ; emulsifying ; light microscopy ; microstructure ; oils ; surfactants
    Sprache Englisch
    Erscheinungsverlauf 2017-1212
    Umfang p. 14011-14019.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021%2Facs.langmuir.7b02549
    Datenquelle NAL Katalog (AGRICOLA)

    Zusatzmaterialien

    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  5. Artikel ; Online: Rheology and structure formation in diluted mixed particle-surfactant systems.

    Limage, Stéphanie / Krägel, Jurgen / Schmitt, Murielle / Dominici, Christian / Miller, Reinhard / Antoni, Mickael

    Langmuir : the ACS journal of surfaces and colloids

    2010  Band 26, Heft 22, Seite(n) 16754–16761

    Abstract: In the present work, we focus on the bulk rheology of mixtures consisting of surfactant modified silica nanoparticles in water. Depending on the ratio of surfactant and nanoparticle concentrations, significant modifications in the measured rheology are ... ...

    Abstract In the present work, we focus on the bulk rheology of mixtures consisting of surfactant modified silica nanoparticles in water. Depending on the ratio of surfactant and nanoparticle concentrations, significant modifications in the measured rheology are evidenced. A domain where the dispersions behave like viscoelastic media is observed. Outside this domain, the dispersions exhibit viscous properties. The changes in the bulk rheology characteristics are discussed in terms of interaction effects between the surfactant and the particles. The results obtained are seen in the context of diluted emulsions' properties and characteristics.
    Sprache Englisch
    Erscheinungsdatum 2010-11-16
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/la102473s
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

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