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Depletion-induced flocculation of concentrated emulsions probed by photon density wave spectroscopy
- Stable, creaming-free oil in water emulsions with high volume fractions of oil (phi = 0.05-0.40, density matched to water) and polysorbate 80 as an emulsifier were characterized without dilution by Photon Density Wave spectroscopy measuring light absorption and scattering behavior, the latter serving as the basis for droplet size distribution analysis. The emulsion with phi = 0.10 was used to investigate flocculation processes induced by xanthan as a semi-flexible linear nonabsorbing polymer. Different time regimes in the development of the reduced scattering coefficient mu(s)' could be identified. First, a rapid, temperature-dependent change in mu(s)' during the depletion process was observed. Second, the further decrease of mu(s)' follows a power law in analogy to a spinodal demixing behavior, as described by the Cahn-Hilliard theory.
Verfasserangaben: | Katharina BresselORCiDGND, Wenke Müller, Martin Erwin LeserORCiD, Oliver ReichORCiDGND, Roland HassORCiDGND, Tim J. WoosterORCiD |
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DOI: | https://doi.org/10.1021/acs.langmuir.9b03642 |
ISSN: | 0743-7463 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/32162925 |
Titel des übergeordneten Werks (Englisch): | Langmuir |
Verlag: | American Chemical Society |
Verlagsort: | Washington |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Datum der Erstveröffentlichung: | 12.03.2020 |
Erscheinungsjahr: | 2020 |
Datum der Freischaltung: | 30.03.2023 |
Band: | 36 |
Ausgabe: | 13 |
Seitenanzahl: | 10 |
Erste Seite: | 3504 |
Letzte Seite: | 3513 |
Fördernde Institution: | Nestec Ltd., Vevey, Switzerland; German Federal Ministry of Education; and ResearchFederal Ministry of Education & Research (BMBF) [03Z22AN12]; University of Potsdam |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
DDC-Klassifikation: | 6 Technik, Medizin, angewandte Wissenschaften / 67 Industrielle Fertigung |
5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften | |
Peer Review: | Referiert |