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Microrheology of novel cellulose stabilized oil-in-water emulsions
University of Algarve, Faro, Portugal.
University of Algarve, Faro, Portugal.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering. (FSCN)
University of Algarve, Faro, Portugal.
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2018 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 531, no 1 December 2018, p. 225-232Article in journal (Refereed) Published
Abstract [en]

Diffusing wave spectroscopy (DWS) is a powerful optical technique suitable to investigate turbid samples in a nondestructive and reproducible way, providing information on the static and dynamic properties of the system. This includes the relative displacement of emulsion droplets over time and changes in the viscoelastic properties. Here, novel and promising cellulose-based oil-in-water (O/W) emulsions were prepared and studied, for the first time, by DWS. Cellulose plays the role of a novel eco-friendly emulsifying agent. The hydrolysis time of cellulose was observed to affect the average size of the emulsion droplets and their stability; the longer the hydrolysis time, the more dispersed and stable the emulsions were found to be. Additionally, a good complementarity between the microrheology (DWS) and macrorheology (mechanical rheometer) data was found. Our work suggests that DWS is a highly attractive method to investigate the stability, aging and microrheology properties of cellulose-based emulsions, providing valuable insights on their microstructure. This technique is thus highly appealing for the characterization and design of novel emulsion formulations.

Place, publisher, year, edition, pages
2018. Vol. 531, no 1 December 2018, p. 225-232
Keywords [en]
Diffusing wave spectroscopy, Cellulose, Emulsions, Microrheology
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-34407DOI: 10.1016/j.jcis.2018.07.043ISI: 000444067300025PubMedID: 30032009Scopus ID: 2-s2.0-85050164802OAI: oai:DiVA.org:miun-34407DiVA, id: diva2:1247879
Available from: 2018-09-13 Created: 2018-09-13 Last updated: 2018-09-28

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Costa, CarolinaLindman, BjörnEdlund, HåkanNorgren, Magnus

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