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Open AccessArticle

Rheological Properties of Alginate–Essential Oil Nanodispersions

Department of Agricultural, Environmental and Food Sciences (DiAAA) and Center for Colloid and Surface Science (CSGI), University of Molise, Via De Sanctis, I-86100 Campobasso, Italy
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Colloids Interfaces 2018, 2(4), 48; https://doi.org/10.3390/colloids2040048
Received: 27 September 2018 / Revised: 13 October 2018 / Accepted: 15 October 2018 / Published: 17 October 2018
Due to its favorable structural properties and biocompatibility, alginate is recognized as a suitable versatile biopolymer for use in a broad range of applications ranging from drug delivery, wound healing, tissue engineering, and food formulations such as nanodispersions. Rheological analysis plays a crucial role in the design of suitable nanoemulsion based coatings. Different essential oil and alginate nanodispersion compositions stabilized by Tween 80 were analyzed for rheological and conductometric properties. The results confirmed that the nanoformulations shared a pseudoplastic non-Newtonian behavior that was more evident with higher alginate concentrations (2%). Nanodispersions made of alginate and essential oil exhibited a slight thixotropic behavior, demonstrating the aptitude to instantaneously recover from the applied stress or strain. Oscillatory frequency sweep tests showed a similar fluid-like behavior for 1% and 2% alginate nanodispersions. Finally, it was demonstrated that advantages coming with the use of the essential oil are added to the positive aspects of alginate with no dramatic modification on the flow behavior. View Full-Text
Keywords: alginate; nanoemulsions; rheology; coating; essential oil alginate; nanoemulsions; rheology; coating; essential oil
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MDPI and ACS Style

Cofelice, M.; Cuomo, F.; Lopez, F. Rheological Properties of Alginate–Essential Oil Nanodispersions. Colloids Interfaces 2018, 2, 48.

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