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Release of small hydrophilic molecules from polyelectrolyte capsules: Effect of the wall thickness
Univ Molise, Dipartimento Agr, Ambiente Alimenti DIAAA, I-86100 Campobasso, Italy.
Univ Molise, Dipartimento Agr, Ambiente Alimenti DIAAA, I-86100 Campobasso, Italy.ORCID iD: 0000-0003-4807-831X
Univ Cagliari, Dipartimento Sci Biomed, I-09042 Monserrato, CA, Italy.
Univ Coimbra, Dept Chem, P-3004535 Coimbra, Portugal.
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2015 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 447, p. 211-216Article in journal (Refereed) Published
Abstract [en]

Polymer nanocapsules assembled on cationic liposomes have been built through the layer-by-layer (LbL) technique. Chitosan and alginate, two biocompatible polyelectrolytes, were used to cover the template, where the Rhodamine B was previously loaded. The multishell formed with the alternate deposition of the polyelectrolytes, according to the principles of the LbL assembly, was supposed to change the permeability of the capsule wall. The thickness of the multishell was seen increasing with the number of layers deposited through the observations with the Transmission Electron Microscope. The permeability of the capsules was studied through Rhodamine B release assays. Nanocapsules with seven layers of polyelectrolytes released the dye slowly compared to the capsules with three or five layers. The Ritger-Peppas model was applied to investigate the release mechanisms and a non-Fickian transport behavior was detected regardless of the number of layers. Values of diffusion coefficients of Rhodamine B through the capsule wall were also calculated. (C) 2014 Elsevier Inc. All rights reserved.

Place, publisher, year, edition, pages
2015. Vol. 447, p. 211-216
Keywords [en]
Layer by layer, Polyelectrolyte nanocapsules, Multishell thickness, Molecule release
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-25645DOI: 10.1016/j.jcis.2014.10.060ISI: 000352660600027PubMedID: 25465199Scopus ID: 2-s2.0-84926186935OAI: oai:DiVA.org:miun-25645DiVA, id: diva2:849438
Available from: 2015-08-28 Created: 2015-08-18 Last updated: 2017-12-04Bibliographically approved

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Lopez, FrancescoLindman, BjörnCeglie, Andrea

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