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Olive Mill Wastewater Valorization in Multifunctional Biopolymer Composites for Antibacterial Packaging Application

1
Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, Via Terracini 28, 40131 Bologna, Italy
2
Department of Agricultural and Food Sciences, Università di Bologna, viale Fanin 42, 40127 Bologna, Italy
3
Institut de Chimie de Clermont Ferrand (ICCF)—UMR 6296 Clermont-Auvergne Université, CNRS, 24 Avenue Blaise Pascal, 63177 Aubiere (CEDEX), France
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(10), 2376; https://doi.org/10.3390/ijms20102376
Received: 4 April 2019 / Revised: 3 May 2019 / Accepted: 11 May 2019 / Published: 14 May 2019
(This article belongs to the Special Issue Polymeric Systems as Antimicrobial or Antifouling Agents)
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Abstract

Olive mill wastewater (OMW) is the aqueous waste derived from the production of virgin olive oil. OMW typically contains a wide range of phenol-type molecules, which are natural antioxidants and/or antibacterials. In order to exploit the bioactive molecules and simultaneously decrease the environmental impact of such a food waste stream, OMW has been intercalated into the host structure of ZnAl layered double hydroxide (LDH) and employed as an integrative filler for the preparation of poly(butylene succinate) (PBS) composites by in situ polymerization. From the view point of the polymer continuous phase as well as from the side of the hybrid filler, an investigation was performed in terms of molecular and morphological characteristics by gel permeation chromatography (GPC) and X-ray diffraction (XRD); also, the thermal and mechanical properties were evaluated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic thermomechanical analysis (DMTA). Antibacterial properties have been assessed against a Gram-positive and a Gram-negative bacterium, Staphylococcus aureus and Escherichia coli, respectively, as representatives of potential agents of foodborne illnesses. View Full-Text
Keywords: multifunctional hybrid systems; olive mill wastewater; antibacterial properties; layered double hydroxides; bionanocomposites multifunctional hybrid systems; olive mill wastewater; antibacterial properties; layered double hydroxides; bionanocomposites
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sisti, L.; Totaro, G.; Bozzi Cionci, N.; Di Gioia, D.; Celli, A.; Verney, V.; Leroux, F. Olive Mill Wastewater Valorization in Multifunctional Biopolymer Composites for Antibacterial Packaging Application. Int. J. Mol. Sci. 2019, 20, 2376.

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