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Antioxidants 2015, 4(3), 533-547; doi:10.3390/antiox4030533

Development of Biocomposites with Antioxidant Activity Based on Red Onion Extract and Acetate Cellulose

Center for the Development of Nanoscience and Nanotechnology (CEDENNA)-Food Packaging Laboratory (LABEN-CHILE), Department of Science and Food Technology, Faculty of Technology, University of Santiago de Chile, Santiago 9170201, Chile
Author to whom correspondence should be addressed.
Academic Editors: Antonio Segura-Carretero and David Arráez-Román
Received: 31 May 2015 / Revised: 15 July 2015 / Accepted: 22 July 2015 / Published: 3 August 2015
(This article belongs to the Special Issue Analytical Determination of Polyphenols)
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Antioxidant biocomposites have been successfully developed from cellulose acetate, eco-friendly triethyl citrate plasticizer and onion extract as a source of natural antioxidants. First, an onion extraction process was optimized to obtain the extract with highest antioxidant power. Extracts under absolute ethanol and ethanol 85% were the extracts with the highest antioxidant activity, which were the characterized through different methods, DPPH (2,2-diphenyl-1-picrylhydrazyl) and ABTS (2,2ʹ-azinobis(3-ethylbenzothiazoline-6-sulphonate)), that measure radical scavenger activity, and polyphenolic and flavonoid content. Afterwards, the extract was incorporated in cellulose acetate as polymer matrix owing to develop an active material intended to oxidative sensitive food products packaging. Different concentrations of onion extract and plasticizer were statistically studied by using response surface methodology in order to analyze the influence of both factors on the release of active compounds and therefore the antioxidant activity of these materials. View Full-Text
Keywords: red onion; antioxidant capacity; active packaging; extraction; natural compounds red onion; antioxidant capacity; active packaging; extraction; natural compounds

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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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MDPI and ACS Style

de Dicastillo, C.L.; Navarro, R.; Guarda, A.; Galotto, M.J. Development of Biocomposites with Antioxidant Activity Based on Red Onion Extract and Acetate Cellulose. Antioxidants 2015, 4, 533-547.

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