Development of novel nano-biocomposite antioxidant films based on poly (lactic acid) and thymol for active packaging
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Title: | Development of novel nano-biocomposite antioxidant films based on poly (lactic acid) and thymol for active packaging |
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Authors: | Ramos, Marina | Jiménez, Alfonso | Peltzer, Mercedes Ana | Garrigós, María del Carmen |
Research Group/s: | Análisis de Polímeros y Nanomateriales |
Center, Department or Service: | Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología |
Keywords: | PLA | Active packaging | Thymol | Montmorillonite | Antioxidant film |
Knowledge Area: | Química Analítica |
Issue Date: | 13-Apr-2014 |
Publisher: | Elsevier |
Citation: | Food Chemistry. 2014, Accepted Manuscript, Available online 13 April 2014. doi:10.1016/j.foodchem.2014.04.026 |
Abstract: | Novel nano-biocomposite films based on poly (lactic acid) (PLA) were prepared by incorporating thymol, as the active additive, and modified montmorillonite (D43B) at two different concentrations. A complete thermal, structural, mechanical and functional characterization of all nano-biocomposites was carried out. Thermal stability was not significantly affected by the addition of thymol, but the incorporation of D43B improved mechanical properties and reduced the oxygen transmission rate by the formation of intercalated structures, as suggested by wide angle X-ray scattering patterns and transmission electron microscopy images. The addition of thymol decreased the PLA glass transition temperature, as the result of the polymer plasticization, and led to modification of the elastic modulus and elongation at break. Finally, the amount of thymol remaining in these formulations was determined by liquid chromatography (HPLC-UV) and the antioxidant activity by the DPPH spectroscopic method, suggesting that the formulated nano-biocomposites could be considered a promising antioxidant active packaging material. |
Sponsor: | Spanish Ministry of Economy and Competitiveness (MAT2011-28468-C02-01). Marina Ramos would like to thank University of Alicante (Spain) for UAFPU2011-48539721S pre-doctoral research grant. |
URI: | http://hdl.handle.net/10045/36860 |
ISSN: | 0308-8146 (Print) | 1873-7072 (Online) |
DOI: | 10.1016/j.foodchem.2014.04.026 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1016/j.foodchem.2014.04.026 |
Appears in Collections: | INV - NANOBIOPOL - Artículos de Revistas |
Files in This Item:
File | Description | Size | Format | |
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2014_Ramos_etal_Food-Chemistry.pdf | Accepted Manuscript (acceso abierto) | 654,47 kB | Adobe PDF | Open Preview |
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