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Article

Effect of Yerba Mate and Silk Fibroin Nanoparticles on the Migration Properties in Ethanolic Food Simulants and Composting Disintegrability of Recycled PLA Nanocomposites

1
Departamento de Ingeniería Química Industrial y Medio Ambiente, Universidad Politécnica de Madrid, E.T.S.I. Industriales, 28006 Madrid, Spain
2
Grupo de Investigación Polímeros Caracterización y Aplicaciones (POLCA), Madrid, Spain
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Depertamento de Biotecnología, Genómica y Mejora Vegetal, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), 30150 Murcia, Spain
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Deparamento de Química Orgánica, Facultad de Óptica y Optometría, Universidad Complutense de Madrid, 28037 Madrid, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Alexey Iordanskii
Polymers 2021, 13(12), 1925; https://doi.org/10.3390/polym13121925
Received: 16 May 2021 / Revised: 28 May 2021 / Accepted: 5 June 2021 / Published: 10 June 2021
(This article belongs to the Special Issue Advances in Biocomposites and Bioplastics)
The main objective of the present research is to study the effect of the incorporation of low amounts of silk fibroin nanoparticles (SFNs) and yerba mate nanoparticles (YMNs) on the migration phenomenon into ethanolic food simulants as well as on the disintegrability under composting conditions of mechanically recycled polylactic acid (PLA). Recycled PLA was obtained under simulated recycling conditions by melt processing virgin PLA into films and further subjecting them to an accelerated aging process, which involved photochemical, thermal, and hydrothermal aging steps followed by an intense washing step. SFNs were extracted from Bombyx mori cocoons and YMNs from yerba mate waste. Then, recycled PLA was melted, reprocessed, and reinforced with either 1%wt. of SFNs or YMNs, by melt extrusion, and further processed into films by compression molding. The obtained nanocomposites were exposed to ethanolic food simulants (ethanol 10% v/v, simulant A and ethanol 50% v/v, simulant D1) and the structural, thermal, and mechanical properties were studied before and after the exposure to the food simulants. The migration levels in both food simulants were below the overall migration limits required for food contact materials. The materials were disintegrated under simulated composting conditions at the laboratory scale level and it was observed that the nanoparticles delayed the disintegration rate of the recycled PLA matrix, but nanocomposites were fully disintegrated in less than one month. View Full-Text
Keywords: poly(lactic acid); nanocomposites; mechanical recycling; silk fibroin; yerba mate; migration; composting poly(lactic acid); nanocomposites; mechanical recycling; silk fibroin; yerba mate; migration; composting
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MDPI and ACS Style

Beltrán, F.R.; Arrieta, M.P.; Elena Antón, D.; Lozano-Pérez, A.A.; Cenis, J.L.; Gaspar, G.; de la Orden, M.U.; Martínez Urreaga, J. Effect of Yerba Mate and Silk Fibroin Nanoparticles on the Migration Properties in Ethanolic Food Simulants and Composting Disintegrability of Recycled PLA Nanocomposites. Polymers 2021, 13, 1925. https://doi.org/10.3390/polym13121925

AMA Style

Beltrán FR, Arrieta MP, Elena Antón D, Lozano-Pérez AA, Cenis JL, Gaspar G, de la Orden MU, Martínez Urreaga J. Effect of Yerba Mate and Silk Fibroin Nanoparticles on the Migration Properties in Ethanolic Food Simulants and Composting Disintegrability of Recycled PLA Nanocomposites. Polymers. 2021; 13(12):1925. https://doi.org/10.3390/polym13121925

Chicago/Turabian Style

Beltrán, Freddys R., Marina P. Arrieta, Diego Elena Antón, Antonio A. Lozano-Pérez, José L. Cenis, Gerald Gaspar, María U. de la Orden, and Joaquín Martínez Urreaga. 2021. "Effect of Yerba Mate and Silk Fibroin Nanoparticles on the Migration Properties in Ethanolic Food Simulants and Composting Disintegrability of Recycled PLA Nanocomposites" Polymers 13, no. 12: 1925. https://doi.org/10.3390/polym13121925

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