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

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Beltrán González, Freddys and Arrieta Dillon, Marina Patricia and Elena Antón, Diego and Lozano Pérez, Antonio Abel and Cenis Anadón, José Luis and Gaspar Roa, Gerald Manuel and Orden Hernández, María Ulagares de la and Martínez Urreaga, Joaquín (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 (1925). ISSN 2073-4360

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Official URL: https://doi.org/10.3390/polym13121925




Abstract

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.


Item Type:Article
Additional Information:

Received: 16 May 2021 / Revised: 28 May 2021 / Accepted: 5 June 2021 / Published: 10 June 2021.
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
This article belongs to the Special Issue Advances in Biocomposites and Bioplastics.

Uncontrolled Keywords:Poly (lactic acid); Nanocomposites; Mechanical recycling; Silk fibroin; Yerba mate; Migration; Composting
Subjects:Sciences > Chemistry > Nutrition
Sciences > Chemistry > Waste products
ID Code:67560
Deposited On:09 Sep 2021 15:12
Last Modified:10 Sep 2021 07:36

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