Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (<i>Ilex paraguariensis</i>) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid)
In this work, yerba mate nanoparticles (YMNs) were extracted from <i>Ilex paraguairiencis</i> yerba mate wastes and further used to improve the overall performance of mechanically recycled PLA (PLAR). Recycled PLA was obtained by melt reprocessing PLA subjected to an accelerated ageing p...
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| Format: | Article |
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MDPI AG
2020-07-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/8/1690 |
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| author | Freddys R. Beltrán Marina P. Arrieta Gerald Gaspar María U. de la Orden Joaquín Martínez Urreaga |
| author_facet | Freddys R. Beltrán Marina P. Arrieta Gerald Gaspar María U. de la Orden Joaquín Martínez Urreaga |
| author_sort | Freddys R. Beltrán |
| collection | DOAJ |
| description | In this work, yerba mate nanoparticles (YMNs) were extracted from <i>Ilex paraguairiencis</i> yerba mate wastes and further used to improve the overall performance of mechanically recycled PLA (PLAR). Recycled PLA was obtained by melt reprocessing PLA subjected to an accelerated ageing process, which involved photochemical, thermal and hydrothermal ageing steps, as well as a final demanding washing step. YMNs (1 and 3 wt. %) were added to the PLAR during the melt reprocessing step and further processed into films. The main goal of the development of PLAR-YMNs bionanocomposites was to increase the barrier properties of recycled PLA, while showing good overall performance for food packaging applications. Thus, optical, structural, thermal, mechanical and barrier properties were evaluated. The incorporation of YMNs led to transparent greenish PLAR-based films with an effective blockage of harmful UV radiation. From the backbone FTIR stretching region (bands at 955 and 920 cm<sup>−1</sup>), it seems that YMNs favor the formation of crystalline domains acting as nucleating agents for PLAR. The morphological investigations revealed the good dispersion of YMNs in PLAR when they are used in the lowest amount of 1 wt. %, leading to bionanocomposites with improved mechanical performance. Although the addition of high hydrophilic YMNs increased the water vapor transmission, the addition of 1 wt. % of YMNs enhanced the oxygen barrier performance of the produced bionanocomposite films. These results show that the synergistic revalorization of post-consumer PLA and nanoparticles obtained from agri-food waste is a potential way for the production of promising packaging materials that meet with the principles of the circular economy. |
| first_indexed | 2024-03-10T18:07:47Z |
| format | Article |
| id | doaj.art-176542155c954805808be8400a5d87d0 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T18:07:47Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-176542155c954805808be8400a5d87d02023-11-20T08:19:32ZengMDPI AGPolymers2073-43602020-07-01128169010.3390/polym12081690Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (<i>Ilex paraguariensis</i>) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid)Freddys R. Beltrán0Marina P. Arrieta1Gerald Gaspar2María U. de la Orden3Joaquín Martínez Urreaga4Dpto. Ingeniería Química Industrial y Medio Ambiente, Universidad Politécnica de Madrid, E.T.S.I. Industriales, 28006 Madrid, SpainDpto. Ingeniería Química Industrial y Medio Ambiente, Universidad Politécnica de Madrid, E.T.S.I. Industriales, 28006 Madrid, SpainDpto. Ingeniería Química Industrial y Medio Ambiente, Universidad Politécnica de Madrid, E.T.S.I. Industriales, 28006 Madrid, SpainGrupo de Investigación: Polímeros, Caracterización y Aplicaciones (POLCA), 28006 Madrid, SpainDpto. Ingeniería Química Industrial y Medio Ambiente, Universidad Politécnica de Madrid, E.T.S.I. Industriales, 28006 Madrid, SpainIn this work, yerba mate nanoparticles (YMNs) were extracted from <i>Ilex paraguairiencis</i> yerba mate wastes and further used to improve the overall performance of mechanically recycled PLA (PLAR). Recycled PLA was obtained by melt reprocessing PLA subjected to an accelerated ageing process, which involved photochemical, thermal and hydrothermal ageing steps, as well as a final demanding washing step. YMNs (1 and 3 wt. %) were added to the PLAR during the melt reprocessing step and further processed into films. The main goal of the development of PLAR-YMNs bionanocomposites was to increase the barrier properties of recycled PLA, while showing good overall performance for food packaging applications. Thus, optical, structural, thermal, mechanical and barrier properties were evaluated. The incorporation of YMNs led to transparent greenish PLAR-based films with an effective blockage of harmful UV radiation. From the backbone FTIR stretching region (bands at 955 and 920 cm<sup>−1</sup>), it seems that YMNs favor the formation of crystalline domains acting as nucleating agents for PLAR. The morphological investigations revealed the good dispersion of YMNs in PLAR when they are used in the lowest amount of 1 wt. %, leading to bionanocomposites with improved mechanical performance. Although the addition of high hydrophilic YMNs increased the water vapor transmission, the addition of 1 wt. % of YMNs enhanced the oxygen barrier performance of the produced bionanocomposite films. These results show that the synergistic revalorization of post-consumer PLA and nanoparticles obtained from agri-food waste is a potential way for the production of promising packaging materials that meet with the principles of the circular economy.https://www.mdpi.com/2073-4360/12/8/1690poly(lactic acid)mechanical recyclingyerba matebionanocomposites |
| spellingShingle | Freddys R. Beltrán Marina P. Arrieta Gerald Gaspar María U. de la Orden Joaquín Martínez Urreaga Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (<i>Ilex paraguariensis</i>) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid) Polymers poly(lactic acid) mechanical recycling yerba mate bionanocomposites |
| title | Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (<i>Ilex paraguariensis</i>) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid) |
| title_full | Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (<i>Ilex paraguariensis</i>) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid) |
| title_fullStr | Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (<i>Ilex paraguariensis</i>) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid) |
| title_full_unstemmed | Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (<i>Ilex paraguariensis</i>) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid) |
| title_short | Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (<i>Ilex paraguariensis</i>) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid) |
| title_sort | effect of iignocellulosic nanoparticles extracted from yerba mate i ilex paraguariensis i on the structural thermal optical and barrier properties of mechanically recycled poly lactic acid |
| topic | poly(lactic acid) mechanical recycling yerba mate bionanocomposites |
| url | https://www.mdpi.com/2073-4360/12/8/1690 |
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