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Recycled Multi-Material Packaging Reinforced with Flax Fibres: Thermal and Mechanical Behaviour

In this work, the use of a recycled mix stemming from the treatment of multilayer aseptic packaging used in the food and beverage industry is proposed as the matrix for short fibre composites reinforced with flax fibres, to generate value-added materials in contrast to the more common end-of-life sc...

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Autores principales: Bavasso, Irene, Sergi, Claudia, Valente, Teodoro, Tirillò, Jacopo, Sarasini, Fabrizio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9609665/
https://www.ncbi.nlm.nih.gov/pubmed/36298001
http://dx.doi.org/10.3390/polym14204423
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author Bavasso, Irene
Sergi, Claudia
Valente, Teodoro
Tirillò, Jacopo
Sarasini, Fabrizio
author_facet Bavasso, Irene
Sergi, Claudia
Valente, Teodoro
Tirillò, Jacopo
Sarasini, Fabrizio
author_sort Bavasso, Irene
collection PubMed
description In this work, the use of a recycled mix stemming from the treatment of multilayer aseptic packaging used in the food and beverage industry is proposed as the matrix for short fibre composites reinforced with flax fibres, to generate value-added materials in contrast to the more common end-of-life scenario including energy recovery. This is expected to be a preferred choice in the waste hierarchy at the European level. A commercially available material (EcoAllene) obtained from multilayer packaging recycling was compounded with short flax fibres up to 30 wt.% by twin screw extrusion, with a view to enhancing its poor mechanical profile and broadening its applications. Composites were in depth analyzed by thermogravimetric analysis and differential scanning calorimetry, which highlighted the complex nature of this recycled product, a limited nucleation ability of flax fibres and a lower thermal stability due to the premature degradation of natural hemicellulose and cellulose, though featuring in any case onset degradation temperatures higher than 300 °C. Composites’ mechanical properties were assessed in tension, bending and impact conditions, with remarkable improvements over the neat matrix in terms of stiffness and strength. In particular, at 30 wt.% fibre content and with 5 wt.% of maleated coupling agent, an increase in tensile and flexural strength values by 92% and 138% was achieved, respectively, without compromising the impact strength. The effectiveness of flax fibres confirmed by dynamo-mechanical analysis is beneficial to the exploitation of these composites in automotive interiors and outdoor decking applications.
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spelling pubmed-96096652022-10-28 Recycled Multi-Material Packaging Reinforced with Flax Fibres: Thermal and Mechanical Behaviour Bavasso, Irene Sergi, Claudia Valente, Teodoro Tirillò, Jacopo Sarasini, Fabrizio Polymers (Basel) Article In this work, the use of a recycled mix stemming from the treatment of multilayer aseptic packaging used in the food and beverage industry is proposed as the matrix for short fibre composites reinforced with flax fibres, to generate value-added materials in contrast to the more common end-of-life scenario including energy recovery. This is expected to be a preferred choice in the waste hierarchy at the European level. A commercially available material (EcoAllene) obtained from multilayer packaging recycling was compounded with short flax fibres up to 30 wt.% by twin screw extrusion, with a view to enhancing its poor mechanical profile and broadening its applications. Composites were in depth analyzed by thermogravimetric analysis and differential scanning calorimetry, which highlighted the complex nature of this recycled product, a limited nucleation ability of flax fibres and a lower thermal stability due to the premature degradation of natural hemicellulose and cellulose, though featuring in any case onset degradation temperatures higher than 300 °C. Composites’ mechanical properties were assessed in tension, bending and impact conditions, with remarkable improvements over the neat matrix in terms of stiffness and strength. In particular, at 30 wt.% fibre content and with 5 wt.% of maleated coupling agent, an increase in tensile and flexural strength values by 92% and 138% was achieved, respectively, without compromising the impact strength. The effectiveness of flax fibres confirmed by dynamo-mechanical analysis is beneficial to the exploitation of these composites in automotive interiors and outdoor decking applications. MDPI 2022-10-19 /pmc/articles/PMC9609665/ /pubmed/36298001 http://dx.doi.org/10.3390/polym14204423 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. 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/).
spellingShingle Article
Bavasso, Irene
Sergi, Claudia
Valente, Teodoro
Tirillò, Jacopo
Sarasini, Fabrizio
Recycled Multi-Material Packaging Reinforced with Flax Fibres: Thermal and Mechanical Behaviour
title Recycled Multi-Material Packaging Reinforced with Flax Fibres: Thermal and Mechanical Behaviour
title_full Recycled Multi-Material Packaging Reinforced with Flax Fibres: Thermal and Mechanical Behaviour
title_fullStr Recycled Multi-Material Packaging Reinforced with Flax Fibres: Thermal and Mechanical Behaviour
title_full_unstemmed Recycled Multi-Material Packaging Reinforced with Flax Fibres: Thermal and Mechanical Behaviour
title_short Recycled Multi-Material Packaging Reinforced with Flax Fibres: Thermal and Mechanical Behaviour
title_sort recycled multi-material packaging reinforced with flax fibres: thermal and mechanical behaviour
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9609665/
https://www.ncbi.nlm.nih.gov/pubmed/36298001
http://dx.doi.org/10.3390/polym14204423
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