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Post-consumer Recycled PET Active Films Containing β-Cyclodextrins-Based Inclusion Complexes with Essential Oils: A Comparative Study between Processing Methodologies

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Abstract

Post-consumer PET (rPET) has become a worldwide concern due to the huge waste accumulation. Therefore, it is necessary to explore processing methods to recycle or reuse rPET to save resources and contribute to solving environment-related issues. Furthermore, the addition of inclusion complexes in the rPET matrix increases its application in terms of the release of active compounds that improve the added value of the polymer. Thus, active rPET films with thyme and orange essential oils were prepared by compression molding or extrusion. The effect of the different processing methods, as well as reprocessing, on the structural, mechanical, and antifungal properties of the active films was assessed. The results show that compression molding is not a suitable method to produce active films since their operation conditions, such as residence time and temperature, triggered the decomposition of the inclusion complex (IC), negatively affecting the appearance and mechanical properties (brittle and fragile) of films. Conversely, the extrusion process allowed preserving the IC and dispersing them adequately within the rPET matrix, maintaining the mechanical integrity of the films and resulting in a high antifungal activity against the growth of Penicillium funiculosum hyphae. This behavior was also observed after the re-extrusion process, corroborating that extrusion is a suitable method to process the active rPET films more than once without the detriment of their mechanical and antifungal properties.

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Acknowledgements

We want to thank R. Cedillo-García, M. Salinas- Hernández, G. Mendez-Padilla, J.F. Lara-Sánchez, J.A. Cepeda-Garza, C.N. Alvarado-Canché, M. Lozano-Estrada and J.A. Mercado-Silva for their technical assistance. We also thank the Laboratorio Nacional de Materiales Grafénicos (LNMG) for the facility in the use of characterization equipment through the CONAHCYT project 321244.

Funding

The authors are thankful for the partial financial support provided by the Laboratorio Nacional en Innovación y Desarrollo de Materiales Ligeros para la Industria Automotriz (LANIAUTO) through the CONAHCYT Project 321156. Also, author Flores-Silva Pamela C acknowledges the postdoctoral fellowship from CONAHCYT, Mexico.

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Authors and Affiliations

  1. Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna No. 140, Saltillo, C.P. 25253, Coahuila, México

    Pamela C Flores-Silva, Israel Sifuentes-Nieves, Pablo González-Morones, Antonio Ledezma-Pérez, Ernesto Hernández-Hernández & Eduardo Ramírez-Vargas

  2. Universidad Tecnológica del Valle del Mezquital (UTVM), Carretera Ixmiquilpan-Capula Km 4, Col. El Nith, Ixmiquilpan, 42300, Hidalgo, México

    Gisela Aguilar-Padilla

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  1. Pamela C Flores-Silva
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  2. Gisela Aguilar-Padilla
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  3. Israel Sifuentes-Nieves
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  4. Pablo González-Morones
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  5. Antonio Ledezma-Pérez
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  6. Ernesto Hernández-Hernández
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  7. Eduardo Ramírez-Vargas
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Contributions

Pamela C. Flores-Silva: Supervision, Original draft, Writing- Reviewing and Editing; Gisela Aguilar-Padilla: Methodology; Israel Sifuentes-Nieves: Writing - review & editing; Pablo Gonzáles-Morones: Methodology; Antonio Ledezma-Pérez: Investigation; Ernesto Hernández-Hernández: Investigation, Data curation; Eduardo Ramírez-Vargas: Conceptualization, Writing- Reviewing and Editing.

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Correspondence to Pamela C Flores-Silva or Eduardo Ramírez-Vargas.

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Flores-Silva, P., Aguilar-Padilla, G., Sifuentes-Nieves, I. et al. Post-consumer Recycled PET Active Films Containing β-Cyclodextrins-Based Inclusion Complexes with Essential Oils: A Comparative Study between Processing Methodologies. J Polym Environ (2023). https://doi.org/10.1007/s10924-023-03147-8

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