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A Green Approach for Recycling Compact Discs

Compact discs (CDs) and digital versatile discs (DVDs) are mainly made by polycarbonate disc, a thin layer of aluminum or silver, a thin layer of a coating and a thin layer of a label of paper or PET. The recycling of these discs is difficult due to the removal of these non-polymeric layers and to o...

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Autores principales: La Mantia, Francesco Paolo, Liarda, Domenico, Ceraulo, Manuela, Mistretta, Maria Chiara
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921742/
https://www.ncbi.nlm.nih.gov/pubmed/36771792
http://dx.doi.org/10.3390/polym15030491
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author La Mantia, Francesco Paolo
Liarda, Domenico
Ceraulo, Manuela
Mistretta, Maria Chiara
author_facet La Mantia, Francesco Paolo
Liarda, Domenico
Ceraulo, Manuela
Mistretta, Maria Chiara
author_sort La Mantia, Francesco Paolo
collection PubMed
description Compact discs (CDs) and digital versatile discs (DVDs) are mainly made by polycarbonate disc, a thin layer of aluminum or silver, a thin layer of a coating and a thin layer of a label of paper or PET. The recycling of these discs is difficult due to the removal of these non-polymeric layers and to our best knowledge, no industrial plants have been resent for their recycling. In this work, we propose a facile way to remove the non-polymeric layers and investigate the effect of the repetitive extrusion process on the processability and on the mechanical properties of the recycled polycarbonate. A few works have been published dealing with both the removal of the non-polymeric layers and the mechanical recycling of the disk of polycarbonate. In our approach, the removal of the non-polymeric layers is easily obtained through a thermo-mechanical treatment in a basic solution by ammonia. This process can be considered green because is made at a low temperature with a small amount of water and a very small amount of ammonia, saving energy and water. The properties of the polycarbonate remain good if the mechanical recycling is made after drying the post-consumer polycarbonate.
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spelling pubmed-99217422023-02-12 A Green Approach for Recycling Compact Discs La Mantia, Francesco Paolo Liarda, Domenico Ceraulo, Manuela Mistretta, Maria Chiara Polymers (Basel) Article Compact discs (CDs) and digital versatile discs (DVDs) are mainly made by polycarbonate disc, a thin layer of aluminum or silver, a thin layer of a coating and a thin layer of a label of paper or PET. The recycling of these discs is difficult due to the removal of these non-polymeric layers and to our best knowledge, no industrial plants have been resent for their recycling. In this work, we propose a facile way to remove the non-polymeric layers and investigate the effect of the repetitive extrusion process on the processability and on the mechanical properties of the recycled polycarbonate. A few works have been published dealing with both the removal of the non-polymeric layers and the mechanical recycling of the disk of polycarbonate. In our approach, the removal of the non-polymeric layers is easily obtained through a thermo-mechanical treatment in a basic solution by ammonia. This process can be considered green because is made at a low temperature with a small amount of water and a very small amount of ammonia, saving energy and water. The properties of the polycarbonate remain good if the mechanical recycling is made after drying the post-consumer polycarbonate. MDPI 2023-01-17 /pmc/articles/PMC9921742/ /pubmed/36771792 http://dx.doi.org/10.3390/polym15030491 Text en © 2023 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
La Mantia, Francesco Paolo
Liarda, Domenico
Ceraulo, Manuela
Mistretta, Maria Chiara
A Green Approach for Recycling Compact Discs
title A Green Approach for Recycling Compact Discs
title_full A Green Approach for Recycling Compact Discs
title_fullStr A Green Approach for Recycling Compact Discs
title_full_unstemmed A Green Approach for Recycling Compact Discs
title_short A Green Approach for Recycling Compact Discs
title_sort green approach for recycling compact discs
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921742/
https://www.ncbi.nlm.nih.gov/pubmed/36771792
http://dx.doi.org/10.3390/polym15030491
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