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Sustainable Sheep Wool/Soy Protein Biocomposites for Sound Absorption
The wool fibers of the Latxa sheep breed were combined with a soy protein isolate (SPI) matrix to develop sustainable biocomposites with acoustic properties, adding value to Latxa sheep wool, which is currently considered a residue. Samples with 7, 10, 15, and 20 wt % wool were prepared by freeze dr...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9740274/ https://www.ncbi.nlm.nih.gov/pubmed/36501630 http://dx.doi.org/10.3390/polym14235231 |
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author | Urdanpilleta, Marta Leceta, Itsaso Guerrero, Pedro de la Caba, Koro |
author_facet | Urdanpilleta, Marta Leceta, Itsaso Guerrero, Pedro de la Caba, Koro |
author_sort | Urdanpilleta, Marta |
collection | PubMed |
description | The wool fibers of the Latxa sheep breed were combined with a soy protein isolate (SPI) matrix to develop sustainable biocomposites with acoustic properties, adding value to Latxa sheep wool, which is currently considered a residue. Samples with 7, 10, 15, and 20 wt % wool were prepared by freeze drying in order to develop porous structures, as shown by SEM analysis. Additionally, XRD analysis provided the evidence of a change toward a more amorphous structure with the incorporation of wool fibers due to the interactions between the soy protein and keratin present in wool fibers, as shown by the relative intensity changes in the FTIR bands. The biocomposites were analyzed in a Kundt’s tube to obtain their sound absorption coefficient at normal incidence. The results showed an acoustic absorption coefficient that well-surpassed 0.9 for frequencies above 1000 Hz. This performance is comparable to that of the conventional synthetic materials present in the market and, thus, sheep wool/SPI biocomposites are suitable to be used as acoustic absorbers in the building industry, highlighting the potential of replacing not only synthetic fibers but also synthetic polymers, with natural materials to enhance the sustainability of the building sector. |
format | Online Article Text |
id | pubmed-9740274 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-97402742022-12-11 Sustainable Sheep Wool/Soy Protein Biocomposites for Sound Absorption Urdanpilleta, Marta Leceta, Itsaso Guerrero, Pedro de la Caba, Koro Polymers (Basel) Article The wool fibers of the Latxa sheep breed were combined with a soy protein isolate (SPI) matrix to develop sustainable biocomposites with acoustic properties, adding value to Latxa sheep wool, which is currently considered a residue. Samples with 7, 10, 15, and 20 wt % wool were prepared by freeze drying in order to develop porous structures, as shown by SEM analysis. Additionally, XRD analysis provided the evidence of a change toward a more amorphous structure with the incorporation of wool fibers due to the interactions between the soy protein and keratin present in wool fibers, as shown by the relative intensity changes in the FTIR bands. The biocomposites were analyzed in a Kundt’s tube to obtain their sound absorption coefficient at normal incidence. The results showed an acoustic absorption coefficient that well-surpassed 0.9 for frequencies above 1000 Hz. This performance is comparable to that of the conventional synthetic materials present in the market and, thus, sheep wool/SPI biocomposites are suitable to be used as acoustic absorbers in the building industry, highlighting the potential of replacing not only synthetic fibers but also synthetic polymers, with natural materials to enhance the sustainability of the building sector. MDPI 2022-12-01 /pmc/articles/PMC9740274/ /pubmed/36501630 http://dx.doi.org/10.3390/polym14235231 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 Urdanpilleta, Marta Leceta, Itsaso Guerrero, Pedro de la Caba, Koro Sustainable Sheep Wool/Soy Protein Biocomposites for Sound Absorption |
title | Sustainable Sheep Wool/Soy Protein Biocomposites for Sound Absorption |
title_full | Sustainable Sheep Wool/Soy Protein Biocomposites for Sound Absorption |
title_fullStr | Sustainable Sheep Wool/Soy Protein Biocomposites for Sound Absorption |
title_full_unstemmed | Sustainable Sheep Wool/Soy Protein Biocomposites for Sound Absorption |
title_short | Sustainable Sheep Wool/Soy Protein Biocomposites for Sound Absorption |
title_sort | sustainable sheep wool/soy protein biocomposites for sound absorption |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9740274/ https://www.ncbi.nlm.nih.gov/pubmed/36501630 http://dx.doi.org/10.3390/polym14235231 |
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