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Aging Resistance of Biocomposites Crosslinked with Silica and Quercetin

This research focuses on revealing the double role of quercetin accompanied by silica in epoxidized natural rubber. A crosslinking ability with antioxidative properties exists and reveals the dependence of these functions on quercetin content. Here, the aging resistance of self-healable biocomposite...

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Detalles Bibliográficos
Autores principales: Masek, Anna, Olejnik, Olga
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8509444/
https://www.ncbi.nlm.nih.gov/pubmed/34639234
http://dx.doi.org/10.3390/ijms221910894
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author Masek, Anna
Olejnik, Olga
author_facet Masek, Anna
Olejnik, Olga
author_sort Masek, Anna
collection PubMed
description This research focuses on revealing the double role of quercetin accompanied by silica in epoxidized natural rubber. A crosslinking ability with antioxidative properties exists and reveals the dependence of these functions on quercetin content. Here, the aging resistance of self-healable biocomposites was analyzed. The self-healing properties were presented in our previous work. The stabilizing effect of quercetin applied as a crosslinking agent has been studied in epoxidized natural rubber with a 50 mol% of epoxidation (ENR-50). Some of five -OH moiety groups existing in the quercetin structure are able to react with epoxy rings of ENR-50 and cure this elastomer, whereas other free hydroxyl groups can donate the hydrogen molecule to a radical molecule, stabilizing it. The aging resistance of prepared composites was estimated by mechanical tests conducted before and after different types of aging, as well as by differences in color and surface energy between aged and un-aged samples. Changes within the oxygen function, which occurred as a result of the aging process, were observed using FT-IR absorbance spectroscopy. Furthermore, the impact of quercetin content on composites’ thermal stability was investigated by thermogravimetry (TGA). According to the results, a proper dose of quercetin can act as a crosslinker and antioxidant in ENR-50 at the same time.
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spelling pubmed-85094442021-10-13 Aging Resistance of Biocomposites Crosslinked with Silica and Quercetin Masek, Anna Olejnik, Olga Int J Mol Sci Article This research focuses on revealing the double role of quercetin accompanied by silica in epoxidized natural rubber. A crosslinking ability with antioxidative properties exists and reveals the dependence of these functions on quercetin content. Here, the aging resistance of self-healable biocomposites was analyzed. The self-healing properties were presented in our previous work. The stabilizing effect of quercetin applied as a crosslinking agent has been studied in epoxidized natural rubber with a 50 mol% of epoxidation (ENR-50). Some of five -OH moiety groups existing in the quercetin structure are able to react with epoxy rings of ENR-50 and cure this elastomer, whereas other free hydroxyl groups can donate the hydrogen molecule to a radical molecule, stabilizing it. The aging resistance of prepared composites was estimated by mechanical tests conducted before and after different types of aging, as well as by differences in color and surface energy between aged and un-aged samples. Changes within the oxygen function, which occurred as a result of the aging process, were observed using FT-IR absorbance spectroscopy. Furthermore, the impact of quercetin content on composites’ thermal stability was investigated by thermogravimetry (TGA). According to the results, a proper dose of quercetin can act as a crosslinker and antioxidant in ENR-50 at the same time. MDPI 2021-10-08 /pmc/articles/PMC8509444/ /pubmed/34639234 http://dx.doi.org/10.3390/ijms221910894 Text en © 2021 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
Masek, Anna
Olejnik, Olga
Aging Resistance of Biocomposites Crosslinked with Silica and Quercetin
title Aging Resistance of Biocomposites Crosslinked with Silica and Quercetin
title_full Aging Resistance of Biocomposites Crosslinked with Silica and Quercetin
title_fullStr Aging Resistance of Biocomposites Crosslinked with Silica and Quercetin
title_full_unstemmed Aging Resistance of Biocomposites Crosslinked with Silica and Quercetin
title_short Aging Resistance of Biocomposites Crosslinked with Silica and Quercetin
title_sort aging resistance of biocomposites crosslinked with silica and quercetin
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8509444/
https://www.ncbi.nlm.nih.gov/pubmed/34639234
http://dx.doi.org/10.3390/ijms221910894
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