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The Components’ Roles in Thermal Stability and Flammability of Cork Powder

In this study, an analysis of the influence of extractives, suberin and lignocellulosic components on the pyrolysis decomposition and fire reaction mechanisms of a cork oak powder from Quercus suber L. is presented. The summative chemical composition of cork powder was determined. Suberin was the ma...

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Autores principales: Ghonjizade-Samani, Farnaz, Haurie, Laia, Malet, Ramón, Realinho, Vera
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10220959/
https://www.ncbi.nlm.nih.gov/pubmed/37241456
http://dx.doi.org/10.3390/ma16103829
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author Ghonjizade-Samani, Farnaz
Haurie, Laia
Malet, Ramón
Realinho, Vera
author_facet Ghonjizade-Samani, Farnaz
Haurie, Laia
Malet, Ramón
Realinho, Vera
author_sort Ghonjizade-Samani, Farnaz
collection PubMed
description In this study, an analysis of the influence of extractives, suberin and lignocellulosic components on the pyrolysis decomposition and fire reaction mechanisms of a cork oak powder from Quercus suber L. is presented. The summative chemical composition of cork powder was determined. Suberin was the main component at 40% of the total weight, followed by 24% of lignin, 19% of polysaccharides and 14% of extractives. The absorbance peaks of cork and its individual components were further analyzed by means of ATR-FTIR spectrometry. Thermogravimetric analysis (TGA) showed that the removal of extractives from cork slightly increased the thermal stability between 200 °C and 300 °C and led to the formation of a more thermally stable residue at the end of the cork decomposition. Moreover, by removing suberin, a shift of the onset decomposition temperature to a lower temperature was noticed, indicating that suberin plays a major role in enhancing the thermal stability of cork. Furthermore, non-polar extractives showed the highest flammability with a peak of heat release rate (pHRR) of 365 W/g analyzed by means of micro-scale combustion calorimetry (MCC). Above 300 °C, the heat release rate (HRR) of suberin was lower than that of polysaccharides or lignin. However, below that temperature it released more flammable gases with a pHRR of 180 W/g, without significant charring ability, contrary to the mentioned components that showed lower HRR due to their prominent condensed mode of action that slowed down the mass and heat transfer processes during the combustion process.
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spelling pubmed-102209592023-05-28 The Components’ Roles in Thermal Stability and Flammability of Cork Powder Ghonjizade-Samani, Farnaz Haurie, Laia Malet, Ramón Realinho, Vera Materials (Basel) Article In this study, an analysis of the influence of extractives, suberin and lignocellulosic components on the pyrolysis decomposition and fire reaction mechanisms of a cork oak powder from Quercus suber L. is presented. The summative chemical composition of cork powder was determined. Suberin was the main component at 40% of the total weight, followed by 24% of lignin, 19% of polysaccharides and 14% of extractives. The absorbance peaks of cork and its individual components were further analyzed by means of ATR-FTIR spectrometry. Thermogravimetric analysis (TGA) showed that the removal of extractives from cork slightly increased the thermal stability between 200 °C and 300 °C and led to the formation of a more thermally stable residue at the end of the cork decomposition. Moreover, by removing suberin, a shift of the onset decomposition temperature to a lower temperature was noticed, indicating that suberin plays a major role in enhancing the thermal stability of cork. Furthermore, non-polar extractives showed the highest flammability with a peak of heat release rate (pHRR) of 365 W/g analyzed by means of micro-scale combustion calorimetry (MCC). Above 300 °C, the heat release rate (HRR) of suberin was lower than that of polysaccharides or lignin. However, below that temperature it released more flammable gases with a pHRR of 180 W/g, without significant charring ability, contrary to the mentioned components that showed lower HRR due to their prominent condensed mode of action that slowed down the mass and heat transfer processes during the combustion process. MDPI 2023-05-18 /pmc/articles/PMC10220959/ /pubmed/37241456 http://dx.doi.org/10.3390/ma16103829 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
Ghonjizade-Samani, Farnaz
Haurie, Laia
Malet, Ramón
Realinho, Vera
The Components’ Roles in Thermal Stability and Flammability of Cork Powder
title The Components’ Roles in Thermal Stability and Flammability of Cork Powder
title_full The Components’ Roles in Thermal Stability and Flammability of Cork Powder
title_fullStr The Components’ Roles in Thermal Stability and Flammability of Cork Powder
title_full_unstemmed The Components’ Roles in Thermal Stability and Flammability of Cork Powder
title_short The Components’ Roles in Thermal Stability and Flammability of Cork Powder
title_sort components’ roles in thermal stability and flammability of cork powder
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10220959/
https://www.ncbi.nlm.nih.gov/pubmed/37241456
http://dx.doi.org/10.3390/ma16103829
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