Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/5124 |
Resumo: | A study of chemical transformations of cork during heat treatments was made using colour variation and FTIR analysis. The cork enriched fractions from Quercus cerris bark were subjected to isothermal heating in the temperature range 150–400 ◦C and treatment time from 5 to 90 min. Mass loss ranged from 3% (90 min at 150 ◦C) to 71% (60 min at 350 ◦C). FTIR showed that hemicelluloses were thermally degraded first while suberin remained as the most heat resistant component. The change of CIE-Lab parameters was rapid for low intensity treatments where no significant mass loss occurred (at 150 ◦C L* decreased from the initial 51.5 to 37.3 after 20 min). The decrease in all colour parameters continued with temperature until they remained substantially constant with over 40% mass loss. Modelling of the thermally induced mass loss could be made using colour analysis. This is applicable to monitoring the production of heat expanded insulation agglomerates. |
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Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopyQuercus CerrisCorkHeat TreatmentColour AnalysisFTIRCalcium-oxalateMechanical-propertiesSaponified corkCerris barkWoodLigninTemperatureCelluloseL.A study of chemical transformations of cork during heat treatments was made using colour variation and FTIR analysis. The cork enriched fractions from Quercus cerris bark were subjected to isothermal heating in the temperature range 150–400 ◦C and treatment time from 5 to 90 min. Mass loss ranged from 3% (90 min at 150 ◦C) to 71% (60 min at 350 ◦C). FTIR showed that hemicelluloses were thermally degraded first while suberin remained as the most heat resistant component. The change of CIE-Lab parameters was rapid for low intensity treatments where no significant mass loss occurred (at 150 ◦C L* decreased from the initial 51.5 to 37.3 after 20 min). The decrease in all colour parameters continued with temperature until they remained substantially constant with over 40% mass loss. Modelling of the thermally induced mass loss could be made using colour analysis. This is applicable to monitoring the production of heat expanded insulation agglomerates.Elsevier Science BVRCIPLSem, AliV Marques, AGominho, JorgePereira, Helena2015-09-08T15:37:34Z2012-072012-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10400.21/5124engSEM, A.; MARQUES, A. V.; GOMINHO, J.; PEREIRA, H. – Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy. Industrial Crops and Products. ISSN: 0926-6690. Vol. 38 (2012), pp. 132-1380926-669010.1016/j.indcrop.2012.01.018metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T09:48:05Zoai:repositorio.ipl.pt:10400.21/5124Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:14:26.907744Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy |
title |
Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy |
spellingShingle |
Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy Sem, Ali Quercus Cerris Cork Heat Treatment Colour Analysis FTIR Calcium-oxalate Mechanical-properties Saponified cork Cerris bark Wood Lignin Temperature Cellulose L. |
title_short |
Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy |
title_full |
Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy |
title_fullStr |
Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy |
title_full_unstemmed |
Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy |
title_sort |
Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy |
author |
Sem, Ali |
author_facet |
Sem, Ali V Marques, A Gominho, Jorge Pereira, Helena |
author_role |
author |
author2 |
V Marques, A Gominho, Jorge Pereira, Helena |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Sem, Ali V Marques, A Gominho, Jorge Pereira, Helena |
dc.subject.por.fl_str_mv |
Quercus Cerris Cork Heat Treatment Colour Analysis FTIR Calcium-oxalate Mechanical-properties Saponified cork Cerris bark Wood Lignin Temperature Cellulose L. |
topic |
Quercus Cerris Cork Heat Treatment Colour Analysis FTIR Calcium-oxalate Mechanical-properties Saponified cork Cerris bark Wood Lignin Temperature Cellulose L. |
description |
A study of chemical transformations of cork during heat treatments was made using colour variation and FTIR analysis. The cork enriched fractions from Quercus cerris bark were subjected to isothermal heating in the temperature range 150–400 ◦C and treatment time from 5 to 90 min. Mass loss ranged from 3% (90 min at 150 ◦C) to 71% (60 min at 350 ◦C). FTIR showed that hemicelluloses were thermally degraded first while suberin remained as the most heat resistant component. The change of CIE-Lab parameters was rapid for low intensity treatments where no significant mass loss occurred (at 150 ◦C L* decreased from the initial 51.5 to 37.3 after 20 min). The decrease in all colour parameters continued with temperature until they remained substantially constant with over 40% mass loss. Modelling of the thermally induced mass loss could be made using colour analysis. This is applicable to monitoring the production of heat expanded insulation agglomerates. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-07 2012-07-01T00:00:00Z 2015-09-08T15:37:34Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.21/5124 |
url |
http://hdl.handle.net/10400.21/5124 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
SEM, A.; MARQUES, A. V.; GOMINHO, J.; PEREIRA, H. – Study of thermochemical treatments of cork in the 150-400ºC range using colour analysis and Ftir spectroscopy. Industrial Crops and Products. ISSN: 0926-6690. Vol. 38 (2012), pp. 132-138 0926-6690 10.1016/j.indcrop.2012.01.018 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science BV |
publisher.none.fl_str_mv |
Elsevier Science BV |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
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1799133402426769408 |