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Study of thermochemical treatments of cork in the 150-400ÂșC range using colour analysis and Ftir spectroscopy

2012-07Journal article Restricted access
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dc.contributor.authorSem, Ali
dc.contributor.authorV Marques, A
dc.contributor.authorGominho, Jorge
dc.contributor.authorPereira, Helena
dc.date.accessioned2015-09-08T15:37:34Z
dc.date.available2015-09-08T15:37:34Z
dc.date.issued2012-07
dc.description.abstractA 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.por
dc.identifier.citationSEM, A.; MARQUES, A. V.; GOMINHO, J.; PEREIRA, H. – Study of thermochemical treatments of cork in the 150-400ÂșC range using colour analysis and Ftir spectroscopy. Industrial Crops and Products. ISSN: 0926-6690. Vol. 38 (2012), pp. 132-138por
dc.identifier.doi10.1016/j.indcrop.2012.01.018
dc.identifier.issn0926-6690
dc.identifier.urihttp://hdl.handle.net/10400.21/5124
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science BVpor
dc.relationFundação para a CiĂȘncia e Tecnologia, Portugal - PEst-OE/AGR/UI0239/2011
dc.subjectQuercus Cerrispor
dc.subjectCorkpor
dc.subjectHeat Treatmentpor
dc.subjectColour Analysispor
dc.subjectFTIRpor
dc.subjectCalcium-oxalate
dc.subjectMechanical-properties
dc.subjectSaponified cork
dc.subjectCerris bark
dc.subjectWood
dc.subjectLignin
dc.subjectTemperature
dc.subjectCellulose
dc.subjectL.
dc.titleStudy of thermochemical treatments of cork in the 150-400ÂșC range using colour analysis and Ftir spectroscopypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceAmsterdam
oaire.citation.endPage138por
oaire.citation.startPage132por
oaire.citation.titleIndustrial Crops and Productspor
oaire.citation.volume38por
person.familyNameMarques
person.givenNameAntĂłnio
person.identifier.orcid0000-0001-7421-6363
person.identifier.scopus-author-id7202134785
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationb3d0c7ab-dc57-45a9-a86b-6f99a6232f34
relation.isAuthorOfPublication.latestForDiscoveryb3d0c7ab-dc57-45a9-a86b-6f99a6232f34

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