Photodegradation of wood at elevated temperature: colour change.
Identifieur interne : 002963 ( Main/Exploration ); précédent : 002962; suivant : 002964Photodegradation of wood at elevated temperature: colour change.
Auteurs : Laszlo Persze [Hongrie] ; Laszlo TolvajSource :
- Journal of photochemistry and photobiology. B, Biology [ 1873-2682 ] ; 2012.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemistry : Wood.
- radiation effects : Wood.
- Color, Light, Photolysis, Temperature.
Abstract
The purpose of this investigation was to evaluate the effect of elevated temperature on the photodegradation of solid wood. The work presented here, dealt with the changes of colour during the degradation process. Wood samples were irradiated by mercury vapour lamp at 80°C and at 30°C to screen out the effect of thermal decomposition during photodegradation. Results demonstrated that the same light irradiation resulted in considerably greater redness increase at 80°C than at 30°C. Pine samples showed 57% higher redness change at 80°C than at 30°C during the 200h light exposure. Corresponding data for spruce, ash and poplar were 33%, 40% and 15%, respectively. Results indicated that the extractive content has an important role in thermal decomposition during photodegradation. The elevated environmental temperature did not affect yellowness.
DOI: 10.1016/j.jphotobiol.2011.12.008
PubMed: 22257630
Affiliations:
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B, Biology</title><idno type="eISSN">1873-2682</idno><imprint><date when="2012" type="published">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Color (MeSH)</term><term>Light (MeSH)</term><term>Photolysis (MeSH)</term><term>Temperature (MeSH)</term><term>Wood (chemistry)</term><term>Wood (radiation effects)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Bois (composition chimique)</term><term>Bois (effets des radiations)</term><term>Couleur (MeSH)</term><term>Lumière (MeSH)</term><term>Photolyse (MeSH)</term><term>Température (MeSH)</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Wood</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Bois</term></keywords><keywords scheme="MESH" qualifier="effets des radiations" xml:lang="fr"><term>Bois</term></keywords><keywords scheme="MESH" qualifier="radiation effects" xml:lang="en"><term>Wood</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Color</term><term>Light</term><term>Photolysis</term><term>Temperature</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Couleur</term><term>Lumière</term><term>Photolyse</term><term>Température</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The purpose of this investigation was to evaluate the effect of elevated temperature on the photodegradation of solid wood. The work presented here, dealt with the changes of colour during the degradation process. Wood samples were irradiated by mercury vapour lamp at 80°C and at 30°C to screen out the effect of thermal decomposition during photodegradation. Results demonstrated that the same light irradiation resulted in considerably greater redness increase at 80°C than at 30°C. Pine samples showed 57% higher redness change at 80°C than at 30°C during the 200h light exposure. Corresponding data for spruce, ash and poplar were 33%, 40% and 15%, respectively. Results indicated that the extractive content has an important role in thermal decomposition during photodegradation. The elevated environmental temperature did not affect yellowness.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">22257630</PMID><DateCompleted><Year>2012</Year><Month>05</Month><Day>22</Day></DateCompleted><DateRevised><Year>2012</Year><Month>02</Month><Day>07</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1873-2682</ISSN><JournalIssue CitedMedium="Internet"><Volume>108</Volume><PubDate><Year>2012</Year><Month>Mar</Month><Day>01</Day></PubDate></JournalIssue><Title>Journal of photochemistry and photobiology. B, Biology</Title><ISOAbbreviation>J Photochem Photobiol B</ISOAbbreviation></Journal><ArticleTitle>Photodegradation of wood at elevated temperature: colour change.</ArticleTitle><Pagination><MedlinePgn>44-7</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.jphotobiol.2011.12.008</ELocationID><Abstract><AbstractText>The purpose of this investigation was to evaluate the effect of elevated temperature on the photodegradation of solid wood. The work presented here, dealt with the changes of colour during the degradation process. Wood samples were irradiated by mercury vapour lamp at 80°C and at 30°C to screen out the effect of thermal decomposition during photodegradation. Results demonstrated that the same light irradiation resulted in considerably greater redness increase at 80°C than at 30°C. Pine samples showed 57% higher redness change at 80°C than at 30°C during the 200h light exposure. Corresponding data for spruce, ash and poplar were 33%, 40% and 15%, respectively. Results indicated that the extractive content has an important role in thermal decomposition during photodegradation. The elevated environmental temperature did not affect yellowness.</AbstractText><CopyrightInformation>Copyright © 2012 Elsevier B.V. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Persze</LastName><ForeName>Laszlo</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>University of West Hungary, Sopron, Hungary.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Tolvaj</LastName><ForeName>Laszlo</ForeName><Initials>L</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2011</Year><Month>12</Month><Day>24</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>J Photochem Photobiol B</MedlineTA><NlmUniqueID>8804966</NlmUniqueID><ISSNLinking>1011-1344</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D003116" MajorTopicYN="Y">Color</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008027" MajorTopicYN="N">Light</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010782" MajorTopicYN="Y">Photolysis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013696" MajorTopicYN="Y">Temperature</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014934" MajorTopicYN="N">Wood</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000528" MajorTopicYN="Y">radiation effects</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2011</Year><Month>08</Month><Day>22</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2011</Year><Month>11</Month><Day>03</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2011</Year><Month>12</Month><Day>18</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2012</Year><Month>1</Month><Day>20</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2012</Year><Month>1</Month><Day>20</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2012</Year><Month>5</Month><Day>23</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">22257630</ArticleId><ArticleId IdType="pii">S1011-1344(11)00274-0</ArticleId><ArticleId IdType="doi">10.1016/j.jphotobiol.2011.12.008</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Hongrie</li></country></list><tree><noCountry><name sortKey="Tolvaj, Laszlo" sort="Tolvaj, Laszlo" uniqKey="Tolvaj L" first="Laszlo" last="Tolvaj">Laszlo Tolvaj</name></noCountry><country name="Hongrie"><noRegion><name sortKey="Persze, Laszlo" sort="Persze, Laszlo" uniqKey="Persze L" first="Laszlo" last="Persze">Laszlo Persze</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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