Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering

In this work Eucalyptus grandis and Dipteryx odorata were submitted to photodegradation by ultraviolet radiation. The effect of ultraviolet radiation irradiation on the color change and chemical composition of each wood flour were evaluated. The samples were submitted to a total of 500h of artificia...

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Autor principal:	Poletto,Matheus
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2017
Materias:	Color change FTIR lignin photodegradation wood
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2017000200002
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spelling	oai:scielo:S0718-221X20170002000022017-05-02Comparative study of wood flour photodegradation of two wood species submitted to artificial weatheringPoletto,Matheus Color change FTIR lignin photodegradation wood In this work Eucalyptus grandis and Dipteryx odorata were submitted to photodegradation by ultraviolet radiation. The effect of ultraviolet radiation irradiation on the color change and chemical composition of each wood flour were evaluated. The samples were submitted to a total of 500h of artificial weathering using condensation stages and ultraviolet radiation B irradiation cycles. The changes in wood flour color were monitored by spectrocolorimetry, while the changes in wood chemical composition were evaluated by Fourier transform infrared spectroscopy. Both species showed changes in color with increased exposure time to artificial weathering. For both wood species the variation in color change was considered very appreciable after 500h. The Eucalyptus grandis specie showed appreciable color change after 120h, while for Dipteryx odorata specie the color change is appreciable only after 240h. The Fourier transform infrared spectroscopy results showed that lignin was strongly degrades by ultraviolet radiation radiation in both species. However, Dipteryx odorata was more resistant to photodegradation than Eucalyptus grandis, probably due to lower lignin content in this wood. The results clearly indicated that for the wood species studied the rate of weathering is influenced by wood species.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.19 n.2 20172017-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2017000200002en10.4067/S0718-221X2017005000012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Color change FTIR lignin photodegradation wood
spellingShingle	Color change FTIR lignin photodegradation wood Poletto,Matheus Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering
description	In this work Eucalyptus grandis and Dipteryx odorata were submitted to photodegradation by ultraviolet radiation. The effect of ultraviolet radiation irradiation on the color change and chemical composition of each wood flour were evaluated. The samples were submitted to a total of 500h of artificial weathering using condensation stages and ultraviolet radiation B irradiation cycles. The changes in wood flour color were monitored by spectrocolorimetry, while the changes in wood chemical composition were evaluated by Fourier transform infrared spectroscopy. Both species showed changes in color with increased exposure time to artificial weathering. For both wood species the variation in color change was considered very appreciable after 500h. The Eucalyptus grandis specie showed appreciable color change after 120h, while for Dipteryx odorata specie the color change is appreciable only after 240h. The Fourier transform infrared spectroscopy results showed that lignin was strongly degrades by ultraviolet radiation radiation in both species. However, Dipteryx odorata was more resistant to photodegradation than Eucalyptus grandis, probably due to lower lignin content in this wood. The results clearly indicated that for the wood species studied the rate of weathering is influenced by wood species.
author	Poletto,Matheus
author_facet	Poletto,Matheus
author_sort	Poletto,Matheus
title	Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering
title_short	Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering
title_full	Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering
title_fullStr	Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering
title_full_unstemmed	Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering
title_sort	comparative study of wood flour photodegradation of two wood species submitted to artificial weathering
publisher	Universidad del Bío-Bío
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2017000200002
work_keys_str_mv	AT polettomatheus comparativestudyofwoodflourphotodegradationoftwowoodspeciessubmittedtoartificialweathering
_version_	1714202635927552000

Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering

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