Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/31248 |
Resumo: | This study investigates the changes in color and in the chemical structures of the surface of curupixá wood (Micropholis sp.), which was exposed to artificial weathering with two wood finishing products. We treated the sample surfaces with varnish and stain, and then we set them to artificial weathering for 700 hours, in accordance with ASTM G154 (2006). Our team used The Fourier Transform Mean Infrared (FT-MIR) and the CIELAB (1976) system in order to outline changes in the chemical and colorimetric structure of the wood surface, respectively. The color of curupixá wood got darker after applying finishing products. The color variation following the weathering process was appreciable in the control sample and very appreciable in the treated wood sample. The analysis of medium infrared spectroscopy demonstrated the depolymerization of lignin accompanied by the formation of carbonyls in all cases. In addition, mid-infrared displayed a concentration drop due to the heavy metal leaching. These ocurrences reveal degradation in the structural chemical components of the wood, and that the finishing products did not affect the weathering process at all. |
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Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing productsColorimetria e espectroscopia no infravermelho médio em madeira de curupixá frente ao intemperismo artificial com produtos de acabamentoWood surfacePhotodegradationVarnishStainSuperfície da madeiraFotodegradaçãoVernizStainThis study investigates the changes in color and in the chemical structures of the surface of curupixá wood (Micropholis sp.), which was exposed to artificial weathering with two wood finishing products. We treated the sample surfaces with varnish and stain, and then we set them to artificial weathering for 700 hours, in accordance with ASTM G154 (2006). Our team used The Fourier Transform Mean Infrared (FT-MIR) and the CIELAB (1976) system in order to outline changes in the chemical and colorimetric structure of the wood surface, respectively. The color of curupixá wood got darker after applying finishing products. The color variation following the weathering process was appreciable in the control sample and very appreciable in the treated wood sample. The analysis of medium infrared spectroscopy demonstrated the depolymerization of lignin accompanied by the formation of carbonyls in all cases. In addition, mid-infrared displayed a concentration drop due to the heavy metal leaching. These ocurrences reveal degradation in the structural chemical components of the wood, and that the finishing products did not affect the weathering process at all.O objetivo do estudo foi investigar alterações de cor e de estruturas químicas da superfície da madeira de curupixá (Micropholis sp.), submetida ao intemperismo artificial, com dois produtos de acabamento. As superfícies das amostras foram tratadas com verniz e stain, e submetidas ao intemperismo artificial por 700 horas de acordo com a norma ASTM G154 (2006). O infravermelho médio com transformada de Fourier (FT-MIR) e o sistema CIELAB (1976) foram utilizados para caracterizar mudanças na estrutura química e colorimétricas da superfície da madeira, respectivamente. Em relação à cor, a madeira de curupixá escureceu com a aplicação dos produtos de acabamento. O intemperismo alterou de forma apreciável a cor da testemunha, e de forma muito apreciável a madeira tratada com os dois produtos de acabamento. A análise de espectroscopia no infravermelho médio mostrou que, em todos os casos, sucedeu a despolimerização da lignina acompanhada da formação de carbonilas, além de queda em suas concentrações devido à lixiviação dos metais pesados. Tudo isso indica que houve degradação dos componentes químicos estruturais da madeira e que não houve influência dos produtos de acabamento no processo de intemperismo.Universidade Federal de Santa Maria2020-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/3124810.5902/1980509831248Ciência Florestal; Vol. 30 No. 3 (2020); 688-699Ciência Florestal; v. 30 n. 3 (2020); 688-6991980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/31248/33575Copyright (c) 2020 Ciência Florestalinfo:eu-repo/semantics/openAccessMesquita, Robert Rossi Silva dePaula, Marcella Hermida deGonçalez, Joaquim Carlos2020-09-02T20:52:05Zoai:ojs.pkp.sfu.ca:article/31248Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2020-09-02T20:52:05Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products Colorimetria e espectroscopia no infravermelho médio em madeira de curupixá frente ao intemperismo artificial com produtos de acabamento |
title |
Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products |
spellingShingle |
Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products Mesquita, Robert Rossi Silva de Wood surface Photodegradation Varnish Stain Superfície da madeira Fotodegradação Verniz Stain |
title_short |
Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products |
title_full |
Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products |
title_fullStr |
Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products |
title_full_unstemmed |
Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products |
title_sort |
Mid-infrared spectroscopy and colorimetry of curupixá wood: artificial weathering along with finishing products |
author |
Mesquita, Robert Rossi Silva de |
author_facet |
Mesquita, Robert Rossi Silva de Paula, Marcella Hermida de Gonçalez, Joaquim Carlos |
author_role |
author |
author2 |
Paula, Marcella Hermida de Gonçalez, Joaquim Carlos |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Mesquita, Robert Rossi Silva de Paula, Marcella Hermida de Gonçalez, Joaquim Carlos |
dc.subject.por.fl_str_mv |
Wood surface Photodegradation Varnish Stain Superfície da madeira Fotodegradação Verniz Stain |
topic |
Wood surface Photodegradation Varnish Stain Superfície da madeira Fotodegradação Verniz Stain |
description |
This study investigates the changes in color and in the chemical structures of the surface of curupixá wood (Micropholis sp.), which was exposed to artificial weathering with two wood finishing products. We treated the sample surfaces with varnish and stain, and then we set them to artificial weathering for 700 hours, in accordance with ASTM G154 (2006). Our team used The Fourier Transform Mean Infrared (FT-MIR) and the CIELAB (1976) system in order to outline changes in the chemical and colorimetric structure of the wood surface, respectively. The color of curupixá wood got darker after applying finishing products. The color variation following the weathering process was appreciable in the control sample and very appreciable in the treated wood sample. The analysis of medium infrared spectroscopy demonstrated the depolymerization of lignin accompanied by the formation of carbonyls in all cases. In addition, mid-infrared displayed a concentration drop due to the heavy metal leaching. These ocurrences reveal degradation in the structural chemical components of the wood, and that the finishing products did not affect the weathering process at all. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/31248 10.5902/1980509831248 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/31248 |
identifier_str_mv |
10.5902/1980509831248 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/31248/33575 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2020 Ciência Florestal info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2020 Ciência Florestal |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 30 No. 3 (2020); 688-699 Ciência Florestal; v. 30 n. 3 (2020); 688-699 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944133105680384 |