Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.26525/jtfs2020.32.4.333 http://hdl.handle.net/11449/205472 |
Resumo: | In the Brazilian Atlantic Forest, the pioneer species Schizolobium parahyba, known as guapuruvu, is a fastgrowing tree with potential for ecological restoration in forest management projects. However, an undesirable feature of this wood is the pronounced presence of juvenile wood leading to poor dimensional stability. This study evaluates the effect of various thermal modification intensities on the physicochemical properties of S. parahyba juvenile and mature wood. Boards sawn from 15-year-old trees were thermally modified at three different temperatures (180, 200 and 220 °C). Thermal modification decreased the density (up to 9%), moisture content (up to 9.1%) and volumetric swelling (up to 54.1%). For chemical properties, when the wood was submitted to thermal modification at 220 °C, significant increase was detected in the respective extractive (up to 286.5%) and lignin content (up to 41.7%), and reduction in the holoceluloses (up to 25.0%). It was demonstrated that basic density was not the most suitable parameter for evaluating the quality of thermally modified wood. The influence of thermal modification was equal in juvenile and mature wood. |
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Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modificationDensity of woodDimensional stabilityGuapuruvuHolocelluloses contentThermally modified woodIn the Brazilian Atlantic Forest, the pioneer species Schizolobium parahyba, known as guapuruvu, is a fastgrowing tree with potential for ecological restoration in forest management projects. However, an undesirable feature of this wood is the pronounced presence of juvenile wood leading to poor dimensional stability. This study evaluates the effect of various thermal modification intensities on the physicochemical properties of S. parahyba juvenile and mature wood. Boards sawn from 15-year-old trees were thermally modified at three different temperatures (180, 200 and 220 °C). Thermal modification decreased the density (up to 9%), moisture content (up to 9.1%) and volumetric swelling (up to 54.1%). For chemical properties, when the wood was submitted to thermal modification at 220 °C, significant increase was detected in the respective extractive (up to 286.5%) and lignin content (up to 41.7%), and reduction in the holoceluloses (up to 25.0%). It was demonstrated that basic density was not the most suitable parameter for evaluating the quality of thermally modified wood. The influence of thermal modification was equal in juvenile and mature wood.FCA UNESP, Fazenda Experimental Lageado s/nFCA UNESP, Fazenda Experimental Lageado s/nUniversidade Estadual Paulista (Unesp)Calonego, F. W. [UNESP]Severo, E. T.D. [UNESP]Sansígolo, C. A. [UNESP]De Brito, A. F. [UNESP]2021-06-25T10:15:53Z2021-06-25T10:15:53Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article333-340http://dx.doi.org/10.26525/jtfs2020.32.4.333Journal of Tropical Forest Science, v. 32, n. 4, p. 333-340, 2020.0128-1283http://hdl.handle.net/11449/20547210.26525/jtfs2020.32.4.3332-s2.0-85096128906Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Tropical Forest Scienceinfo:eu-repo/semantics/openAccess2021-10-23T14:34:00Zoai:repositorio.unesp.br:11449/205472Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:08:06.674512Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification |
title |
Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification |
spellingShingle |
Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification Calonego, F. W. [UNESP] Density of wood Dimensional stability Guapuruvu Holocelluloses content Thermally modified wood |
title_short |
Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification |
title_full |
Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification |
title_fullStr |
Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification |
title_full_unstemmed |
Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification |
title_sort |
Physical and chemical changes in juvenile and mature wood of shizolobium parahyba caused by thermal modification |
author |
Calonego, F. W. [UNESP] |
author_facet |
Calonego, F. W. [UNESP] Severo, E. T.D. [UNESP] Sansígolo, C. A. [UNESP] De Brito, A. F. [UNESP] |
author_role |
author |
author2 |
Severo, E. T.D. [UNESP] Sansígolo, C. A. [UNESP] De Brito, A. F. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Calonego, F. W. [UNESP] Severo, E. T.D. [UNESP] Sansígolo, C. A. [UNESP] De Brito, A. F. [UNESP] |
dc.subject.por.fl_str_mv |
Density of wood Dimensional stability Guapuruvu Holocelluloses content Thermally modified wood |
topic |
Density of wood Dimensional stability Guapuruvu Holocelluloses content Thermally modified wood |
description |
In the Brazilian Atlantic Forest, the pioneer species Schizolobium parahyba, known as guapuruvu, is a fastgrowing tree with potential for ecological restoration in forest management projects. However, an undesirable feature of this wood is the pronounced presence of juvenile wood leading to poor dimensional stability. This study evaluates the effect of various thermal modification intensities on the physicochemical properties of S. parahyba juvenile and mature wood. Boards sawn from 15-year-old trees were thermally modified at three different temperatures (180, 200 and 220 °C). Thermal modification decreased the density (up to 9%), moisture content (up to 9.1%) and volumetric swelling (up to 54.1%). For chemical properties, when the wood was submitted to thermal modification at 220 °C, significant increase was detected in the respective extractive (up to 286.5%) and lignin content (up to 41.7%), and reduction in the holoceluloses (up to 25.0%). It was demonstrated that basic density was not the most suitable parameter for evaluating the quality of thermally modified wood. The influence of thermal modification was equal in juvenile and mature wood. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 2021-06-25T10:15:53Z 2021-06-25T10:15:53Z |
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://dx.doi.org/10.26525/jtfs2020.32.4.333 Journal of Tropical Forest Science, v. 32, n. 4, p. 333-340, 2020. 0128-1283 http://hdl.handle.net/11449/205472 10.26525/jtfs2020.32.4.333 2-s2.0-85096128906 |
url |
http://dx.doi.org/10.26525/jtfs2020.32.4.333 http://hdl.handle.net/11449/205472 |
identifier_str_mv |
Journal of Tropical Forest Science, v. 32, n. 4, p. 333-340, 2020. 0128-1283 10.26525/jtfs2020.32.4.333 2-s2.0-85096128906 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Tropical Forest Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
333-340 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129395965034496 |