PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Cerne (Online) |
Texto Completo: | https://cerne.ufla.br/site/index.php/CERNE/article/view/1414 |
Resumo: | Wind may damage eucalyptus trees, especially 24 months after planting, which can reduce wood fiber quality and hinder pulp production. The objective of this study was to evaluate the use of these materials in mixtures with wood from seven-year-old trees to produce pulp. Bleached pulp was produced using 100, 95, 85, 75 and 0% wood from seven-year-old eucalyptus trees, related to cutting age. Wood from two-year-old trees, when trees are most susceptible to damage by wind, completed each treatment. A 5 cm thick disc was taken from breast height (1.3m) on each tree for anatomical and ultrastructural characterization. The seven-year-old wood had lower vessel frequency and fibers with a longer length, higher cell wall fraction, higher modulus of elasticity and hardness, and a lower microfibril angle. Pulp refining decreased the opacity and specific volume, increased air resistance and improved mechanical properties. The addition of two-year-old wood to produce pulp reduced the mechanical properties and opacity, and increased the air resistance of the paper. The proportion of two-year-old wood that can be used in pulp production varied with the clone, parameter, and refining level. However, the pulp produced with 5% wood from two-year-old trees and 95% wood from seven-year-old trees was similar to that with 100% seven-year-old wood. Therefore, 5% two-year-old wood can be used to produce pulp without quality losses. |
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PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WINDFiberNanoindentationOpacityTear indexTensile indexWind may damage eucalyptus trees, especially 24 months after planting, which can reduce wood fiber quality and hinder pulp production. The objective of this study was to evaluate the use of these materials in mixtures with wood from seven-year-old trees to produce pulp. Bleached pulp was produced using 100, 95, 85, 75 and 0% wood from seven-year-old eucalyptus trees, related to cutting age. Wood from two-year-old trees, when trees are most susceptible to damage by wind, completed each treatment. A 5 cm thick disc was taken from breast height (1.3m) on each tree for anatomical and ultrastructural characterization. The seven-year-old wood had lower vessel frequency and fibers with a longer length, higher cell wall fraction, higher modulus of elasticity and hardness, and a lower microfibril angle. Pulp refining decreased the opacity and specific volume, increased air resistance and improved mechanical properties. The addition of two-year-old wood to produce pulp reduced the mechanical properties and opacity, and increased the air resistance of the paper. The proportion of two-year-old wood that can be used in pulp production varied with the clone, parameter, and refining level. However, the pulp produced with 5% wood from two-year-old trees and 95% wood from seven-year-old trees was similar to that with 100% seven-year-old wood. Therefore, 5% two-year-old wood can be used to produce pulp without quality losses.CERNECERNE2016-12-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://cerne.ufla.br/site/index.php/CERNE/article/view/1414CERNE; Vol. 22 No. 4 (2016); 485-492CERNE; v. 22 n. 4 (2016); 485-4922317-63420104-7760reponame:Cerne (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttps://cerne.ufla.br/site/index.php/CERNE/article/view/1414/959Copyright (c) 2016 CERNEinfo:eu-repo/semantics/openAccessZanuncio, Antonio Jose VinhaCarvalho, Amélia GuimarãesCarneiro, Angelica de Cassia OliveiraDamasio, Renato Augusto PereiraValenzuela, PaulinaGacitúa, WilliamColodette, Jorge Luiz2017-03-08T09:12:55Zoai:cerne.ufla.br:article/1414Revistahttps://cerne.ufla.br/site/index.php/CERNEPUBhttps://cerne.ufla.br/site/index.php/CERNE/oaicerne@dcf.ufla.br||cerne@dcf.ufla.br2317-63420104-7760opendoar:2024-05-21T19:54:30.394791Cerne (Online) - Universidade Federal de Lavras (UFLA)true |
dc.title.none.fl_str_mv |
PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND |
title |
PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND |
spellingShingle |
PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND Zanuncio, Antonio Jose Vinha Fiber Nanoindentation Opacity Tear index Tensile index |
title_short |
PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND |
title_full |
PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND |
title_fullStr |
PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND |
title_full_unstemmed |
PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND |
title_sort |
PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND |
author |
Zanuncio, Antonio Jose Vinha |
author_facet |
Zanuncio, Antonio Jose Vinha Carvalho, Amélia Guimarães Carneiro, Angelica de Cassia Oliveira Damasio, Renato Augusto Pereira Valenzuela, Paulina Gacitúa, William Colodette, Jorge Luiz |
author_role |
author |
author2 |
Carvalho, Amélia Guimarães Carneiro, Angelica de Cassia Oliveira Damasio, Renato Augusto Pereira Valenzuela, Paulina Gacitúa, William Colodette, Jorge Luiz |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Zanuncio, Antonio Jose Vinha Carvalho, Amélia Guimarães Carneiro, Angelica de Cassia Oliveira Damasio, Renato Augusto Pereira Valenzuela, Paulina Gacitúa, William Colodette, Jorge Luiz |
dc.subject.por.fl_str_mv |
Fiber Nanoindentation Opacity Tear index Tensile index |
topic |
Fiber Nanoindentation Opacity Tear index Tensile index |
description |
Wind may damage eucalyptus trees, especially 24 months after planting, which can reduce wood fiber quality and hinder pulp production. The objective of this study was to evaluate the use of these materials in mixtures with wood from seven-year-old trees to produce pulp. Bleached pulp was produced using 100, 95, 85, 75 and 0% wood from seven-year-old eucalyptus trees, related to cutting age. Wood from two-year-old trees, when trees are most susceptible to damage by wind, completed each treatment. A 5 cm thick disc was taken from breast height (1.3m) on each tree for anatomical and ultrastructural characterization. The seven-year-old wood had lower vessel frequency and fibers with a longer length, higher cell wall fraction, higher modulus of elasticity and hardness, and a lower microfibril angle. Pulp refining decreased the opacity and specific volume, increased air resistance and improved mechanical properties. The addition of two-year-old wood to produce pulp reduced the mechanical properties and opacity, and increased the air resistance of the paper. The proportion of two-year-old wood that can be used in pulp production varied with the clone, parameter, and refining level. However, the pulp produced with 5% wood from two-year-old trees and 95% wood from seven-year-old trees was similar to that with 100% seven-year-old wood. Therefore, 5% two-year-old wood can be used to produce pulp without quality losses. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12-23 |
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://cerne.ufla.br/site/index.php/CERNE/article/view/1414 |
url |
https://cerne.ufla.br/site/index.php/CERNE/article/view/1414 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://cerne.ufla.br/site/index.php/CERNE/article/view/1414/959 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2016 CERNE info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2016 CERNE |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
CERNE CERNE |
publisher.none.fl_str_mv |
CERNE CERNE |
dc.source.none.fl_str_mv |
CERNE; Vol. 22 No. 4 (2016); 485-492 CERNE; v. 22 n. 4 (2016); 485-492 2317-6342 0104-7760 reponame:Cerne (Online) instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Cerne (Online) |
collection |
Cerne (Online) |
repository.name.fl_str_mv |
Cerne (Online) - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
cerne@dcf.ufla.br||cerne@dcf.ufla.br |
_version_ |
1799874943250333696 |