Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional Manancial UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/17289 |
Resumo: | The present research had the objective of verifying the efficiency of the thermorectificated in vegetal oil in the improvement of the durability of the wood of Eucalyptus cloeziana and Eucaliptus grandis submitted to biodegradation in field test. To achieve this, five trees of each species were randomly selected to prepare the samples. The thermorectificated was performed in a laboratory oil bath at 130 ° C, 160 ° C, 190 ° C and 220 ° C for 2 and 4 hours. The field test was installed at the Federal University of Santa Maria, in the municipality of Santa Maria - RS. For the evaluation, samples were collected every three months in the 12-month period, totaling four samples, after each collection, the test specimens were arranged in an air-conditioned room until the mass stabilization. Then, we evaluated the deterioration index, weight loss and mechanical properties (static bending), physical properties (TUeq and WRE%) and superficial (wettability and colorimetry) tests of the Eucalyptus wood. The statistical analysis was performed in a 9x5 factorial arrangement, with nine levels for the thermal treatment factor and five levels for rotting field evaluations (collections) and Kruskal Wallis test when the data did not reach the normality and homogeneity of variance assumptions. The main results show that for the behavior index and weight loss the heat treatments were more satisfactory in relation to the control treatment, indicating a higher resistance to the treated wood. The mechanical properties were slightly altered in the thermal treatment and suffered smaller variations over the time of field exposure when compared to in natura wood. The physical properties were increased with thermal treatment and were generally more stable during the exposure time. The coloring of the wood was altered both by heat treatment and by the time of field exposure. The increase in temperature made the wood darker and decreased the color variation during the 360 days in the field. The wettability increased with the heat treatment, but remained more stable during the exposure period if it was lower at the end of 360 days in the treated woods. Therefore, the heat treatment in oil has more markedly altered the technological properties of the studied wood and was efficient in its maintenance during the period in rotting field. Therefore, it is recommended to use heat-treated wood in oil (preferably with a temperature of 190 ° C and 220 ° C) in outdoor environments and in contact with the soil. |
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2019-07-04T12:02:04Z2019-07-04T12:02:04Z2019-03-11http://repositorio.ufsm.br/handle/1/17289The present research had the objective of verifying the efficiency of the thermorectificated in vegetal oil in the improvement of the durability of the wood of Eucalyptus cloeziana and Eucaliptus grandis submitted to biodegradation in field test. To achieve this, five trees of each species were randomly selected to prepare the samples. The thermorectificated was performed in a laboratory oil bath at 130 ° C, 160 ° C, 190 ° C and 220 ° C for 2 and 4 hours. The field test was installed at the Federal University of Santa Maria, in the municipality of Santa Maria - RS. For the evaluation, samples were collected every three months in the 12-month period, totaling four samples, after each collection, the test specimens were arranged in an air-conditioned room until the mass stabilization. Then, we evaluated the deterioration index, weight loss and mechanical properties (static bending), physical properties (TUeq and WRE%) and superficial (wettability and colorimetry) tests of the Eucalyptus wood. The statistical analysis was performed in a 9x5 factorial arrangement, with nine levels for the thermal treatment factor and five levels for rotting field evaluations (collections) and Kruskal Wallis test when the data did not reach the normality and homogeneity of variance assumptions. The main results show that for the behavior index and weight loss the heat treatments were more satisfactory in relation to the control treatment, indicating a higher resistance to the treated wood. The mechanical properties were slightly altered in the thermal treatment and suffered smaller variations over the time of field exposure when compared to in natura wood. The physical properties were increased with thermal treatment and were generally more stable during the exposure time. The coloring of the wood was altered both by heat treatment and by the time of field exposure. The increase in temperature made the wood darker and decreased the color variation during the 360 days in the field. The wettability increased with the heat treatment, but remained more stable during the exposure period if it was lower at the end of 360 days in the treated woods. Therefore, the heat treatment in oil has more markedly altered the technological properties of the studied wood and was efficient in its maintenance during the period in rotting field. Therefore, it is recommended to use heat-treated wood in oil (preferably with a temperature of 190 ° C and 220 ° C) in outdoor environments and in contact with the soil.A presente pesquisa teve por objetivo verificar a eficiência da termorretificação em óleo vegetal na melhoria da durabilidade das madeiras de Eucalyptus cloesiana e Eucaliptus grandis submetidos a biodegradação em ensaio de apodrecimento a campo. Para tal, foram confeccionados corpos de prova, a partir de cinco árvores de cada espécie. A termorretificação foi realizada em banho de óleo laboratorial a 130°C, 160°C, 190ºC e 220°C por 2 e 4 horas. O campo de apodrecimento foi instalado na Universidade Federal de Santa Maria, no município de Santa Maria – RS. Para avaliação foram realizadas coletas a cada três meses no período de 12 meses, totalizando 4 coletas, após cada coleta, os corpos de prova foram dispostos em câmara climatizada até a estabilização da massa. Em seguida foram avaliados Índice de comportamento, perda de massa e foram realizados ensaios mecânicos (Flexão estática), físicos (TUeq e WRE%) e superficiais (molhabilidade e colorimetria) das madeiras do gênero Eucalyptus. A análise estatística foi realizada em arranjo fatorial 9x5, com nove níveis para o fator modificação térmica e 5 níveis para avaliações de campo de apodrecimento (coletas) e teste Kruskal Wallis quando os dados não atingiram os pressupostos de normalidade e homogeneidade de variância. Os principais resultados mostraram que para o índice de comportamento e perda de massa os tratamentos térmicos se mostraram mais satisfatórios em relação ao tratamento controle, indicando uma maior resistência para a madeira tratada. As propriedades mecânicas, foram pouco alteradas no processo de termorretificação e sofreram menores variações ao longo do tempo de exposição a campo quando comparada a madeira in natura. As propriedades físicas melhoraram com a termorretificação e de maneira geral se mostraram mais estáveis durante o tempo de exposição. A coloração da madeira foi alterada tanto pela termorretificação quanto pelo tempo de exposição a campo. O aumento da temperatura tornou a madeira mais escura e diminuiu a variação de cor durante os 360 dias a campo. A molhabilidade aumentou com o tratamento de termorretificação, porém se manteve mais estável durante o período de exposição se mostrando menor ao final dos 360 dias a campo. Portanto, a termorretificação em óleo alterou de forma mais pronunciada as propriedades tecnológicas das madeiras estudadas e foi eficiente na sua manutenção durante o período em campo de apodrecimento. Dessa forma, recomenda-se o uso de madeira termorretificada em óleo (preferencialmente com temperatura de 190°C e 220ºC) em ambientes externos e em contato com o solo.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de Ciências RuraisPrograma de Pós-Graduação em Engenharia FlorestalUFSMBrasilRecursos Florestais e Engenharia FlorestalAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessCampo de apodrecimentoModificação térmicaPropriedades físicasCIELabMolhabilidadeField testThermal degradationPhysical propertiesWettabilityCNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTALDurabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetalDurability of gender woods Eucalyptus termorretificated in vegetable oilinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisGatto, Darci Albertohttp://lattes.cnpq.br/0592339091520248Santini, Elio Joséhttp://lattes.cnpq.br/1939844237237675Pedrazzi, Cristianehttp://lattes.cnpq.br/5167571704789298Vivian, Magnos Alanhttp://lattes.cnpq.br/3975099431239819http://lattes.cnpq.br/7736354121715174Andrade, Fernanda Regina5002000000036005009a7bf571-38c4-49bd-9c8b-8b343bded5fe2b0f8c29-247f-40b5-8fe0-04fec55f49470285882e-f5b8-432f-ad65-54769c51a1553363a379-7010-42a6-93bb-02ae3c1ae95b7c141303-05ef-480d-b74c-43e06104c73dreponame:Repositório Institucional Manancial UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGEF_2019_ANDRADE_FERNANDA.pdfDIS_PPGEF_2019_ANDRADE_FERNANDA.pdfDissertação de Mestradoapplication/pdf2141733http://repositorio.ufsm.br/bitstream/1/17289/1/DIS_PPGEF_2019_ANDRADE_FERNANDA.pdf736ecd0a1889b378d176b04fbbe7abb5MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal |
dc.title.alternative.eng.fl_str_mv |
Durability of gender woods Eucalyptus termorretificated in vegetable oil |
title |
Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal |
spellingShingle |
Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal Andrade, Fernanda Regina Campo de apodrecimento Modificação térmica Propriedades físicas CIELab Molhabilidade Field test Thermal degradation Physical properties Wettability CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
title_short |
Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal |
title_full |
Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal |
title_fullStr |
Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal |
title_full_unstemmed |
Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal |
title_sort |
Durabilidade de madeiras do gênero Eucalyptus termorretificadas em óleo vegetal |
author |
Andrade, Fernanda Regina |
author_facet |
Andrade, Fernanda Regina |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Gatto, Darci Alberto |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0592339091520248 |
dc.contributor.advisor-co1.fl_str_mv |
Santini, Elio José |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/1939844237237675 |
dc.contributor.referee1.fl_str_mv |
Pedrazzi, Cristiane |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/5167571704789298 |
dc.contributor.referee2.fl_str_mv |
Vivian, Magnos Alan |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/3975099431239819 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7736354121715174 |
dc.contributor.author.fl_str_mv |
Andrade, Fernanda Regina |
contributor_str_mv |
Gatto, Darci Alberto Santini, Elio José Pedrazzi, Cristiane Vivian, Magnos Alan |
dc.subject.por.fl_str_mv |
Campo de apodrecimento Modificação térmica Propriedades físicas CIELab Molhabilidade |
topic |
Campo de apodrecimento Modificação térmica Propriedades físicas CIELab Molhabilidade Field test Thermal degradation Physical properties Wettability CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
dc.subject.eng.fl_str_mv |
Field test Thermal degradation Physical properties Wettability |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
description |
The present research had the objective of verifying the efficiency of the thermorectificated in vegetal oil in the improvement of the durability of the wood of Eucalyptus cloeziana and Eucaliptus grandis submitted to biodegradation in field test. To achieve this, five trees of each species were randomly selected to prepare the samples. The thermorectificated was performed in a laboratory oil bath at 130 ° C, 160 ° C, 190 ° C and 220 ° C for 2 and 4 hours. The field test was installed at the Federal University of Santa Maria, in the municipality of Santa Maria - RS. For the evaluation, samples were collected every three months in the 12-month period, totaling four samples, after each collection, the test specimens were arranged in an air-conditioned room until the mass stabilization. Then, we evaluated the deterioration index, weight loss and mechanical properties (static bending), physical properties (TUeq and WRE%) and superficial (wettability and colorimetry) tests of the Eucalyptus wood. The statistical analysis was performed in a 9x5 factorial arrangement, with nine levels for the thermal treatment factor and five levels for rotting field evaluations (collections) and Kruskal Wallis test when the data did not reach the normality and homogeneity of variance assumptions. The main results show that for the behavior index and weight loss the heat treatments were more satisfactory in relation to the control treatment, indicating a higher resistance to the treated wood. The mechanical properties were slightly altered in the thermal treatment and suffered smaller variations over the time of field exposure when compared to in natura wood. The physical properties were increased with thermal treatment and were generally more stable during the exposure time. The coloring of the wood was altered both by heat treatment and by the time of field exposure. The increase in temperature made the wood darker and decreased the color variation during the 360 days in the field. The wettability increased with the heat treatment, but remained more stable during the exposure period if it was lower at the end of 360 days in the treated woods. Therefore, the heat treatment in oil has more markedly altered the technological properties of the studied wood and was efficient in its maintenance during the period in rotting field. Therefore, it is recommended to use heat-treated wood in oil (preferably with a temperature of 190 ° C and 220 ° C) in outdoor environments and in contact with the soil. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-07-04T12:02:04Z |
dc.date.available.fl_str_mv |
2019-07-04T12:02:04Z |
dc.date.issued.fl_str_mv |
2019-03-11 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/17289 |
url |
http://repositorio.ufsm.br/handle/1/17289 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
500200000003 |
dc.relation.confidence.fl_str_mv |
600 500 |
dc.relation.authority.fl_str_mv |
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dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Rurais |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Florestal |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Recursos Florestais e Engenharia Florestal |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Rurais |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional Manancial UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
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UFSM |
institution |
UFSM |
reponame_str |
Repositório Institucional Manancial UFSM |
collection |
Repositório Institucional Manancial UFSM |
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