Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process

Autores
Giúdice, Carlos Alberto; Alfieri, Paula; Canosa, Guadalupe
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Solid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the solegel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl triethoxysilane; it was also used the aminopropyl methyldiethoxysilane/aminopropyl triethoxysilane mixture in 50/50 ratio w/w. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Impregnation process was carried out under controlled operating conditions to achieve different weight gains of the chemical modifier. Unmodified and modified wood specimens were exposed to brown rot (Polyporus meliae) and white rot (Coriolus versicolor) under laboratory conditions. The results indicate that the improved resistance to fungal exposure would be based on the wood chemical modification (the protection of cellulose caused by steric hindrance of hSieOeCellulose preventing the formation of enzymeesubstrate complex). Moreover, the results also would be based on the enhanced dimensional stability of the treated wood; the quoted high dimensional stability, which limits the growth of the spores, is supported in the hydrophobicity generated by both the decreasing of the amount of polar hydroxyl groups and the partial occupation of pores with polysiloxanes.
Fil: Canosa, Guadalupe. UTN (Universidad Tecnológica Nacional); Argentina
Fil: Alfieri, Paula V. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina
Fil: Giúdice, Carlos Alberto. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina
Peer Reviewed
Materia
wood; siloxane; rot; polyporus meliae; coriolus versicolor; dimensional stability
Nivel de accesibilidad
acceso abierto
Condiciones de uso
Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.). Compartir igual (Share Alike): La explotación autorizada incluye la creación de obras derivadas siempre que se mantenga la misma licencia al ser divulgadas.
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/2202
Acceder
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network_acronym_str RIAUTN
repository_id_str a
network_name_str Repositorio Institucional Abierto (UTN)
spelling Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel processGiúdice, Carlos AlbertoAlfieri, PaulaCanosa, Guadalupewood; siloxane; rot; polyporus meliae; coriolus versicolor; dimensional stabilitySolid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the solegel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl triethoxysilane; it was also used the aminopropyl methyldiethoxysilane/aminopropyl triethoxysilane mixture in 50/50 ratio w/w. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Impregnation process was carried out under controlled operating conditions to achieve different weight gains of the chemical modifier. Unmodified and modified wood specimens were exposed to brown rot (Polyporus meliae) and white rot (Coriolus versicolor) under laboratory conditions. The results indicate that the improved resistance to fungal exposure would be based on the wood chemical modification (the protection of cellulose caused by steric hindrance of hSieOeCellulose preventing the formation of enzymeesubstrate complex). Moreover, the results also would be based on the enhanced dimensional stability of the treated wood; the quoted high dimensional stability, which limits the growth of the spores, is supported in the hydrophobicity generated by both the decreasing of the amount of polar hydroxyl groups and the partial occupation of pores with polysiloxanes.Fil: Canosa, Guadalupe. UTN (Universidad Tecnológica Nacional); ArgentinaFil: Alfieri, Paula V. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); ArgentinaFil: Giúdice, Carlos Alberto. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); ArgentinaPeer ReviewedElsevier2017-10-25T19:51:33Z2017-10-25T19:51:33Z2013-05-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/20.500.12272/2202enginfo:eu-repo/semantics/openAccessAtribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.). Compartir igual (Share Alike): La explotación autorizada incluye la creación de obras derivadas siempre que se mantenga la misma licencia al ser divulgadas.reponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacional2025-10-23T11:18:48Zoai:ria.utn.edu.ar:20.500.12272/2202instacron:UTNInstitucionalhttp://ria.utn.edu.ar/Universidad públicaNo correspondehttp://ria.utn.edu.ar/oaigestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:a2025-10-23 11:18:48.621Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
title Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
spellingShingle Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
Giúdice, Carlos Alberto
wood; siloxane; rot; polyporus meliae; coriolus versicolor; dimensional stability
title_short Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
title_full Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
title_fullStr Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
title_full_unstemmed Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
title_sort Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by solegel process
dc.creator.none.fl_str_mv Giúdice, Carlos Alberto
Alfieri, Paula
Canosa, Guadalupe
author Giúdice, Carlos Alberto
author_facet Giúdice, Carlos Alberto
Alfieri, Paula
Canosa, Guadalupe
author_role author
author2 Alfieri, Paula
Canosa, Guadalupe
author2_role author
author
dc.subject.none.fl_str_mv wood; siloxane; rot; polyporus meliae; coriolus versicolor; dimensional stability
topic wood; siloxane; rot; polyporus meliae; coriolus versicolor; dimensional stability
dc.description.none.fl_txt_mv Solid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the solegel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl triethoxysilane; it was also used the aminopropyl methyldiethoxysilane/aminopropyl triethoxysilane mixture in 50/50 ratio w/w. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Impregnation process was carried out under controlled operating conditions to achieve different weight gains of the chemical modifier. Unmodified and modified wood specimens were exposed to brown rot (Polyporus meliae) and white rot (Coriolus versicolor) under laboratory conditions. The results indicate that the improved resistance to fungal exposure would be based on the wood chemical modification (the protection of cellulose caused by steric hindrance of hSieOeCellulose preventing the formation of enzymeesubstrate complex). Moreover, the results also would be based on the enhanced dimensional stability of the treated wood; the quoted high dimensional stability, which limits the growth of the spores, is supported in the hydrophobicity generated by both the decreasing of the amount of polar hydroxyl groups and the partial occupation of pores with polysiloxanes.
Fil: Canosa, Guadalupe. UTN (Universidad Tecnológica Nacional); Argentina
Fil: Alfieri, Paula V. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina
Fil: Giúdice, Carlos Alberto. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina
Peer Reviewed
description Solid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the solegel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl triethoxysilane; it was also used the aminopropyl methyldiethoxysilane/aminopropyl triethoxysilane mixture in 50/50 ratio w/w. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Impregnation process was carried out under controlled operating conditions to achieve different weight gains of the chemical modifier. Unmodified and modified wood specimens were exposed to brown rot (Polyporus meliae) and white rot (Coriolus versicolor) under laboratory conditions. The results indicate that the improved resistance to fungal exposure would be based on the wood chemical modification (the protection of cellulose caused by steric hindrance of hSieOeCellulose preventing the formation of enzymeesubstrate complex). Moreover, the results also would be based on the enhanced dimensional stability of the treated wood; the quoted high dimensional stability, which limits the growth of the spores, is supported in the hydrophobicity generated by both the decreasing of the amount of polar hydroxyl groups and the partial occupation of pores with polysiloxanes.
publishDate 2013
dc.date.none.fl_str_mv 2013-05-16
2017-10-25T19:51:33Z
2017-10-25T19:51:33Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12272/2202
url http://hdl.handle.net/20.500.12272/2202
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.). Compartir igual (Share Alike): La explotación autorizada incluye la creación de obras derivadas siempre que se mantenga la misma licencia al ser divulgadas.
eu_rights_str_mv openAccess
rights_invalid_str_mv Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.). Compartir igual (Share Alike): La explotación autorizada incluye la creación de obras derivadas siempre que se mantenga la misma licencia al ser divulgadas.
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositorio Institucional Abierto (UTN)
instname:Universidad Tecnológica Nacional
reponame_str Repositorio Institucional Abierto (UTN)
collection Repositorio Institucional Abierto (UTN)
instname_str Universidad Tecnológica Nacional
repository.name.fl_str_mv Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacional
repository.mail.fl_str_mv gestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.ar
_version_ 1846787946715283456
score 12.471625

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