Performance of wood impregnated with alkoxysilanes

Autores
Canosa, Guadalupe; Alfieri, Paula; Giúdice, Carlos Alberto
Año de publicación
2016
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The wood, very heterogeneous and complex material, changes its volume by water absorption or desorption causing swelling or shrinkage and also it can be degraded both by action of microorganisms and fire; the above-mentioned is a great inconvenient for most commercial uses. Solid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the sol-gel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl triethoxysilane; it was also used the aminopropyl methyldiethoxysilane/aminopropil triethoxysilane mixture in 50/50 w/w ratio. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Impregnation process was carried out at 45–50 oC in an autoclave, controlling the operating conditions for achieving different weight gains. 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 c emical modification (t e protection of cellulose caused by steric indrance of i-O-Cellulose preventing the formation of enzyme-substrate 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. Fire laboratory tests were carried out in Two-Foot Tunnel (flame spread index, panel consumption and smoke density) and in TGA detector (mass loss). The performance can be explained according the reactivity of the alkoxides; the results indicate that as weight gain increase the performance of impregnants against fire also does.
Fil: Canosa, Guadalupe. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.
Fil: Alfieri, Paula V. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.
Fil: Giúdice, Carlos A. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.
Peer Reviewed
Materia
Wood
Alkoxysilane
Decay resistance
Dimensional stability
Fire
Nivel de accesibilidad
acceso abierto
Condiciones de uso
2017-11-06T13:58:41Z
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/2287
Acceder
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oai_identifier_str oai:ria.utn.edu.ar:20.500.12272/2287
network_acronym_str RIAUTN
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network_name_str Repositorio Institucional Abierto (UTN)
spelling Performance of wood impregnated with alkoxysilanesCanosa, GuadalupeAlfieri, PaulaGiúdice, Carlos AlbertoWoodAlkoxysilaneDecay resistanceDimensional stabilityFireThe wood, very heterogeneous and complex material, changes its volume by water absorption or desorption causing swelling or shrinkage and also it can be degraded both by action of microorganisms and fire; the above-mentioned is a great inconvenient for most commercial uses. Solid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the sol-gel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl triethoxysilane; it was also used the aminopropyl methyldiethoxysilane/aminopropil triethoxysilane mixture in 50/50 w/w ratio. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Impregnation process was carried out at 45–50 oC in an autoclave, controlling the operating conditions for achieving different weight gains. 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 c emical modification (t e protection of cellulose caused by steric indrance of i-O-Cellulose preventing the formation of enzyme-substrate 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. Fire laboratory tests were carried out in Two-Foot Tunnel (flame spread index, panel consumption and smoke density) and in TGA detector (mass loss). The performance can be explained according the reactivity of the alkoxides; the results indicate that as weight gain increase the performance of impregnants against fire also does. Fil: Canosa, Guadalupe. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.Fil: Alfieri, Paula V. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.Fil: Giúdice, Carlos A. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.Peer ReviewedREHABEND2017-11-06T13:58:41Z2017-11-06T13:58:41Z2016-05-24info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersiondocunento de conferenciahttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/20.500.12272/2287engenginfo:eu-repo/semantics/openAccess2017-11-06T13:58:41ZAtribución (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 Nacional2026-09-24T12:48:59Zoai:ria.utn.edu.ar:20.500.12272/2287instacron: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:a2026-09-24 12:49:00.663Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv Performance of wood impregnated with alkoxysilanes
title Performance of wood impregnated with alkoxysilanes
spellingShingle Performance of wood impregnated with alkoxysilanes
Canosa, Guadalupe
Wood
Alkoxysilane
Decay resistance
Dimensional stability
Fire
title_short Performance of wood impregnated with alkoxysilanes
title_full Performance of wood impregnated with alkoxysilanes
title_fullStr Performance of wood impregnated with alkoxysilanes
title_full_unstemmed Performance of wood impregnated with alkoxysilanes
title_sort Performance of wood impregnated with alkoxysilanes
dc.creator.none.fl_str_mv Canosa, Guadalupe
Alfieri, Paula
Giúdice, Carlos Alberto
author Canosa, Guadalupe
author_facet Canosa, Guadalupe
Alfieri, Paula
Giúdice, Carlos Alberto
author_role author
author2 Alfieri, Paula
Giúdice, Carlos Alberto
author2_role author
author
dc.subject.none.fl_str_mv Wood
Alkoxysilane
Decay resistance
Dimensional stability
Fire
topic Wood
Alkoxysilane
Decay resistance
Dimensional stability
Fire
dc.description.none.fl_txt_mv The wood, very heterogeneous and complex material, changes its volume by water absorption or desorption causing swelling or shrinkage and also it can be degraded both by action of microorganisms and fire; the above-mentioned is a great inconvenient for most commercial uses. Solid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the sol-gel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl triethoxysilane; it was also used the aminopropyl methyldiethoxysilane/aminopropil triethoxysilane mixture in 50/50 w/w ratio. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Impregnation process was carried out at 45–50 oC in an autoclave, controlling the operating conditions for achieving different weight gains. 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 c emical modification (t e protection of cellulose caused by steric indrance of i-O-Cellulose preventing the formation of enzyme-substrate 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. Fire laboratory tests were carried out in Two-Foot Tunnel (flame spread index, panel consumption and smoke density) and in TGA detector (mass loss). The performance can be explained according the reactivity of the alkoxides; the results indicate that as weight gain increase the performance of impregnants against fire also does.
Fil: Canosa, Guadalupe. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.
Fil: Alfieri, Paula V. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.
Fil: Giúdice, Carlos A. UTN (Universidad Tecnológica Nacional); Argentina. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas); Argentina.
Peer Reviewed
description The wood, very heterogeneous and complex material, changes its volume by water absorption or desorption causing swelling or shrinkage and also it can be degraded both by action of microorganisms and fire; the above-mentioned is a great inconvenient for most commercial uses. Solid wood specimens of Araucaria angustifolia were impregnated with alkoxysilanes hydrolyzed and condensed “in situ” by the sol-gel process. Alkoxysilanes selected were aminopropyl methyldiethoxysilane and aminopropyl triethoxysilane; it was also used the aminopropyl methyldiethoxysilane/aminopropil triethoxysilane mixture in 50/50 w/w ratio. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Impregnation process was carried out at 45–50 oC in an autoclave, controlling the operating conditions for achieving different weight gains. 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 c emical modification (t e protection of cellulose caused by steric indrance of i-O-Cellulose preventing the formation of enzyme-substrate 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. Fire laboratory tests were carried out in Two-Foot Tunnel (flame spread index, panel consumption and smoke density) and in TGA detector (mass loss). The performance can be explained according the reactivity of the alkoxides; the results indicate that as weight gain increase the performance of impregnants against fire also does.
publishDate 2016
dc.date.none.fl_str_mv 2016-05-24
2017-11-06T13:58:41Z
2017-11-06T13:58:41Z
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
docunento de conferencia
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12272/2287
url http://hdl.handle.net/20.500.12272/2287
dc.language.none.fl_str_mv eng
eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
2017-11-06T13:58:41Z
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 2017-11-06T13:58:41Z
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 REHABEND
publisher.none.fl_str_mv REHABEND
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
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score 13.24418

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