Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process

Autores
Giudice, Carlos Alberto; Alfieri, Paula Vanesa; 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 sol–gel 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 ≡Si–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.
Fil: Giudice, Carlos Alberto. Universidad Tecnologica Nacional; Argentina
Fil: Alfieri, Paula Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Tecnología de Pinturas (i); Argentina
Fil: Canosa, Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigación y Desarrollo En Tecnología de Pinturas (i); Argentina. Universidad Tecnologica Nacional; Argentina
Materia
Wood
Siloxane
Polyporus Meliae/Coriolus Versicolor
Dimensional Stability
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/11271
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel processGiudice, Carlos AlbertoAlfieri, Paula VanesaCanosa, GuadalupeWoodSiloxanePolyporus Meliae/Coriolus VersicolorDimensional Stabilityhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Solid 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/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 ≡Si–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.Fil: Giudice, Carlos Alberto. Universidad Tecnologica Nacional; ArgentinaFil: Alfieri, Paula Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Tecnología de Pinturas (i); ArgentinaFil: Canosa, Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigación y Desarrollo En Tecnología de Pinturas (i); Argentina. Universidad Tecnologica Nacional; ArgentinaElsevier2013-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/11271Giudice, Carlos Alberto; Alfieri, Paula Vanesa; Canosa, Guadalupe; Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process; Elsevier; International Biodeterioration And Biodegradation; 83; 9-2013; 163-1700964-8305enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0964830513001972info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ibiod.2013.05.015info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:43:35Zoai:ri.conicet.gov.ar:11336/11271instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:43:36.15CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process
title Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process
spellingShingle Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process
Giudice, Carlos Alberto
Wood
Siloxane
Polyporus Meliae/Coriolus Versicolor
Dimensional Stability
title_short Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process
title_full Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process
title_fullStr Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process
title_full_unstemmed Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process
title_sort Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process
dc.creator.none.fl_str_mv Giudice, Carlos Alberto
Alfieri, Paula Vanesa
Canosa, Guadalupe
author Giudice, Carlos Alberto
author_facet Giudice, Carlos Alberto
Alfieri, Paula Vanesa
Canosa, Guadalupe
author_role author
author2 Alfieri, Paula Vanesa
Canosa, Guadalupe
author2_role author
author
dc.subject.none.fl_str_mv Wood
Siloxane
Polyporus Meliae/Coriolus Versicolor
Dimensional Stability
topic Wood
Siloxane
Polyporus Meliae/Coriolus Versicolor
Dimensional Stability
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv 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/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 ≡Si–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.
Fil: Giudice, Carlos Alberto. Universidad Tecnologica Nacional; Argentina
Fil: Alfieri, Paula Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Tecnología de Pinturas (i); Argentina
Fil: Canosa, Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigación y Desarrollo En Tecnología de Pinturas (i); Argentina. Universidad Tecnologica Nacional; Argentina
description 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/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 ≡Si–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.
publishDate 2013
dc.date.none.fl_str_mv 2013-09
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/11336/11271
Giudice, Carlos Alberto; Alfieri, Paula Vanesa; Canosa, Guadalupe; Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process; Elsevier; International Biodeterioration And Biodegradation; 83; 9-2013; 163-170
0964-8305
url http://hdl.handle.net/11336/11271
identifier_str_mv Giudice, Carlos Alberto; Alfieri, Paula Vanesa; Canosa, Guadalupe; Decay resistance and dimensional stability of Araucaria angustifolia using siloxanes synthesized by sol-gel process; Elsevier; International Biodeterioration And Biodegradation; 83; 9-2013; 163-170
0964-8305
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0964830513001972
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ibiod.2013.05.015
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842268612098785280
score 13.13397

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