Dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes

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. In this research, wood sp...

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Autores principales: Canosa, Guadalupe, Alfieri, Paula, Giudice, Carlos Alberto
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2017
Materias:
wood, impregnation, alkylalkoxysilane, dimensional stability, fire performance, decay resistance.
Acceso en línea:http://hdl.handle.net/20.500.12272/2197
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-2197
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic wood, impregnation, alkylalkoxysilane, dimensional stability, fire performance, decay resistance.
spellingShingle wood, impregnation, alkylalkoxysilane, dimensional stability, fire performance, decay resistance.
Canosa, Guadalupe
Alfieri, Paula
Giudice, Carlos Alberto
Dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes
topic_facet wood, impregnation, alkylalkoxysilane, dimensional stability, fire performance, decay resistance.
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. In this research, wood specimens of Pinus radiata were previously pretreated in a Soxhlet extractor for 2 hours with a solution of sodium hydroxide (activation of the cellulose) and then impregnated with alkylalkoxysilanes hydrolyzed and condensed "in situ" by the sol-gel process. Silanes selected were triethoxysilane, methyltriethoxysilane, n-propyltriethoxysilane, n-buthyltriethoxysilane and n-octhyltriethoxysilane. Impregnation process was carried out under controlled operating conditions to achieve similar weight gains of the chemical modifier. The pH was adjusted to alkaline value for controlling kinetic of hydrolysis and condensation reactions. Results indicated that dimensional stability increased with the increase of the length of the hydrocarbon chain of the alkoxydes, which would be based essentially on their enhanced hydrophobicity but without discarding the partial occupation of the pores by polymerized siloxanes and the interaction of alkoxides with cell wall components. In addition, wood specimens impregnated with mentioned alkylalkoxysilanes also showed an excellent fire performance and decay resistance.
format Artículo
publishedVersion
Artículo
author Canosa, Guadalupe
Alfieri, Paula
Giudice, Carlos Alberto
author_facet Canosa, Guadalupe
Alfieri, Paula
Giudice, Carlos Alberto
author_sort Canosa, Guadalupe
title Dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes
title_short Dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes
title_full Dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes
title_fullStr Dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes
title_full_unstemmed Dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes
title_sort dimensional stability, fire performance and decay resistance in wood impregnated with alkylalkoxysilanes
publishDate 2017
url http://hdl.handle.net/20.500.12272/2197
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AT alfieripaula dimensionalstabilityfireperformanceanddecayresistanceinwoodimpregnatedwithalkylalkoxysilanes
AT giudicecarlosalberto dimensionalstabilityfireperformanceanddecayresistanceinwoodimpregnatedwithalkylalkoxysilanes
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