Pattern of alkali impregnation of poplar wood at moderate conditions

Autores
Zanuttini, Miguel Angel Mario; Citroni, Miguel Angel; Marzocchi, Victorio Angel
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The impregnation pattern of alkali in fresh Cottonwood is analysed. Isothermal process, medium alkali-concentration, temperature below 100°C and tangential direction are considered. The degree of deacetylation in the wood is taken as an indicator of the whole chemical action of the alkali. Profiles of alkali concentration, alkali content, liquid content and acetyl content in the wood are experimentally determined. The results show that wood behaves rather like a glassy polymeric solid placed in contact with a solvent. An advancing boundary zone is established which separates an intact inner part from the outer swollen zone. Alkali concentration and acetyl groups content profiles can approximately be described by a model used to analyse the reaction of solids: the shrinking core model. The chemical reaction in the front is the controlling mechanism. The swelling of the cell walls together with the occupation of the hollow cavities of the wood by the liquor make it possible for the wood liquid content to increase up to almost 3 g liquid g wood-1. The procedure here adopted and the impregnation pattern proposed are valuable tools to analyse the effect of wood direction and process variables such as temperature, alkali concentration and initial wood moisture. They could also be very useful to build a model for alkaline impregnation of wood under moderate conditions.
Fil: Zanuttini, Miguel Angel Mario. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Fil: Citroni, Miguel Angel. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Fil: Marzocchi, Victorio Angel. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina
Materia
Acetyl Groups
Alkali Concentration
Alkali Content
Alkali Impregnation
Alkaline Pulping
Liquor Penetration
Liquor Uptake
Poplar
Shrinking Core Model
Swelling
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:11336/72378
Acceder
id CONICETDig_e566d0429d4087ca37d4efc447cd85a0
oai_identifier_str oai:ri.conicet.gov.ar:11336/72378
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Pattern of alkali impregnation of poplar wood at moderate conditionsZanuttini, Miguel Angel MarioCitroni, Miguel AngelMarzocchi, Victorio AngelAcetyl GroupsAlkali ConcentrationAlkali ContentAlkali ImpregnationAlkaline PulpingLiquor PenetrationLiquor UptakePoplarShrinking Core ModelSwellinghttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2The impregnation pattern of alkali in fresh Cottonwood is analysed. Isothermal process, medium alkali-concentration, temperature below 100°C and tangential direction are considered. The degree of deacetylation in the wood is taken as an indicator of the whole chemical action of the alkali. Profiles of alkali concentration, alkali content, liquid content and acetyl content in the wood are experimentally determined. The results show that wood behaves rather like a glassy polymeric solid placed in contact with a solvent. An advancing boundary zone is established which separates an intact inner part from the outer swollen zone. Alkali concentration and acetyl groups content profiles can approximately be described by a model used to analyse the reaction of solids: the shrinking core model. The chemical reaction in the front is the controlling mechanism. The swelling of the cell walls together with the occupation of the hollow cavities of the wood by the liquor make it possible for the wood liquid content to increase up to almost 3 g liquid g wood-1. The procedure here adopted and the impregnation pattern proposed are valuable tools to analyse the effect of wood direction and process variables such as temperature, alkali concentration and initial wood moisture. They could also be very useful to build a model for alkaline impregnation of wood under moderate conditions.Fil: Zanuttini, Miguel Angel Mario. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Citroni, Miguel Angel. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Marzocchi, Victorio Angel. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; ArgentinaDe Gruyter2000-10info: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/11336/72378Zanuttini, Miguel Angel Mario; Citroni, Miguel Angel; Marzocchi, Victorio Angel; Pattern of alkali impregnation of poplar wood at moderate conditions; De Gruyter; Holzforschung; 54; 6; 10-2000; 631-6360018-3830CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.degruyter.com/view/j/hfsg.2000.54.issue-6/hf.2000.106/hf.2000.106.xmlinfo:eu-repo/semantics/altIdentifier/doi/10.1515/HF.2000.106info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:36Zoai:ri.conicet.gov.ar:11336/72378instacron: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:34982025-09-29 09:48:36.968CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Pattern of alkali impregnation of poplar wood at moderate conditions
title Pattern of alkali impregnation of poplar wood at moderate conditions
spellingShingle Pattern of alkali impregnation of poplar wood at moderate conditions
Zanuttini, Miguel Angel Mario
Acetyl Groups
Alkali Concentration
Alkali Content
Alkali Impregnation
Alkaline Pulping
Liquor Penetration
Liquor Uptake
Poplar
Shrinking Core Model
Swelling
title_short Pattern of alkali impregnation of poplar wood at moderate conditions
title_full Pattern of alkali impregnation of poplar wood at moderate conditions
title_fullStr Pattern of alkali impregnation of poplar wood at moderate conditions
title_full_unstemmed Pattern of alkali impregnation of poplar wood at moderate conditions
title_sort Pattern of alkali impregnation of poplar wood at moderate conditions
dc.creator.none.fl_str_mv Zanuttini, Miguel Angel Mario
Citroni, Miguel Angel
Marzocchi, Victorio Angel
author Zanuttini, Miguel Angel Mario
author_facet Zanuttini, Miguel Angel Mario
Citroni, Miguel Angel
Marzocchi, Victorio Angel
author_role author
author2 Citroni, Miguel Angel
Marzocchi, Victorio Angel
author2_role author
author
dc.subject.none.fl_str_mv Acetyl Groups
Alkali Concentration
Alkali Content
Alkali Impregnation
Alkaline Pulping
Liquor Penetration
Liquor Uptake
Poplar
Shrinking Core Model
Swelling
topic Acetyl Groups
Alkali Concentration
Alkali Content
Alkali Impregnation
Alkaline Pulping
Liquor Penetration
Liquor Uptake
Poplar
Shrinking Core Model
Swelling
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The impregnation pattern of alkali in fresh Cottonwood is analysed. Isothermal process, medium alkali-concentration, temperature below 100°C and tangential direction are considered. The degree of deacetylation in the wood is taken as an indicator of the whole chemical action of the alkali. Profiles of alkali concentration, alkali content, liquid content and acetyl content in the wood are experimentally determined. The results show that wood behaves rather like a glassy polymeric solid placed in contact with a solvent. An advancing boundary zone is established which separates an intact inner part from the outer swollen zone. Alkali concentration and acetyl groups content profiles can approximately be described by a model used to analyse the reaction of solids: the shrinking core model. The chemical reaction in the front is the controlling mechanism. The swelling of the cell walls together with the occupation of the hollow cavities of the wood by the liquor make it possible for the wood liquid content to increase up to almost 3 g liquid g wood-1. The procedure here adopted and the impregnation pattern proposed are valuable tools to analyse the effect of wood direction and process variables such as temperature, alkali concentration and initial wood moisture. They could also be very useful to build a model for alkaline impregnation of wood under moderate conditions.
Fil: Zanuttini, Miguel Angel Mario. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Fil: Citroni, Miguel Angel. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Fil: Marzocchi, Victorio Angel. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina
description The impregnation pattern of alkali in fresh Cottonwood is analysed. Isothermal process, medium alkali-concentration, temperature below 100°C and tangential direction are considered. The degree of deacetylation in the wood is taken as an indicator of the whole chemical action of the alkali. Profiles of alkali concentration, alkali content, liquid content and acetyl content in the wood are experimentally determined. The results show that wood behaves rather like a glassy polymeric solid placed in contact with a solvent. An advancing boundary zone is established which separates an intact inner part from the outer swollen zone. Alkali concentration and acetyl groups content profiles can approximately be described by a model used to analyse the reaction of solids: the shrinking core model. The chemical reaction in the front is the controlling mechanism. The swelling of the cell walls together with the occupation of the hollow cavities of the wood by the liquor make it possible for the wood liquid content to increase up to almost 3 g liquid g wood-1. The procedure here adopted and the impregnation pattern proposed are valuable tools to analyse the effect of wood direction and process variables such as temperature, alkali concentration and initial wood moisture. They could also be very useful to build a model for alkaline impregnation of wood under moderate conditions.
publishDate 2000
dc.date.none.fl_str_mv 2000-10
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/11336/72378
Zanuttini, Miguel Angel Mario; Citroni, Miguel Angel; Marzocchi, Victorio Angel; Pattern of alkali impregnation of poplar wood at moderate conditions; De Gruyter; Holzforschung; 54; 6; 10-2000; 631-636
0018-3830
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72378
identifier_str_mv Zanuttini, Miguel Angel Mario; Citroni, Miguel Angel; Marzocchi, Victorio Angel; Pattern of alkali impregnation of poplar wood at moderate conditions; De Gruyter; Holzforschung; 54; 6; 10-2000; 631-636
0018-3830
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.degruyter.com/view/j/hfsg.2000.54.issue-6/hf.2000.106/hf.2000.106.xml
info:eu-repo/semantics/altIdentifier/doi/10.1515/HF.2000.106
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 De Gruyter
publisher.none.fl_str_mv De Gruyter
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_ 1844613508717608960
score 13.070432

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