EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose

Autores
Buffa, Juan Manuel; Grela, Maria Alejandra; Aranguren, Mirta Ines; Mucci, Veronica Lujan
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Two different methods of pH control were used in the synthesis of 2,2,6,6-tetramethylpiperidine-1-oxyl(TEMPO) oxidized cellulose nanocrystals (CNC) and the reaction kinetics and degree of oxidation wereinvestigated. In method I the media pH was controlled by addition of NaOH solution. The effect of theoxidant concentration (sodium hypochloride, NaClO) on the final degree of oxidation and crystallinity ofthe samples was investigated. Conditions for obtaining an optimum balance between high crystallinityand degree of oxidation were selected from those results. In method II, pH was fixed by using a buffersolution. Electron spin resonance (ESR) spectroscopy offered direct information of the decay of TEMPOconcentration under these conditions. The kinetics of the reaction was determined, finding a direct cor-relation between these results and those corresponding to the decay of the NaClO concentration and theadvance of the CNC degree of oxidation. Differences found between the two methods were analyzed.
Fil: Buffa, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina
Fil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina
Fil: Aranguren, Mirta Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina
Fil: Mucci, Veronica Lujan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina
Materia
Cellulose Nanocrystals
Tempo
Conductimetry
Epr
Esr
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5856
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocelluloseBuffa, Juan ManuelGrela, Maria AlejandraAranguren, Mirta InesMucci, Veronica LujanCellulose NanocrystalsTempoConductimetryEprEsrhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Two different methods of pH control were used in the synthesis of 2,2,6,6-tetramethylpiperidine-1-oxyl(TEMPO) oxidized cellulose nanocrystals (CNC) and the reaction kinetics and degree of oxidation wereinvestigated. In method I the media pH was controlled by addition of NaOH solution. The effect of theoxidant concentration (sodium hypochloride, NaClO) on the final degree of oxidation and crystallinity ofthe samples was investigated. Conditions for obtaining an optimum balance between high crystallinityand degree of oxidation were selected from those results. In method II, pH was fixed by using a buffersolution. Electron spin resonance (ESR) spectroscopy offered direct information of the decay of TEMPOconcentration under these conditions. The kinetics of the reaction was determined, finding a direct cor-relation between these results and those corresponding to the decay of the NaClO concentration and theadvance of the CNC degree of oxidation. Differences found between the two methods were analyzed.Fil: Buffa, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; ArgentinaFil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; ArgentinaFil: Aranguren, Mirta Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; ArgentinaFil: Mucci, Veronica Lujan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; ArgentinaElsevier2015-09-30info: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/11336/5856Buffa, Juan Manuel; Grela, Maria Alejandra; Aranguren, Mirta Ines; Mucci, Veronica Lujan; EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose; Elsevier; Carbohydrate Polymers; 136; 30-9-2015; 744-7490144-8617enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0144861715009595info:eu-repo/semantics/altIdentifier/doi/10.1016/j.carbpol.2015.09.094info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:24:29Zoai:ri.conicet.gov.ar:11336/5856instacron: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:34982025-09-10 13:24:29.86CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose
title EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose
spellingShingle EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose
Buffa, Juan Manuel
Cellulose Nanocrystals
Tempo
Conductimetry
Epr
Esr
title_short EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose
title_full EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose
title_fullStr EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose
title_full_unstemmed EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose
title_sort EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose
dc.creator.none.fl_str_mv Buffa, Juan Manuel
Grela, Maria Alejandra
Aranguren, Mirta Ines
Mucci, Veronica Lujan
author Buffa, Juan Manuel
author_facet Buffa, Juan Manuel
Grela, Maria Alejandra
Aranguren, Mirta Ines
Mucci, Veronica Lujan
author_role author
author2 Grela, Maria Alejandra
Aranguren, Mirta Ines
Mucci, Veronica Lujan
author2_role author
author
author
dc.subject.none.fl_str_mv Cellulose Nanocrystals
Tempo
Conductimetry
Epr
Esr
topic Cellulose Nanocrystals
Tempo
Conductimetry
Epr
Esr
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Two different methods of pH control were used in the synthesis of 2,2,6,6-tetramethylpiperidine-1-oxyl(TEMPO) oxidized cellulose nanocrystals (CNC) and the reaction kinetics and degree of oxidation wereinvestigated. In method I the media pH was controlled by addition of NaOH solution. The effect of theoxidant concentration (sodium hypochloride, NaClO) on the final degree of oxidation and crystallinity ofthe samples was investigated. Conditions for obtaining an optimum balance between high crystallinityand degree of oxidation were selected from those results. In method II, pH was fixed by using a buffersolution. Electron spin resonance (ESR) spectroscopy offered direct information of the decay of TEMPOconcentration under these conditions. The kinetics of the reaction was determined, finding a direct cor-relation between these results and those corresponding to the decay of the NaClO concentration and theadvance of the CNC degree of oxidation. Differences found between the two methods were analyzed.
Fil: Buffa, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina
Fil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina
Fil: Aranguren, Mirta Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina
Fil: Mucci, Veronica Lujan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina
description Two different methods of pH control were used in the synthesis of 2,2,6,6-tetramethylpiperidine-1-oxyl(TEMPO) oxidized cellulose nanocrystals (CNC) and the reaction kinetics and degree of oxidation wereinvestigated. In method I the media pH was controlled by addition of NaOH solution. The effect of theoxidant concentration (sodium hypochloride, NaClO) on the final degree of oxidation and crystallinity ofthe samples was investigated. Conditions for obtaining an optimum balance between high crystallinityand degree of oxidation were selected from those results. In method II, pH was fixed by using a buffersolution. Electron spin resonance (ESR) spectroscopy offered direct information of the decay of TEMPOconcentration under these conditions. The kinetics of the reaction was determined, finding a direct cor-relation between these results and those corresponding to the decay of the NaClO concentration and theadvance of the CNC degree of oxidation. Differences found between the two methods were analyzed.
publishDate 2015
dc.date.none.fl_str_mv 2015-09-30
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/11336/5856
Buffa, Juan Manuel; Grela, Maria Alejandra; Aranguren, Mirta Ines; Mucci, Veronica Lujan; EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose; Elsevier; Carbohydrate Polymers; 136; 30-9-2015; 744-749
0144-8617
url http://hdl.handle.net/11336/5856
identifier_str_mv Buffa, Juan Manuel; Grela, Maria Alejandra; Aranguren, Mirta Ines; Mucci, Veronica Lujan; EPR spectroscopy applied to the study of the TEMPO mediated oxidation of nanocellulose; Elsevier; Carbohydrate Polymers; 136; 30-9-2015; 744-749
0144-8617
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/S0144861715009595
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.carbpol.2015.09.094
info:eu-repo/semantics/altIdentifier/doi/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/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
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score 12.48226

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