The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites

Autores
Cordero, Andrés Ignacio; Amalvy, Javier; Fortunati, Elena; Kenny, José María; Chiacchiarelli, Leonel Matías
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nanocrystalline cellulose (CNC), obtained by sulphuric acid hydrolysis, was used to synthesize polyurethane foams (PUFs) based on a functionalized castor oil polyol and a Methylene diphenyl diiso- cyanate (MDI). Formulations with varying isocyanate index (FI) and NCO number were prepared. At 0.5 wt.%, SEM’s of the fractured surface underlined that the CNC acted both as a nucleation agent and as a particulate surfactant with cell geometries and apparent density changing selectively. The chemical structure of the PUF (FTIR) changed after the incorporation of CNC by a relative change of the amount of urea, urethane and isocyanurate groups. A low NCO number and isocyanate index contributed to the migration of the CNC to the Hard Segment (HS), acting as reinforcement and improving substantially the compressive mechanical properties (Ec and �����c improvements of 63 and 50%, respectively). For a high NCO number or isocyanate index, the CNC migrated to the Soft Segment (SS), without causing a reinforcement effect. The migration of the CNC was also detected with DSC, TGA and DMA, furtherly supporting the hypothesis that a low NCO number and index contributed both to the formation of a microstructure with a higher content of urethane groups.
Fil: Cordero, Andrés Ignacio. INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas). CONICET; Argentina
Fil: Amalvy, Javier. UNLP (Universidad Nacional de La Plata). INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas). CONICET. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas) CONICET/CICPBA. UTN (Universidad Tecnológica Nacional). CITEMA (Centro de Investigación y Desarrollo en Ciencia y Tecnología de Materiales); Argentina
Fil: Fortunati, Elena. University of Perugia. Materials Engineering Center. UdR INSTM; Italy
Fil: Kenny, José María. University of Perugia. Materials Engineering Center. UdR INSTM; Italy
Fil: Chiacchiarelli, Leonel Matías. ITPN (Instituto de Tecnología de Polímeros y Nanotecnología). CONICET-UBA; Argentina
Peer Reviewed
Materia
Polyurethane foams, Castor oil polyol, Nanocrystalline cellulose, Mechanical properties, Thermal properties
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/3412
Acceder
id RIAUTN_27318fac8a873044e6feb4027a070e55
oai_identifier_str oai:ria.utn.edu.ar:20.500.12272/3412
network_acronym_str RIAUTN
repository_id_str a
network_name_str Repositorio Institucional Abierto (UTN)
spelling The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocompositesCordero, Andrés IgnacioAmalvy, JavierFortunati, ElenaKenny, José MaríaChiacchiarelli, Leonel MatíasPolyurethane foams, Castor oil polyol, Nanocrystalline cellulose, Mechanical properties, Thermal propertiesNanocrystalline cellulose (CNC), obtained by sulphuric acid hydrolysis, was used to synthesize polyurethane foams (PUFs) based on a functionalized castor oil polyol and a Methylene diphenyl diiso- cyanate (MDI). Formulations with varying isocyanate index (FI) and NCO number were prepared. At 0.5 wt.%, SEM’s of the fractured surface underlined that the CNC acted both as a nucleation agent and as a particulate surfactant with cell geometries and apparent density changing selectively. The chemical structure of the PUF (FTIR) changed after the incorporation of CNC by a relative change of the amount of urea, urethane and isocyanurate groups. A low NCO number and isocyanate index contributed to the migration of the CNC to the Hard Segment (HS), acting as reinforcement and improving substantially the compressive mechanical properties (Ec and �����c improvements of 63 and 50%, respectively). For a high NCO number or isocyanate index, the CNC migrated to the Soft Segment (SS), without causing a reinforcement effect. The migration of the CNC was also detected with DSC, TGA and DMA, furtherly supporting the hypothesis that a low NCO number and index contributed both to the formation of a microstructure with a higher content of urethane groups.Fil: Cordero, Andrés Ignacio. INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas). CONICET; ArgentinaFil: Amalvy, Javier. UNLP (Universidad Nacional de La Plata). INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas). CONICET. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas) CONICET/CICPBA. UTN (Universidad Tecnológica Nacional). CITEMA (Centro de Investigación y Desarrollo en Ciencia y Tecnología de Materiales); ArgentinaFil: Fortunati, Elena. University of Perugia. Materials Engineering Center. UdR INSTM; ItalyFil: Kenny, José María. University of Perugia. Materials Engineering Center. UdR INSTM; ItalyFil: Chiacchiarelli, Leonel Matías. ITPN (Instituto de Tecnología de Polímeros y Nanotecnología). CONICET-UBA; ArgentinaPeer Reviewed2019-02-02T23:08:57Z2019-02-02T23:08:57Z2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfCarbohydrate Polymershttp://hdl.handle.net/20.500.12272/341210.1016/j.carbpol.2015.07.077enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Elsevier Ltd.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.).Attribution-NonCommercial-NoDerivatives 4.0 Internacionalreponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacional2025-09-29T14:29:45Zoai:ria.utn.edu.ar:20.500.12272/3412instacron: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:a2025-09-29 14:29:46.09Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites
title The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites
spellingShingle The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites
Cordero, Andrés Ignacio
Polyurethane foams, Castor oil polyol, Nanocrystalline cellulose, Mechanical properties, Thermal properties
title_short The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites
title_full The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites
title_fullStr The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites
title_full_unstemmed The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites
title_sort The role of nanocrystalline cellulose on the microstructure of foamed castor-oil polyurethane nanocomposites
dc.creator.none.fl_str_mv Cordero, Andrés Ignacio
Amalvy, Javier
Fortunati, Elena
Kenny, José María
Chiacchiarelli, Leonel Matías
author Cordero, Andrés Ignacio
author_facet Cordero, Andrés Ignacio
Amalvy, Javier
Fortunati, Elena
Kenny, José María
Chiacchiarelli, Leonel Matías
author_role author
author2 Amalvy, Javier
Fortunati, Elena
Kenny, José María
Chiacchiarelli, Leonel Matías
author2_role author
author
author
author
dc.subject.none.fl_str_mv Polyurethane foams, Castor oil polyol, Nanocrystalline cellulose, Mechanical properties, Thermal properties
topic Polyurethane foams, Castor oil polyol, Nanocrystalline cellulose, Mechanical properties, Thermal properties
dc.description.none.fl_txt_mv Nanocrystalline cellulose (CNC), obtained by sulphuric acid hydrolysis, was used to synthesize polyurethane foams (PUFs) based on a functionalized castor oil polyol and a Methylene diphenyl diiso- cyanate (MDI). Formulations with varying isocyanate index (FI) and NCO number were prepared. At 0.5 wt.%, SEM’s of the fractured surface underlined that the CNC acted both as a nucleation agent and as a particulate surfactant with cell geometries and apparent density changing selectively. The chemical structure of the PUF (FTIR) changed after the incorporation of CNC by a relative change of the amount of urea, urethane and isocyanurate groups. A low NCO number and isocyanate index contributed to the migration of the CNC to the Hard Segment (HS), acting as reinforcement and improving substantially the compressive mechanical properties (Ec and �����c improvements of 63 and 50%, respectively). For a high NCO number or isocyanate index, the CNC migrated to the Soft Segment (SS), without causing a reinforcement effect. The migration of the CNC was also detected with DSC, TGA and DMA, furtherly supporting the hypothesis that a low NCO number and index contributed both to the formation of a microstructure with a higher content of urethane groups.
Fil: Cordero, Andrés Ignacio. INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas). CONICET; Argentina
Fil: Amalvy, Javier. UNLP (Universidad Nacional de La Plata). INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas). CONICET. CIDEPINT (Centro de Investigación y Desarrollo en Tecnología de Pinturas) CONICET/CICPBA. UTN (Universidad Tecnológica Nacional). CITEMA (Centro de Investigación y Desarrollo en Ciencia y Tecnología de Materiales); Argentina
Fil: Fortunati, Elena. University of Perugia. Materials Engineering Center. UdR INSTM; Italy
Fil: Kenny, José María. University of Perugia. Materials Engineering Center. UdR INSTM; Italy
Fil: Chiacchiarelli, Leonel Matías. ITPN (Instituto de Tecnología de Polímeros y Nanotecnología). CONICET-UBA; Argentina
Peer Reviewed
description Nanocrystalline cellulose (CNC), obtained by sulphuric acid hydrolysis, was used to synthesize polyurethane foams (PUFs) based on a functionalized castor oil polyol and a Methylene diphenyl diiso- cyanate (MDI). Formulations with varying isocyanate index (FI) and NCO number were prepared. At 0.5 wt.%, SEM’s of the fractured surface underlined that the CNC acted both as a nucleation agent and as a particulate surfactant with cell geometries and apparent density changing selectively. The chemical structure of the PUF (FTIR) changed after the incorporation of CNC by a relative change of the amount of urea, urethane and isocyanurate groups. A low NCO number and isocyanate index contributed to the migration of the CNC to the Hard Segment (HS), acting as reinforcement and improving substantially the compressive mechanical properties (Ec and �����c improvements of 63 and 50%, respectively). For a high NCO number or isocyanate index, the CNC migrated to the Soft Segment (SS), without causing a reinforcement effect. The migration of the CNC was also detected with DSC, TGA and DMA, furtherly supporting the hypothesis that a low NCO number and index contributed both to the formation of a microstructure with a higher content of urethane groups.
publishDate 2015
dc.date.none.fl_str_mv 2015
2019-02-02T23:08:57Z
2019-02-02T23:08:57Z
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 Carbohydrate Polymers
http://hdl.handle.net/20.500.12272/3412
10.1016/j.carbpol.2015.07.077
identifier_str_mv Carbohydrate Polymers
10.1016/j.carbpol.2015.07.077
url http://hdl.handle.net/20.500.12272/3412
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Elsevier Ltd.
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.).
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Elsevier Ltd.
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.).
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.format.none.fl_str_mv application/pdf
application/pdf
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
_version_ 1844621792266682368
score 12.559606

Publicaciones similares