Nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard Segment

"Bacterial nanocellulose (BNC) was used to synthesize rigid polyurethane foams (RPUFs) based on its reaction with the isocyanate precursor (ISO route) and also by using the conventional procedure (POL route). The results indicated that at only 0.1 wt. % of BNC, drastic improvements of specific...

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Autores principales: Chiacchiarelli, Leonel Matías, Benavides, Sara, Armanasco, Franco, Cerrutti, Patricia
Formato: Artículos de Publicaciones Periódicas acceptedVersion
Lenguaje:Inglés
Publicado: info
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CELULOSA BACTERIANA
BIOPOLIMEROS
ESPUMAS
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/3221
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Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-3221
record_format dspace
spelling I32-R138-123456789-32212022-12-07T13:06:38Z Nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard Segment Chiacchiarelli, Leonel Matías Benavides, Sara Armanasco, Franco Cerrutti, Patricia CELULOSA BACTERIANA BIOPOLIMEROS ESPUMAS "Bacterial nanocellulose (BNC) was used to synthesize rigid polyurethane foams (RPUFs) based on its reaction with the isocyanate precursor (ISO route) and also by using the conventional procedure (POL route). The results indicated that at only 0.1 wt. % of BNC, drastic improvements of specific elastic compressive modulus (+244.2 %) and strength (+77.5 %) were found. The reaction of BNC with the precursor was corroborated through the measurement of isocyanate number and the BNC caused a significant nucleation effect, decreasing the cell size up to 39.7%. DSC analysis revealed that the BNC had a strong effect on post-cure enthalpy, decreasing its value when the ISO route was implemented. DMA analysis revealed that the RPUFs developed using the ISO route proved to have an improved damping factor, regardless of BNC concentration. These results emphasize the importance of using the ISO route to achieve foamed nanocomposites with improved specific mechanical properties." info:eu-repo/date/embargoEnd/2022-01-27 2020-10-28T21:53:29Z 2020-10-28T21:53:29Z 2021-01 Artículos de Publicaciones Periódicas info:eu-repo/semantics/acceptedVersion 1097-4628 http://ri.itba.edu.ar/handle/123456789/3221 en info:eu-repo/semantics/altIdentifier/doi/10.1002/app.50520 info:eu-repo/semantics/embargoedAccess application/pdf
institution Instituto Tecnológico de Buenos Aires (ITBA)
institution_str I-32
repository_str R-138
collection Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA)
language Inglés
topic CELULOSA BACTERIANA
BIOPOLIMEROS
ESPUMAS
spellingShingle CELULOSA BACTERIANA
BIOPOLIMEROS
ESPUMAS
Chiacchiarelli, Leonel Matías
Benavides, Sara
Armanasco, Franco
Cerrutti, Patricia
Nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard Segment
topic_facet CELULOSA BACTERIANA
BIOPOLIMEROS
ESPUMAS
description "Bacterial nanocellulose (BNC) was used to synthesize rigid polyurethane foams (RPUFs) based on its reaction with the isocyanate precursor (ISO route) and also by using the conventional procedure (POL route). The results indicated that at only 0.1 wt. % of BNC, drastic improvements of specific elastic compressive modulus (+244.2 %) and strength (+77.5 %) were found. The reaction of BNC with the precursor was corroborated through the measurement of isocyanate number and the BNC caused a significant nucleation effect, decreasing the cell size up to 39.7%. DSC analysis revealed that the BNC had a strong effect on post-cure enthalpy, decreasing its value when the ISO route was implemented. DMA analysis revealed that the RPUFs developed using the ISO route proved to have an improved damping factor, regardless of BNC concentration. These results emphasize the importance of using the ISO route to achieve foamed nanocomposites with improved specific mechanical properties."
format Artículos de Publicaciones Periódicas
acceptedVersion
author Chiacchiarelli, Leonel Matías
Benavides, Sara
Armanasco, Franco
Cerrutti, Patricia
author_facet Chiacchiarelli, Leonel Matías
Benavides, Sara
Armanasco, Franco
Cerrutti, Patricia
author_sort Chiacchiarelli, Leonel Matías
title Nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard Segment
title_short Nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard Segment
title_full Nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard Segment
title_fullStr Nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard Segment
title_full_unstemmed Nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard Segment
title_sort nanostructured rigid polyurethane foams with improved specific thermo-mechanical properties using bacterial nanocellulose as a hard segment
publishDate info
url http://ri.itba.edu.ar/handle/123456789/3221
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