In-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose

"The incorporation of nanofillers and the use of biobased polyols might have a deleterious effect on the aging performance of rigid polyurethane foams (RPUFs) applied in the insulation and marine industries. To study this, RPUFs obtained from petroleum based (RPUF) and castor oil (RPUFRIC) poly...

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Autores principales: Diaz, Tomás Joaquin, Cerrutti, Patricia, Chiacchiarelli, Leonel Matías
Formato: Artículos de Publicaciones Periódicas acceptedVersion
Lenguaje:Inglés
Publicado: info
Materias:
BIOPOLIMEROS
ESPUMAS
CELULOSA BACTERIANA
POLIURETANOS
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/3875
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-3875
record_format dspace
spelling I32-R138-123456789-38752022-12-07T13:07:03Z In-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose Diaz, Tomás Joaquin Cerrutti, Patricia Chiacchiarelli, Leonel Matías BIOPOLIMEROS ESPUMAS CELULOSA BACTERIANA POLIURETANOS "The incorporation of nanofillers and the use of biobased polyols might have a deleterious effect on the aging performance of rigid polyurethane foams (RPUFs) applied in the insulation and marine industries. To study this, RPUFs obtained from petroleum based (RPUF) and castor oil (RPUFRIC) polyols were nanostructured with bacterial nanocellulose (BNC) up to 0.3 wt%. Water immersion experiments revealed that the normalized water absorption (NWA) at the steady state was not affected by lower BNC contents (<0.2 wt%). Higher BNC contents caused a complex effect on post-cure and foaming, generating cell size expansion as well as shrinkage. In-situ DMA aging analysis revealed that the specific storage modulus (E'sp) under flexural conditions of the RPUFRIC and RPUF decreased by a maximum amount of 7.27% and 6.19%, respectively. The effect of BNC on the E'sp was negligible, expect for the case of the RPUF, where higher BNC concentrations (>0.2 wt%) caused a decrease of up to 13.69%. The previous results reinforce the hypothesis that the incorporation of BNC in both conventional and biobased polyurethane systems do not cause significant changes on the aging performance of the resulting foams, provided that low BNC concentrations are employed." info:eu-repo/date/embargoEnd/2022-11-02 2022-05-10T17:55:20Z 2022-05-10T17:55:20Z 2021-11-02 Artículos de Publicaciones Periódicas info:eu-repo/semantics/acceptedVersion 1097-4628 http://ri.itba.edu.ar/handle/123456789/3875 en info:eu-repo/semantics/altIdentifier/doi/10.1002/app.51824 info:eu-repo/grantAgreement/CONICET/PIP/N0425/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/grantAgreement/ANPCyT/PICT/2015-N0475/AR. Ciudad Autónoma de Buenos Aires 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 BIOPOLIMEROS
ESPUMAS
CELULOSA BACTERIANA
POLIURETANOS
spellingShingle BIOPOLIMEROS
ESPUMAS
CELULOSA BACTERIANA
POLIURETANOS
Diaz, Tomás Joaquin
Cerrutti, Patricia
Chiacchiarelli, Leonel Matías
In-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose
topic_facet BIOPOLIMEROS
ESPUMAS
CELULOSA BACTERIANA
POLIURETANOS
description "The incorporation of nanofillers and the use of biobased polyols might have a deleterious effect on the aging performance of rigid polyurethane foams (RPUFs) applied in the insulation and marine industries. To study this, RPUFs obtained from petroleum based (RPUF) and castor oil (RPUFRIC) polyols were nanostructured with bacterial nanocellulose (BNC) up to 0.3 wt%. Water immersion experiments revealed that the normalized water absorption (NWA) at the steady state was not affected by lower BNC contents (<0.2 wt%). Higher BNC contents caused a complex effect on post-cure and foaming, generating cell size expansion as well as shrinkage. In-situ DMA aging analysis revealed that the specific storage modulus (E'sp) under flexural conditions of the RPUFRIC and RPUF decreased by a maximum amount of 7.27% and 6.19%, respectively. The effect of BNC on the E'sp was negligible, expect for the case of the RPUF, where higher BNC concentrations (>0.2 wt%) caused a decrease of up to 13.69%. The previous results reinforce the hypothesis that the incorporation of BNC in both conventional and biobased polyurethane systems do not cause significant changes on the aging performance of the resulting foams, provided that low BNC concentrations are employed."
format Artículos de Publicaciones Periódicas
acceptedVersion
author Diaz, Tomás Joaquin
Cerrutti, Patricia
Chiacchiarelli, Leonel Matías
author_facet Diaz, Tomás Joaquin
Cerrutti, Patricia
Chiacchiarelli, Leonel Matías
author_sort Diaz, Tomás Joaquin
title In-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose
title_short In-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose
title_full In-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose
title_fullStr In-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose
title_full_unstemmed In-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose
title_sort in-situ thermal aging of biobased and conventional rigid polyurethane foams nanostructured with bacterial nanocellulose
publishDate info
url http://ri.itba.edu.ar/handle/123456789/3875
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