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...
Guardado en:
Autores principales: | , , |
---|---|
Formato: | Artículos de Publicaciones Periódicas acceptedVersion |
Lenguaje: | Inglés |
Publicado: |
info
|
Materias: | |
Acceso en línea: | http://ri.itba.edu.ar/handle/123456789/3875 |
Aporte de: |
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 |
work_keys_str_mv |
AT diaztomasjoaquin insituthermalagingofbiobasedandconventionalrigidpolyurethanefoamsnanostructuredwithbacterialnanocellulose AT cerruttipatricia insituthermalagingofbiobasedandconventionalrigidpolyurethanefoamsnanostructuredwithbacterialnanocellulose AT chiacchiarellileonelmatias insituthermalagingofbiobasedandconventionalrigidpolyurethanefoamsnanostructuredwithbacterialnanocellulose |
_version_ |
1765660835629236224 |