Crosslinking starch/oat hull mixtures for use in composites with PLA
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Polímeros (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282019000300406 |
Resumo: | Abstract Modification of composite components has been proposed as a tool to improve their functional properties. The present work studied crosslinking of a starch/oat hull mixture by reactive extrusion with sodium trimetaphosphate (STMP), for application in composites with polylactic acid (PLA). The treated mixture was characterized regarding degree of substitution, FT-IR, and thermal properties. The native and modified mixtures were processed by injection molding, together with PLA and glycerol. The microstructure, mechanical properties, shrinkage, density, and thermal properties of the composites were determined. The FT-IR results, increase in phosphorus content and thermal stability after starch/fiber mixture treatment with STMP suggested the occurrence of crosslinking. Better interfacial adhesion between oat hulls and the polymeric matrix was observed in electron micrographs of the composites containing the modified components. Slight decreases in tensile strength and modulus were observed in the modified composites, suggesting that extrusion and subsequent milling may have broken some structures/linkages. |
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Polímeros (São Carlos. Online) |
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Crosslinking starch/oat hull mixtures for use in composites with PLAbiocompositesreactive extrusionlignocellulosic fibersinjection moldingreticulationAbstract Modification of composite components has been proposed as a tool to improve their functional properties. The present work studied crosslinking of a starch/oat hull mixture by reactive extrusion with sodium trimetaphosphate (STMP), for application in composites with polylactic acid (PLA). The treated mixture was characterized regarding degree of substitution, FT-IR, and thermal properties. The native and modified mixtures were processed by injection molding, together with PLA and glycerol. The microstructure, mechanical properties, shrinkage, density, and thermal properties of the composites were determined. The FT-IR results, increase in phosphorus content and thermal stability after starch/fiber mixture treatment with STMP suggested the occurrence of crosslinking. Better interfacial adhesion between oat hulls and the polymeric matrix was observed in electron micrographs of the composites containing the modified components. Slight decreases in tensile strength and modulus were observed in the modified composites, suggesting that extrusion and subsequent milling may have broken some structures/linkages.Associação Brasileira de Polímeros2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282019000300406Polímeros v.29 n.3 2019reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/0104-1428.02519info:eu-repo/semantics/openAccessPeixoto,Thamires da SilvaYamashita,FabioBilck,Ana PaulaCarvalho,Gizilene MariaGrossmann,Maria Victoria Eiraseng2019-10-08T00:00:00Zoai:scielo:S0104-14282019000300406Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2019-10-08T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false |
dc.title.none.fl_str_mv |
Crosslinking starch/oat hull mixtures for use in composites with PLA |
title |
Crosslinking starch/oat hull mixtures for use in composites with PLA |
spellingShingle |
Crosslinking starch/oat hull mixtures for use in composites with PLA Peixoto,Thamires da Silva biocomposites reactive extrusion lignocellulosic fibers injection molding reticulation |
title_short |
Crosslinking starch/oat hull mixtures for use in composites with PLA |
title_full |
Crosslinking starch/oat hull mixtures for use in composites with PLA |
title_fullStr |
Crosslinking starch/oat hull mixtures for use in composites with PLA |
title_full_unstemmed |
Crosslinking starch/oat hull mixtures for use in composites with PLA |
title_sort |
Crosslinking starch/oat hull mixtures for use in composites with PLA |
author |
Peixoto,Thamires da Silva |
author_facet |
Peixoto,Thamires da Silva Yamashita,Fabio Bilck,Ana Paula Carvalho,Gizilene Maria Grossmann,Maria Victoria Eiras |
author_role |
author |
author2 |
Yamashita,Fabio Bilck,Ana Paula Carvalho,Gizilene Maria Grossmann,Maria Victoria Eiras |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Peixoto,Thamires da Silva Yamashita,Fabio Bilck,Ana Paula Carvalho,Gizilene Maria Grossmann,Maria Victoria Eiras |
dc.subject.por.fl_str_mv |
biocomposites reactive extrusion lignocellulosic fibers injection molding reticulation |
topic |
biocomposites reactive extrusion lignocellulosic fibers injection molding reticulation |
description |
Abstract Modification of composite components has been proposed as a tool to improve their functional properties. The present work studied crosslinking of a starch/oat hull mixture by reactive extrusion with sodium trimetaphosphate (STMP), for application in composites with polylactic acid (PLA). The treated mixture was characterized regarding degree of substitution, FT-IR, and thermal properties. The native and modified mixtures were processed by injection molding, together with PLA and glycerol. The microstructure, mechanical properties, shrinkage, density, and thermal properties of the composites were determined. The FT-IR results, increase in phosphorus content and thermal stability after starch/fiber mixture treatment with STMP suggested the occurrence of crosslinking. Better interfacial adhesion between oat hulls and the polymeric matrix was observed in electron micrographs of the composites containing the modified components. Slight decreases in tensile strength and modulus were observed in the modified composites, suggesting that extrusion and subsequent milling may have broken some structures/linkages. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282019000300406 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282019000300406 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0104-1428.02519 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Polímeros |
publisher.none.fl_str_mv |
Associação Brasileira de Polímeros |
dc.source.none.fl_str_mv |
Polímeros v.29 n.3 2019 reponame:Polímeros (São Carlos. Online) instname:Associação Brasileira de Polímeros (ABPol) instacron:ABPO |
instname_str |
Associação Brasileira de Polímeros (ABPol) |
instacron_str |
ABPO |
institution |
ABPO |
reponame_str |
Polímeros (São Carlos. Online) |
collection |
Polímeros (São Carlos. Online) |
repository.name.fl_str_mv |
Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol) |
repository.mail.fl_str_mv |
||revista@abpol.org.br |
_version_ |
1754212590899167232 |