Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000200015 |
Resumo: | Polymer-clay nanocomposites (PCN) based on cassava starch, synthetic hectorite clay and inverted sugar cane syrup (plasticizer) were prepared by solvent-assisted (casting) process producing transparent and homogeneous films. Small amounts of clay (5-15 wt.%) resulted mainly in exfoliated nanocomposites while large amounts (30 wt.%) promote the intercalated nanocomposites formation. FT-Raman bands sensitive to hydrogen bonding in starch granules are progressively shifted to lower wavenumbers as the clay content is raised. Nanocomposites show a similar thermal behavior up to 320 ºC while the biomolecule decomposition at about 500 ºC is dependent on the clay content. CO2 release at about 300 ºC (non-oxidative decomposition of polymeric chains) decreases if compared to the gas delivery at ca. 500 ºC, as the clay content is increased. Films with clay content higher than 10 wt.% show no substantial benefit for either elongation or resistance properties. |
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Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast filmsnanocompositesclaysstarchcassavalayered silicateslaponitePolymer-clay nanocomposites (PCN) based on cassava starch, synthetic hectorite clay and inverted sugar cane syrup (plasticizer) were prepared by solvent-assisted (casting) process producing transparent and homogeneous films. Small amounts of clay (5-15 wt.%) resulted mainly in exfoliated nanocomposites while large amounts (30 wt.%) promote the intercalated nanocomposites formation. FT-Raman bands sensitive to hydrogen bonding in starch granules are progressively shifted to lower wavenumbers as the clay content is raised. Nanocomposites show a similar thermal behavior up to 320 ºC while the biomolecule decomposition at about 500 ºC is dependent on the clay content. CO2 release at about 300 ºC (non-oxidative decomposition of polymeric chains) decreases if compared to the gas delivery at ca. 500 ºC, as the clay content is increased. Films with clay content higher than 10 wt.% show no substantial benefit for either elongation or resistance properties.Sociedade Brasileira de Química2014-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000200015Journal of the Brazilian Chemical Society v.25 n.2 2014reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20130300info:eu-repo/semantics/openAccessPerotti,Gustavo F.Tronto,JairoBizeto,Marcos A.Izumi,Celly M. S.Temperini,Marcia L. A.Lugão,Ademar B.Parra,Duclerc F.Constantino,Vera R. L.eng2014-02-14T00:00:00Zoai:scielo:S0103-50532014000200015Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2014-02-14T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films |
title |
Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films |
spellingShingle |
Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films Perotti,Gustavo F. nanocomposites clays starch cassava layered silicates laponite |
title_short |
Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films |
title_full |
Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films |
title_fullStr |
Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films |
title_full_unstemmed |
Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films |
title_sort |
Biopolymer-clay nanocomposites: cassava starch and synthetic clay cast films |
author |
Perotti,Gustavo F. |
author_facet |
Perotti,Gustavo F. Tronto,Jairo Bizeto,Marcos A. Izumi,Celly M. S. Temperini,Marcia L. A. Lugão,Ademar B. Parra,Duclerc F. Constantino,Vera R. L. |
author_role |
author |
author2 |
Tronto,Jairo Bizeto,Marcos A. Izumi,Celly M. S. Temperini,Marcia L. A. Lugão,Ademar B. Parra,Duclerc F. Constantino,Vera R. L. |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Perotti,Gustavo F. Tronto,Jairo Bizeto,Marcos A. Izumi,Celly M. S. Temperini,Marcia L. A. Lugão,Ademar B. Parra,Duclerc F. Constantino,Vera R. L. |
dc.subject.por.fl_str_mv |
nanocomposites clays starch cassava layered silicates laponite |
topic |
nanocomposites clays starch cassava layered silicates laponite |
description |
Polymer-clay nanocomposites (PCN) based on cassava starch, synthetic hectorite clay and inverted sugar cane syrup (plasticizer) were prepared by solvent-assisted (casting) process producing transparent and homogeneous films. Small amounts of clay (5-15 wt.%) resulted mainly in exfoliated nanocomposites while large amounts (30 wt.%) promote the intercalated nanocomposites formation. FT-Raman bands sensitive to hydrogen bonding in starch granules are progressively shifted to lower wavenumbers as the clay content is raised. Nanocomposites show a similar thermal behavior up to 320 ºC while the biomolecule decomposition at about 500 ºC is dependent on the clay content. CO2 release at about 300 ºC (non-oxidative decomposition of polymeric chains) decreases if compared to the gas delivery at ca. 500 ºC, as the clay content is increased. Films with clay content higher than 10 wt.% show no substantial benefit for either elongation or resistance properties. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-02-01 |
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=S0103-50532014000200015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000200015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0103-5053.20130300 |
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 |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.25 n.2 2014 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318175720833024 |