Impregnation of pet films and PHB granules with curcumin in supercritical CO2

Detalhes bibliográficos
Autor(a) principal: Herek,L. C. S.
Data de Publicação: 2006
Outros Autores: Oliveira,R. C., Rubira,A. F., Pinheiro,N.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Chemical Engineering
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322006000200010
Resumo: The process of dyeing poly(ethylene terephthalate) - PET films at 50, 60 and 65ºC and poly(hydroxybutyrate) - PHB granules at 60, 70 and 80ºC using supercritical carbon dioxide (scCO2) as solvent and ethanol as cosolvent was studied by DSC, TGA analysis and measurements of shrinkage to determine the morphological modifications caused by the scCO2 treatment of these materials. A comparison of the effects of annealing both polymers in scCO2 provided evidence that PHB had plasticization activity due to its crystallinity and that PET favored the dyeing process at high pressure when its temperature was raised to close to the Tg value. DSC and TGA measurements were obtained for all the samples. The DSC results showed that there was no significant structural change and the TGA data showed that thermal stability was not affected in the samples analyzed.
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spelling Impregnation of pet films and PHB granules with curcumin in supercritical CO2Supercritical CO2PET filmsThe process of dyeing poly(ethylene terephthalate) - PET films at 50, 60 and 65ºC and poly(hydroxybutyrate) - PHB granules at 60, 70 and 80ºC using supercritical carbon dioxide (scCO2) as solvent and ethanol as cosolvent was studied by DSC, TGA analysis and measurements of shrinkage to determine the morphological modifications caused by the scCO2 treatment of these materials. A comparison of the effects of annealing both polymers in scCO2 provided evidence that PHB had plasticization activity due to its crystallinity and that PET favored the dyeing process at high pressure when its temperature was raised to close to the Tg value. DSC and TGA measurements were obtained for all the samples. The DSC results showed that there was no significant structural change and the TGA data showed that thermal stability was not affected in the samples analyzed.Brazilian Society of Chemical Engineering2006-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322006000200010Brazilian Journal of Chemical Engineering v.23 n.2 2006reponame:Brazilian Journal of Chemical Engineeringinstname:Associação Brasileira de Engenharia Química (ABEQ)instacron:ABEQ10.1590/S0104-66322006000200010info:eu-repo/semantics/openAccessHerek,L. C. S.Oliveira,R. C.Rubira,A. F.Pinheiro,N.eng2006-07-05T00:00:00Zoai:scielo:S0104-66322006000200010Revistahttps://www.scielo.br/j/bjce/https://old.scielo.br/oai/scielo-oai.phprgiudici@usp.br||rgiudici@usp.br1678-43830104-6632opendoar:2006-07-05T00:00Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)false
dc.title.none.fl_str_mv Impregnation of pet films and PHB granules with curcumin in supercritical CO2
title Impregnation of pet films and PHB granules with curcumin in supercritical CO2
spellingShingle Impregnation of pet films and PHB granules with curcumin in supercritical CO2
Herek,L. C. S.
Supercritical CO2
PET films
title_short Impregnation of pet films and PHB granules with curcumin in supercritical CO2
title_full Impregnation of pet films and PHB granules with curcumin in supercritical CO2
title_fullStr Impregnation of pet films and PHB granules with curcumin in supercritical CO2
title_full_unstemmed Impregnation of pet films and PHB granules with curcumin in supercritical CO2
title_sort Impregnation of pet films and PHB granules with curcumin in supercritical CO2
author Herek,L. C. S.
author_facet Herek,L. C. S.
Oliveira,R. C.
Rubira,A. F.
Pinheiro,N.
author_role author
author2 Oliveira,R. C.
Rubira,A. F.
Pinheiro,N.
author2_role author
author
author
dc.contributor.author.fl_str_mv Herek,L. C. S.
Oliveira,R. C.
Rubira,A. F.
Pinheiro,N.
dc.subject.por.fl_str_mv Supercritical CO2
PET films
topic Supercritical CO2
PET films
description The process of dyeing poly(ethylene terephthalate) - PET films at 50, 60 and 65ºC and poly(hydroxybutyrate) - PHB granules at 60, 70 and 80ºC using supercritical carbon dioxide (scCO2) as solvent and ethanol as cosolvent was studied by DSC, TGA analysis and measurements of shrinkage to determine the morphological modifications caused by the scCO2 treatment of these materials. A comparison of the effects of annealing both polymers in scCO2 provided evidence that PHB had plasticization activity due to its crystallinity and that PET favored the dyeing process at high pressure when its temperature was raised to close to the Tg value. DSC and TGA measurements were obtained for all the samples. The DSC results showed that there was no significant structural change and the TGA data showed that thermal stability was not affected in the samples analyzed.
publishDate 2006
dc.date.none.fl_str_mv 2006-06-01
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=S0104-66322006000200010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322006000200010
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0104-66322006000200010
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 Brazilian Society of Chemical Engineering
publisher.none.fl_str_mv Brazilian Society of Chemical Engineering
dc.source.none.fl_str_mv Brazilian Journal of Chemical Engineering v.23 n.2 2006
reponame:Brazilian Journal of Chemical Engineering
instname:Associação Brasileira de Engenharia Química (ABEQ)
instacron:ABEQ
instname_str Associação Brasileira de Engenharia Química (ABEQ)
instacron_str ABEQ
institution ABEQ
reponame_str Brazilian Journal of Chemical Engineering
collection Brazilian Journal of Chemical Engineering
repository.name.fl_str_mv Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)
repository.mail.fl_str_mv rgiudici@usp.br||rgiudici@usp.br
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