Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)

Detalhes bibliográficos
Autor(a) principal: Montagna, Larissa Stieven [UNIFESP]
Data de Publicação: 2017
Outros Autores: Montanheiro, Thais Larissa do Amaral [UNIFESP], Barros Machado, Joao Paulo, Passador, Fabio Roberto [UNIFESP, Lemes, Ana Paula [UNIFESP], Rezende, Mirabel Cerqueira [UNIFESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNIFESP
Texto Completo: https://repositorio.unifesp.br/handle/11600/56301
http://dx.doi.org/10.1155/2017/9316761
Resumo: The influence of different contents, 0.25, 0.50, and 1.00 wt%, of graphite nanosheets (GNS) on the properties of poly(3-hydroxybutyrate- co-3-hydroxyvalerate) (PHBV) nanocomposites obtained by solution casting method has been studied. GNS were prepared by three steps: intercalation (chemical exfoliation), expansion (thermal treatment), and the GNS obtainment (physical treatment by ultrasonic exfoliation). X-ray diffraction (XRD), Raman spectroscopy, and field emission gun-scanning electron microscopy (FE-SEM) showed that the physical, chemical, and thermal treatments preserved the graphite sheets structure. XRD and Raman results also showed that GNS were dispersed in the PHBV matrix. The degree of crystallinity (Xc) of the nanocomposites did not change when the graphite nanosheets were added. However, the GNS acted as nucleation agent for crystallization
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spelling Montagna, Larissa Stieven [UNIFESP]Montanheiro, Thais Larissa do Amaral [UNIFESP]Barros Machado, Joao PauloPassador, Fabio Roberto [UNIFESPLemes, Ana Paula [UNIFESP]Rezende, Mirabel Cerqueira [UNIFESP]2020-07-31T12:46:37Z2020-07-31T12:46:37Z2017International Journal Of Polymer Science. London, v. , p. -, 2017.1687-9422https://repositorio.unifesp.br/handle/11600/56301http://dx.doi.org/10.1155/2017/9316761WOS000401421400001.pdf10.1155/2017/9316761WOS:000401421400001The influence of different contents, 0.25, 0.50, and 1.00 wt%, of graphite nanosheets (GNS) on the properties of poly(3-hydroxybutyrate- co-3-hydroxyvalerate) (PHBV) nanocomposites obtained by solution casting method has been studied. GNS were prepared by three steps: intercalation (chemical exfoliation), expansion (thermal treatment), and the GNS obtainment (physical treatment by ultrasonic exfoliation). X-ray diffraction (XRD), Raman spectroscopy, and field emission gun-scanning electron microscopy (FE-SEM) showed that the physical, chemical, and thermal treatments preserved the graphite sheets structure. XRD and Raman results also showed that GNS were dispersed in the PHBV matrix. The degree of crystallinity (Xc) of the nanocomposites did not change when the graphite nanosheets were added. However, the GNS acted as nucleation agent for crystallizationthat is, in the second heating the samples containing GNS showed two melting peaks. The addition the GNS did not change the thermal stability of the PHBV.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fed Univ Sao Paulo UNIFESP, Grp Polymers & Macromol, Inst Sci & Technol, Sao Jose Dos Campos, SP, BrazilNatl Inst Space Res INPE, Associated Lab Sensors & Mat LAS, Sao Jose Dos Campos, SP, BrazilInstitute of Science and Technology, Universidade Federal de São Paulo (UNIFESP), Group of Polymers and Macromolecules, São José dos Campos, SP, BrazilCNPq: 303287/2013-6CNPq: 158961/2014-5Web of Science-engHindawi LtdInternational Journal Of Polymer ScienceEffect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleLondoninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALWOS000401421400001.pdfapplication/pdf3115316${dspace.ui.url}/bitstream/11600/56301/1/WOS000401421400001.pdf2d42ae726681756a9b4390b330445bd3MD51open accessTEXTWOS000401421400001.pdf.txtWOS000401421400001.pdf.txtExtracted texttext/plain38076${dspace.ui.url}/bitstream/11600/56301/8/WOS000401421400001.pdf.txt223afa82d55936f8699848ad813db8e1MD58open accessTHUMBNAILWOS000401421400001.pdf.jpgWOS000401421400001.pdf.jpgIM Thumbnailimage/jpeg6395${dspace.ui.url}/bitstream/11600/56301/10/WOS000401421400001.pdf.jpga659e5a8239c3109f9eb71f8bf5f5f84MD510open access11600/563012023-06-05 19:09:38.376open accessoai:repositorio.unifesp.br:11600/56301Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-06-05T22:09:38Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false
dc.title.en.fl_str_mv Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
title Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
spellingShingle Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
Montagna, Larissa Stieven [UNIFESP]
title_short Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
title_full Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
title_fullStr Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
title_full_unstemmed Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
title_sort Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
author Montagna, Larissa Stieven [UNIFESP]
author_facet Montagna, Larissa Stieven [UNIFESP]
Montanheiro, Thais Larissa do Amaral [UNIFESP]
Barros Machado, Joao Paulo
Passador, Fabio Roberto [UNIFESP
Lemes, Ana Paula [UNIFESP]
Rezende, Mirabel Cerqueira [UNIFESP]
author_role author
author2 Montanheiro, Thais Larissa do Amaral [UNIFESP]
Barros Machado, Joao Paulo
Passador, Fabio Roberto [UNIFESP
Lemes, Ana Paula [UNIFESP]
Rezende, Mirabel Cerqueira [UNIFESP]
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Montagna, Larissa Stieven [UNIFESP]
Montanheiro, Thais Larissa do Amaral [UNIFESP]
Barros Machado, Joao Paulo
Passador, Fabio Roberto [UNIFESP
Lemes, Ana Paula [UNIFESP]
Rezende, Mirabel Cerqueira [UNIFESP]
description The influence of different contents, 0.25, 0.50, and 1.00 wt%, of graphite nanosheets (GNS) on the properties of poly(3-hydroxybutyrate- co-3-hydroxyvalerate) (PHBV) nanocomposites obtained by solution casting method has been studied. GNS were prepared by three steps: intercalation (chemical exfoliation), expansion (thermal treatment), and the GNS obtainment (physical treatment by ultrasonic exfoliation). X-ray diffraction (XRD), Raman spectroscopy, and field emission gun-scanning electron microscopy (FE-SEM) showed that the physical, chemical, and thermal treatments preserved the graphite sheets structure. XRD and Raman results also showed that GNS were dispersed in the PHBV matrix. The degree of crystallinity (Xc) of the nanocomposites did not change when the graphite nanosheets were added. However, the GNS acted as nucleation agent for crystallization
publishDate 2017
dc.date.issued.fl_str_mv 2017
dc.date.accessioned.fl_str_mv 2020-07-31T12:46:37Z
dc.date.available.fl_str_mv 2020-07-31T12:46:37Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.citation.fl_str_mv International Journal Of Polymer Science. London, v. , p. -, 2017.
dc.identifier.uri.fl_str_mv https://repositorio.unifesp.br/handle/11600/56301
http://dx.doi.org/10.1155/2017/9316761
dc.identifier.issn.none.fl_str_mv 1687-9422
dc.identifier.file.none.fl_str_mv WOS000401421400001.pdf
dc.identifier.doi.none.fl_str_mv 10.1155/2017/9316761
dc.identifier.wos.none.fl_str_mv WOS:000401421400001
identifier_str_mv International Journal Of Polymer Science. London, v. , p. -, 2017.
1687-9422
WOS000401421400001.pdf
10.1155/2017/9316761
WOS:000401421400001
url https://repositorio.unifesp.br/handle/11600/56301
http://dx.doi.org/10.1155/2017/9316761
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