Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2017 |
| Outros Autores: | , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Institucional da UNIFESP |
| Texto Completo: | http://dx.doi.org/10.1155/2017/9316761 https://repositorio.unifesp.br/handle/11600/56301 |
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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Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)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 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.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, BrazilWeb of ScienceConselho 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)CNPq: 303287/2013-6CNPq: 158961/2014-5Hindawi Ltd2020-07-31T12:46:37Z2020-07-31T12:46:37Z2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion-application/pdfhttp://dx.doi.org/10.1155/2017/9316761International Journal Of Polymer Science. London, v. , p. -, 2017.10.1155/2017/9316761WOS000401421400001.pdf1687-9422https://repositorio.unifesp.br/handle/11600/56301WOS:000401421400001engInternational Journal Of Polymer ScienceLondoninfo:eu-repo/semantics/openAccessMontagna, Larissa Stieven [UNIFESP]Montanheiro, Thais Larissa do Amaral [UNIFESP]Barros Machado, Joao PauloPassador, Fabio Roberto [UNIFESPLemes, Ana Paula [UNIFESP]Rezende, Mirabel Cerqueira [UNIFESP]reponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESP2024-08-11T10:51:06Zoai:repositorio.unifesp.br/:11600/56301Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestbiblioteca.csp@unifesp.bropendoar:34652024-08-11T10:51:06Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
| dc.title.none.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.none.fl_str_mv |
2017 2020-07-31T12:46:37Z 2020-07-31T12:46:37Z |
| 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://dx.doi.org/10.1155/2017/9316761 International Journal Of Polymer Science. London, v. , p. -, 2017. 10.1155/2017/9316761 WOS000401421400001.pdf 1687-9422 https://repositorio.unifesp.br/handle/11600/56301 WOS:000401421400001 |
| url |
http://dx.doi.org/10.1155/2017/9316761 https://repositorio.unifesp.br/handle/11600/56301 |
| identifier_str_mv |
International Journal Of Polymer Science. London, v. , p. -, 2017. 10.1155/2017/9316761 WOS000401421400001.pdf 1687-9422 WOS:000401421400001 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
International Journal Of Polymer Science |
| dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
- application/pdf |
| dc.coverage.none.fl_str_mv |
London |
| dc.publisher.none.fl_str_mv |
Hindawi Ltd |
| publisher.none.fl_str_mv |
Hindawi Ltd |
| dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UNIFESP instname:Universidade Federal de São Paulo (UNIFESP) instacron:UNIFESP |
| instname_str |
Universidade Federal de São Paulo (UNIFESP) |
| instacron_str |
UNIFESP |
| institution |
UNIFESP |
| reponame_str |
Repositório Institucional da UNIFESP |
| collection |
Repositório Institucional da UNIFESP |
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Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP) |
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biblioteca.csp@unifesp.br |
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