Physical-chemical properties of nanocomposites based on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and titanium dioxide nanoparticles

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dc.citation.issue1
dc.citation.volume5
dc.contributor.authorBraga, Natalia F. [UNIFESP]
dc.contributor.authorda Silva, Ana Paula [UNIFESP]
dc.contributor.authorArantes, Tatiane Moraes
dc.contributor.authorLemes, Ana Paula [UNIFESP]
dc.contributor.authorCristovan, Fernando Henrique [UNIFESP]
dc.coverageBristol
dc.date.accessioned2020-07-02T18:52:12Z
dc.date.available2020-07-02T18:52:12Z
dc.date.issued2018
dc.description.abstractPoly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was reinforced with titanium dioxide (TiO2) in concentrations of 1.0%, 2.5% and 5.0% (m/m) to produce nanocomposites by the solvent casting technique. TiO2 was synthesized by a hydrothermal treatment to produce nanoparticles. The nanostructure of the nanoparticles was studied by x-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The XRD confirmed TiO2 crystalline nanoparticles, with a mixture of anatase and rutile phases. Through TEM analysis, the formation of TiO2 nanorod agglomerates with an average diameter and length of 40 and 12 nm, respectively, was observed. The thermal and mechanical properties of the pure PHBV and nanocomposite films were characterized by differential scanning calorimetry (DSC) and dynamic mechanical analysis. The DSC analysis showed that the glass transition temperature decreased with the inclusion of TiO2 in the PHBV matrix in relation to pure PHBV. The results of biodegradation assays for the PHBV and nanocomposites in an aqueous medium and in soil showed morphological and structural changes for all samples, indicating a high biodegradation rate for this material. The most important conclusion is that the biodegradation of the PHBV was not affected by the addition of nanoparticles, thus enabling the use of nanocomposites in applications requiring biodegradable materials.en
dc.description.affiliationFed Univ Sao Paulo Unifesp, Dept Sci & Technol, BR-12231280 Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationFed Univ Goias UFG, Dept Chem, BR-75801615 Jatai, Go, Brazil
dc.description.affiliationUnifespFed Univ Sao Paulo Unifesp, Dept Sci & Technol, BR-12231280 Sao Jose Dos Campos, SP, Brazil
dc.description.provenanceMade available in DSpace on 2020-07-02T18:52:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2018. Added 1 bitstream(s) on 2020-07-02T20:12:56Z : No. of bitstreams: 1 WOS000419326100003.pdf: 2350968 bytes, checksum: 425b3fcf12812e6d2795c701b57e2334 (MD5)en
dc.description.sourceWeb of Science
dc.description.sponsorshipCNPq
dc.description.sponsorshipFAPESP [2013/14954-6]
dc.description.sponsorshipIDFAPESP [2013/14954-6]
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.1088/2053-1591/aa9f7a
dc.identifier.citationMaterials Research Express. Bristol, v. 5, n. 1, p. -, 2018.
dc.identifier.doi10.1088/2053-1591/aa9f7a
dc.identifier.fileWOS000419326100003.pdf
dc.identifier.issn2053-1591
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/53947
dc.identifier.wosWOS:000419326100003
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofMaterials Research Express
dc.rightsAcesso aberto
dc.subjectPHBVen
dc.subjecttitanium dioxideen
dc.subjectnanoparticlesen
dc.subjectnanocompositesen
dc.subjectphysical-chemical propertiesen
dc.subjectbiodegradationen
dc.titlePhysical-chemical properties of nanocomposites based on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and titanium dioxide nanoparticlesen
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