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dc.contributor.authorFrança, Juliene Oliveira Campos de-
dc.contributor.authorLima, Quezia dos Santos-
dc.contributor.authorBarbosa, Mariana Martins de Melo-
dc.contributor.authorFonseca, Ana Lívia Fernandes-
dc.contributor.authorMachado, Guilherme de França-
dc.contributor.authorDias, Sílvia Cláudia Loureiro-
dc.contributor.authorDias, José Alves-
dc.date.accessioned2025-09-25T15:30:06Z-
dc.date.available2025-09-25T15:30:06Z-
dc.date.issued2023-12-11-
dc.identifier.citationFRANÇA, Juliene Oliveira Campos de et al. Sonochemical synthesis of magnetite/poly(lactic acid) nanocomposites. Polymers, Basel, v. 15, n. 24, e4662, 2023. DOI: https://doi.org/10.3390/polym15244662. Disponível em: http://mdpi.com/2073-4360/15/24/4662. Acesso em: 16 jul. 2025.pt_BR
dc.identifier.urihttp://repositorio.unb.br/handle/10482/52517-
dc.language.isoengpt_BR
dc.publisherMDPIpt_BR
dc.rightsAcesso Abertopt_BR
dc.titleSonochemical synthesis of magnetite/poly(lactic acid) nanocompositespt_BR
dc.typeArtigopt_BR
dc.subject.keywordÁcido láticopt_BR
dc.subject.keywordNanopartículas magnéticaspt_BR
dc.subject.keywordNanocompósitospt_BR
dc.subject.keywordMagnetitapt_BR
dc.subject.keywordPolimerizaçãopt_BR
dc.rights.licenseThis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).pt_BR
dc.identifier.doihttps://doi.org/10.3390/polym15244662pt_BR
dc.description.abstract1Nanocomposites based on poly(lactic acid) (PLA) and magnetite nanoparticles (MNP-Fe3O4) show promise for applications in biomedical treatments. One key challenge is to improve the stabilization and dispersion of MNP-Fe3O4. To address this, we synthesized MNP-Fe3O4/PLA nanocomposites using ultrasound mediation and a single iron(II) precursor, eliminating the need for surfactants or organic solvents, and conducted the process under ambient conditions. The resulting materials, containing 18 and 33 wt.% Fe3O4, exhibited unique thermal behavior characterized by two mass losses: one at a lower degradation temperature (Td) and another at a higher Td compared to pure PLA. This suggests that the interaction between PLA and MNP-Fe3O4 occurs through hydrogen bonds, enhancing the thermal stability of a portion of the polymer. Fourier Transform Infrared (FT-IR) analysis supported this finding, revealing shifts in bands related to the terminal –OH groups of the polymer and the Fe–O bonds, thereby confirming the interaction between the groups. Raman spectroscopy demonstrated that the PLA serves as a protective layer against the oxidation of MNP-Fe3O4 in the 18% MNP-Fe3O4/PLA nanocomposite when exposed to a high-power laser (90 mW). Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) analyses confirmed that the synthetic procedure yields materials with dispersed nanoparticles within the PLA matrix without the need for additional reactants.pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9145-2752pt_BR
dc.identifier.orcidhttps://orcid.org/0009-0009-1598-478Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-3351-9226pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0042-0091pt_BR
dc.contributor.affiliationUniversity of Brasília, Chemistry Institute, Laboratory of Catalysispt_BR
dc.contributor.affiliationUniversity of Brasília, Chemistry Institute, Laboratory of Catalysispt_BR
dc.contributor.affiliationUniversity of Brasília, Chemistry Institute, Laboratory of Catalysispt_BR
dc.contributor.affiliationUniversity of Brasília, Chemistry Institute, Laboratory of Catalysispt_BR
dc.contributor.affiliationUniversity of Brasília, Chemistry Institute, Laboratory of Catalysispt_BR
dc.contributor.affiliationUniversity of Brasília, Chemistry Institute, Laboratory of Catalysispt_BR
dc.contributor.affiliationUniversity of Brasília, Chemistry Institute, Laboratory of Catalysispt_BR
dc.description.unidadeInstituto de Química (IQ)pt_BR
dc.description.ppgPrograma de Pós-Graduação em Químicapt_BR
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