Structural and optical features of ureasiloxane-polyethylene oxide hybrids containing CeO2 nanoparticles

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.creatorTruffault, L.-
Autor(es): dc.creatorMagnani, M.-
Autor(es): dc.creatorHammer, P.-
Autor(es): dc.creatorSantilli, C. V.-
Autor(es): dc.creatorPulcinelli, S. H.-
Data de aceite: dc.date.accessioned2025-08-21T18:21:48Z-
Data de disponibilização: dc.date.available2025-08-21T18:21:48Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2015-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.colsurfa.2015.02.028-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/231346-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/231346-
Descrição: dc.descriptionUreasiloxane-polyethylene oxide 1900 hybrids loaded with CeO2 nanoparticles were prepared by the sol-gel method, and the effects of CeO2 incorporation on the structural and optical features of the hybrids were studied. The formation of a colloidal suspension of CeO2 nanoparticles, prepared by the sol-gel process, was monitored in situ by UV-vis spectroscopy. After separation from the colloidal suspension, the ceria powders were analyzed by transmission electron microscopy and X-ray diffraction, confirming the presence of nanoparticles about 3nm in size, containing the fluorite phase. Three different ceria concentrations were then incorporated into the ureasiloxane-polyethylene oxide hybrid. The nanostructural properties of the loaded hybrids, studied by small angle X-ray scattering, showed that the mean distance between two siloxane nodes was slightly increased by the incorporation of Ce. X-ray photoelectron spectroscopy analysis revealed the presence of both Ce(IV) and Ce(III) in the loaded hybrids. The presence of Ce significantly increased the UVA/B absorption capacity of the ureasiloxane-polyethylene oxide 1900 matrix, while maintaining its transparency in the visible region. The production of transparent UVA/B absorbing matrices loaded with CeO2-based nanoparticles extends the potential applications of U-PEO hybrids in the biomedical and optical devices fields.-
Descrição: dc.descriptionInstitute of Chemistry Physico-Chemistry Department University of São Paulo State, Rua Prof. Francisco Degni no 55, PO Box 335 Quitandinha-
Formato: dc.format73-80-
Idioma: dc.languageen-
Relação: dc.relationColloids and Surfaces A: Physicochemical and Engineering Aspects-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCeria nanoparticles-
Palavras-chave: dc.subjectOrganic-inorganic hybrids-
Palavras-chave: dc.subjectPhotoprotection-
Palavras-chave: dc.subjectSol-gel-
Título: dc.titleStructural and optical features of ureasiloxane-polyethylene oxide hybrids containing CeO2 nanoparticles-
Tipo de arquivo: dc.typelivro digital-
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