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Título

Biodegradable polycaprolactone-titania nanocomposites: Preparation, characterization and antimicrobial properties

AutorMuñoz-Bonilla, Alexandra CSIC ORCID; Cerrada, María L. CSIC ORCID; Fernández-García, Marta CSIC ORCID ; Kubacka, Anna CSIC ORCID; Ferrer, Manuel CSIC ORCID; Fernández, M.
Palabras claveThermal properties
Nanocomposites
Polycaprolactone
Titania
Antimicrobial
Fecha de publicación2013
EditorMultidisciplinary Digital Publishing Institute
CitaciónInternational Journal of Molecular Sciences 14: 9249- 9266 (2013)
ResumenNanocomposites obtained from the incorporation of synthesized TiO2 nanoparticles (≈10 nm average primary particle size) in different amounts, ranging from 0.5 to 5 wt.%, into a biodegradable polycaprolactone matrix are achieved via a straightforward and commercial melting processing. The resulting nanocomposites have been structurally and thermally characterized by transmission electron microscopy (TEM), wide/small angle X-ray diffraction (WAXS/SAXS, respectively) and differential scanning calorimetry (DSC). TEM evaluation provides evidence of an excellent nanometric dispersion of the oxide component in the polymeric matrix, with aggregates having an average size well below 100 nm. Presence of these TiO2 nanoparticles induces a nucleant effect during polymer crystallization. Moreover, the antimicrobial activity of nanocomposites has been tested using both UV and visible light against Gram-negative Escherichia coli bacteria and Gram-positive Staphylococcus aureus. The bactericidal behavior has been explained through the analysis of the material optical properties, with a key role played by the creation of new electronic states within the polymer-based nanocomposites.
URIhttp://hdl.handle.net/10261/103394
DOI10.3390/ijms14059249
Identificadoresdoi: 10.3390/ijms14059249
issn: 1661-6596
e-issn: 1422-0067
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