Cyclodextrin-Grafted TiO2 Nanoparticles: Synthesis, Complexation Capacity, and Dispersion in Polymeric Matrices

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Show simple item record Monreal-Pérez, Pablo Isasi, José Ramón González Benito, Francisco Javier Olmos Díaz, Dania González-Gaitano, Gustavo 2020-11-16T14:37:14Z 2020-11-16T14:37:14Z 2018-08-22
dc.identifier.bibliographicCitation Monreal-Pérez, P.; Isasi, J.R.; González-Benito, J.; Olmos, D.; González-Gaitano, G. Cyclodextrin-Grafted TiO2 Nanoparticles: Synthesis, Complexation Capacity, and Dispersion in Polymeric Matrices. Nanomaterials 2018, 8, 642
dc.identifier.issn 2079-4991
dc.description.abstract The modification of the surface of titanium dioxide nanoparticles (TiO2 NPs) by the incorporation of cyclodextrins (CDs), cyclic oligosaccharides with a hydrophobic cavity, can largely improve the functionality of TiO2 by lodging molecules of interest in the CD to act directly on the surface of the nanoparticles or for further release. With this aim, we have synthesized betaCD-modified nanoparticles (betaCDTiO2 NPs) by a two-step reaction that involves the incorporation of a spacer and then the linking of the macrocycle, and characterized them by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The capacity of the functionalized structures to trap model compounds (Rhodamine and 1-naphthol) has been compared to that of bare TiO2 NPs by fluorescence and Ultraviolet-visible (UV-visible) spectroscopy. The presence of the CDs on the surface of the TiO2 avoids the photo-degradation of the guest, which is of interest in order to combine the photocatalytic activity of TiO2, one of its most interesting features for practical purposes, with the delivery of compounds susceptible of being photo-degraded. The betaCDTiO2 NPs have been dispersed in polymeric matrices of frequently used polymers, polyethylene (LDPE) and polyethylene oxide (PEO), by cryogenic high energy ball milling to produce nanocomposites in the form of films. The surface modification of the nanoparticles favors the homogenization of the filler in the matrix, while the nanoparticles, either in bare or functionalized form, do not seem to alter the crystallization properties of the polymer at least up to a 5% (w/w) load of filler.
dc.description.sponsorship This research was funded by Ministerio de Ciencia e Innovación, project MAT2014-59116-C2-2-R.
dc.language.iso eng
dc.publisher MDPI
dc.rights © 2018 by the authors
dc.rights Atribución 3.0 España
dc.subject.other Tio2 nanoparticles
dc.subject.other Cyclodextrins
dc.subject.other Polymer nanocomposites
dc.subject.other Surface modification
dc.subject.other High Energy Ball Milling (Hebm)
dc.title Cyclodextrin-Grafted TiO2 Nanoparticles: Synthesis, Complexation Capacity, and Dispersion in Polymeric Matrices
dc.type article
dc.subject.eciencia Materiales
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. MAT2014-59116-C2-2-R
dc.type.version publishedVersion
dc.identifier.publicationissue 9 (642)
dc.identifier.publicationtitle Nanomaterials
dc.identifier.publicationvolume 8
dc.identifier.uxxi AR/0000022334
dc.contributor.funder Ministerio de Ciencia e Innovación (España)
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