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Polymers 2016, 8(3), 68; doi:10.3390/polym8030068

Structural and Spectroscopic Characterization of A Nanosized Sulfated TiO2 Filler and of Nanocomposite Nafion Membranes

1
Department of Computer Science, University of Verona, Strada le Grazie 15, 37134 Verona, Italy
2
Department of Sciences, University of Basilicata, V.le dell’Ateneo Lucano 10, 85100 Potenza, Italy
3
Department of Chemistry, Sapienza University of Rome. P.le Aldo Moro 5, 00185 Rome, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Frank Wiesbrock
Received: 29 January 2016 / Revised: 19 February 2016 / Accepted: 23 February 2016 / Published: 1 March 2016
(This article belongs to the Special Issue Nano- and Microcomposites for Electrical Engineering Applications)
View Full-Text   |   Download PDF [3017 KB, uploaded 1 March 2016]   |  

Abstract

A large number of nano-sized oxides have been studied in the literature as fillers for polymeric membranes, such as Nafion®. Superacidic sulfated oxides have been proposed and characterized. Once incorporated into polymer matrices, their beneficial effect on peculiar membrane properties has been demonstrated. The alteration of physical-chemical properties of composite membranes has roots in the intermolecular interaction between the inorganic filler surface groups and the polymer chains. In the attempt to tackle this fundamental issue, here we discuss, by a multi-technique approach, the properties of a nanosized sulfated titania material as a candidate filler for Nafion membranes. The results of a systematic study carried out by synchrotron X-ray diffraction, transmission electron microscopy, thermogravimetry, Raman and infrared spectroscopies are presented and discussed to get novel insights about the structural features, molecular properties, and morphological characteristics of sulphated TiO2 nanopowders and composite Nafion membranes containing different amount of sulfated TiO2 nanoparticles (2%, 5%, 7% w/w). View Full-Text
Keywords: fuel cells; nafion nano-composite membranes; sulfated titanium dioxide; structural (XRD); thermal (TGA) and morphological (TEM) characterization; vibrational spectroscopy; FT-IR absorption and ATR spectroscopy; micro-Raman spectroscopy fuel cells; nafion nano-composite membranes; sulfated titanium dioxide; structural (XRD); thermal (TGA) and morphological (TEM) characterization; vibrational spectroscopy; FT-IR absorption and ATR spectroscopy; micro-Raman spectroscopy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Allodi, V.; Brutti, S.; Giarola, M.; Sgambetterra, M.; Navarra, M.A.; Panero, S.; Mariotto, G. Structural and Spectroscopic Characterization of A Nanosized Sulfated TiO2 Filler and of Nanocomposite Nafion Membranes. Polymers 2016, 8, 68.

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