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Issue 28, 2013
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Electrophoretic deposition of nanostructured-TiO2/chitosan composite coatings on stainless steel

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Abstract

Novel chitosan composite coatings containing titania nanoparticles (n-TiO2) for biomedical applications were developed by electrophoretic deposition (EPD) from ethanol–water suspensions. The optimal ethanolwater ratio was studied in order to avoid bubble formation during the EPD process and to ensure homogeneous coatings. Different n-TiO2 contents (0.5–10 g L−1) were studied for a fixed chitosan concentration (0.5 g L−1) and the properties of the electrophoretic coatings obtained were characterized. Coating composition was analyzed by thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis. Scanning electron microscopy (SEM) was employed to study both the surface and the cross section morphology of the coatings, and the thicknesses (2–6 μm) of the obtained coatings were correlated with the initial ceramic content. Contact angle measurements, as a preliminary study to predict hypothetic protein attachment on the coatings, were performed for different samples and the influence of a second chitosan layer on top of the coatings was also tested. Finally, the electrochemical behavior of the coatings, evaluated by polarization curves in DMEM at 37 °C, was studied in order to assess the corrosion resistance provided by the n-TiO2/chitosan coatings.

Graphical abstract: Electrophoretic deposition of nanostructured-TiO2/chitosan composite coatings on stainless steel

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Publication details

The article was received on 30 Jan 2013, accepted on 04 Mar 2013 and first published on 07 Mar 2013


Article type: Paper
DOI: 10.1039/C3RA40535D
Citation: RSC Adv., 2013,3, 11247-11254
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    Electrophoretic deposition of nanostructured-TiO2/chitosan composite coatings on stainless steel

    L. Cordero-Arias, S. Cabanas-Polo, H. Gao, J. Gilabert, E. Sanchez, J. A. Roether, D. W. Schubert, S. Virtanen and A. R. Boccaccini, RSC Adv., 2013, 3, 11247
    DOI: 10.1039/C3RA40535D

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