AVS 62nd International Symposium & Exhibition
    Biomaterial Interfaces Tuesday Sessions
       Session BI-TuP

Paper BI-TuP7
Preparation of Bioglass-ZrO2 Functionalized Coatings by EPD

Tuesday, October 20, 2015, 6:30 pm, Room Hall 3

Session: Biomaterial Interfaces Poster Session
Presenter: Ana Arizmendi-Morquecho, Centro de Investigación en Materiales Avanzados, Mexico
Authors: A.A. Arizmendi-Morquecho, Centro de Investigación en Materiales Avanzados, Mexico
M.A. Aguilera-Bustos, Centro de Investigación en Materiales Avanzados, Mexico
A.C. Chávez-Valdez, Consultant
M.S.D. Sánchez-Domínguez, Centro de Investigación en Materiales Avanzados, Mexico
M.S.V. Sánchez-Vázquez, Centro de Investigación en Materiales Avanzados, Mexico
Correspondent: Click to Email
Surface functionalization is an important tool for many technical and biomedical applications. The modification of a nanoparticle surface can alter its adhesion characteristics, improve the dispersion in matrices or enhance catalytic properties. In this work, strategies for surface functionalization of inorganic materials with a special focus on zirconia (ZrO2) synthetized nanoparticles as reinforcement for bioglass ceramic matrix are discussed. The density of functionalization in nanoparticles using different organosilanes molecules was measured by Si–O and hydroxyl (–OH) bonds. The reactivity between organosilanes and the surface of nanoparticles was measured by electrostatic potential using molecular simulations with Gaussian software. This simulation showed the regions from silane molecules with the lowest electrostatic potential representing the sites were the metallic oxides are attached. The morphology of nanoparticles and functionalization layer was characterized using TEM-EDS, FTIR and TGA. Due to the low stability of bioglass in organic suspensions, the modification of its surface was necessary using functionalized nanoparticles which allowed the preparation of Bioglass-ZrO2 reinforced composites. Suspensions were prepared using ethanol as dispersing media. Bioglass suspensions showed poor stability, while suspensions with Bioglass and functionalized nanoparticles showed improved stability. The formation of bonds between bioglass particles and functionalized ZrO2 nanoparticles allowed the dispersion of the material which is necessary for the preparation of coatings by Electrophoretic Deposition (EPD). The Bioglass and Bioglass-ZrO2 coatings were characterized by SEM-EDS and XRD. A uniform coating was obtained with well dispersed ZrO2 nanoparticles. These coatings using functionalized ZrO2 as reinforcement can improve the mechanical properties as well as the biocompatibility of the composite.