Electrophoretic deposition and characterization of chitosan/silica/bioactive glass composite coatings on magnesium WE43 alloy

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dc.contributor.advisor Ballarre, Josefina
dc.contributor.author Gagliardo, Joan Franco
dc.date.accessioned 2019-05-30T17:54:33Z
dc.date.available 2019-05-30T17:54:33Z
dc.date.issued 2017-05-25
dc.identifier.uri http://rinfi.fi.mdp.edu.ar/xmlui/handle/123456789/306
dc.description.abstract Magnesium (Mg) and its alloys have been extensively explored as potential biodegradable implant materials for orthopedic and dental applications. However, the rapid degradation corrosion of Mg based alloys in physiological conditions has delayed their introduction for therapeutic applications. Electrophoretic deposition (EPD) of chitosan/silica/ bioactive glass (45S5 composition) composite coating on magnesium alloy (WE43) substrates was investigated. The present project has the aim to reduce and control the substrate corrosion rate and augment the initial bioactivity. The surface morphology, hydrophilic character, adhesion and surface topography of the coated sample were investigated by means of optical microscopy, SEM images, contact angle, roughness and tape test. The in vitro test consisted on immersion of the coated samples in Simulated Body Fluid (SBF) at 37°C during 2h, 1, 2, 3 and 7 days with following characterization through optical microscopy, SEM, Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy and X-Ray Diffraction (XRD) in order to identify hydroxycarbonate apatite (HCA) formation on the surface. HCA indicates the degree of bioactivity of the sample, because it leads to strong bond between the biomaterial and the living tissue. Characterization of the corrosion behavior was achieved by electrochemical impedance spectroscopy (EIS) and by potentiodynamic polarization in 0.1 M NaCl at ambient temperature. Surface analysis of the coated sample showed to be beneficial for bone regeneration. HCA formation was confirmed after 7 days of immersion in SBF, providing a bioactive behavior to the Mg WE43 alloy. Regarding the degradation behavior, results showed that the coating did not provided improvements on protection against corrosion at least during the 30 minutes that the samples were immersed in 0.1M NaCl at ambient temperature. es_AR
dc.format application/pdf es_AR
dc.language.iso spa es_AR
dc.publisher Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Argentina es_AR
dc.rights info:eu-repo/semantics/openAccess es_AR
dc.subject Aplicaciones biomédicas es_AR
dc.subject Implantes es_AR
dc.subject Deposición electroforética (EPD) es_AR
dc.subject Quitosán / sílice / vidrio bioactivo (composición 45S5) es_AR
dc.subject Sustratos de aleación de magnesio (WE43) es_AR
dc.subject Aleaciones es_AR
dc.title Electrophoretic deposition and characterization of chitosan/silica/bioactive glass composite coatings on magnesium WE43 alloy es_AR
dc.type Thesis es_AR
dc.rights.holder https://creativecommons.org/licenses/by/4.0/ es_AR
dc.type.oa info:eu-repo/semantics/bachelorThesis es_AR
dc.type.snrd info:ar-repo/semantics/tesis de grado es_AR
dc.type.info info:eu-repo/semantics/draft es_AR
dc.description.fil Fil: Gagliardo, Joan Franco. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina es_AR


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