8633

8014

كارشناسي ارشد

شناسايي و انتخاب مواد

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد

1392

دوازده،84ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

محمدحسين فتحي، حميدرضا سليمي جزي

وجيهه مرتضوي

21/12/92

محمدعلي گلعذار، فتح اله كريم زاده

مهندسي مواد

ID8014

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Fabrication and characterization of diopside mangnesium fluorapatite nanocomposite foam for biomedical application Narges Nasehi Gogajeh nasehi es me@yahoo com Jan 20th 2014 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisors Dr Mohammad Hossain Fathi Fathi@cc iut ac irDr Hamidreza Salamijazi hrjazi@cc iut ac irAbstractPorous hydroxyapatite a bioceramic with high biological affinity and similar composition to thebone mineral has attracted a lot of interest To produce a biomaterials with compositions close tobone mineral different ions have been substituted in hydroxyapatite structure Fluor andmagnesium substitution in hydroxyapatite structure have been investigated to improve itsbiological and physical properties It is expected that addition of diopside a glass ceamic with highmechanical strentgh and bioactivity to magnesium fluorapatite lead to higher mechanical andbiological properties In this study magnesium fluorapatite foams with 10 20 and 30 weightpercent diopside were fabricated via gelcasting method The porosity and mechanical properties ofthe foams were measured by Archimedes method and compressive tests respectivly X raydiffraction XRD scanning electron microscopy SEM energy dispersive spectroscopy EDS and transmission electron microscopy TEM were used to evaluate and characterize phasestructure and composition crystallite size and pore size and morphology To evaluate thebioactivity and bioresorbability of the foams soaking test in Ringer s solution was performed SEM and Fourier Transform Infrared Spectroscopy FTIR were used for verification andcharactrization of apatite formation Ion release was determined by inductive coupled plasmaoptical emission spectroscopy ICP OES Results showed that nanostructured magnesium fluorapatite diopside foams with 50 70 porosity were fabricated perfectly Apatite layerformation was confirmed on all foams magnesium fluorapatite foam with 10 wt diopsideexhibited maximum strength 6 MPa and magnesium fluorapatite foam with 30 wt diopsideshowed maximum bioactivity In conclusion magnesium fluorapatite diopside foams exhibiteedbioactive behavior with acceptable mechanical properties and could be good candidates for bonetissue engineering applications Keywords magnesium fluorapatite Gelcasting diopside nanocomposite foam sol gel magnesium fluorapatite diopside nanocomposite

محمدحسين فتحي، حميدرضا سليمي جزي

وجيهه مرتضوي

محمدعلي گلعذار، فتح اله كريم زاده