پديد آورنده :
مزروعي سبداني، مريم
عنوان :
تهيه پودر در نانومتري و پوشش كامپوزيتي هيدروكسي -آپاتيت-فورستريت- شيشه زيست فعال و ارزيابي خواص آن ها
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
دوازده،105ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمد حسين فتحي
استاد مشاور :
علي صمدي كوچك داني
توصيفگر ها :
نانو پودر كامپوزيتي , خواص مكانيكي , داربست , ليچينگ ذره اي , ريخته گري حلال
تاريخ نمايه سازي :
25/7/89
استاد داور :
فتح الله كريم زاده، محمدرضا سائري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Fabrication of characterization of Hydroxyapatite Forsterite Bioglass Nanopowder and Nanostructured Coating and Characterization of their properties Maryam Mazrooei Sebdani m mazrooei@ma iut ac ir April 6 2010 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Dr Mohammad Hossein Fathi Prof Supervisor E mail fathi@cc iut ac ir Abstract Despite considerable bioactivity of bioceramics such as hydroxyapatite and bioglasses their applications were restricted duo to their poor mechanical properties This problem could be solved via making composite with other ceramics such as forsterite In this research hydroxyapatite forsterite bioglass nanopowder and nanostructured composite coating were prepared via a sol gel process and characterized Also hydroxyapatite forsterite bioglass nanopowder was used as a reinforcement in a composite scaffold Then scaffolds including PLA polymer as a matrix and composite nanopowder as a reinforcement was prepared via a particulate leaching solvent casting The effect of added reinforcement was investigated To prepare composite nanopowder and coating hydroxyapatite sol was prepared and forsterite and bioglass nanopowders with 10 percentage of weight solution were added to sol The prepared sol was stirred at ambient temperature for 24 hours After that the prepared gel was dried at 80 C and was heat treated after aging at a furnace The similar method was used for preparing composite coatings Stainless steel substrate 316L was coated via dip coating XRD TEM SEM EDS and AAS techniques were used for investigating the prepared powders coatings and scaffolds The evaluation of bioactivity was performed and characterized via SEM AAS and Spectrophotometry To investigate the effect of forsterite content the evaluation of the mechanical properties of coatings was performed via nanoindentation tests Results show that calcination at 600 C was appropriate temperature to calcinate the composite powder and coating and avoid forming the secondary phases The crystal size of hydroxyapatite in the prepared powder determined according to Scherer equation was lower than 100nm and was in agreement in results obtained with TEM Results show the functional groups in composite nanopowder The homogenous free crack and adhesive coating with about 25 m thickness was obtained The bioactivity evaluation showed the apatite formation Results showed that increase in forsterite content improve increase the mechanical properties such as hardness elastic modulus and fracture toughness The suitable scaffolds with reinforcement content lower than 50wt contained porosity with 100 m size These porosities were appropriate to differentiation cells The increase in reinforcement the decrease in porosity content These present results show that hydroxyapatite forsterite bioglass composite nanopowder and coating show the hopeful properties for medical applications and especially was suitable for preparing scaffolds Keywords Composite nanopowder Nanostructured coating Mechanical properties Scaffold Particulate Leaching Solvent Casting
استاد راهنما :
محمد حسين فتحي
استاد مشاور :
علي صمدي كوچك داني
استاد داور :
فتح الله كريم زاده، محمدرضا سائري
