پديد آورنده :
محمدي زهراني ، احسان
عنوان :
تهيه و مشخصه يابي پودر نانو متري فلوئور هيدروكسي آپاتيت به روش سل - ژل و سنتز مكانو شيميايي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب و روش ساخت مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
ده، 147،[II]ص: مصور ، جدول، نمودار
يادداشت :
ص.ع به: فارسي و انگليسي
استاد راهنما :
محمد حسين فتحي
توصيفگر ها :
زيستمواد , بيوسراميك ها
تاريخ نمايه سازي :
23/01/1388
استاد داور :
احمد منشي ، امان الله امين الله
چكيده فارسي :
به فارسي و انگليسي : قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
AbstractFluorine substituted hydroxyapatite FHA has attracted much attention and increasinglyinvestigated as clinical restoration materials in recent years due to the extensive findings ofpartially fluoridated hydroxyapatite in bone and teeth and also favorable effect of fluorideon bone ingrowth In this study FHA powders were synthesized by solid state reaction viamechanical alloying MA method and sol gel route with a chemical composition of Ca10 PO4 6 OH2 xFx with x 0 0 0 5 1 0 1 5 and 2 0 The MA process was done underdifferent conditions I V in order investigating the effect of MA parameters on thesyntheses and characterize of produced nanopowders The synthesized powder wascharacterized using X ray diffraction XRD Transmission electron microscopy TEM Fourier transform infrared FTIR spectroscopy and ICP OES analysis to evaluate phasecomposition morphology and particle size functional chemical group and purity ofproducts respectively The in vitro test was performed by immersion of powders inKokubo s SBF medium up to 4 week The changes of pH of the SBF medium weremeasured at pre determined time intervals using a pH meter The calcium and phosphorousions concentrations of SBF medium were determined using ICP OES analysis The apatiteformation on the surface of the samples as consequence of the dissolution and precipitationprocess of calcium phosphate was investigated by scanning electron microscopy SEM FTIR results combined with the X ray diffraction exhibited single phase of homogeneousFHA with carbonate peaks in the FTIR spectrum after 6 hr under the best MA conditions condition III TEM results showed that obtained powder after 6hr of milling under thecondition III was compost of FHA nanoparticles 35 65 nm In vitro test illustrated thatdissolution rate of FHA decreased as a result of increasing fluorine content of FHApowders Moreover the larger quantity of tiny nucleus was observed on surface offluorapatite samples with respect to other samples However the quantity of precipitatedbone like apatite crystals on the surface of samples decreased as fluorine content increased
استاد راهنما :
محمد حسين فتحي
استاد داور :
احمد منشي ، امان الله امين الله
