مسعود حافظی اردکانی
استادیار، پژوهشکده فناوری نانو و مواد پیشرفته، پژوهشگاه مواد و انرژی
[ 1 ] - سنتز ترکیبات دو فازی تری کلسیم فسفات – هیدروکسی آپاتیت به روش واکنش حالت جامد: بررسی اثر درجه حرارت و نسبت Ca/P مواد واکنشگر بر نوع و مقدار فازهای تشکیل یافته
در این تحقیق اثر درجه حرارت و همچنین نسبت کلسیم به فسفر مواد اولیه بر نوع و مقدار فازهای تشکیل شده از روش سنتز به صورت واکنش حالت جامد بررسی شده است. کربنات کلسیم و دی کلسیم فسفات به عنوان مواد اولیه تهیه و با نسبت‌های مختلف طوری مخلوط شدند که نسبت نهایی کلسیم به فسفر در بچ های مختلف بین 1.50 تا 1.67 بود. سپس هر یک از این مخلوط‌ها در دمای 800 تا 1200 درجه سانتیگراد به مدت 3 ساعت حرارت دهی...
[ 2 ] - Synthesis of nano-structured sphene and mechanical properties optimization of its scaffold via response surface methodology
Nano-structured sphene (CaTiSiO5) powder was synthesized via mechanical activation and heat treatment method. The synthesized powder was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and simultaneous thermal analysis (STA). The sphene scaffolds were then fabricated via porogen method (using citric acid). Response surface methodology was successfully used to d...
[ 3 ] - In vitro behavior of silk fibroin-coated calcium magnesium silicate scaffolds
Bioceramic scaffolds such as silicate bioceramics have been widely used for bone tissue engineering. However, their high degradation rate, low mechanical strength and surface instability are main challenges compromising their bioactivity and cytocompatibility which further negatively affect the cell growth and attachment. In this study, we have investigated the effects of silk fibroin coating o...
[ 4 ] - Poly (lactic-co-glycolic)/nanostructured merwinite porous composites for bone tissue engineering: II. structural and in vitro characterization
Several characteristics of a novel PLGA/Merwinite scaffold were examined in the present study to evaluate the possible applications in bone tissue regeneration. Physical and mechanical properties, as well as degradation behavior and in vitro bioactivity of porous scaffolds produced by solvent casting and particle leaching technique were also characterized. Results showed that incorporation of m...