اميرحسين پوراسحق

In this study, a composite of hydroxyapatite with varying percentages of reduced graphene oxide was prepared using the dry ball milling method. The effect of increasing the percentage of reduced graphene oxide in the composite on the mechanical properties of the scaffold and rheological properties of the printed paste was investigated. The composite scaffolds of hydroxyapatite and reduced graphene oxide were fabricated using one of the common additive manufacturing methods based on extrusion. To prepare a printing ink with flow properties compatible with the extrusion printing process, the appropriate type of binder and the optimal binder-to-powder ratio were first determined. Subsequently, the effect of increasing the weight percentage of graphene oxide on the flow behavior of the ink was studied. As a result, after examining the flow behavior and viscoelastic properties, it was determined that the flow behavior of the inks and the print quality improved with an increase in the percentage of reduced graphene oxide. Furthermore, the compressive strength of the decorated scaffolds was eva‎luated at 1350°C, and both decorated and undecorated scaffolds were examined, demonstrating that with an increase in the percentage of reduced graphene oxide from 2 to 4 weight percent, the compressive strength of the decorated composite scaffolds increased from 2.89 to 11.5 megapascals. Additionally, the compressive strength of the undecorated scaffolds increased from 3.11 to 7.69 megapascals with an increase in the percentage of reduced graphene oxide from 2 to 4 weight percent.

هيدروكسي آپاتيت ، گرافن ، رئولوژي ، داربست ، استحكام فشاري

Hydroxyapatite, Graphene, Rheology, Scaffold, Compressive Strength

Amirhossein Poures`hagh

Dr. Maryam Tajabadi