Abstract
Biomaterials, such as hydroxyapatite (HA), may present different rates of reabsorption in the organism depending on the pathology to be treated. The organism reabsorption rate depends on the physicochemical properties of the biomaterial, where the superficial condition has a fundamental importance. The aim of this work was to develop an HA-based biomaterial with sodium silicate (Na2SiO3) as a dispersant and with the potential to form bioglass on the surface, in addition, to know the rheological conditions to obtain suitable products by wet conformation, by colloidal processing route. The material used was characterized in terms of particle shape, observed in a microscope, and specific surface area. The suspensions rheological measurements were performed in a rotational rheometer. It was observed the possibility of production of the proposed biomaterial shaped by slip casting, using suspensions with 2.0 wt% of sodium silicate, preferably working at shear rates below 200 s-1.
Keywords:
rheology; hydroxyapatite; biomaterials; slip casting
