Electrophoretic Deposition of Hydroxyapatite/Chitosan Coating on Porous Titanium for Orthopedic Application

Abstract

This work is focused on addressing bioinert properties of titanium as orthopedic implant problems by applying surface modification to porous titanium. In this research, electrophoretic deposition of hydroxyapatite (HA) and chitosan (CS) was done on porous titanium prepared by space-holder powder metallurgy. 1 wt% of HA and 0.5 wt% of CS in acetic acid is used as the electrophoretic solution. Deposition voltage was varied in a range of 5-7 V, and the electrophoretic time was between 10 and 15 minutes. Coating morphology, deposition weight, and the adhesive properties of the HA/CS layer were observed in this experiment. 7V-10 minutes specimen and 7V-15 minutes specimen gave the best result due to large HA/CS deposits, covering pores, homogeneous, and having the best adhesivity. The coating quality is increasing in line with the increasing voltage and the electrophoretic time.