Electronic Thesis and Dissertation Repository


Master of Engineering Science


Chemical and Biochemical Engineering


Jesse Zhu

2nd Supervisor

Hiran Perinpanayagam

Joint Supervisor


A series of sol-gel derived silica-titania hybrid coatings for dental implants were prepared in this research project to improve the implants’ bioactivities. Rosin was used as a space-occupying material to create a porous surface layer with increased roughness. The proper formulation of mixed sols and the parameters for the spin coating procedure were first tested on glass and aluminum substrates. Subsequently the most promising techniques were applied to titanium. SEM analysis was conducted to demonstrate the morphology of the coated specimens. The hardness, adhesion and abrasion resistance of the coated titanium substrates were tested out. Bioactivities of the hybrid coatings on titanium were evaluated by immersing treated specimens into simulated body fluid (1.5SBF). The porous silica-titania hybrid coatings were shown to provide the most desirable surface morphology, mechanical property and bioactivity.