Assessment of toothpaste abrasives and design of toothbrushes
Work significantly funded by Industry utilises profilometry, gloss measurements and SEM to investigate mechanistic actions of dental dentifrices in oral hygiene and tissue wear.
High Strain-rate Micro-compression Tester
A novel instrument was developed that allows the material properties of the walls of cells and microcapsules to be characterised. Because of the high strain rates, high quality information were obtained on wall viscoelastic behaviour and (where it occurs) water loss through porous walls. Amongst other applications, these will allow differences between growing and mature plant cell walls to be determined. The research was a unique combination of micromanipulation, piezo-electric technology, a high-speed camera, image analysis, and finite element modelling.
The nucleation and growth of apatite on chemically treated titanium
Electrochemical impedance spectroscopy (EIS) measurement was used to investigate the nucleation and growth of apatite on chemically treated pure titanium immersed in the SBF solution. An appropriate equivalent circuit model was constructed to describe the nucleation and growth of apatite. It may quantify apatite growth on pretreated titanium substrates.
Functionally graded calcium phosphate coatings
To improve the properties of coatings and the bond strength between the coating and the substrate, attempts were made to develop functionally graded coatings (FGCs) of calcium phosphate and titanium. The FGCs were produced by sequentially Ar+ ion beam sputtering/mixing calcium phosphate and calcium phosphate/Ti targets (from the 100% Ti target to the 0% Ti target).