Study: wear and superhydrophobic behaviour of PTFE-ceria composite

Abstract

The present work aims at developing a novel superhydrophobic polymer matrix composite with enhanced wear resistance. First, polytetrafluoroethylene (PTFE) matrices were reinforced with different weight percentages (ranging from 0 to 20%) of ceria particles using the powder metallurgy method. Subsequently, the microtexture of the fabricated composites was varied by sanding them with different grit sizes of emery sheets. The effect of reinforcement was analysed on tribological behaviour of fabricated composites via a pin-on-disk test. Hydrophobic behaviour of textured PTFE and PTFE-20% ceria composite has been discussed. Surface topography and wear morphology of the polymer matrix composites were examined with an aid of SEM. Tribological data revealed that lower friction coefficient and higher wear resistance can be achieved by increasing the weight percentage of ceria particles. A maximum contact angle of 158° with a minimum roll-off angle of less than 3° was found for the PTFE-20% ceria composite.