CNTs, Al2O3 and SiO2 reinforced epoxy: Tribological properties of polymer nanocomposites

Abstract

The present work studied the effect of filling epoxy matrix by different types and concentrations of nanoparticles on the friction and wear behaviors. Various concentrations (0.2%, 0.4%, 0.6%, 0.8% and 1 wt.%) of multi walled carbon nano tubes (MWCNTs), aluminum oxide (Al2O3), and silica (SiO2) nanoparticles were used to reinforce epoxy matrix. These epoxy nanocomposites are widely used as indoor flooring tiles in schools, boutiques, hospitals, offices, conference rooms, homes, trade fair stands and homes for the aged. Experiments involved sliding of the epoxy nanocomposite specimens against rotating steel disc at dry sliding condition. Experiments were carried out using a test rig of pin-on-disc, designed and manufactured for the test. The friction force was measured using load cell which connected with a digital screen to detect the friction force. All experiments were done at room temperature and carried out at constant normal load (7 N), constant speed (0.93 m/sec) and constant running time (300 seconds). The worn surfaces were investigated with back scattered scanning electron microscopy (SEM). Based on the observations in the present work, it was found that addition of the tested filling nanoparticles have greatly affected the friction and highly improves wear resistance.