Impinging jet study of the deposition of colloidal particles on synthetic polymer (Zeonor)

Abstract

In this study, an impinging jet deposition experiments were performed on synthetic polymer (Zeonor) original and by micro-embossing modified substrates with exactly defined topology as confirmed by AFM and SEM. Deposition experiments were performed at ambient temperature and at selected flow regime of Re = 10. As a particles deposited a polystyrene (PS) 1,1 μm diameter particles (Sigma-Aldrich) were used having negative charge of -20 mV as observed by zeta potential experiments. There was found gradual increase of total number of deposited particles with time reaching steady state number. Obtained kinetic curves were fitted to the theoretical blocking model where characteristic time required to reach the steady state (blocking time) as well as steady state number of deposited particles were calculated.