Study the Flow Behavior of Gnanops Filled Water Using Cone-On Pale Viscometer

Abstract

This work investigates the rheological behavior of gold nano particles filled water (GNPS- water) prepared by Nd - YAG laser ablation. Noble metal goldNPs were synthesized by pulsed (Q-switched, 1064-Nd: YAG,10 ns pulse duration and energy  E=550mJ and 650mJ laser ablation of gold metal plates immersed in double distilled and deionised water DDDW. Absorbance spectra of the produced nanoparticles solution was measured by UV-VIS spectrophotometer which show sharp and single peaks 530 nm indicating the produced Au nanoparticles with a narrow size ranging from 10nm to 20 nm with almost spherical shape.The morphology and size was estimated by TEM .The rheological behavior of GNPs filled water with particle sizes (10 nm) and (20 nm) called nano1 and nano2 respectively were tested using cone –on - plate viscometer.The viscosity, torque, shear stress where measured at different shear rate. The results show that the shear stress increases with the shear rate increasing for nano1 and nano2. The viscosity decreased with the shear rate increasing for nano1 and nano2.The viscosity for 10 nm concentration is lower  than that for 20 nm concentration due to the difference in particles size and energy value .

Keywords: GNPS- water, Viscosity, Flow behavior, Shear Thinning, Cone –on - plate viscometer.