Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
RHEOLOGY OF GRAPHENE OXIDE SUSPENSIONS ON YIELD STRESS FLUID
Submission Author:
Lorena Moraes , RJ
Co-Authors:
Lorena Moraes, Monica Naccache
Presenter: Lorena Moraes
doi://10.26678/ABCM.COBEM2019.COB2019-0931
Abstract
In this work we investigate the rheology of graphene oxide (GO) suspensions on a yield stress model fluid. Aqueous solution of Carbopol® Ultrez 10 was the dispersant used, and it is a transparent, non-toxic yield stress fluid with elasticity. The rheology of the suspensions was analyzed in relation to the dispersion method applied and concentration of GO. Tests with shear flow in permanent and oscillatory regimes were performed. For the different dispersion methods applied there was no change in the rheology of the suspensions. The increase in GO concentration leads to a decrease in elasticity, viscosity, and yield stress. pH measurements indicate the suspensions become more acidic with increasing GO concentration, although there is no strict relationship between the pH and yield stress values.
Keywords
Nanofluids, graphene oxide, Suspensions, Yield Stress Fluids
