Bulk Viscosity of a Suspension of Silicon Oxide Nanoparticles

Abstract

Data on the bulk viscosity of an aqueous suspension of SiO2 nanoparticles (Ludox TM-50) have been obtained for the first time using an acoustic spectrometer. A wide range of nanoparticle mass concentrations (from 1 to 50 wt %) has been investigated. Spectra of the ultrasound attenuation coefficient and coefficients of longitudinal and dynamic viscosities have been measured. Dependences of the dynamic and bulk viscosity coefficients of the suspensions on the nanoparticle concentration have been obtained.