Improvement of Methods for Studying the Electrophysicala Viscous Properties of Liquids

Abstract

To control the physical properties of polar and nonpolar liquid media, the parameters of model systems based on paraffin and silicone oils, as well as glycerin, were measured using electrophysical and acoustoelectric methods. Electrophysical studies were performed with an Agilent E4980A LCR meter and a measuring cell consisting of an Eppendorf tube and two coaxial nickel electrodes forming a cylindrical capacitor. The permittivity of the liquid was determined from the formula for the capacitor. For the acoustic part of the problem, ST,X-quartz was used as the piezoelectric plate, on which a fluoroplastic cell for liquid was placed. The measurements were carried out in three stages: measurement of the phase and amplitude of the acoustic wave (i) without contact with the liquid, (ii) in contact with a pure test liquid, and (iii) in contact with the test liquid with a filler. Microparticles of pharmaceutical activated carbon and the surfactant sorbitan monooleate were used as fillers. The viscosity of the suspensions was determined from the difference between the attenuation of an acoustic wave in the presence of the pure liquid and liquid with filler.