TY - JOUR

T1 - An Electrooptical Method for Studying the Coagulation of Nanodisperse Systems

T2 - Formation of Aggregates of Graphite Particles in Aqueous Electrolytes

AU - Vezo, O. S.

AU - Voitylov, A. V.

AU - Voitylov, V. V.

AU - Petrov, M. P.

AU - Trusov, A. A.

N1 - Publisher Copyright: © 2020, Pleiades Publishing, Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/6/1

Y1 - 2020/6/1

N2 - Abstract: We demonstrate that the electrooptical method can be used to study the coagulation of liquid nanodisperse systems, in particular, colloids and suspensions. Two electrooptical effects have been used—one dependent and one independent of the polarization of light passing through the system in the electric field. The results of study of the coagulation kinetics at its early stage, associated with the formation of pair aggregates from graphite particles suspended in AlCl3 and Th(NO3)4 aqueous electrolytes are presented. We show that the systems are stable in a wide range of electrolyte concentrations and lose their stability in a narrow range in which the electrokinetic potential of particles does not exceed 5 mV. We show that the electrooptically determined dependences of the particle concentration on the coagulation time at the isoelectric point agree well with the Smoluchowski theory of rapid coagulation.

AB - Abstract: We demonstrate that the electrooptical method can be used to study the coagulation of liquid nanodisperse systems, in particular, colloids and suspensions. Two electrooptical effects have been used—one dependent and one independent of the polarization of light passing through the system in the electric field. The results of study of the coagulation kinetics at its early stage, associated with the formation of pair aggregates from graphite particles suspended in AlCl3 and Th(NO3)4 aqueous electrolytes are presented. We show that the systems are stable in a wide range of electrolyte concentrations and lose their stability in a narrow range in which the electrokinetic potential of particles does not exceed 5 mV. We show that the electrooptically determined dependences of the particle concentration on the coagulation time at the isoelectric point agree well with the Smoluchowski theory of rapid coagulation.

KW - coagulation

KW - colloids and suspensions

KW - electrooptical effects

KW - graphite particles

KW - pair aggregates

KW - static and dynamic light scattering

KW - SINGLE

KW - DIAMOND

KW - DISPERSION

KW - FIELD

KW - COLLOIDAL PARTICLES

KW - LIGHT-SCATTERING

UR - http://www.scopus.com/inward/record.url?scp=85087981195&partnerID=8YFLogxK

U2 - 10.1134/S0030400X20060247

DO - 10.1134/S0030400X20060247

M3 - Article

AN - SCOPUS:85087981195

VL - 128

SP - 719

EP - 728

JO - OPTICS AND SPECTROSCOPY

JF - OPTICS AND SPECTROSCOPY

SN - 0030-400X

IS - 6

ER -