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RAS Chemistry & Material ScienceКоллоидный журнал Colloid Journal

  • ISSN (Print) 0023-2912
  • ISSN (Online) 3034-543X

ON THE CALCULATION OF ELECTROKINETIC POTENTIAL IN DETONATION NANODIAMOND DISPERSIONS

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PII
S3034543XS0023291225020043-1
DOI
10.7868/S3034543X25020043
Publication type
Article
Status
Published
Authors
L. E. Ermakova
  • Affiliation:
N. S. Chuikov
  • Affiliation:
A. V. Volkova
  • Affiliation:
Volume/ Edition
Volume 87 / Issue number 2
Pages
118-127
Abstract
The applicability of various approximations of the theory of electrophoresis for calculating the electrokinetic potential in real nanodisperse systems was evaluated on the example of the polydispersed aqueous sol of thermooxidized detonation nanodiamond containing aggregates of nanoparticles, depending on the concentration and pH of background electrolyte solutions (NaCl). It was found that at low potentials |ζ| < 25 mV calculated for the primary particles in the framework of the Wiersema’s model, taking into account particle aggregation and aggregate porosity practically does not affect the electrokinetic potential. In the range |ζ| 25-50 mV, the most reliable values of the electrokinetic potentials of aggregates seem to be obtained using the Miller’s equation for ion-conducting particles, taking into account their real porosities providing that the potential is constant. At |ζ| > 50 mV, knowing the real size of the aggregates, assuming that they are monolithic, the Overbeek’s equation with Oshima’s analytical expressions of the functions f(κr) and f(κr) can be used to calculate the electrokinetic potentials.
Keywords
детонационный наноалмаз первичная наночастица агрегат электрофоретическая подвижность электрокинетический потенциал теория электрофореза
Date of publication
27.12.2024
Year of publication
2024
Number of purchasers
0
Views
19

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