E. V. Golikova* and Yu. M. Chernoberezhskii**
* Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
ul. Odoevskogo 24/2, St. Petersburg, 199155 Russia
** St. Petersburg Technological University of Plant Polymers,
ul. Ivana Chernykh 4, St. Petersburg, 198095 Russia
Abstract—The aggregate stability of binary mixtures that contain two hydrophobic components [SiO2–
FeOOH, Au–Fe(OH)3], hydrophobic and hydrophilic components (SiO2–ZrO2, SiO2–CeO2, FeOOH–natural
diamond), and two hydrophilic components (CeO2–natural diamond, ZrO2–natural diamond) is investigated by
photometry and ultramicroscopy over wide ranges of KCl concentrations and pH. It is shown that the stability
of binary mixtures containing one or two hydrophobic components can be qualitatively explained in terms of
the Derjaguin theory of heterocoagulation of hydrophobic colloids. The stability of mixed binary sols is deter-
mined by the stability of the component with a dominant number concentration of particles. The heteroadagu-
lation stabilization due to the ionic electrostatic or structural stability ratio of the nanosized component in the
mixture is revealed.
Pleiades Publishing home page | journal home page | top
If you have any problems with this server, contact webmaster.