Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 1, pp. 132−138.
Pleiades Publishing, Ltd., 2009.
Original Russian Text
V.E. Proskurina, V.A. Myagchenkov , 2009, published in Zhurnal Prikladnoi Khimii, 2009, Vol. 82, No. 1, pp. 133−140.
AND POLYMERIC MATERIALS
Effect of Concentration and Composition of Anionic Copolymers
of Acrylamide on Flocculation Characteristics of Titanium
Dioxide Suspension (Anatase)
V. E. Proskurina and V. A. Myagchenkov
Kazan State Technological University, Kazan, Tatarstan, Russia
Received July 22, 2008
Abstract—The kinetics of restricted sedimentation of model disperse system, titanium dioxide suspension of anatase
modification, at dosed addition of high-molecular anionic acrylamide copolymers with various concentrations of
ionogenic chains into a water-salt system (0.06 N NaCl) was studied. The effect of concentration and composition
of the acrylamide copolymers on their integral and differential flocculation activities was analyzed.
In recent decade titanium dioxide of various
modiﬁ cations has been studied in a large number of
scientiﬁ c works, which is largely determined by wide
spectrum of its application in various research and in
industrial objects. Titanium dioxide is used as optical
material, photocatalyst, and sensitizer for solar elements.
Also, it is used as protective layer and ﬁ ller for composite
polymeric materials and dielectric ceramics and as a
model disperse system [1−3].
A particular interest to titanium dioxide is associated
with a potential ability to control on nanoscale and in
wide range its morphology, because this characteristics
determines a majority of functional properties of the
materials on its basis. A variety of the TiO
structures, mainly of anatase, rutile, and brookite modiﬁ ca-
tions, is also the important factor facilitating successful
application of these materials. Each of the aboveTiO
modifications possesses individual physicochemical
properties and surface characteristics, which largely
determines speciﬁ city of its application [4, 5].
Titanium dioxide with anatase and rutile structure
is used as ultramicroheterogeneous protective coating
onto metallic, ceramic, and polymeric articles. In
development of the above articles, problems associated
with aggregation and sedimentation stability of TiO
suspensions are especially important . In addition,
suspension as standard is actively used in
foreign practice for comparative estimate of ﬂ occulation
characteristics of water-soluble copolymers [ﬁ rst of all, of
copolymers of acrylamide (AA) being the most effective
and available of them] [7−9]. Marked differences in
sizes and surface characteristics of particles of dispersed
phase (DP) and in the parameters of rutile and anatase
crystalline structures are mainly responsible for the
different aggregation and sedimentation stabilities of
these modiﬁ cations .
In this communication the kinetic parameters of
titanium dioxide of anatase modiﬁ cation were studied in
the mode of restricted sedimentation at dosed introduction
into the disperse medium of high-molecular anionic
acrylamide copolymers with varied concentration of
suspension [anatase modification, TU
(Technical Specifications) 6-09-2166-77] with the
average particle radius R = 3.2 μm was chosen as model
disperse system for estimating the ﬂ occulation ability
of the water-soluble copolymers under study. As water-
soluble polymeric ﬂ occulants (PAFs) served four samples
of random anionic copolymers of acrylamide and sodium
acrylate having high molecular weights (M > 1×10