Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 7, pp. 1133−1136.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © M.N. Gorbunova, I.V. Val’tsifer, L.G. Chekanova, 2012, published in Zhurnal Prikladnoi Khimii, 2012, Vol. 85, No. 7, pp. 1168−1171.
AND POLYMERIC MATERIALS
Nanocomposites of Silver and Copolymers
Chloride with Vinyl Acetate
M. N. Gorbunova, I. V. Val’tsifer, and L. G. Chekanova
Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences, Perm, Russia
Received April 12, 2011
Abstract—New water-soluble nanocomposites consisting of silver nanoparticles and copolymers of 2,2-diallyl-
1,1,3,3-tetraethylguanidinium chloride with vinyl acetate were prepared. These nanocomposites show promise
for the development of new water-soluble antiseptics and biocides.
Nanocomposites containing metal particles in a poly-
meric matrix are of interest for medicine, electronics,
nanophotonics, and catalysis [1–3]. Silver nanoparticles
exhibit antimicrobial activity, which allows their use for
preparing antibacterial formulations . Preparation of
silver nanocomposites involves a problem with the stabil-
ity of silver nanoparticles. It is known from the literature
that the particle stability is strongly affected by the nature
of the nanostabilizing matrix [4, 5].
Saifullina et al. , using a borohydride route,
prepared highly stable hydrosols with isolated silver
nanoparticles, stabilized with poly-N-vinylpyrrolidone.
Hydrophilic poly-N-vinylpyrrolidone is also used for
stabilization of sols and simultaneous reduction of silver
ions to the molecular metal state in aqueous-alcoholic
solutions in production of Poviargol drug in Russia [6, 7].
Electron-microscopic examination showed that Poviargol
contains aggregates of silver nanoparticles. Electropho-
retic analysis indicated that the silver particles in all the
examined systems are electrically neutral .
Myachina et al. [8, 9] prepared nanocomposites
consisting of silver nanoparticles and homo- and copo-
lymers of 1-vinyl-1,2,4-triazole, which show promise
for the development of new water-soluble antiseptics
The goal of this study was to prepare new nanocom-
posites consisting of silver nanoparticles and copolymers
of 2,2-diallyl-1,1,3,3-tetraethylguanidinium chloride with
(AGC) was prepared by the procedure described in .
inyl acetate (VA; Lancaster) was distilled; the fraction
with bp 72°С, n
1.3951, was collected. The initiator
[azobis(isobutyronitrile) (AIBN)] and the solvents used in
the study, after puriﬁ cation by standard procedures ,
had the characteristics consistent with the reference data.
Copolymerization of AGC with VA was performed in
the bulk in the presence of
AIBN . The copolymers
were puriﬁ ed by twofold reprecipitation from a solution
in methanol into diethyl ether and were vacuum-dried at
40–50°С to constant weight. The copolymer compositions
were calculated from the results of elemental analysis.
Nanocomposites of silver and AGC–VA copolymer
were prepared as follows. AGC copolymer (10
was dissolved in 70 ml of water, a 1% solution of silver
nitrate (0.17–0.51 g, 10
–3 × 10
mol) was added, and
the mixture was stirred for 1 h at room temperature. Then
0.038–0.38 g (10
mol) of sodium borohydride was
added in portions over a period of 10 min. The resulting