ISSN 1070-4272, Russian Journal of Applied Chemistry, 2017, Vol. 90, No. 1, pp. 84−90. © Pleiades Publishing, Ltd., 2017.
Original Russian Text © A.A. Akovantseva, N.A. Aksenova, T.S. Zarkhina, L.I. Krotova, N.V. Minaeva, А.О. Rybaltovskii, B.Ch. Kholkhoev, I.A. Farion, V.I. Yusupov,
V.F. Burdukovskii, V.N. Bagratashvili, P.S. Timashev,
2017, published in Zhurnal Prikladnoi Khimii, 2017, Vol. 90, No. 1, pp. 91−97.
Preparation and Optical Properties of Composite Materials Based
on Polybenzimidazole and Silver Nanoparticles
A. A. Akovantseva
, N. A. Aksenova
, T. S. Zarkhina
, L. I. Krotova
, N. V. Minaev
А. О. Rybaltovskii
, B. Ch. Kholkhoev
*, I. A. Farion
, V. I. Yusupov
, V. F. Burdukovskii
V. N. Bagratashvili
, and P. S. Timashev
Federal Research Center for Crystallography and Photonics, Russian Academy of Sciences, Troitsk, Moscow, Russia
Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
Research Institute of Nuclear Physics, Moscow State University, Moscow, Russia
Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, Ulan-Ude, Buryatia, Russia
Sechenov First Moscow State Medical University, Moscow, Russia
Received July 20, 2016
Abstract—Rigid-chain heat resistant polymers (with poly-2,2'-p-oxydiphenylene-5,5′-bisbenzimidazole as
example) were impregnated for the ﬁ rst time with a silver-containing precursor in formic acid and in supercritical
carbon dioxide. A procedure allowing the precursor reduction to silver nanoparticles both throughout the volume
by thermal annealing of the ﬁ lms in the temperature interval 100–150°С and in the targeted mode using lasers
operating at 405 and 532 nm was developed. It opens prospects for developing a process for production of heat-
resistant optical gratings and light guides. The reduces nanoparticles and their agglomerates have the size in the
interval 50–200 nm and give a plasmon band in the range 450–460 nm.
Polybenzimidazoles (PBIs) exhibiting outstanding
thermal and mechanical properties are of particular
interest among known polymers. They show promise for
the development of materials for aerospace engineering,
hydrogen power engineering, microelectronics, etc.
[1, 2]. Nanocomposites based on PBI also attract growing
researchers’ attention [3, 4], because introduction of
nanosized additives can impart new functional properties
to materials, which, in turn, can signiﬁ cantly expand the
ﬁ elds of their application.
From this standpoint, composites of polymers with
noble metal nanoparticles are of much interest. Owing
to unique optical, electronic, magnetic, and catalytic
properties of such nanoparticles, materials based on them
can be used in optoelectronics, sensorics, catalysis, etc.
[3–5]. For example, the use of various polymer matrices
impregnated with noble metal nanoparticles allows
fabrication of optoelectronic components of Bragg
grating type [6, 7], optical memory units , and sensor
matrices for surface-enhanced Raman spectroscopy
. Polymer-modiﬁ ed carbon materials with supported
noble metal nanoparticles also attract much attention
Several approaches to forming metal nanoparticles
in polymer matrices are known [12–14]. All of them,
as a rule, are based on chemical or physical processes
of reduction of various precursors introduced into the
polymer matrix. The nanoparticles are formed in pores
or gaps between macromolecules. One of promising
methods for introducing metal precursors into polymer
matrices is supercritical ﬂ uid (SCF) impregnation.
This procedure was successfully used for preparing
nanocomposites based on various ﬂ exible-chain
polymers [13, 14]. However, published data on the use
of this procedure for impregnation of rigid-chain heat-
resistant polyheteroarylenes (including PBI) are lacking.