ISSN 1070-4272, Russian Journal of Applied Chemistry, 2014, Vol. 87, No. 5, pp. 634−639 © Pleiades Publishing, Ltd., 2014.
Original Russian Text © A.M. Bochek, A.A. Murav’ev, N.P. Novoselov, E.N. Popova, Yu.N. Sazanov, V.K. Lavrent’ev, 2014, published in Zhurnal Prikladnoi Khimii,
2014, Vol. 87, No. 5, pp.
AND POLYMERIC MATERIALS
Numerous recent papers deal with preparation of
polymeric materials with new functional properties by
combining the polymers in a common solvent. This
method is more feasible than the methods involving
chemical modiﬁ cation of the polymers used. The proper-
ties of solutions of cellulose and other synthetic polymers
in ionic liquids of various structures are being actively
studied today . The possibility of dissolving other poly-
mers along with cellulose opens prospects for preparing
composite materials with new properties.
One of the main directions of reprocessing of poly-
acrylonitrile ﬁ bers is preparation of carbon ﬁ bers (CFs).
Carbon ﬁ bers are a high-strength material used mainly as
reinforcing additive for enhancing the strength of compos-
ite materials: carbon-reinforced plastics, carbon–carbon
materials, etc. . At elevated temperatures, the strength
and elastic modulus of CFs are higher compared to ﬁ bers
prepared from other materials, and CFs are resistant to
mechanical corrosion, whereas ﬁ bers prepared from glass
and organic polymers degrade in aggressive media .
Composite materials based on CFs are ideally suitable
when high strength, rigidity, and low weight are required.
They exhibit high heat resistance, chemical inertness,
electrical and thermal conductivity, and low coefﬁ cient
of linear thermal expansion .
Initially CFs were prepared from natural cellulose
materials such as cotton and ﬂ ax ﬁ bers in production of
incandescent lamp ﬁ laments [3, 4]. A process for car-
bonization of viscose ﬁ bers in CFs for use in aerospace
engineering was developed in the 1950s . A break-
through in CF production occurred in the late 1960s after
the commercial production of polyacrylonitrile ﬁ bers was
started. These ﬁ bers give higher CF yield (50%) compared
to viscose ﬁ bers (30%). Furthermore, the procedure for
Composite Cellulose–Polyacrylonitrile Films Prepared
from Solutions in a Mixed Solvent,
A. M. Bochek
, A. A. Murav’ev
, N. P. Novoselov
E. N. Popova
, Yu. N. Sazanov
, and V. K. Lavrent’ev
Institute of Macromolecular Compounds, Russian Academy of Sciences,
Bol’shoi pr. 31, St. Petersburg, 199004 Russia
St. Petersburg State University of Technology and Design,
ul. Bol’shaya Morskaya 18, St. Petersburg, 191186 Russia
Received June 5, 2014
Abstract—Composite ﬁ lms were prepared from solutions of cellulose–polyacrylonitrile blends in a mixed
solvent, 1-butyl-3-methylimidazolium chloride–dimethylformamide. The rheological properties of the solutions
were studied. The structural organization and heat resistance of the composite ﬁ lms were examined by X-ray
diffraction and thermal gravimetric analysis. Introduction of cellulose into the polyacrylonitrile matrix decreases
the temperature of polyacrylonitrile cyclization onset and enhances the heat resistance of the composite ﬁ lms.