Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 6, pp. 957−962.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © O.A. Moskalyuk, E.S. Tsobkallo, V.E. Yudin, M.Ya. Goikhman, A.V. Dobrodumov, E.N. Vlasova, E.M. Ivan’kova, A.N. Aleshin, 2012,
published in Zhurnal Prikladnoi Khimii, 2012, Vol. 85, No. 6, pp. 977−982.
AND POLYMERIC MATERIALS
Mechanical and Conducting Properties
of Polypropylene Fibers Filled with Carbon
Nanotubes with Functionalized Surface
O. A. Moskalyuk
, E. S. Tsobkallo
, V. E. Yudin
, M. Ya. Goikhman
, A. V. Dobrodumov
E. N. Vlasova
, E. M. Ivan’kova
, and A. N. Aleshin
State University of Technology and Design, St. Petersburg, Russia;
Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia
Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, Russia
Received March 20, 2012
Abstract—A procedure for functionalization of the surface of multiwall carbon nanotubes, based on treatment of
the nanoﬁ ller with a strong oxidant and 1-hexadecylamine and aimed to improve the compatibility of nanotubes
with a polypropylene matrix, was examined. Variation of the mechanical and electrical properties of the composite
ﬁ ber based on polypropylene in relation to the concentration of the modiﬁ ed nanotubes was studied.
Multiwall carbon nanotubes (MWCNTs) are of much
interest from both basic and applied viewpoint, because
introduction of nanotubes into a copolymer allows impart-
ing new properties to it: enhanced rigidity and strength,
low electrical resistivity. The materials thus obtained ex-
pand the ﬁ elds of polymer application in leading branches
of the economy.
It is known  that, for NWCNT properties to be mani-
fested in a composite material, the nanotubes should be
uniformly distributed in the bulk of the polymeric matrix.
However, NWCNTs exhibit high energy of interaction
with each other and, as a rule, are in the aggregated state.
Therefore, to improve the compatibility of nanotubes with
a polymeric matrix in formation of composite structures,
it is desirable to perform modiﬁ cation of the MWCNT
surface [2, 3] prior to introducing MWCNTs into the
polymer. Modiﬁ cation of the carbon nanotube surface
can be conventionally subdivided into two categories:
adsorption modiﬁ cation and modiﬁ cation with the forma-
tion of chemical bonds. Grafting of functional groups onto
the surface of nanotubes allows their physicochemical
properties to be improved. Chemical modiﬁ cation of the
nanotube surface with surfactants , aliphatic amines
, ﬂ uorine , or alkanes  allows preparation of a
stable suspension of nanotubes. However, none of these
methods for chemical treatment is versatile. All the
methods are applicable only in unique cases or to deﬁ nite
classes of compounds. The most widely used procedure
for modiﬁ cation of the nanoﬁ ller surface, based on treat-
ment of carbon nanotubes with a strong oxidant with
local degradation of the graphene layer and formation
of functional groups on the nanotube surface, followed
by treatment of these tubes with 1-hexadecylamine, was
described in [8, 9]. The effect exerted by functionalization
of the surface of carbon nanotubes on the mechanical and
electrical properties of polypropylene ﬁ bers ﬁ lled with
these tubes has been studied insufﬁ ciently [8, 10].
In this study we examined the procedure for function-
alization of the surface of carbon nanotubes, based on
their treatment with a strong oxidant and 1-hexadecyl-
amine, with the aim to improve the compatibility of the
nanotubes with the polymeric matrix, and analyzed the ef-
fect of the modiﬁ ed nanotubes on the physicomechanical
properties of the polypropylene matrix prepared as a ﬁ ber.