Third Day Poster Session, 17 June 2010 - NanoTR-VI

Poster Session, Thursday, June 17
Theme F686 - N1123
Synthesis of Noncarbon Nanotubes/ conductive Polymer nanocomposite in free solvent media
G.R. Kiani 1* and A. Rostami 2
1 Department of Applied Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran
2 School of engineering, emerging technologies, University of Tabriz, Tabriz, Iran
Abstract- Conducting polymer/ halloysite nanotubes composite were obtained by a mechanochemical reaction in the
solid state by milling system. The halloysite nanotubes(HNT) were coated with 2, 5- dithienyl pyrrole(SNS) via the
in situ chemical oxidation polymerization. The characterization by transmission electron microscopy showed that
the nanotubes were completely covered with conducting polymer. The nanocomposite was characterized using
FTIR, X-ray diffraction, TGA and transmission electron microscopy. The conductivity of the nanocomposite was
found to be 0.0066 (cm) -1 . (HNT) provide a new avenue for the preparation of nanocomposites.
Conducting polymer nanotubes have recently
become the object of numerous investigations
because of their great potential in device
applications, such as transistors [1], sensors [2],
actuators and batteries [3], and so on. Holloysite has
a wide variety of biological and non-biological
applications. It has been used for storing molecular
hydrogen [4], for catalyst conversions and
processing of hydrocarbons [5] and for removing
environmental hazardous species [6].
HNT and SNS in the presence of ammonium
presulphate were placed in the ball milling apparatus
and the mixture was milled for 30 minute at room
temperature (25 Hz). The black powder of HNT-SNS
nanocomposite was washed with water, and ethanol,
then the dried in vacuum.
TEM images of halloysite nanotubes (HNT) and
HNT-SNS show that the halloysite nanotubes were
coated with 2, 5- dithienyl pyrrole(SNS) via the in
situ chemical oxidation polymerization. Also it is
obvious that the poly SNS layer with the thickness of
about 40 nm was only coated onto the outer surfaces
of the HNTs.
Figure2: FT-IR spectras of a) HNT b) HNT-SNS nanocomposite
The conductivity of the HNT-SNS nanocomposite
was found to be 0.0066 (cm) -1 and the conductivity
value was acceptable.
Figure1: TEM images of a) HNT b) HNT-SNS nanocomposite.
Figure 2 shows the IR spectra of HNT, HNT-SNS
product. The bands at 790 and 750 cm 1 in the HNT
spectrum are assigned to the translational vibrations
of the external OH groups as well as the out-of-plane
OH bending according to the literature. Also the
bands in 1600 and 3500 cm -1 for SNS in Fig 2b
shows C=C and N-H respectively.
Fig. 3 shows the XRD for the HNT and
nanocomposite. It is obvious that the SNS has an
amorphous structure so that it appears in 15-35 (2)
in the nanocomposite structure.
Figure 3: X-ray diffractograms of HNT and HNT-SNS.
In summary, HNT/ conducting polymer
nanocomposite were synthesized first time using
milling system and its characteristics were
determined. The halloysite nanotubes offer an
alternative to carbon nanotubes due to their viability
and low cost.
*Corresponding author: kiani1348@gmail.com and
kiani_gholamreza@yahoo.com
[1] A.N. Aleshin, Adv. Mater. 18, 17 (2006).
[2] M. Kanungo, A. Kumar and A.Q. Contractor, Anal. Chem. 758,
5673 (2003).
[3] R.H. Baughman, Science 308, 63 (2005).
[4] X. Wang and M. L. Weiner US Patent Specification
0233199 (2005)
[5] R. Klimkiewicz and B. D. Edwarda J. Phys. Chem.
Solids 65 459 (2004).
[6] Z. Lin and R. W. Puls Environ. Geol. 39 753(2000).
6th Nanoscience and Nanotechnology Conference, zmir, 2010 720