Dielectric constant study of polyaniline magnesium stanate mg sno3 composites

1. INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND
International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print),
ISSN 0976 – 6359(Online), Volume 5, Issue 11, November (2014), pp. 13-16 © IAEME
TECHNOLOGY (IJMET)
ISSN 0976 – 6340 (Print)
ISSN 0976 – 6359 (Online)
Volume 5, Issue 11, November (2014), pp. 13-16
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© I A E M E
DIELECTRIC CONSTANT STUDY OF POLYANILINE -
MAGNESIUM STANATE (MgSnO3) COMPOSITES
Venkatesh B. P1, Sangshetty Kalyane2
1Department of Physics, Singhania University, Pacheri Bari Jhunjhunu, Rajastan, India
2Department of Physics, BKIT, Bhalki, Karnataka, India
ABSTRACT
Chemical route for the synthesis of polymer composites with oxide materials enhances the
composite technology. Polyaniline (PANI) and Polyaniline-magnesium stanate (PANI-MgSnO3)
composite material was prepared by insitu polymerization of aniline with Magnesium stanate
(MgSnO3) as composite material. Variation in the oxide composition with polymer matrix is
maintained to know its detailed changes. The dielectric behavior is also investigated in the frequency
range 102–107 Hz at room temperature. The dimensions of MgSnO3 particles in the matrix have a
greater influence on the observed dielectric values.
Keywords: Synthesis, Composites, Dielectric Constant, Polyaniline, MgSnO3.
1. INTRODUCTION
The technological importance of basic research and its development on conducting polymer
has been carried for new properties and applications [1]. Magnesium stagnate (MgSnO3) is a
materials shows good electrical and optical properties [2-3]. Various techniques have been used for
the preparation of Magnesium stanate materials [4-6]. More recently, there has been considerable
attention on the synthesis of MgSnO3 with additional properties for potential applications [7-8]
However, new approach on conducting polymer composite materials integrates the technology of
conducting polymeric materials. Metal oxide inserted Polymers constitute polymer composites,
which are well studied for its properties [9-11]. Conducting polymers have a variety of applications
in various fields, such as in Industry, Scientific and in medical (ISM) fields. Applications like
anticorrosion, static coating electromagnetic shielding etc., comes under first generation. Second
Generation of electric polymers have applications such as transistors, LEDs, solar cells, batteries etc.
Controlled conductivity, high temperature resistance, low cost and ease of bulk preparation make

2. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print),
ISSN 0976 – 6359(Online), Volume 5, Issue 11, November (2014), pp. 13-16 © IAEME
these materials attractive in the engineering and scientific world. Among conducting polymers,
polyaniline is the most extensively studied polymer obtained by simple chemical or electrochemical
route. Polymeric materials have become an area of increasing interest in research because of the fact
that these materials have great potential for solid state devices [12-13]. This polyaniline has received
much attention because of its high electrical conductivity and ease of preparation at low cost. The
demand of high quality materials for electromagnetic compatibility is alarmingly increasing [14].
Metal oxides dispersed polymer composites have attracted a great deal of interest from researchers,
because they frequently exhibit unexpected hybrid properties synergistically derived from both
components. Magnesium stanate (MgSnO3) is one of the examples of oxide material, which is
known for progressive properties and applications [15]. Composite of Magnesium stagnate
(MgSnO3) dispersed PANI with variable compositions my lead to desirable properties and new
applications. These materials are especially important owing to their bridging role between the
worlds of conducting polymers [16-18]. In this paper, we describe the synthesis of PANI and
Magnesium stanate (MgSnO3) dispersed PANI composite materials through insitu polymerization
method. Dielectric study of the as prepared PANI composite material is also well studied for its
dielectric behavior.
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2. EXPERIMENTAL
Materials and Methods
Ammonium persulphate (NH4)2S2O8, Hydrochloric acid (HCl) and Magnesium stanate
(MgSnO3) used were of AR grade. Doubly distilled water and aniline is used as a solvent and a
monomer. Polyaniline is prepared by oxidative method and Polyaniline composites were prepared by
insitu polymerization method with dispersion of Magnesium stanate in polyaniline.
Synthesis of Polyaniline/Magnesium stanate (MgSnO3) Composites
Aniline was dissolved in 1m HCl to form polyaniline (PANI). Magnesium stanate (MgSnO3)
was added to PANI solution with vigorous stirring to keep the Magnesium stanate (MgSnO3)
suspended in the solution. To this reaction mixture, 0.1M of ammonium persulphate [(NH4)2S2O8],
which acts as an oxidant, was added slowly with continuous stirring for 4-6 hours at 0-5OC. The
precipitated powder recover was vacuum-filtered and washed with deionizer water. Finally, the
resultant precipitate was dried in an oven for 24 hours to achieve a constant weight. In the similar
manner pure PANI is prepared without adding Magnesium stanate
PANI/ Magnesium stanate (MgSnO3) composites were prepared in weight percent ratio in
which the concentration of Magnesium stanate (10, 30, and 50wt %) was varied. The test samples to
be used were prepared in pellet form of diameter 10mm and thickness 3mm by applying pressure of
7t using Pye-Unicam dye. The contacts for these composites were made using silver paste as
electrodes on both sides.
AC conductivity measurements were carried out at room temperature over the frequency
range 102-107Hz using the Hiokie LCR Q meter.
3. RESULTS AND DISCUSSION
3.1. Polyaniline – Magnesium stanate (MgSnO3) composites
Figure 1 shows the variation of ' as a function of frequency for polyaniline – MgSnO3
composites (different wt %). it is observed that, the dielectric constant is quite high at low frequency
and decreases with increase in applied frequency but 30wt% of composite shows maximum value.
The observed behavior may be due to Debye like relaxation mechanism taking place in all these
materials.

3. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print),
ISSN 0976 – 6359(Online), Volume 5, Issue 11, November (2014), pp. 13-16 © IAEME
1 0 % P M S
3 0% P M S
5 0% P M S
15
0 .0 5 .0 x 1 0
6
1 .0 x 1 0
7
1 .5 x 1 0
7
2 .0 x 1 0
7
2 .5 x 1 0
7
4 .0 x 1 0
3 .5 x 1 0
3 .0 x 1 0
2 .5 x 1 0
2 .0 x 1 0
1 .5 x 1 0
1 .0 x 1 0
5 .0 x 1 0
6
6
6
6
6
6
6
5
0 .0
e'
F e rq u e n c y
Figure 1: Variation of Dielectric constant as a function of frequency
for Polyaniline – magnesium stanate composites
4. CONCLUSION
Polyaniline composites with different weight percentages of Magnesium stanate (MgSnO3) in
PANI were synthesized by chemical oxidative polymerization of monomer aniline. The results of
Dielectric constant show a strong dependence on the weight percent of Magnesium stagnate
(MgSnO3) in polyaniline.
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