Abstract
In the present paper, we report electrical conductivity and dielectric studies on the composites of conducting polyaniline (PANI) with crystalline semiconducting ZnS powder, wherein PANI has been taken as inclusion and ZnS crystallites as the host matrix. From the studies, it has been observed that the value of room temperature d.c. conductivity of the composites with volume fraction of PANI > 0.65 shows an unusual behaviour wherein, conductivity values of the composites exceed that of PANI itself with maximum value as high as 6 times that of PANI at the volume fraction of 0.85. A similar trend has also been observed for the real and imaginary parts of complex dielectric constant values of the composites. This unusual behaviour in the d.c. conductivity and dielectric properties has been attributed to the enhancement in the degree of crystallinity of PANI as a consequence of its interfacial interaction with ZnS matrix. The results of optical microscopy show coating of PANI all around the ZnS particles. The temperature dependent conductivity studies suggest the quasi one-dimensional VRH conduction in PANI as well as its composites with ZnS. FTIR and XRD studies have also been reported.
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References
Blaszkiewicz M, McLachlan D S and Newnham R 1992J. Polym. Eng. Sci. 32 421
Bober K N, Giles R H and Waldman J, Tailoring the microwave permittivity and permeability of composite materials; Internet site: http://stl.uml.edu/PubLib/Bober,%20Tailor%20Micro% 20Perm.pdf
Brosseau C, Queffelec P and Talbot P 2001J. Appl. Phys. 89 4532
Chen L F, Ong C K, Neo C P, Varadan V V and Varadan V K 2004Microwave electronics: Measurement and material characterization (England: John Wiley & Sons) p. 177
Dutta P, Biswas S, Ghosh M, De S K and Chatterjee S 2001Synth. Met. 122 455
Epstein A Jetal 1994Synth. Met. 65 149
Fizazi A, Moulton J, Pakbaz K, Rughooputh S D D, Smith P and Heeger A J 1990Phys. Rev. Lett. 64 2180
Gangopadhyay R, De A and Ghosh G 2001Synth. Met. 123 529
Harada I, Furukawa Y and Ueda F 1989Synth. Met. 29 303
Hedying P 1977Dielectric spectroscopy of polymers (Bristol: Helger) p. 28
Joo J, Long S M, Pouget J P, Oh E J, MacDiarmid A G and Epstein A J 1998Phys. Rev. B57 9567
Kaiser A B, Subramanium C K, Gilberd P W and Wessling B 1995Synth. Met. 69 197
Kaiser A B, Liu C J, Gilberd P W, Kemp N T, Wessling B, Partridge A C, Smith W T and Shapiro J C 1997Synth. Met. 84 699
Kryszewaski M 1991Synth. Met. 45 289
Kumar N, Vadera S R, Singh J, Das G, Negi S C, Aparna P and Tuli A 1996Def. Sci. J. 56 91
Lide D R and Frederikse H P R 1993Handbook of chemistry and physics (Boca Raton, Florida: CRC Press) pp 9–153
MacDiarmid A G and Epstein A J 1994Frontiers of polymers and advanced materials (New York: Plenum Press) p. 251
MacDiarmid A G and Epstein A J 1995Synth. Met. 69 85
Merrill W M, Diaz R E, LeRe M M, Squires M C and Alexopoulos N G 1999IEEE Trans. Antenna Propg. 47 142
Murugesan R and Subramanian E 2003Bull. Mater. Sci. 26 529
Suzuki Y, Heeger A J and Pincus P 1990Macromolecules 23 2180
Troung V T, Codd A R and Forsyth M 1994J. Mater. Sci. 29 4331
Tuncer E, Serdyuk Y V and Gubanski S M 2002IEEE Trans. Dielec. Electr. Insul. 9 809
Wessling B 1998Handbook of conducting polymers (New York: Marcel Dekker Inc. Press) p. 471
Wessling B 1999Synth. Met. 102 1396
Yang J, Hou J, Zhu W, Xu M and Wan M 1996Synth. Met. 80 283
Yoon C O, Reghu M, Moses D, Cao Y and Heeger A J 1995Synth. Met. 26 255
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Pant, H.C., Patra, M.K., Negi, S.C. et al. Studies on conductivity and dielectric properties of polyaniline-zinc sulphide composites. Bull Mater Sci 29, 379–384 (2006). https://doi.org/10.1007/BF02704139
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DOI: https://doi.org/10.1007/BF02704139