Abstract
Conducting polyaniline (PAni)–antimony trioxide (Sb2O3) composites with different weight percentages (wt%) of Sb2O3 in PAni have been synthesized by in situ chemical oxidative polymerization. The composites were structurally and morphologically characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Measurements of electromagnetic interference (EMI) shielding, complex permittivity and microwave absorbing as well as reflecting properties of the composites were carried out in the frequency range of 8–18 GHz, encompassing the microwave X and Ku bands of practical relevance. All the computations are based on microwave scattering parameters measured by transmission line waveguide technique. It is observed that the presence of Sb2O3 in the PAni matrix affects the electromagnetic shielding and dielectric properties of the composites at microwave frequencies. The composites have shown better shielding effectiveness (SE) in both the X (SE in the range −18 to −21 dB) and Ku (−17.5 to −20.5 dB) bands. ε′ and ε′′ values of the PAni–Sb2O3 composites are in the range of 64–37 and 63–30, respectively, in the frequency range of 8–18 GHz. Dielectric measurements indicated the decrease in dielectric constant with the increase in wt% of Sb2O3. The results obtained for the reflection and absorption coefficients indicated that PAni–Sb2O3 composites exhibit better electromagnetic energy absorption throughout the X and Ku bands. The results indicated that PAni–Sb2O3 composites can be used as potential microwave absorption and shielding materials.
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Abbas SM, Dixit AK, Chatterjee R, Goel TC (2007) Complex permittivity, complex permeability and microwave absorption properties of ferrite-polymer composites. J Magn Magn Mater 309:20–24
Das NC, Yamazaki S, Hikosaka M, Chaki TK, Khastgir D, Chakraborty A (2005) Electrical conductivity and electromagnetic interference shielding effectiveness of polyaniline–ethylene vinyl acetate composites. Polym Int 54:256–259
Koul S, Chandra R, Dhawan SK (2000) Conducting polyaniline composite for ESD and EMI at 101 GHz. Polymer 41:9305–9310
Faisal M, Khasim S (2012) Polyaniline–stannous oxide composites: novel material for broadband EMI shielding. Adv Mater Res 488–489:557–561
Yavuz O, Rama MK, Aldissi M, Poddar P, Srikanth H (2005) Polypyrrole composites for shielding applications. Synth Met 151:211–217
Kim MS, Kim HK, Byun SW, Jeong SH, Hong YK, Joo JS, Song KT, Kim JK, Lee CJ, Lee JY (2002) PET fabric/polypyrrole composite with high electrical conductivity for EMI shielding. Synth Met 126:233–239
Niu Y (2008) Electromagnetic interference shielding with polyaniline nanofibers composite coatings. Polym Eng Sci 48:355–359
Mo Z, Zhang P, Zuo D, Sun Y, Chen H (2008) Synthesis and characterization of polyaniline nanorods/Ce(OH)3-PrO3/montmorillonite composites through reverse micelle template. Mater Res Bull 43:1664–1669
Dey A, De S, De A, De SK (2004) Characterization and dielectric properties of polyaniline–TiO2 nanocomposites. Nanotechnology 15:1277–1283
Bae WJ, Kim KH, Jo WH (2004) Exfoliated nanocomposite from polyaniline graft copolymer/clay. Macromolecules 37:9850–9854
Cox SD, Stucky GD (1991) Polymerization of methylacetylene in hydrogen zeolites. J Phys Chem 95:710–720
Khasim S, Raghavendra SC, Revanasiddappa M, Sajjan KC, Lakshmi M, Faisal M (2011) Synthesis, characterization and magnetic properties of polyaniline/γ-Fe2O3 composites. Bull Mater Sci 34:1557–1561
Genies EM, Boyle A, Lapkowski M, Tsintavis C (1990) Polyaniline: a historical survey. Synth Met 36:139–182
Chandrasekhar P (1999) Conducting polymers, fundamentals and applications: a practical approach, 1st edn. Kluwer Academic Publishers, London
Pud A, Ogurtsov N, Korzhenko A, Shapoval G (2003) Some aspects of preparation methods and properties of polyaniline blends and composites with organic polymers. Prog Polym Sci 28:1701–1753
Sahoo NK, Apparao KVSR (1996) Process-parameter optimization of Sb2O3 films in the ultraviolet and visible region for interferrometric application. Appl Phys A 63:195–202
Zhang Y, Li G, Zhang J, Zhang L (2004) Shape-controlled growth of one-dimensional Sb2O3 nanomaterials. Nanotechnology 15:762–765
Machappa T, Prasad MVNA (2009) AC conductivity and dielectric behavior of polyaniline–sodium metavanadate (PANI/NaVO3) composites. Physica B 404:4168–4172
Ravikiran YT, Lagare MT, Sairam M, Mallikarjun NN, Sreedhar B, Manohar S, Mac Diarmid AG, Aminabhavi TM (2006) Synthesis, characterization and low frequency AC conduction of polyaniline/niobium pentoxide composites. Synth Met 156:1139–1147
Durmus Z, Baykal A, Kavas H, Sozeri H (2011) Preparation and characterization of polyaniline (PANI)–Mn3O4 nanocomposite. Physica B 406:1114–1120
Phang SW, Tadokoro M, Watanabe J, Kuramoto N (2008) Microwave absorption behaviors of polyaniline nanocomposites containing TiO2 nanoparticles. Curr Appl Phys 8:391–394
Singh K, Ohlan A, Bakshi AK, Dhawan SK (2010) Synthesis of conducting ferromagnetic nanocomposites with improved microwave absorption properties. Mater Chem Phys 119:201–207
Micheli D, Apollo C, Pastore R, Marchetti M (2010) X-Band microwave characterization of carbon based nanocomposites material, absorption capability comparison and RAS design simulation. Compos Sci Technol 70:400–409
Nanni F, Travaglia P, Valentini M (2009) Effect of carbon nanofibers dispersion on the microwave absorbing properties of CNF/epoxy composites. Compos Sci Technol 69:485–490
Orman RG, Holland D (2007) Thermal phase transitions in antimony (III) oxides. J Solid State Chem 180:2587–2596
Sapurina I, Stejskal J (2008) The mechanism of the oxidative polymerization of aniline and the formation of supramolecular polyaniline structures. Polym Int 57:1295–1325
Gubbels F, Blacher S, Vanlathem E, Jerome R, Deltour R, Brouers F, Teyssie Ph (1995) Design of electrical composites: determining the role of the morphology on the electrical properties of carbon black filled polymer blends. Macromolecules 28:1559–1566
Li J, Ma PC, Chow WS, To CK, Tang BZ, Kim JK (2007) Correlations between percolation threshold, dispersion state, and aspect ratio of carbon nanotubes. Adv Funct Mater 17:3207–3215
Joo J, Lee CY (2000) High frequency electromagnetic interference shielding response of mixtures and multilayer films based on conducting polymers. J Appl Phys 88:513–518
Joo J, Epstein AJ (1994) Electromagnetic radiation shielding by intrinsically conducting polymers. Appl Phys Lett 65:2278–2280
Wu ZP, Li MM, Hu YY, Li YS, Wang ZX, Yin YH, Chen YS, Zhou X (2011) Electromagnetic interference shielding of carbon nanotube macrofilms. Scripta Mater 64:809–812
Lakshmi K, John H, Mathew KT, Joseph R, George KE (2009) Microwave absorption, reflection and EMI shielding of PU–PANI composite. Acta Mater 57:371–375
Dang ZM, Yuan JK, Zha JW, Zhou T, Li ST, Hu GH (2012) Fundamentals, processes and applications of high-permittivity polymer-matrix composites. Prog Mater Sci 57:660–723
Fenske K, Misra D (2000) Dielectric materials at microwave frequencies. Appl Microw Wirel 12:92–100
Gupta A, Choudhary V (2011) Electromagnetic interference shielding behavior of poly(trimethylene terephthalate)/multi-walled carbon nanotube composites. Compos Sci Technol 71:1563–1568
Jadhav SV, Puri V (2008) Microwave study of chemically synthesized conducting polyaniline on alumina. Synth Met 158:883–887
Nicolson AM, Ross GF (1970) Measurement of the intrinsic properties of materials by time domain techniques. IEEE Trans Instrum Meas 19:377–382
Weir WB (1974) Automatic measurement of complex dielectric constant and permeability at microwave frequencies. IEEE Proc 62:33–36
Yang CC, Gung YJ, Shih CC, Hung WC, Wu KH (2011) Synthesis, infrared and microwave absorbing properties of BaFe12O19 + BaTiO3)/polyaniline composite. J Magn Magn Mater 323:933–938
Raja V, Sharma AK, Narasimha VVR (2004) Impedance spectroscopy and dielectric analysis of PMMA–CO–P4VPNO polymer films. Mater Lett 58:3242–3247
Jianjun H, Yuping D, Jia Z, Hui J, Shunhua L, Weiping L (2011) γ-MnO2/polyaniline composites: preparation, characterization, and applications in microwave absorption. Physica B 406:1950–1955
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The Authors would like to thank the management of PES Institute of Technology-Bangalore South Campus for their support and encouragement towards carrying out this work.
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Faisal, M., Khasim, S. Polyaniline–antimony oxide composites for effective broadband EMI shielding. Iran Polym J 22, 473–480 (2013). https://doi.org/10.1007/s13726-013-0149-z
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DOI: https://doi.org/10.1007/s13726-013-0149-z