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Effect of Nano-Ce-Doped TiO2 on AC Conductivity and DC Conductivity Modeling Studies of Poly (n-Butyl Methacrylate)

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Abstract

Among the unique properties of polymer nanocomposites, electrical conductivity deserves a prominent place due to their wide applications in conducting adhesive, electromagnetic shielding and sensors. The present work focuses on the effect of cerium-doped titanium dioxide (Ce-TiO2) nanoparticles on the conductivity studies of poly (n-butyl methacrylate), or PBMA, nanocomposites at different temperatures. The frequency-dependent alternating current (AC) electrical conductivity of PBMA/Ce-TiO2 nanocomposites has been found to increase with increase in temperature and the concentration of Ce-TiO2 nanoparticles. The activation energy calculated from the AC electrical conductivity has been found to decrease with frequency and increasing temperatures. The frequency exponent factor also showed a decrease with frequency, indicating the hopping conduction in the nanocomposites. The maximum AC conductivity has been observed for the composites with 7 wt.% sample. The direct current (DC) conductivity of PBMA/Ce-TiO2 composites was also enhanced with the addition of Ce-TiO2 nanoparticles. Experimental and theoretical investigations based on Scarisbrick, Bueche, McCullough and Mamunya modeling were undertaken to understand the observed DC conductivity differences induced by the addition of Ce-doped TiO2 nanoparticles to PBMA matrix. The experimental conductivity showed good agreement with the theoretical conductivity observed using the Mamunya model.

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Acknowledgements

The authors wish to thank Prof. P. P. Pradyumnan, Department of Physics, University of Calicut, for providing the necessary facilities in the department.

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  1. Department of Chemistry, University of Calicut, Calicut University P.O., Kerala, 673 635, India

    K. Suhailath & M. T. Ramesan

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  1. K. Suhailath
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  2. M. T. Ramesan
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Correspondence to M. T. Ramesan.

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Suhailath, K., Ramesan, M.T. Effect of Nano-Ce-Doped TiO2 on AC Conductivity and DC Conductivity Modeling Studies of Poly (n-Butyl Methacrylate). J. Electron. Mater. 47, 6484–6493 (2018). https://doi.org/10.1007/s11664-018-6556-3

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  • DOI: https://doi.org/10.1007/s11664-018-6556-3

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