Abstract
In the present work, indigenous coal ash taken from Sharigh, Balochistan, Pakistan was used to prepare polymer electrolyte films with PEO/PMMA/LiClO4. Coal ash was first characterized by various techniques like Surface and Porosity Analysis, SEM/energy dispersive X-ray analysis (EDX), transmission electron microscopy, Fourier transform infrared (FTIR), and XRD. Chemical composition of ash was confirmed by EDX. Then, the utility of coal ash towards fabricating PEO/PMMA/LiClO4/coal ash composites was studied in order to explore its use as an additive for polymeric blend composites. The ash incorporation into the polymeric blend composites was studied by X-ray diffraction and UV/Visible spectroscopy, while ionic conductivity measurements were undertaken by Impedance spectroscopy. Room temperature conductivity of polymeric blend composites was found to increase sharply with ash content and reached maximum at 3.3 wt.% of ash. Both direct and indirect band gap energies of polymeric blend decreased with coal ash incorporation. The decrease was at peak at 3.3 wt.% of ash. Coal ash has found to improve the performance of polymeric blends.
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Acknowledgments
One of us (S.S) acknowledges the Higher Education Commission of Pakistan for providing funding for carrying out research in UK under their scheme IRSIP. We are also thankful to Dr. Richard Baker (Sr. lecturer ), School of Chemistry, University of St. Andrews, Scotland (UK) for providing technical assistance regarding HRTEM, SEM/EDX, and conductivity and Mrs. Sylvia Williamson of the same institute for providing facility of optical, surface, and porosity studies.
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Khan, M.S., Sultana, S., Raza, Z.A. et al. Electrical, structural, and optical characterization of coal ash–PEO/PMMA blend composites. Ionics 20, 353–362 (2014). https://doi.org/10.1007/s11581-013-0980-4
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DOI: https://doi.org/10.1007/s11581-013-0980-4