Influence of lithium potassium zirconate nanoparticles on the electrical properties and structural characteristics of poly(vinyl alcohol) films |
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Authors: | HN Chandrakala B Ramaraj Shivakumaraiah Siddaramaiah |
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Institution: | 1. Department of Chemistry, Siddaganga Institute of Technology, Tumkur-572 103, India;2. Central Institute of Plastics Engineering and Technology (CIPET), Ahmedabad-382445, India;3. Department of Polymer Science and Technology, Sri Jayachamarajendra College of Engineering, Mysore - 570 006, India |
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Abstract: | We investigated the influence of lithium potassium zirconate (LiKZrO3) nanoparticles on the electrical properties and structural characteristics of poly(vinyl alcohol) (PVA) films. PVA/LiKZrO3 nanocomposite films were prepared by casting of aqueous solutions with varying LiKZrO3 content (0.5, 1.0, and 2.0 wt.%). The dielectric constant (ε′), dielectric loss (ε″), AC conductivity (σac), dielectric loss tangent (tan δ), and electric modulus (M′ and M″) of the nanocomposite films were measured over a range of frequencies at ambient temperature. The results show increases in σac and M′ with frequency, whereas ε′, ε″, and tan δ decreased with increasing frequency. The films were also characterized using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and X-ray diffraction (XRD) techniques. DSC and XRD revealed the nature of LiKZrO3 nanoparticle interaction with the PVA matrix. TGA analysis revealed an increase in thermal stability of the nanocomposites with increasing nanoparticle concentration. Scanning electron microscopy confirmed uniform dispersion of LiKZrO3 nanoparticles in the PVA matrix. |
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Keywords: | A: Polymers C: X-Ray diffraction C: Electron microscopy D: Electrical properties D: Optical properties |
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