Structural and dielectric characterization of (PVP/PEO)/Al 2 O 3 nanocomposites for biodegradable nanodielectric applica
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ORIGINAL RESEARCH
Structural and dielectric characterization of (PVP/PEO)/Al2O3 nanocomposites for biodegradable nanodielectric applications Priyanka Dhatarwal 1 & R. J. Sengwa 1 Received: 19 May 2020 / Revised: 11 July 2020 / Accepted: 22 July 2020 # Springer Nature Switzerland AG 2020
Abstract Polymer host matrix and inorganic nanofiller comprising hybrid nanocomposites of integrated promising properties are the most appealing multifunctional materials for developing advanced flexible-type electrical and electronic devices and also a variety of daily life quality products. This research reports the structural parameters and dielectric properties of biodegradable poly(vinyl pyrrolidone)/poly(ethylene oxide) (PVP/PEO) blend matrix and alumina (Al2O3) nanoparticle–based polymer nanocomposite (PNC) films. Porous spherulitic morphology of the host PVP/PEO matrix, polymer-polymer interactions, and the structures of PEO crystallites are found largely influenced by the Al2O3 nanofiller, whereas the degree of crystallinity of the PNC films increases slightly. The dielectric permittivity of the PNC films over 20 Hz to 1 MHz frequency range confirmed some increase in dielectric polarization, but they exhibited anomalous behavior when the Al2O3 content increases in gradual steps from 1 to 5 wt%. In these hybrid materials, the interfacial polarization and dielectric relaxation predominantly contributed in the dielectric permittivity and electric modulus dispersion at the lower frequencies. The detailed analysis of dielectric properties authenticates that these nanocomposites could be used as prominent biodegradable nanodielectrics for polymer nanotechnology-based eco-friendly future-generation numerous types of flexible devices/products. Keywords Biodegradable nanodielectrics . PVP/PEO blend . Al2O3 nanofiller . Structural properties . Dielectric polarization
1 Introduction Besides the academic interest and fundamental applications of the polymer nanocomposite (PNC) materials, the hybrid inorganic-organic- and also organic-organic-type nanocomposites are now technologically recognized as promising properties and flexible-type multifunctional “nanodielectrics” which are ideal for advances in enormous modern electrical and organoelectronic devices [1–20]. The experimental results established that the preparation of PNC materials of desired properties for a particular area of technological interest is mainly governed by the polymer matrix and inorganic and/ or organic nanofiller properties, as well as the adopted methods of their preparation [1–4, 6–9, 12, 13]. For assessing * R. J. Sengwa [email protected]; [email protected] Priyanka Dhatarwal [email protected] 1
Dielectric Research Laboratory, Department of Physics, Jai Narain Vyas University, Jodhpur 342 005, India
the appropriateness of a PNC material as nanodielectric in the development of electronic and electrical devices, its detailed dielectric and electrical characterization is of prime interest [1–3, 7, 12, 13]. Recent reviews evidence that severa
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