Colossal dielectric permittivity of Nylon-6 matrix-based composites with nano-TiO 2 fillers
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Colossal dielectric permittivity of Nylon‑6 matrix‑based composites with nano‑TiO2 fillers Sunil Meti1 · Udaya K. Bhat1 · M. Rizwanur Rahman1 Received: 9 December 2019 / Accepted: 3 March 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Herein, the nanocomposite films of Nylon-6 with reinforced nano-TiO 2 were explored for their charge storage capacity. The high dielectric constant (ε) of TiO2, along with its compatibility with Nylon-6, formed the basis for the present study. TiO2 nanoparticles were synthesized initially using hydrothermal technique. The microscopic uniformity and anatase-phase purity of the TiO2 nanoparticles were confirmed with the help of morphological and structural investigations. The effect of weight fraction of T iO2 in Nylon-6 was investigated to understand the robustness of the fabricated nanocomposites. The composite films with 5, 10 and 20 wt% of T iO2 in Nylon-6 matrix were prepared, and their dielectric behavior was explored by fabricating capacitors with parallel plate architecture. The composite film with 20 wt% T iO2 showed the highest dielectric parameters. The nanocomposite films have the exceptional dielectric quality with ε ~ 124 and low dielectric loss of 0.51 at 1 kHz. The colossal dielectric nature along with minimum sophistication in the film fabrication process makes the present nanocomposite to be a potential candidate for the various electronic devices. Keywords Nylon-6 · TiO2 · Hydrothermal method · Spin coating · Impedance spectroscope
1 Introduction Most of the electronic devices consist of active and passive components. Among the passive components, resistors, capacitors, inductors and transformers play an important role. The capacitors are very important in the electronic devices due to their multiple functioning, such as storing, bypassing, decoupling, and timing. The ceramic capacitors showed high dielectric constant, but they have various disadvantages. Some of them are poor mechanical strength and brittleness. Due to the increase in the automation and electronic device applications, the polymer-ceramic composites with colossal dielectric constant are shown as the promising materials for capacitor applications [1–4]. By combining the advantages of polymer and ceramic materials, it is possible Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00339-020-3445-4) contains supplementary material, which is available to authorized users. * Udaya K. Bhat [email protected] 1
Department of Metallurgical and Materials Engineering, National Institute of Technology Karnataka, Surathkal 575025, India
to fabricate materials with higher dielectric constant. The dielectric permittivity of polymer is enhanced by dispersing high dielectric permittivity ceramic particles into the polymer matrix to form polymer-ceramics composites [5–9]. The polymer-ceramic (PC) composites dielectric materials have such advantages as flexibility, high dielectric strength, high breakdown strength and high ener
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