Effect of Barium Hexaferrites and Thermally Reduced Graphene Oxide on EMI Shielding Properties in Polymer Composites
- PDF / 2,310,163 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 57 Downloads / 247 Views
ORIGINAL PAPER
Effect of Barium Hexaferrites and Thermally Reduced Graphene Oxide on EMI Shielding Properties in Polymer Composites Khadija Zubair 1 & M. Fayzan Shakir 1
&
Ayesha Afzal 1 & Z. A. Rehan 1 & Yasir Nawab 1
Received: 8 July 2020 / Accepted: 2 September 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Barium hexaferrites (BaFe) and thermally reduced graphene oxide (TRGO) were successfully prepared by co-precipitation and improved hummer’s method, respectively. Nanocomposite films based on the thermoplastic polyurethane (TPU) matrix with different compositions of TRGO and BaFe were prepared by a solution casting method with a thickness of 0.25 mm. Electromagnetic interference (EMI) shielding is the key application area of these nanocomposites in the microwave frequency range of 0.1–20GHz and near infrared (NIR) wavelength range of 700–2500 nm. A maximum of 3.5*10−5 S/cm AC conductivity and 4.8*10−6 S/cm DC conductivity was achieved. The dielectric constant and dielectric loss also enhanced 2–3 times with respect to the pure TPU matrix. Less than 0.5% transmission in the NIR region and −40 dB shielding were observed in the microwave region. The highest shielding of −61 dB was achieved at frequency 12.5GHz. Keywords Nanocomposites . EMI shielding . RGO . Barium ferrites . TPU
1 Introduction The ever-increasing demand for electrical and electronic devices with highly integrated circuits is causing pollution such as electromagnetic interference (EMI). Therefore, EMI has become a major problem in the modern era of technology. Moreover, it is not only affecting the electrical devices but also proven as equally harmful to human health. The extensive use of electronics and electrical devices like computers, radio, mobile phones, and even advanced navigation has caused EMI issues [1]. A solution to eliminate the EMI pollution is to shield the electronics connected with strategic systems like a nuclear reactor, control system, transformer, communication system, and aircraft without creating any harmful effect on nearby devices, human health [2, 3]. EMI shielding is achieved by either absorption or reflection of electromagnetic
* M. Fayzan Shakir [email protected] * Ayesha Afzal [email protected] 1
Department of Polymer Engineering, National Textile University, Faisalabad, Pakistan
radiation. Two important technical requirements for highperformance EMI shielding is flexibility and being lightweight for various applications [4]. The different forms of carbon -ike carbon nanotubes, carbon black, carbon fibers, expanded graphite, flexible graphite, graphene, and reduced graphene oxide (RGO) have been widely used for EMI shielding because composites based on carbon are low cost and provide easy synthesis and processing. Moreover, magnetic and dielectric materials like electrically conductive polymer composites have been reported as well [2, 5–14]. Graphene is being widely used in many potential applications such as batteries [15], polymer nanocomposites [16], senso
Data Loading...
