Electrical, mechanical, and electromagnetic interference shielding properties of poly(ether-ketone)-MWCNT nanocomposites
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Electrical, mechanical, and electromagnetic interference shielding properties of poly(ether-ketone)MWCNT nanocomposites M. G. Kulthe1, R. K. Goyal2,* 1 2
, and S. P. Butee1
Department of Metallurgy and Materials Science, College of Engineering Pune, Shivaji Nagar, Pune, Maharashtra, India Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, India
Received: 15 April 2020
ABSTRACT
Accepted: 26 August 2020
In this work, the effect of untreated multi-walled carbon nanotubes (MWCNT) on electrical properties, microhardness, and the electromagnetic interference shielding effectiveness (EMI-SE) of poly(ether-ketone) (PEK)-based nanocomposites were investigated. The MWCNT was varied from 0 to 8 wt% using planetary ball milling followed by hot pressing. The field emission scanning electron microscopy revealed good dispersion of MWCNTs in the PEK matrix and interface between the MWCNT and the PEK matrix is also good. The DC electrical conductivities and the dielectric constants of the PEK nanocomposites were increased approximately fourteen- and three orders of magnitude, respectively, compared to neat PEK. The Vickers microhardness of the nanocomposites increased * 46% compared to neat PEK. The EMI-SE of the nanocomposites was investigated using a vector network analyzer in both X-band (8.2–12.4 GHz) and Ku-band (12.4–18 GHz). A remarkable improvement in the electrical conductivity and the dielectric constant was obtained, which resulted in EMI-SE of * [ 52 dB in both bands.
Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction Electromagnetic interference (EMI) becomes a serious concern because of excessive usage of electronic devices and rapid development of technology. The EMI is the electromagnetic (EM) waves originated from natural sources or electronic instruments which degrade the performances of other electronic equipments/devices and thus, electronic circuitry might be affected by EMI. Moreover, issues of EMI are
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https://doi.org/10.1007/s10854-020-04359-7
attracting attention with the increasing use of the electromagnetic spectrum and the more sophisticated and complex electronic devices [1–3]. To avoid these major issues of EMI in electronic as well as in biological systems, many researchers have developed different materials for shielding of these electromagnetic waves [3–13]. EMI shielding is a process which involves the reflection and/or absorption of EM radiations by a material, which ultimately behaves as a shield and restricts the penetration of the radiations
J Mater Sci: Mater Electron
into the surrounding electronic devices. The use of metal and its composites for EMI shielding applications has been restricted because of its shortcomings such as heavy weight, corrosion susceptibility, rigid and processing difficulties. In contrast, conducting polymer matrix composites are more advantageous because of light weight, flexibility, high corr
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