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Advances in Materials Science and Engineering
Volume 2015, Article ID 132509, 7 pages
Research Article

Reduction of Electromagnetic Interference Using ZnO-PCL Nanocomposites at Microwave Frequency

1Department of Physics, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
2Department of Chemistry, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
3Institute of Mathematical Research (INSPEM), Universiti Putra Malaysia (UPM), 43400 Serdang, Malaysia

Received 9 March 2015; Revised 21 May 2015; Accepted 26 May 2015

Academic Editor: Markku Leskela

Copyright © 2015 Abubakar Yakubu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In industrial equipment and home appliance applications, the electromagnetic compatibility compliance directive (ECCD) demands that electromagnetic interference side effects be eliminated or marginally minimized. The equipment must not disturb radio and telecommunication as well as other appliances. Additionally the ECCD also governs the immunity of such equipment to interference and seeks to ensure that this equipment is not disturbed by radio emissions when used as intended. Many types of absorbing materials are commercially available. However, many are expensive and not environmentally friendly. It is in the light of the above that we studied the electromagnetic absorption properties of ZnO-PCL nanocomposites prepared from cheap and abundant resources which are environmentally friendly (zinc and polycaprolactone). The test was carried out using a microstrip, open ended coaxial probe, and vector network analyzer. Amongst other findings, result showed that the ZnO-PCL nanocomposite has the capability of attenuating microwave frequency up to −18.2 dB due to their very high specific surface areas attributed to the nanofillers at 12 GHz.