Yusof, Yusliza and Moosavi, Seyedehmaryam and Johan, Mohd Rafie and Badruddin, Irfan Anjum and Abdul Wahab, Yasmin and Hamizi, Nor Aliya and Ab Rahman, Marlinda and Kamangar, Sarfaraz and Khan, T. M. Yunus (2021) Electromagnetic characterization of a multiwalled carbon nanotubes-silver nanoparticles-reinforced polyvinyl alcohol hybrid nanocomposite in x-band frequency. ACS Omega, 6 (6). pp. 4184-4191. ISSN 2470-1343, DOI https://doi.org/10.1021/acsomega.0c04864.
Full text not available from this repository.Abstract
This study presents the electromagnetic (EM) characterization of a multiwalled carbon nanotubes (MVVCNT)-silver nanoparticles (AgNP)-reinforced poly(vinyl alcohol) (PVA) hybrid nanocomposite fabricated via the solution mixing technique. Primarily, the structure and morphological properties of the PVA/MWCNT-AgNP hybrid nanocomposite are confirmed by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The complex permittivity (epsilon*) and permeability (mu*), as well as the electromagnetic scattering parameters are measured using a PNA network analyzer equipped with X-band waveguide. The results showed an enhanced permittivity (epsilon' approximate to 25) value of the hybrid nanocomposite in the frequency range of 8-12 GHz. However, the permeability decreased to almost zero (mu' approximate to 0.4) since the inclusion of AgNP with an average particle size of 40 nm is not susceptible to magnetization and causes higher magnetic losses (tan delta(mu) ) than dielectric losses (tan delta(epsilon)). Remarkably, the hybrid nanocomposite reduced transmission of electromagnetic (EM) wave by nearly 60% in comparison to PVA/MWCNT. This is attributed to the enhanced absorption and reflection at the nanotubes, and metal-dielectric interfaces have induced multiple internal reflections owing to the porous structure of the nanocomposite. The prospect of the PVA/MWCNT-AgNP hybrid nanocomposite is favorable as a thin absorbing material for EM shielding applications.
| Item Type: | Article |
|---|---|
| Funders: | King Khalid University [R.G.P 2/74/41], Universiti Malaya [NANOCAT RU2020] |
| Uncontrolled Keywords: | Electromagnetic; Multiwalled carbon nanotubes; Nanocomposite |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 09 Jun 2022 08:17 |
| Last Modified: | 09 Jun 2022 08:17 |
| URI: | http://eprints.um.edu.my/id/eprint/34299 |
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