Fabrication and evaluation of thin layer PVDF composites using MWCNT reinforcement: Mechanical, electrical and enhanced electromagnetic interference shielding properties

Rao, B. V. Bhaskara; Kale, Nikita; Kothavale, B. S.; Kale, S. N.

Abstract

Radar X-band electromagnetic interference shielding (EMS) is one of the prime requirements for any air vehicle coating; with limitations on the balance between strength and thickness of the EMS material. Nanocomposite of multiwalled-carbon-nanotubes (MWCNT) has been homogeneously integrated (0-9 wt%) with polymer, poly (vinylidene fluoride, PVDF) to yield 300 micron film. The PVDF + 9 wt% MWCNT sample of density 1.41 g/cm(3) show specific shielding effectiveness (SSE) of 17.7 dB/(g/cm(3)) (99.6% EMS), with maintained hardness and improved conductivity. With multilayer stacking (900 microns) of these films of density 1.37 g/cm(3), the sample showed increase in SSE to 23.3 dB/(g/cm(3)) (99.93% EMS). Uniform dispersion of MWCNTs in the PVDF matrix gives rise to increased conductivity in the sample beyond 5 wt% MWCNT reinforcement. The results are correlated to the hardness, reflection loss, absorption loss, percolation threshold, permittivity and the conductivity data. An extremely thin film with maximum EMS property is hence proposed. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Más información

Título según WOS: ID WOS:000379041400034 Not found in local WOS DB
Título de la Revista: AIP ADVANCES
Volumen: 6
Número: 6
Editorial: AIP Publishing
Fecha de publicación: 2016
DOI:

10.1063/1.4953810

Notas: ISI