Excellent electromagnetic interference shielding effectiveness of chemically reduced graphitic oxide paper at 101 GHz*

Saini, Parveen; Kaushik, Sachin; Sharma, Rahul; Chakravarty, Disha; Raj, Rishi; Sharma, Jyotirmay

doi:10.1140/epjb/e2016-60624-7

Cited by 8 publications

(1 citation statement)

References 47 publications

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“…The 5 wt% NC with a higher total EMI SE than 7.5 and 10 wt% NCs can be attributed to better network formation of VGCNF in the PVDF matrix. EMI results coincide with previous research when using other carbonaceous filler materials using various processing methods ranging from VGCNFs, [ 3 ] carbon black, [ 70 ] graphite, [ 71 ] graphene, [ 66 ] MWCNT, [ 72 ] and CNTs [ 13 ] to name a few. Table 3 presents some relevant EMI SE studies obtained using different types of fillers.…”

Section: Resultssupporting

confidence: 87%

Electromagnetic interference shielding effectiveness of compression molded carbon nanofiber‐reinforced polyvinylidene difluoride film

et al. 2022

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In this study, vapor grown carbon nanofiber (VGCNF) reinforced polyvinylidene difluoride (PVDF) composites were developed. Composites were fabricated by high shear mixing using a Banbury type mixer. The material was then subjected to compression molding resulting in films with an average thickness of 0.82 mm. The developed films were subjected to physico‐thermal, and electrical characterization including analysis of the shielding effectiveness (SE) of electromagnetic interference (EMI). Morphological analysis was conducted by scanning electron microscopy and characterization complemented with Fourier transform infrared spectroscopic and X‐ray diffraction analyses. The thermal properties were studied by differential scanning calorimetry and thermogravimetric analysis, which revealed the influence of carbon nanofibers on thermal stability and phase transitions. The electrical conductivity for in‐plane and through‐plane was gradually enhanced by increasing the concentration of VGCF loading; a percolation threshold was initiated at 5 wt% loadings. In plane and through plane resistivity decreased from 1011 Ω‐cm to 103 Ω‐cm and 102 Ω‐cm, respectively. An in‐depth EMI SE study was conducted depicting the influence of VGCNFs on skin depth, EMI power coefficients for reflection, absorption and transmission, and EMI SE for reflection, absorption, and total. The total SE of the developed nanocomposite films was observed to range between 6.6–16.4 dB in a frequency range of 30 kHz to 1.5 GHz. This study presents the processing‐structure–property relationships for lightweight and flexible NC films with enhanced electrical conductivity.

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