Fabrication of Bio-Polymer Nanocomposite EMI Shields Based on Sugarcane Bagasse and PVA/PANI/MWCNT, and Evaluation of the Shielding Effectiveness in Relation to the Various Compositions
| Authors | M.B. Hasani1, T.N. Patel1, K. Inamdar1, P.V. Bhale2 |
| Affiliations |
1Department of Electronics Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India 2Department of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India |
| Е-mail | d21ec009@eced.svnit.ac.in |
| Issue | Volume 17, Year 2025, Number 4 |
| Dates | Received 20 April 2025; revised manuscript received 18 August 2025; published online 29 August 2025 |
| Citation | M.B. Hasani, T.N. Patel, et al., J. Nano- Electron. Phys. 17 No 4, 04013 (2025) |
| DOI | https://doi.org/10.21272/jnep.17(4).04013 |
| PACS Number(s) | 87.50.S – |
| Keywords | Bio char, Bio-polymer nanocomposites, Electromagnetic interference, Shielding effectiveness, S parameters. |
| Annotation |
In the present research, conductive polymer bio composite thin shields consisting of polyvinyl alcohol (PVA), poly aniline (PANI)-conductive polymer, multi-walled carbon nanotubes (MWCNT) and sugarcane bagasse (SB) biochar are fabricated and compared. The pyrolysis technique is employed for producing biochar. To develop several kinds of bio composite shields, PANI, MWCNT, and SB bio char were mixed with PVA using a magnetic stirrer. PVA and PANI compositions of 10g and 2g were fixed, respectively. Four shield samples (SB1, SB2, SB3, and SB4) were fabricated by altering the MWCNT and SB composition. Using the Van der Pauw approach, the conductivities of the shields were estimated to be 6.44, 21.88, 25.86, and 35.04 S/m, respectively. Shielding effectiveness (SE) and S-parameters were computed using the microwave test bench method in the X band at a frequency of 10 GHz. To determine SE and acquire S-parameters, simulations were run in the CST microwave studio simulator. Sample SB4 shield had the maximum SE of 40 dB (experimental) and 42 dB (simulated) at 1 mm thickness, subsequently, a comparison and explanation of the experimental and simulated data are shown. The combination of filler materials PANI and MWCNT is a novel choice which has increased the SE of the SB bio char. This is attributed to the higher conductivity and better aspect ratio of sugarcane bagasse bio char, which facilitates the formation of a conductive network on the shield's surface. Thus, the proposed novel combination of materials gives high SE for a very thin film. Utilizing abundant sugarcane bagasse waste for EMI shield fabrication not only reduces electromagnetic pollution but also contributes to mitigating environmental pollution. |
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