volume | PIER Journals

Abstract

Graphite receives tremendous attentions as filler for conducting composite due to its low cost and high electrical conductivities. In this work we use polyvinylidene fluoride (PVDF) as insulating matrix and graphite (Gr) as a filler to develop conducting composite films using solvent casting technique. The dielectric properties of the developed PVDF-Gr films were analysed for the frequency range of 100 kHz to 10 MHz. The morphology of the obtained films was investigated by scanning electron microscopy. The EMI shielding properties of the PVDF-Gr composite films were evaluated theoretically using ɛ′, tan δ, and σ in the desired radio frequency region. Mechanical strength of the films was tested by universal testing machine. Due to advantages such as light weight, flexibility, and low cost the developed film with the thickness of ~0.15 mm had very good potential to be used for fabricating electromagnetic compatible electronic devices.

1. Zhao, C., R. Zhao, S. Hamidinejad, and C. Park, "Flexible, ultrathin, and high-efficiency electromagnetic shielding properties of poly(vinylidene fluoride)/carbon composite films," ACS Appl. Mater. Interfaces, Vol. 9, No. 24, 20873-20884, Jun. 2017.
doi:10.1021/acsami.7b04935 Google Scholar

2. Rathi, V., V. Panwar, G. Anoop, M. Chaturvedi, K. Sharma, and B. Prasad, "Flexible, thin composite film to enhance the electromagnetic compatibility of biomedical electronic devices," IEEE Transactions on Electromagnetic Compatibility, Vol. 61, No. 4, 1033-1041, Aug. 2019.
doi:10.1109/TEMC.2018.2881267 Google Scholar

3. Li, J., H. Liu, J. Guo, Z. Hu, Z. Wang, B. Wang, L. Liu, Y. Huang, and Z. J. Guo, "Flexible, conductive, porous, fibrillar polymer-gold nanocomposites with enhanced electromagnetic interference shielding and mechanical properties," Mater. Chem. C, Vol. 5, No. 5, 1095-1105, 2017.
doi:10.1039/C6TC04780G Google Scholar

4. Chen, M., L. Zhang, S. Duan, S. Jing, H. Jiang, M. Luo, and C. Li, "Highly conductive and flexible polymer composites with improved mechanical and electromagnetic interference shielding performances," Nanoscale, Vol. 6, No. 7, 3796-3803, 2014.
doi:10.1039/C3NR06092F Google Scholar

5. Rathi, V. and V. Panwar, "Electromagnetic interference shielding analysis of conducting composites in near- and far-field region," IEEE Transactions on Electromagnetic Compatibility, Vol. 99, 1-7, Jan. 2018. Google Scholar

6. Gupta, T. K., B. P. Singh, V. N. Singh, S. Teotia, A. P. Singh, I. Elizabeth, S. R. Dhakate, S. Dhawan, and R. B. Mathur, "MnO2 decorated graphenenanoribbons with superior permittivity and excellent microwave shielding properties," Mater. Chem. A, Vol. 2, No. 12, 4256-4263, 2014.
doi:10.1039/c3ta14854h Google Scholar

7. Eswaraiah, V., V. Sankaranarayanan, and S. Ramaprabhu, "Functionalized graphene — PVDF foam composites for EMI shielding," Macromol. Mater. Eng., Vol. 296, 894-898, 2011.
doi:10.1002/mame.201100035 Google Scholar

8. Taka, T., "EMI shielding measurements on poly(3-octyl thiophene) blends," Synthetic Metals, Vol. 41, No. 3, 1177-1180, May 1991.
doi:10.1016/0379-6779(91)91582-U Google Scholar

9. Panwar, V., V. K. Sachdev, and R. M. Mehra, "Insulator conductor transition in low-density polyethylene-graphite composites," Eur. Polym. J., Vol. 43, No. 2, 573-585, Feb. 2007.
doi:10.1016/j.eurpolymj.2006.11.017 Google Scholar

10. Panwar, V., B. Kang, J. O. Park, S. Park, and R. M. Mehra, "Study of dielectric properties of styreneacrylonitrile graphite sheets composites in low and high frequency region," Eur. Polm. J., Vol. 45, No. 6, 1777-1784, Jun. 2009.
doi:10.1016/j.eurpolymj.2009.02.020 Google Scholar

11. Loya, S., "Analysis of shielding effectiveness in the electric field and magnetic field and plane wave for infinite sheet metals," IJEA, Vol. 6, No. 2, 31-41, 2016. Google Scholar

12. Panwar, V. and M. Mehra, "Analysis of electrical, dielectric, and electromagnetic interference shielding behavior of graphite filled high density polyethylene composites," Polym. Eng. Sci., Vol. 48, No. 11, 2178-2187, Sep. 2008.
doi:10.1002/pen.21163 Google Scholar

13. Chen, H. L., C. H. Su, S. P. Ju, H. Y. Chen, J. S. Lin, J. Y. Hsieh, P. Y. Yang, and C. Y. Lin, "Predicting mechanical properties of polyvinylidene fluoride/carbon nanotube composites by molecular simulation," Materials Research Express, Vol. 4, No. 11, 115025, Nov. 2017.
doi:10.1088/2053-1591/aa985e Google Scholar

Dr. Vikas Rathi

Dr. Varij Panwar

Dr. Brijesh Prasad