volume | PIER Journals

Abstract

A material sample of Camphour Sulphonic Acid doped Polyaniline (PANI-CSA) is contemplated towards its conceivable use as a microwave shield. Shielding towards electromagnetic interferences (EMI) is measured over various frequency bands by the waveguide method. Plane wave electromagnetic theory is used to generalize the overall reflection and transmission coefficients of the polymer. EMI shielding of the polymer, in the form of Shielding Efficiency (SE), is analyzed over the microwave frequency range from 2 to 18 GHz, demonstrating the potential value of the polymer as an electromagnetic interference (EMI) shield for commercial purposes. The shielding film is fabricated using standard procedure with CSA as the dopant and m-cresol as the solvent. The shielding effectiveness as high as 45 dB for the sample of PANI doped with CSA is observed.

1. Shirakawa, B. H., E. J. Louis, A. G. Macdiarmid, C. K. Chiang, and A. J. Heeger, "Synthesis of electrically conducting organic polymers: Halogen derivatives of polyacetylene, (CH) x," J. Chem. Soc., Chem. Commun., 578-580, 1977.
doi:10.1039/c39770000578 Google Scholar

2. Roth, S. and W. Graupner, "Conductive polymers: Evaluation of industrial applications," Synth. Met., Vol. 57, No. 1, 3623-3631, 1993.
doi:10.1016/0379-6779(93)90487-H Google Scholar

3. Lee, C. Y., H. G. Song, K. S. Jang, E. J. Oh, A. J. Epstein, and J. Joo, "Electromagnetic interference shielding efficiency of polyaniline mixtures and multilayer films," Synth. Met., Vol. 102, No. 1-3, 1346-1349, 1999.
doi:10.1016/S0379-6779(98)00234-3 Google Scholar

4. Luo, X. and D. D. L. Chung, "Electromagnetic interference shielding using continuous carbon-fiber carbon-matrix and polymer-matrix composites," Composites: Part B, Vol. 30, 227-231, 1999.
doi:10.1016/S1359-8368(98)00065-1 Google Scholar

5. Jayasree, P. V. Y., V. S. S. N. S. Baba, B. Prabhakar Rao, and P. Lakshman, "Analysis of shielding effectiveness of single, double and laminated shields for oblique incidence of EM waves," Progress In Electromagnetics Research B, Vol. 22, 187-202, 2010.
doi:10.2528/PIERB10051305 Google Scholar

6. Colaneri, N. F. and L.W. Shacklette, "EMI shielding measurements of conductive polymer blends," IEEE Transactions on Instrumentation and Measurement, Vol. 41, No. 2, 1992.
doi:10.1109/19.137363 Google Scholar

7. Joo, J. and A. J. Epstein, "Electromagnetic radiation shielding by intrinsically conducting polymers," Appl. Phys. Lett., Vol. 65, No. 18, 2278, 1994.
doi:10.1063/1.112717 Google Scholar

8. Makela, T., S. Pienimaa, T. Taka, S. Jussilaa, and H. Isotaloa, "Thin polyaniline films in EMI shielding," Synthetic Metals, Vol. 85, 1335-1336, 1997.
doi:10.1016/S0379-6779(97)80259-7 Google Scholar

9. Shui, X. and D. D. L. Chung, "Submicron Nickel filaments made by electroplating carbon filaments as a new filter material for Electromagnetic interference materials," J. Electron. Mater., Vol. 24, 107-113, 1995.
doi:10.1007/BF02659630 Google Scholar

10. Lin, L. and D. D. L. Chung, "Electrical and mechanical properties of electrically conductive polyethersulfone composites," Composites, Vol. 25, 215, 1994. Google Scholar

11. Ott, H. W., Noise Reduction Techniques in Electronic Systems, 2nd Ed., John Wiley & Sons, 1988.

12. Oh, K. W., D. J. Kim, and S. H. Kim, "Adhesion improvement of electroless copper plated layer on PET film-effect of pretreatment conditions," Polymer (Korea), Vol. 25, 302-310, 2001. Google Scholar

13. Saini, P., V. Choudhary, K. N. Sood, and S. K. Dhawan, "Electromagnetic interference shielding behavior of polyaniline/graphite composites prepared by in situ emulsion pathway," J. Appl. Polym. Sci., Vol. 113, 3146-3155, 2009.
doi:10.1002/app.30183 Google Scholar

14. Saini, P., V. Choudhary, and S. K. Dhawan, "Improved microwave absorption and electrostatic charge dissipation efficiencies of conducting polymer grafted fabrics prepared via in situ polymerization," Polym. Adv. Technol., Vol. 23, 343-349, 2012.
doi:10.1002/pat.1873 Google Scholar

15. Trivedi, D. C., Handbook of Organic Conductive Molecules and Polymers, Vol. 2, John Wiley & Sons Ltd., 1997.

16. Saini, P., R. Jalan, and S. K. Dhawan, "Synthesis and characterization of processable polyaniline doped with novel dopant NaSIPA," J. Appl. Polym. Sci., Vol. 108, 1437, 2008.
doi:10.1002/app.27827 Google Scholar

17. Kohlman, R. S., J. Joo, and A. J. Epstein, Conducting Polymers: Electrical Conductivity, AIP Series in Polymers and Complex Materials, Physical Properties of Polymers Handbook, edited by J. E. Mark, American Institute of Physics, Woodbury, NY, 1996.

18. Rmili, H., J.-L. Miane, T. E. Olinga, and H. Zangar, "Microwave conductivity measurements of high conductive polyaniline films," Int. J. Polym. Anal. Charact., Vol. 9, 77-96, 2004.
doi:10.1080/10236660490890493 Google Scholar

19. Mazeikiene, R. and A. Malinauskas, "Electrochemical preparation and study of novel self-doped polyanilines," Mater. Chem. Phys., Vol. 83, 184-192, 2004.
doi:10.1016/j.matchemphys.2003.09.022 Google Scholar

20. Ikkala, O. T., L.-O. Pietila, L. Ahjopalo, H. Österholm, and P. J. Passiniemi, "On the molecular recognition and associations between electrically conducting polyaniline and solvents," J. Chem. Phys., Vol. 103, 9855, 1995.
doi:10.1063/1.469952 Google Scholar

21. Lee, K. H., B. J. Park, D. H. Song, I. J. Chin, and H. J. Choi, "The role of acidic m-cresol in polyaniline doped by camphorsulfonic acid," Polymer, Vol. 50, 4372-4377, 2009.
doi:10.1016/j.polymer.2009.07.009 Google Scholar

22. Hong, Y. K., C. Y. Lee, C. K. Jeong, D. E. Lee, K. Kim, and J. Joo, "Method and apparatus to measure electromagnetic interference shielding efficiency and its shielding characteristics in broadband frequency ranges," Rev. Sci. Instrum., Vol. 74, 1098-1102, 2003.
doi:10.1063/1.1532540 Google Scholar

23. Joo, J., C. Y. Lee, H. G. Song, J.W. Kim, K. S. Jang, E. J. Oh, and A. J. Epstein, "Enhancement of electromagnetic interference shielding efficiency of polyaniline through mixture and chemical doping," Mol. Cryst. Liq. Cryst. Sci. Technol. Sect. A. Mol. Cryst. Liq. Cryst., Vol. 316, 367-370, 1998.
doi:10.1080/10587259808044529 Google Scholar

24. Song, Y., H. Wang, and Y. Zheng, "Electric and electromagnetic shielding properties of highly conducting polyaniline films," International Symposium on Electromagnetic Compatibility, 582, IEEE, 2002.
doi:10.1109/ELMAGC.2002.1177499 Google Scholar

25. Joo, J. and C. Y. Lee, "High frequency electromagnetic interference shielding response of mixtures and multilayer films based on conducting polymers," J. Appl. Phys., Vol. 88, 513, 2000.
doi:10.1063/1.373688 Google Scholar

26. Wojkiewicz, J., J. Wojkiewicz, S. Fauveaux, and J. Miane, "Dielectric behavior and shielding properties of Polyaniline composites," IEEE 7th International Conference on Solid Dielectrics, 46-49, 2001. Google Scholar

27. Wessling, B., "Dispersion as the link between basic research and commercial applications of conductive polymers (polyaniline)," Synth. Met., Vol. 93, 143-154, 1998.
doi:10.1016/S0379-6779(98)00017-4 Google Scholar

28. Kumar, K. K. S., S. Geetha, and D. C. Trivedi, "Freestanding conducting polyaniline film for the control of electromagnetic radiations," Current Applied Physics, Vol. 5, 603-608, 2005.
doi:10.1016/j.cap.2004.08.004 Google Scholar

29. Schelkunoff, S. A., Electromagnetic Waves, Van Nostrand, 1945.

30. Chen, Y., Y. Li, M. Yip, and N. Tai, "Electromagnetic interference shielding efficiency of polyaniline composites filled with graphene decorated with metallic nanoparticles," Compos. Sci. Technol., Vol. 80, 80-86, 2013.
doi:10.1016/j.compscitech.2013.02.024 Google Scholar

31. Saini, P., V. Choudhary, B. P. Singh, R. B. Mathur, and S. K. Dhawan, "Enhanced microwave absorption behavior of polyaniline-CNT/polystyrene blend in 12.4-18.0 GHz range," Synth. Met., Vol. 161, 1522-1526, 2011.
doi:10.1016/j.synthmet.2011.04.033 Google Scholar

32. Morari, C., I. Balan, J. Pintea, E. Chitanu, and I. Iordache, "Electrical conductivity and electromagnetic shielding effectiveness of Silicon rubber filled with ferrite and graphite powders," Progress In Electromagnetics Research M, Vol. 21, 93-104, 2011.
doi:10.2528/PIERM11080406 Google Scholar

33. Lee, C. Y., D. E. Lee, C. K. Jeong, Y. K. Hong, J. H. Shim, J. Joo, M. S. Kim, J. Y. Lee, S. H. Jeong, S. W. Byun, D. S. Zang, and H. G. Yang, "Electromagnetic interference shielding by using conductive polypyrrole and metal compound coated on fabrics," Polym. Adv. Technol., Vol. 13, 577-583, 2002.
doi:10.1002/pat.227 Google Scholar

34. Benhamou, S. M., M. Hamouni, and S. Khaldi, "Theoretical approach of electromagnetic shielding of multilayer conductive sheets," Progress In Electromagnetics Research M, Vol. 41, 167-175, 2015.
doi:10.2528/PIERM15020101 Google Scholar

35. Hong, Y. K., C. Y. Lee, C. K. Jeong, D. E. Lee, K. Kim, and J. Joo, "Method and apparatus to measure electromagnetic interference shielding efficiency and its shielding characteristics in broadband frequency ranges," Rev. Sci. Instrum., Vol. 74, No. 2, 1098-1102, 2003.
doi:10.1063/1.1532540 Google Scholar

36. Park, S.-H. and P. T. Theilmann, "Enhanced electromagnetic interference shielding through the use of functionalized carbon-nanotube-reactive polymer composites," IEEE Transactions on Nanotechnology, Vol. 9, No. 4, July 2010. Google Scholar

37. Lin, M. S. and C. H. Chen, "Plane-wave shielding characteristics of anisotropic laminated composites," IEEE Trans. Electromagn. Compat., Vol. 35, No. 1, 21-27, 1993.
doi:10.1109/15.249392 Google Scholar

38. Joo, J., H. G. Song, Y. C. Chung, and J. S. Baeck, "The effects of dopant and solvent on charge transport of doped polyanilines," Journal of the Korean Physical Society, Vol. 30, No. 2, 230-236, 1997. Google Scholar

39. Honey, J., S. Biju Kumar, K. T. Mathew, and J. Rani, "Effect of drying conditions on microwave conductivity of polyaniline," Journal of Applied Polymer Science, Vol. 83, 2008-2012, 2002. Google Scholar

40. Joshi, A., A. Bajaj, R. Singh, A. Anand, P. S. Alegaonkar, and S. Datar, "Processing of graphene nanoribbon based hybrid composite for electromagnetic shielding," Composites: Part B, Vol. 69, 472-477, 2015.
doi:10.1016/j.compositesb.2014.09.014 Google Scholar

41. Salimbeygi, G., K. Nasouri, A. M. Shoushtari, R. Malek, and F. Mazaheri, "Microwave absorption properties of polyaniline/poly (vinyl alcohol)/multi-walled carbon nanotube composites in thin film and nanofiber layer structures," Macromolecular Research, Vol. 23, No. 8, 741-748, 2015.
doi:10.1007/s13233-015-3102-5 Google Scholar

42. Hoang, N. H., J. Wojkiewicz, J. Miane, and R. S. Biscarro, "Lightweight electromagnetic shields using optimized polyaniline composites in the microwave band," Polym. Adv. Technol., Vol. 18, 257-262, 2007.
doi:10.1002/pat.829 Google Scholar

43. El Kamchi, N., B. Belaabed, J.-L. Wojkiewicz, S. Lamouri, and T. Lasri, "Hybrid polyaniline/nanomagnetic particles composites: High performance materials for EMI shielding," J. Appl. Polym. Sci., 4426-4432, 2013.
doi:10.1002/app.38036 Google Scholar

44. Niu, Y., "Preparation of polyaniline/polyacrylate composites and their application for electromagnetic interference shielding," Polymer Composites, 2006. Google Scholar

45. Fauveaux, S. and J. Miane, Broadband Electromagnetic Shields Using Polyaniline Composites, Vol. 23, 617-627, 2003.

46. Geetha, S., K. K. S. Kumar, C. R. K. Rao, M. Vijayan, and D. C. Trivedi, EMI Shielding: Methods and Materials - A Review, Vol. 112, No. 1, 2073-2086, 2009.

Dr. Sreekala P. Sasikumar

Mrs. Vadakkekalathil Libi Mol

Dr. Dibin Mary George

Dr. Arimpoorpallan Lindo

Dr. Neeraj Kavalparambil Pushkaran

Dr. Honey John

Dr. Chandroth K. Aanandan