Properties of EMNC and EMNSC for Insulation New Material as Apply to High Voltage Heavy Electric Machine

고압중전기기용 절연신소재 EMNC와 EMNSC의 특성연구

  • 박재준 (중부대학교 전기전자공학과)
  • Received : 2012.08.02
  • Accepted : 2012.09.21
  • Published : 2012.10.01


In order to develop an new electric insulation material for heavy electric equipments, epoxy/micro/nano composite (EMNC) was prepared by mixing micro-silica with nano layered silicate, where the nano layered silicate was synthesized by our electric field dispersion method, EMNSC was prepared by treating the EMNC with a silane coupling agent. Thermal properties such as glass transition temperature (Tg) and thermal expansion coefficient, and DMA characteristics were studied, and mechanicla properties such as tensile and flexural tests were performed. AC electrical insulation strength was also tested. All properties of EMNSC were modified by treating EMNC with silane coupling agent and it was confirmed that our new developed composites could be used in the heavy electric equipments.


  1. P. O. Henk, T. W. Kortsen and T. Kvarts, High Perform. Polym., 11, 281 (1999) [DOI: 10. 1088/0954-0083/11/3/304].
  2. M. Ehsani, Z. Farhadinejad, S. Moemen-bellah, S.M. Bagheralavi, M. M. S. Shrazi and H. Borsi, 26th Internal Power System Conference, Tehran, Iran, 11-E-CAM-2359 (2011).
  3. P. Bajaj, N. K. Jha and A. Kumar, J. Appl. Polym. Sci., 56, 1339(1995) [DOI: 10.1002/app.1995.070561015].
  4. Y. Xu, D. D. L. Chung and C. Mroz, Composites: Part A, 32, 1749 (2001) [DOI:http://].
  5. A. A. Wazzan, H. A. Al-Turaif and A. F. Abdelkader, Polymer-Plastics Technology and Engineering, 45, 1155 (2006) [DOI:10.1080/03602550600887285].
  6. R. Sarathi, R. K. Sahu and P. Rajeshkumar, Mater. Sci. Eng.: A, 445, 567 (2007) [DOI:10.1016/j.msea.2006. 09. 077].
  7. N. Hayakawa, H. Maeda, S. Chigusa and H. Okubo, Cryogenics, 40, 167 (2000) [DOI:10.1016/s0011-2275 (00) 00024-2].
  8. G. Iyer, R. S. Gorur, R. Richert, A. Krivda and L. E. Schmidt, IEEETrans. Dielectr. Electr. Insul., 18, 659 (2011) [DOI: 10.1109/TDEI.2011.5931050].
  9. D. A. Bolon,, IEEE Trans. Dielectr. Electr. Insul., 11, 10 (1995) [DOI: 10.1109/57.400759].
  10. J. J. Park, K. G. Yoon and J. Y. Lee, Trans. Electr. Electron. Mater. 12, 98 (2011) [DOI: 10.4313/TEEM.2011.12.3.98].
  11. J. J. Park, S. S. Kwon and J. Y. Lee, Trans. Electr. Electron. Mater. 12, 135 (2011) [DOI:].
  12. T. Imai, F. Sawa, T. Ozaki, T. Shimizu, R. Kido, M. Kozako, and T. Tanaka, IEEE Trans. Dielectr. Electr. Insul., 13, 445 (2006)[DOI:10.1109/TDEI.2006.1624291].
  13. C. Zou, J.C. Fothergill and S. W. Rowe, IEEE Trans. Dielectr. Electr. Insul., 15, 106 (2008) [DOI:10.1109/T-DEI.2008.4446741].
  14. J. Castellon, H. N. Nguyen, S. Agnel, A. Toureille, M. Fr?chette, S. Savoie, A. Krivda and L. E. Schmidt,, IEEE Trans. Dielectr.Electr. Insul., 18, 651 (2011) [DOI: 10.1109/TDEI.2011.5931049].
  15. T. Imai, F. Sawa, T. Ozaki, T. Shimizu, S. Kuge, M. Kozako,and Tanaka, IEEJ Trans. Fund. Mater., 126, 1136 (2006) [DOI:10.1541/ieejfms.126.1136].
  16. J. J. Park and J. Y. Lee, IEEE Trans. Dielectr. Electr. Insul. 17, 1516(2010) [DOI: 10.1109/TDEI. 2010.5595553].
  17. J. J. Park, C. H. Lee, J. Y. Lee and H. D. Kim, IEEE Trans. Dielectr.Electr. Insul. 18, 667 (2011) [DOI: 10.1109/TDEI.2011.5931051].
  18. R. Sarathi, R.K. Sahu, P. Rajeshkumar, "Understanding the thermal, mechanical and electrical properties of epoxy nanocomposites" Material Science and Engineering A 445-446 (2007) pp. 567-578
  19. Takahiro Imai,Fumio Sawa, Toshiyuki Nakano, Tamon Ozaki, Toshio Shimizu, Masahiro Kozako and Toshikatsu Tanaka, "Effects of Nano- and Micro-filler Mixture on Electrical Insulation Properties of Epoxy Based Composites", IEEE Transactions on Dielectrics and Electrical Insulation Vol. 13, No. 1; February 2006
  20. Farzana Hussain, Jihua Chen, Mehdi Hojjati, "Epoxy-silicate nanocomposites: Cure monitoring and characterization", Materials Science and Engineering A 445-446 (2007) 467-476
  21. L. E. Nielsen, Particulate-filled Materials ""Mechanical Properties of Polymers and Composites"", vol. 2, Marcel Dekker, New York, 1974, 379-452.
  22. T. N. Matheson, A. S. Vaughan, S. J. Sutton and A. Minigher, "Electrical Characteristics of Epoxy/ nanoclay Nanodielectric Systems", 2007 International Conference on Solid Dielectrics, Winchester, UK, July 8-13, 2007
  23. J. K. Nelson, J. C. Fothergill, "Internal charge behaviour of nanocomposites", Nanotechnology vol. 15(2004) pp. 586-595
  24. A. S. Vaughan, S. G. Swingler, Y. Zhang, "Polyethylene Nanodielectrics: The Influence of Nanoclays on Structure Formation and Dielectric Breakdown", IEEJ Trans. FM, vol. 126 no. 11
  25. Santanu Singha and M. Joy Thomas, "Dielectric Properties of Epoxy Nanocomposites", IEEE Transactions on Dielectrics and Electrical Insulation Vol. 15, No. 1; February 2008

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