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Dielectric properties of epoxy composites with modified multiwalled carbon nanotubes

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Abstract

We report here a high dielectric percolative polymer nanocomposite, fabricated by a combination of triethylene-tetramine (TETA) modified multiwalled carbon nanotube (named as TETA-MWNT) within epoxy resin matrix. In this composite system, with various TETA-MWNT volume fractions, the dielectric constant (K) is well fitted by the scaling law of the percolation theory with the percolation threshold f c is 0.042 and the critical exponent p is 0.786. At 1,000 Hz of room temperature, the value of the dielectric constant is as high as 421 with the TETA-MWNT content of 4.14vol%, which is almost 60 times higher than that of epoxy resin. In contrast, a simple blend of pristine MWNT in epoxy composite shows evident lower dielectric constant and much higher loss with the same volume fraction.

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Acknowledgments

This research was supported by the Hi-tech Research and Development Program China under Contract No2002AA334130, the Aeronautical Science Foundation of China under Contract No. 2006ZF52060, and the Natural Science Foundation of Jiangsu Province (No. BK2006194).

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Authors and Affiliations

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, People’s Republic of China

    Fang Wang, Jing-Wen Wang, Shu-qin Li & Jun Xiao

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  1. Fang Wang
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  2. Jing-Wen Wang
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  3. Shu-qin Li
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  4. Jun Xiao
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Correspondence to Jing-Wen Wang.

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Wang, F., Wang, JW., Li, Sq. et al. Dielectric properties of epoxy composites with modified multiwalled carbon nanotubes. Polym. Bull. 63, 101–110 (2009). https://doi.org/10.1007/s00289-009-0064-9

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  • DOI: https://doi.org/10.1007/s00289-009-0064-9

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