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Effect of oxyfluorination on electromagnetic interference shielding of polyaniline-coated multi-walled carbon nanotubes

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Abstract

Highly conducting polyaniline (PANi)-coated multi-walled carbon nanotubes (MWCNTs) were prepared by in situ polymerization method for electromagnetic interference shielding. The thickness of the PANi coatings was controlled by the oxyfluorination treatment on the multi-walled carbon nanotubes and analyzed with both SEM and TEM. The oxyfluorination with higher oxygen content produced more hydrophilic functional groups on the surface of multi-walled carbon nanotubes. The functional groups led to the well distribution and coating of PANi on the multi-walled carbon nanotubes resulting in the higher interfacial affinity between them. The uniform coating of PANi on MWCNTs by controlling the oxyfluorination conditions also played a crucial role in increasing the electrical conductivity of nanocomposites. The improved interfacial affinity resulted in the higher electromagnetic interference (EMI) SE of 47.03 dB based on the synergistic combination of the conductive components. The EMI shielding mechanism of PANi on MWCNTs suggested that EMI was mainly shielded by adsorption to avoid secondary EMI.

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Acknowledgement

This study was financially supported by a research fund of Chungnam National University in 2010.

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Authors and Affiliations

  1. Department of Fine Chemical Engineering and Applied Chemistry, BK21-E2M, Chungnam National University, Daejeon, 305-764, Republic of Korea

    Jumi Yun, Ji Sun Im, Hyung-Il Kim & Young-Seak Lee

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  1. Jumi Yun
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  2. Ji Sun Im
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  3. Hyung-Il Kim
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  4. Young-Seak Lee
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Correspondence to Hyung-Il Kim.

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Yun, J., Im, J.S., Kim, HI. et al. Effect of oxyfluorination on electromagnetic interference shielding of polyaniline-coated multi-walled carbon nanotubes. Colloid Polym Sci 289, 1749–1755 (2011). https://doi.org/10.1007/s00396-011-2496-7

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  • DOI: https://doi.org/10.1007/s00396-011-2496-7

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