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      Electromagnetic interference shielding mechanisms of CNT/polymer composites

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      Carbon
      Elsevier BV

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          Electromagnetic interference shielding effectiveness of carbon materials

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            Novel carbon nanotube-polystyrene foam composites for electromagnetic interference shielding.

            A novel carbon nanotube-polystyrene foam composite has been fabricated successfully. The electromagnetic interference (EMI) shielding effectiveness measurements indicated that such foam composites can be used as very effective, lightweight shielding materials. The correlation between the shielding effectiveness and electrical conductivity and the EMI shielding mechanism of such foam composites are also discussed.
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              Electromagnetic interference (EMI) shielding of single-walled carbon nanotube epoxy composites.

              Single-walled carbon nanotube (SWNT)-polymer composites have been fabricated to evaluate the electromagnetic interference (EMI) shielding effectiveness (SE) of SWNTs. Our results indicate that SWNTs can be used as effective lightweight EMI shielding materials. Composites with greater than 20 dB shielding efficiency were obtained easily. EMI SE was tested in the frequency range of 10 MHz to 1.5 GHz, and the highest EMI shielding efficiency (SE) was obtained for 15 wt % SWNT, reaching 49 dB at 10 MHz and exhibiting 15-20 dB in the 500 MHz to 1.5 GHz range. The EMI SE was found to correlate with the dc conductivity, and this frequency range is found to be dominated by reflection. The effects of SWNT wall defects and aspect ratio on the EMI SE were also studied.
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                Author and article information

                Journal
                Carbon
                Carbon
                Elsevier BV
                00086223
                June 2009
                June 2009
                : 47
                : 7
                : 1738-1746
                Article
                10.1016/j.carbon.2009.02.030
                233f2fb0-f41f-4b3e-b418-5429f4fbd8c3
                © 2009

                http://www.elsevier.com/tdm/userlicense/1.0/

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