TY - JOUR
T1 - Effect of Multiwalled Carbon Nanotubes on the Electromagnetic Interference Shielding Properties of Polyimide/Carbonyl Iron Composites
AU - Wang, Hongyu
AU - Zhu, Dongmei
AU - Zhou, Wancheng
AU - Luo, Fa
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - Electromagnetic interference (EMI) shielding materials with polyimide resin as matrix and hybrid fillers (carbonyl iron and multiwalled carbon nanotubes (MWCNTs)) as fillers were prepared, and their electromagnetic and EMI properties were investigated in the frequency range of 8.2-12.4 GHz. The microstructures of the composites show a uniform dispersion of the hybrid fillers. The effective complex permittivity and the EMI effectiveness of the composites increased with increase in the MWCNTs content. When the content of MWCNTs was 4 wt %, the effective complex permittivity and EMI effectiveness could reach 66.5 + 45.5 and 24 dB. The average values of the surface reflection (SER) and the internal absorption (SEA) increased 0.7 and 2.1 dB for 4 wt % MWCNTs composites, respectively, after the composites were heat treatment at 300 °C. Those results indicated that the polyimide matrix composites could be used as effective EMI shielding materials.
AB - Electromagnetic interference (EMI) shielding materials with polyimide resin as matrix and hybrid fillers (carbonyl iron and multiwalled carbon nanotubes (MWCNTs)) as fillers were prepared, and their electromagnetic and EMI properties were investigated in the frequency range of 8.2-12.4 GHz. The microstructures of the composites show a uniform dispersion of the hybrid fillers. The effective complex permittivity and the EMI effectiveness of the composites increased with increase in the MWCNTs content. When the content of MWCNTs was 4 wt %, the effective complex permittivity and EMI effectiveness could reach 66.5 + 45.5 and 24 dB. The average values of the surface reflection (SER) and the internal absorption (SEA) increased 0.7 and 2.1 dB for 4 wt % MWCNTs composites, respectively, after the composites were heat treatment at 300 °C. Those results indicated that the polyimide matrix composites could be used as effective EMI shielding materials.
UR - http://www.scopus.com/inward/record.url?scp=84934779596&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.5b01182
DO - 10.1021/acs.iecr.5b01182
M3 - 文章
AN - SCOPUS:84934779596
SN - 0888-5885
VL - 54
SP - 6589
EP - 6595
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 25
ER -