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CARBONLETT, vol. 24, no. 1, pp.41-46, 2017

DOI: http://dx.doi.org/I:10.5714/CL.2017.24.041

Flexural, electrical, thermal and electromagnetic interference shielding properties of xGnP and carbon nanotube filled epoxy hybrid nanocomposites

Young Sil Lee1, Yeon Ho Park2 and Kwan Han Yoon2,♠

Affiliation: 1Industry-Academic Cooperation Foundation, Kumoh National Institute of Technology, Gumi 39177, Korea
2Department of Chemical Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea

Abstract: The microstructure, flexural properties, electrical conductivity, thermal conductivity and electromagnetic interference (EMI) shielding effectiveness (SE) of epoxy composites filled with multi-walled carbon nanotubes (CNTs), exfoliated graphite nanoplatelets (xGnPs) and CNT-xGnP hybrid filler were investigated. The EMI SE of the CNT-xGnP hybrid composite was higher than 25 dB at 100 MHz while that of the xGnP based composite was almost zero. The flexural modulus of the CNT-xGnP based epoxy composite continuously increased to 3.32 GPa with combined filler content up to 10 wt% while that of the CNT based epoxy composites slightly decreased to 1.96 GPa at 4 wt% CNT, and dropped to 1.57 GPa at 5 wt% loading, which is lower than that of epoxy. The CNT and CNT-xGnP samples had the same EMI SE at the same surface resistivity, because samples with the same surface conductivity have the same amount of the charge carriers.

Keyword: multi-walled carbon nanotube, exfoliated graphite nanoplatelet, epoxy, nanocomposite, electromagnetic interference shielding