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Electrified single‐walled carbon nanotube/epoxy nanocomposite via vacuum shock technique: Effect of alignment on electrical conductivity and electromagnetic interference shielding
Author(s) -
Hashemi Seyyed Alireza,
Mousavi Seyyed Mojtaba,
Arjmand Mohammad,
Yan Ning,
Sundararaj Uttandaraman
Publication year - 2018
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24632
Subject(s) - nanocomposite , materials science , carbon nanotube , composite material , epoxy , raman spectroscopy , electrical resistivity and conductivity , electromagnetic shielding , electrical conductor , conductivity , electrical engineering , optics , chemistry , physics , engineering
Electrified and non‐electrified epoxy‐based nanocomposites holding highly and randomly aligned single‐walled carbon nanotube (SWCNT), respectively, were made by vacuum shock technique, where a DC electric field was used to align SWCNT. The alignment of SWCNTs in the electrified nanocomposites was verified via optical microscopy, SEM analysis, and Raman spectroscopy. Electrical characterization revealed that alignment of SWCNTs led to a significant improvement in electrical conductivity and electromagnetic interference shielding of the fabricated nanocomposites. For instance, the electrical conductivity of the electrified nanocomposites at 0.25 wt% and 0.60 wt% was 2.5 × 10 −8 and 5.1 × 10 −4 S·m −1 , while the conductivity of non‐electrified nanocomposites was 1.1 × 10 −11 and 5.6 × 10 −5 S·m −1 , respectively. With 3.0 mm thickness and 0.60 wt% SWCNT loading, the electrified and non‐electrified nanocomposites showed shielding effectiveness of 12.8 dB and 9.1 dB, respectively. These results revealed that electrification of SWCNT in epoxy‐based nanocomposites improved the level of conductive network formation, thereby enhancing electrical properties of the nanocomposites. POLYM. COMPOS., 39:E1139–E1148, 2018. © 2017 Society of Plastics Engineers