Journal
COMPOSITES PART B-ENGINEERING
Volume 58, Issue -, Pages 457-462Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.10.039
Keywords
Mechanical properties; Thermal properties; Electrical properties
Funding
- British Council [6050180]
- Queen Mary, University of London (UK)
- Universiti Sains Malaysia (USM) [8032017]
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Polydimethylsiloxane (PDMS) hybrid composites consisting of exfoliated graphite nanoplatelets (xGnPs) and multiwalled carbon nanotubes functionalized with hydroxyl groups (MWCNTs-OH) were fabricated, and the effects of the xGnP/MWCNT-OH ratio on the thermal, electrical, and mechanical properties of polydimethylsiloxane (PDMS) hybrid composites were investigated. With the total filler content fixed at 4 wt%, a hybrid composite consisting of 75% x GnP/25% MWCNT-OH showed the highest thermal conductivity (0.392 W/m K) and electrical conductivity (1.24 x 10(-3) S/m), which significantly exceeded the values shown by either of the respective single filler composites. The increased thermal and electrical conductivity found when both fillers are used in combination is attributed to the synergistic effect between the fillers that forms an interconnected hybrid network. In contrast, the various different combinations of the fillers only showed a modest effect on the mechanical behavior, thermal stability, and thermal expansion of the PDMS composite. (C) 2013 Elsevier Ltd. All rights reserved.
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