ORCID
- Li, Long-yuan: 0000-0002-5982-0965
Abstract
This paper reported the effect of high temperature on the electro-mechanical behavior of carbon nanotube (CNT) reinforced epoxy composites. CNT/epoxy composites were fabricated by dispersing CNTs in the epoxy matrix using a solution casting method. Electrical conductivity measurements obtained for the CNT/epoxy composites indicated a steadily increasing directly proportional relationship with CNT concentration with a percolation threshold at 0.25 wt %, reaching a maximum of up to 0.01 S/m at 2.00 wt % CNTs. The electro-mechanical behavior of CNT/epoxy composites were investigated at a room temperature under the static and cyclic compressive loadings, resulting that the change in resistance of CNT/epoxy composites was reduced as increasing CNT concentration with good repeatability. This is due to well-networked CNTs conducting pathways created within the solid epoxy matrix observed by scanning electron microscopy. Temperature significantly affects the electro-mechanical behavior of CNT/epoxy composites. In particular, the electro-mechanical behavior of CNT/epoxy composites below the glass transition temperature showed the similar trend with those at room temperature, whereas the electro-mechanical behavior of CNT/epoxy composites above the glass transition temperature showed an opposite change in resistance with poor repeatability due to unstable CNT network in epoxy matrix.
DOI
10.3390/ma13020259
Publication Date
2020-01-07
Publication Title
Materials
Volume
13
Issue
2
ISSN
1996-1944
Embargo Period
2023-12-06
Organisational Unit
School of Engineering, Computing and Mathematics
Recommended Citation
Jang, S. H., & Li, L. (2020) 'Self-Sensing Carbon Nanotube Composites Exposed to Glass Transition Temperature', Materials, 13(2). Available at: https://doi.org/10.3390/ma13020259
