High-performance strain sensors based on functionalized graphene nanoplates for damage monitoring
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › Not applicable › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 32-38 |
Journal / Publication | Composites Science and Technology |
Volume | 123 |
State | Published - 8 Feb 2016 |
Link(s)
Abstract
A high-performance piezoresistive strain sensor can be used to monitor the deformation and damage in the structural composites. We developed the sensors with high sensitivity by structuring a 3D graphene network into an epoxy matrix. One-pot synthesis of amino-functionalized graphene nanoplates (f-GnP) was realized from graphite oxide and polyether amine, so that the dispersion of graphene in epoxy was well improved. The f-GnP/epoxy composite with lower percolation threshold, i.e. ~1.31 vol%, exhibited relatively high gauge factor of ~45 and Young's modulus of ~2.2 GPa. Importantly, the studied sensor with f-GnP network structure could help to detect the initiation and accumulation of damage in the structure materials under tensile loading. The normalized electrical resistance change (δR/Ro) of the composite sensor initially almost increased linearly, then shown nonlinear drift and irregular ladder-shaped growth with the appearance of irreversible damage and deformation. These results suggest that the graphene/epoxy piezoresistive sensors show promising applications for the damage monitoring of structural materials in the field of aerospace.
Research Area(s)
- Damage monitoring, Electrical properties, Mechanical properties, Nano composites, Polymer-matrix composites (PMCs)
Citation Format(s)
High-performance strain sensors based on functionalized graphene nanoplates for damage monitoring. / Zha, Jun-Wei; Zhang, Bo; Li, Robert K.Y.; Dang, Zhi-Min.
In: Composites Science and Technology, Vol. 123, 08.02.2016, p. 32-38.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › Not applicable › peer-review