Electrical resistance-based strain sensing in carbon nanotube/polymer composites under tension: Analytical modeling and experiments

Strain-dependent electrical resistance of epoxy/MWCNT composite after hydrothermal aging

“…Although CNT/polymer composites have attracted considerable attention, most of the experimental treatments are usually limited to the investigation of intrinsic material properties with little attention to the environmental degradation. Numerous studies have been conducted on the electrical conductivity and piezoresistive effect of CNT/polymer composites and their potential for strain and damage sensing applications [14][15][16]. However, very few papers have been published on the electrical performance of these materials under the effect of environmental factors such as atmosphere humidity or water and temperature [17][18][19][20].…”

On the mechanism of piezoresistivity of carbon nanotube polymer composites

“…Unfortunately, none of these approaches can quantitatively model the nonlinear and asymmetric characteristics of piezoresistivity when subjected to tensile and compressive strains [14,[51][52][53]. The fundamental understanding of piezoresistive mechanisms in CNT-polymer composites remains unclear, largely due to the limited efforts allocated into the theoretical and numerical investigations of the piezoresistivity behavior of CNT-polymer composites.…”

Electromechanical response of polycarbonate-CNT/PZT laminates subjected to cyclic bending

“…According to the material densities, ρ N = 1.8 g/cm 3 for a MWNT (Xie et al, 2005) and ρ M = 1.2 g/cm 3 for the polycarbonate (supplier's data), the v N values for the polycarbonate-0.8, 1.0 and 2.5 wt% MWNT layers were calculated to be 0.5, 0.7 and 1.7 vol%, respectively. The Young's moduli E C and Poisson's ratios ν C of the polycarbonate-MWNT layers are shown in Table 2 (Kuronuma et al, 2012); where the subscript C refers to polycarbonate-CNT layer.…”

“…Sharma et al (2013) synthesised a PZT/poly-dimethylsiloxane-based flexible composite, and discussed the damping behaviour and structural loss factor. On the other hand, dispersing CNTs into polymeric materials can form electrically conductive composites (Wernik and Meguid, 2010;Takeda et al, 2011;Kuronuma et al, 2012); hence, CNT-based polymer layers or films are well suited for electronic components in multifunctional devices.…”