Effect of pre-axial tensile tension, temperature, and hysteresis loss of natural rubber doped MWCNTs on the electrical properties for sensors applications

Abstract

In view of its large application, one used natural rubber (NR). The effects of MWCNTs contents on electrical properties as well as the effect of both pre extension and mechanical hysteresis on the electrical properties of these composites were discussed. At low MWCNTs contents (≤6 phr), έ, σac, and σdc showed to have slight changes. Meanwhile, contents (≥9 phr) have significant increase as a result of its interfacial polarization. That is, the composite became conductive. Higher positive electrical conductivity coefficient (PTCC) intensity was detected for the 3phr sample. The effect of the electric field on the mechanical creep characteristics and its corresponding parameters were investigated. Conventional elastic modulus was found to increase with both MWCNTs concentration and the applied stress in all samples about six times its original value. Current creep curves were constructed and maximum piezoresistivity was found for sample 3phr with a negative effect on piezoresistivity, which can be employed as a pressure or force sensor. The parameters deduced from hysteresis loop such as the strain coefficient of conductivity, damage parameter, strain energy density, inelastic strain, elastic strain, and mismatch parameter are strongly dependent on both the MWCNTs concentration and the applied mechanical stress. The damage parameter increased to about 20 times with increasing the concentration, while the decreases with increasing number of hysteresis cycles. The activation energy decreased with the pre-axial tension, while no effect of electrical conductivity.

Glycerol-treated polypropylene/carbon black nanocomposites: Analysis of electrical, rheological, thermal and mechanical properties

“…Electrically conductive polymer composites have received great attention owing to their promising applications in many fields, [1][2][3] including antistatic materials, 4 electromagnetic interference shielding, 5,6 self-regulated heating materials, 7 and sensors. 8 Binary conductive polymer systems consisting of conducting fillers such as carbon black (CB), 9,10 graphite, 11,12 multi-walled carbon nanotubes (MWCNTs), [13][14][15] and carbon fibers 16,17 in a polymer matrix can create polymer composites that are tough and flexible with appropriate electrical conductivity based on their applications.…”

Effect of X-ray exposure on nano-mechanical properties of multi-walled carbon nanotube incorporated silicone polymer nanocomposites: An AFM-based study

“…31 Hence, MWCNT was chosen as the filler material in the present study. Variations in electrical properties of MWCNT loaded silicone elastomer and natural rubber nanocomposites have been investigated by Saji et al 32 and Aljuraide et al, 33 respectively. MWCNT loaded thermoplastic polymer nanocomposites have been reported to exhibit superior electromagnetic interference shielding.…”