TY - JOUR
T1 - Modeling the roles of carbon nanotubes and interphase dimensions in the conductivity of nanocomposites
AU - Zare, Yasser
AU - Yop Rhee, Kyong
AU - Park, Soo Jin
N1 - Publisher Copyright:
© 2019 The Authors
PY - 2019/12/1
Y1 - 2019/12/1
N2 - The influences of interphase regions on the percolation threshold and electrical conductivity of nanocomposites polymer/carbon nanotubes (CNT) nanocomposites (PCNT) have been ignored in previous articles, although the interphase layer around CNT can encourage the conductivity. In this paper, the dimensions of CNT and surrounding interphase suggest the percolation threshold of CNT in PCNT. The comparisons between predictions and experimental measurements in several samples confirm the suggested equation. Moreover, the effective volume fraction of CNT and the fraction of networked CNT in the presence of interphase zones are expressed. Finally, a model is developed to investigate the roles of CNT and interphase dimensions as well as percolation threshold and CNT conductivity in the conductivity of PCNT. Thin CNT and thick interphase increase the effective volume fraction of nanoparticles in PCNT, whereas the CNT length is ineffective. A thick interphase and a high concentration of thin and long CNT grow the percentage of networked CNT and the conductivity of PCNT. The conductivity directly correlates to the CNT conductivity, while the smallest percolation threshold causes the highest conductivity. Additionally, a high waviness worsens the percolation threshold, the network size and the CNT conductivity resulting in a poor conductivity in nanocomposites.
AB - The influences of interphase regions on the percolation threshold and electrical conductivity of nanocomposites polymer/carbon nanotubes (CNT) nanocomposites (PCNT) have been ignored in previous articles, although the interphase layer around CNT can encourage the conductivity. In this paper, the dimensions of CNT and surrounding interphase suggest the percolation threshold of CNT in PCNT. The comparisons between predictions and experimental measurements in several samples confirm the suggested equation. Moreover, the effective volume fraction of CNT and the fraction of networked CNT in the presence of interphase zones are expressed. Finally, a model is developed to investigate the roles of CNT and interphase dimensions as well as percolation threshold and CNT conductivity in the conductivity of PCNT. Thin CNT and thick interphase increase the effective volume fraction of nanoparticles in PCNT, whereas the CNT length is ineffective. A thick interphase and a high concentration of thin and long CNT grow the percentage of networked CNT and the conductivity of PCNT. The conductivity directly correlates to the CNT conductivity, while the smallest percolation threshold causes the highest conductivity. Additionally, a high waviness worsens the percolation threshold, the network size and the CNT conductivity resulting in a poor conductivity in nanocomposites.
KW - Electrical conductivity
KW - Interphase
KW - Percolation threshold
KW - Polymer/CNT nanocomposites
UR - https://www.scopus.com/pages/publications/85071230168
U2 - 10.1016/j.rinp.2019.102562
DO - 10.1016/j.rinp.2019.102562
M3 - Article
AN - SCOPUS:85071230168
SN - 2211-3797
VL - 15
JO - Results in Physics
JF - Results in Physics
M1 - 102562
ER -