Stochastic percolation model for the effect of nanotube agglomeration on the conductivity and piezoresistivity of hybrid nanocomposites

Gbaguidi, Audrey; Namilae, Sirish; Kim, Daewon

doi:10.1016/j.commatsci.2019.04.045

Cited by 28 publications

(23 citation statements)

References 40 publications

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“…In TPU/MWCNT composites, as the MWCNT content increased from 0.3 to 0.5 vol%, the conductivity increased from 1.01 × 10 −4 to 1.77 × 10 −3 S/cm. Many studies have been performed to examine the effect of agglomeration and morphology of conductive filler in a composite [74][75][76]. Gbaguidi et al [75] showed the effect of the morphology and the CNT density within the agglomerates to be of great importance.…”

Section: Electrical Conductivitymentioning

confidence: 99%

“…Many studies have been performed to examine the effect of agglomeration and morphology of conductive filler in a composite [74][75][76]. Gbaguidi et al [75] showed the effect of the morphology and the CNT density within the agglomerates to be of great importance. Larger agglomerates have shown to be detrimental to the electrical conductivity of the composites, while smaller bundles result in composites with higher conductivity.…”

Section: Electrical Conductivitymentioning

confidence: 99%

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Thermoplastic Polyurethane/Lead Zirconate Titanate/Carbon Nanotube Composites with Very High Dielectric Permittivity and Low Dielectric Loss

2020

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Ternary composites of flexible thermoplastic polyurethane (TPU), lead zirconate titanate (PZT), and multiwalled carbon nanotubes (MWCNTs) with very high dielectric permittivity (εr) and low dielectric loss (tan δ) are reported. To assess the evolution of dielectric properties with the interactions between conductive and dielectric fillers, composites were designed with a range of content for PZT (0–30 vol%) and MWCNT (0–1 vol%). The microstructure was composed of PZT-rich and segregated MWCNT-rich regions, which could effectively prevent the formation of macroscopic MWCNT conductive networks and thus reduce the high ohmic loss. Therefore, εr increased by a maximum of tenfold, reaching up to 166 by the addition of up to 1 vol% MWCNT to TPU/PZT. More importantly, tan δ remained relatively unchanged at 0.06–0.08, a similar range to that of pure TPU. εr/tan δ ratio reached 2870 at TPU/30 vol% PZT/0.5 vol% MWCNT, exceeding most of the reported values. This work demonstrates the potential of three-phase polymer/conductive filler/dielectric filler composites for efficient charge storage applications.

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Section: Electrical Conductivitymentioning

confidence: 99%

Section: Electrical Conductivitymentioning

confidence: 99%

Thermoplastic Polyurethane/Lead Zirconate Titanate/Carbon Nanotube Composites with Very High Dielectric Permittivity and Low Dielectric Loss

2020

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“…Increasing the insulating layer thickness from 0.35 to 0.75 nm substantially increases Rtunneling by four orders of magnitude at low voltages (Eq. [4][5][6][7][8][9][10][11]. As seen in Fig.…”

Section: Effect Of Different Parameters On the Electrical Behavior Of...mentioning

confidence: 88%

“…Several investigations took advantage of numerical simulations to predict the bulk electrical properties and better understand the underlying mechanism of electrical conduction in CNT/polymer composites [7][8][9][10][11][12]. In general, three types of resistances are defined in such systems: 1) the intrinsic resistance of conducting fillers, 2) the direct contact resistance between fillers, and 3) the tunneling resistance of adjacent fillers [8].…”

Section: Introductionmentioning

confidence: 99%

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A computational approach to evaluate the nonlinear and noisy DC electrical response in carbon nanotube/polymer nanocomposites near the percolation threshold

Sahraei

Ayati

Rodrigue

et al. 2020

Computational Materials Science

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Effect of carbon black silanization on isothermal curing kinetics of epoxy nanocomposites

Soltani

Razinobakht

Asmatulu

2020

J of Applied Polymer Sci

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The present study was carried out to determine the effect of carbon black (CB) nanofiller silanization and loading on isothermal curing kinetics of epoxy nanocomposites. The epoxy resin specimens incorporated with 2, 4, and 8 wt% pristine CB and silanized CB were cured at isothermal temperatures of 43, 60, and 104°C. Differential scanning calorimetry was used to characterize the curing kinetics, Fourier transform infrared spectroscopy was employed to confirm silanization of CB nanofillers, and scanning electron microscopy was utilized to study the morphology of nanocomposite specimens. It was also observed that the silanization did not change the curing kinetics of CB nanocomposites significantly as compared to the neat epoxy resin. However, the curing reactions of the pristine CB nanocomposites were slower than the neat epoxy resin marked by an average 10 and 4% decrease in the final degree of cure for the nanocomposite specimens cured at 43 and 60°C, respectively. The morphological studies revealed that the silanized CB particles exhibited a more stable and homogeneous dispersion in the epoxy resin than the pristine CB particles. Potential applications for the fabricated nanocomposites include sensors, actuators, and conductive coatings for electrostatic dissipation control in plastic parts.

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Stochastic percolation model for the effect of nanotube agglomeration on the conductivity and piezoresistivity of hybrid nanocomposites

Cited by 28 publications

References 40 publications

Thermoplastic Polyurethane/Lead Zirconate Titanate/Carbon Nanotube Composites with Very High Dielectric Permittivity and Low Dielectric Loss

Thermoplastic Polyurethane/Lead Zirconate Titanate/Carbon Nanotube Composites with Very High Dielectric Permittivity and Low Dielectric Loss

A computational approach to evaluate the nonlinear and noisy DC electrical response in carbon nanotube/polymer nanocomposites near the percolation threshold

Effect of carbon black silanization on isothermal curing kinetics of epoxy nanocomposites

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