Analysis of DC Electrical Conductivity Models of Carbon Nanotube-Polymer Composites with Potential Application to Nanometric Electronic Devices

Vargas-Bernal, Rafael; Herrera-Pérez, Gabriel; Calixto-Olalde, Ma. Elena; Tecpoyotl-Torres, M.

doi:10.1155/2013/179538

Cited by 39 publications

(22 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thermodynamic models are based on the assumption that the process of forming chain structures considered on the basis of non‐equilibrium thermodynamics. The growth of conductivity on the interval of the critical concentration of percolation threshold is considered as a phase transformation in which particles move in peculiarly phase.…”

Section: Introductionmentioning

confidence: 99%

A mathematical model for predicting conductivity of polymer composites with a forced assembly network obtained bySCFNAmethod

Kormakov

Huang

et al. 2018

Polymer Composites

View full text Add to dashboard Cite

The Spatial Confining Forced Network Assembly, SCFNA, is a promising method for the preparation of high performance electrical conductive polymer composites, CPCs, by constructing a forced assembly conductive network in the polymer matrix. Because the present mathematical models for predicting electrical conductivities of CPCs were derived based on the free assembly of a conductive network, they were not suitable for predicting the electrical conductivities of the CPCs by SCFNA. A mathematical model for predicting the electrical conductivities of CPCs prepared by SCFNA was proposed in this article by introducing a compression ratio based on experimental data of the CPCs of PP/CF fabricated by SCFNA. The proposed model showed a good agreement with the experimental data of electrical conductivities prepared by SCFNA method. POLYM. COMPOS., 40:1819–1827, 2019. © 2018 Society of Plastics Engineers

show abstract

Section: Introductionmentioning

confidence: 99%

A mathematical model for predicting conductivity of polymer composites with a forced assembly network obtained bySCFNAmethod

Kormakov

Huang

et al. 2018

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…The above electrical conductivity results were compared with the theoretical values obtained by Kirkpatrick's model given by the following [25,26]: Advanced Composite Materials 415…”

Section: Resultsmentioning

confidence: 99%

Isotropic conductivities in chopped carbon fiber composites using expanded polypropylene

Roh

Kim

Lee

2014

Advanced Composite Materials

View full text Add to dashboard Cite

The aims of this study were to fabricate lightweight composites having isotropic electrical and thermal conductivities. The composites consist of expanded polypropylene (EPP) and chopped carbon fibers. They were randomly mixed together and fusion-bonded using steam at a high temperature with a high saturation vapor pressure. The quasi-isotropic electrical conductivities and isotropic thermal conductivities of the composites were achieved by the secondary expansion of the EPP. The densities, electrical and thermal conductivities of the composites with volume fractions of carbon fibers ranging from 4.2 to 8.5% were in the ranges of 0.2-0.3 g/cm 3 , 1.1-105.8 × 10 −4 S/cm, and 0.51-0.86 W/mK, respectively. The thermal conductivities of the composites were shown to increase monotonically with increasing volume fractions of carbon fibers, which is in agreement with the theoretical values using the series model. IntroductionLightweight and multifunctional materials are of interest in many industrial fields. [1][2][3][4][5][6][7] Electrical and thermal conductivities can be useful for applications such as the heat sink or electromagnetic wave shielding. Multifunctional materials can be made by mixing two or more materials, or by structural inducement.[1,6-14] To obtain isotropic properties, powder type fillers, for example, carbon black, carbon nanotube, and graphene have been used. The fillers of powder form are easy to realize isotropic properties. However, using fillers has a disadvantage which is the difficulty in filler dispersion in the matrix. Rod-shape fillers may result in better electrical and thermal conductivities than the powder-type fillers. However, it may result in anisotropic properties after the process because the rod-shaped filler with a high aspect ratio will inevitably have orientation depending on the direction of the mold flow or orientation biased towards the in-plane direction due to the shape of the filler even in the absence of mold flow. Consequently, electrical or thermal conductivities of the composite between the in-plane and the out-of-plane directions may become quite different. [10][11][12][13][14][15] In order to enhance the conductivities in the out-of-plane direction and thus to realize isotropic conductivities, expanded polypropylene (EPP) and carbon fibers were used in this study.

show abstract

“…When the concentration reaches the critical percolating threshold, the conductivity exhibits a sharp increase, attaining a value almost constant which characterizes the conducting charges behavior. The conductivity versus concentration can be expressed theoretically by the following relation :

σ = σ_{o} {true(ϕ_{f} - ϕ_{p} true)}^{t} for ϕ_{f} > ϕ_{p}

…”

Section: Percolation and Interphase Theoriesmentioning

confidence: 99%

“…This is not true when the environment contrasts significantly . The generalized effective medium model (GEM) developed by McLachlan is a direct combination of the effective medium theories with percolation theory, and was used with different approximations, in the study of composite systems . The obtained results indicate that the GEM gives a good agreement with experimental data but the problem is that the physical parameters are not universal and depend on the composite materials.…”

Section: Introductionmentioning

confidence: 99%

Prediction of filler/matrix interphase effects on AC and DC electrical properties of carbon reinforced polymer composites

et al. 2017

View full text Add to dashboard Cite

This study predicts the effect of the conducting filler/ insulating matrix interphase on the electrical properties of two series of percolated systems, differing from the type of carbon black particles mixed in an aminecured epoxy matrix, diglycidylic ether of bisphenol F. To take into account the interactions between the conducting filler and the matrix, as well as filler-filler overlapping, we introduce three parameters, characteristic of the interphase zone, such as concentration, conductivity and volume, on the generalized effective medium (GEM) model for DC and AC electrical conductivities. These interphase parameters, characterizing the boundary of the shaded zone between the macromolecular chain and the conducting particles, depend on the filler type and concentration. One output of GEM-modified model is that it provides a mean to estimate the volume, concentration and intrinsic conductivity of the interphase in a composite by fitting the experimental data over a broad range of frequency.

show abstract

Analysis of DC Electrical Conductivity Models of Carbon Nanotube-Polymer Composites with Potential Application to Nanometric Electronic Devices

Cited by 39 publications

References 15 publications

A mathematical model for predicting conductivity of polymer composites with a forced assembly network obtained bySCFNAmethod

A mathematical model for predicting conductivity of polymer composites with a forced assembly network obtained bySCFNAmethod

Isotropic conductivities in chopped carbon fiber composites using expanded polypropylene

Prediction of filler/matrix interphase effects on AC and DC electrical properties of carbon reinforced polymer composites

Contact Info

Product

Resources

About