Polymer tunneling resistivity between adjacent carbon nanotubes (CNT) in polymer nanocomposites

Zare, Yasser; Rhee, Kyong Yop

doi:10.1016/j.jpcs.2020.109664

Cited by 6 publications

(3 citation statements)

References 51 publications

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“…Accordingly, the tunneling distance and resistivity inversely affect the conductivity. Certainly, the tunneling mechanism is controlled by the tunneling resistivity of polymer film and the separation distance between nanofibers 45 . So, the proposed model properly depicts the main roles of these factors in the conductivity.…”

Section: Resultsmentioning

confidence: 99%

“…It is well recognized that the tunneling can play an important role in the conduction of PCNF 42,43 . Many developed or new models for the resistances of tunneling zones were suggested to guess the tunnels properties, since the electrical effectiveness of tunnels is outstanding in nanocomposites 38,44,45 . Furthermore, interphase regions are formed due to the robust interfacial linkage between nanofiber and matrix as well as the surface area of nanoparticles in nanocomposites [46][47][48][49][50] .…”

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confidence: 99%

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Development of Kovacs model for electrical conductivity of carbon nanofiber–polymer systems

Arjmandi

Yeganeh

Zare

et al. 2023

Sci Rep

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This study develops a model for electrical conductivity of polymer carbon nanofiber (CNF) nanocomposites (PCNFs), which includes two steps. In the first step, Kovacs model is developed to consider the CNF, interphase and tunneling regions as dissimilar zones in the system. In the second step, simple equations are expressed to estimate the resistances of interphase and tunnels, the volume fraction of CNF and percolation onset. Although some earlier models were proposed to predict the electrical conductivity of PCNFs, developing of Kovacs model causes a better understanding of the effects of main factors on the nanocomposite conductivity. The developed model is supported by logical influences of all factors on the conductivity and by experimented conductivity of several samples. The calculations show good accordance to the experimented data and all factors rationally manage the conductivity of PCNFs. The highest conductivity of PCNF is gained as 0.019 S/m at the lowest ranges of polymer tunnel resistivity (ρ = 500 Ω m) and tunneling distance (d = 2 nm), whereas the highest levels of these factors (ρ > 3000 Ω m and d > 6 nm) cannot cause a conductive sample. Also, high CNF volume fraction, poor waviness, long and thin CNF, low “k”, thick interphase, high CNF conduction, high percentage of percolated CNFs, low percolation onset and high interphase conductivity cause an outstanding conductivity in PCNF.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Development of Kovacs model for electrical conductivity of carbon nanofiber–polymer systems

Arjmandi

Yeganeh

Zare

et al. 2023

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, there is a growing demand for materials with improved properties as the existing ones do not always meet the performance requirements. To meet challenges, researchers are developing methods of fabricating polymer nanostructures with enhanced properties by modifying known materials with additives [1][2][3][4][5]. CNTs are promising candidates for reinforcing various polymers as they have remarkable mechanical strength, rigidity, and electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Polymer Nanocomposite Based on Pyrolyzed Polyacrylonitrile Doped with Carbon Nanotubes: Synthesis, Properties, and Mechanism of Formation

Zaporotskova,

Kakorina,

Kozhitov

et al. 2024

Polymers

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The paper investigates the possibility of fabricating a carbon nanotubes (CNT)-modified nanocomposite based on pyrolyzed polyacrylonitrile (PPAN). The layered structure of PPAN ensures the attachment of nanotubes (NT) to the polymer matrix, forming enhanced PPAN/CNT nanocomposites. We synthesized a PPAN/CNT polymer nanocomposite and investigated its mechanical, conductive, and electronic properties. Using the quantum chemical method density functional theory (DFT), we studied an interaction mechanism between PPAN and single-walled carbon nanotubes. We described the structural features and electron energy structure of the obtained systems. We found that the attachment of a CNT to the PPAN matrix increases tensile strength, electrical conductivity, and thermal stability in the complex. The obtained materials were exposed to electromagnetic radiation and the dielectric constant, reflection, transmission, and absorption coefficients were measured. The study demonstrates the possibility of using carbon nanotubes for reinforcing polyacrylonitrile polymer matrix, which can result in the development of an enhanced class of materials possessing the properties of both polymers and CNTs.

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Facile Preparation of a Wet-Laid Based Graphite Nanoplate and Polyethylene Terephthalate Staple Fiber Composite for Textile-Structured Rollable Electronics

Sun

Ali

Anjum

et al. 2021

Journal of Elec Materi

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Polymer tunneling resistivity between adjacent carbon nanotubes (CNT) in polymer nanocomposites

Cited by 6 publications

References 51 publications

Development of Kovacs model for electrical conductivity of carbon nanofiber–polymer systems

Development of Kovacs model for electrical conductivity of carbon nanofiber–polymer systems

Polymer Nanocomposite Based on Pyrolyzed Polyacrylonitrile Doped with Carbon Nanotubes: Synthesis, Properties, and Mechanism of Formation

Facile Preparation of a Wet-Laid Based Graphite Nanoplate and Polyethylene Terephthalate Staple Fiber Composite for Textile-Structured Rollable Electronics

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