Physical Principles of the Conductivity of Electrically Conductive Polymer Composites (Review)

Aneli, Jimsher; Заиков, Г. Е.; Mukbaniani, O.

doi:10.1080/15421406.2012.633866

Cited by 25 publications

(14 citation statements)

References 32 publications

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“…Although some reviews regarding conductive polymers have been reported, the negative permittivity of PANI and its nanocomposites have not yet been reviewed. In this review, the fundamentals of negative permittivity are critically examined, and the research reports on PANI and its nanocomposites with negative permittivity are discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

Polyaniline nanocomposites with negative permittivity

Guo

Wei

et al. 2013

J of Applied Polymer Sci

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In this review, the fundamentals of negative permittivity are critically discussed. Current research on polyaniline and its nanocomposites with negative permittivity are presented in detail. The reasons why these unique materials show negative permittivity are analyzed. This knowledge will be useful for future metacomposite design and manufacturing. These polymeric materials with negative permittivity are envisioned to create next-generation left-hand media for cloaking, subwavelength imaging, stealth, and invisibility applications.

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Section: Introductionmentioning

confidence: 99%

Polyaniline nanocomposites with negative permittivity

Guo

Wei

et al. 2013

J of Applied Polymer Sci

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“…This was achieved by mixing a high volume content, over 50%, of the inhomogeneous ceramic filler in a polymer binder. At such high volume content, it is likely the ceramic filler is above the percolation threshold and conductive paths form over the thickness of the composite [20][21][22]. The question then remains whether such high volume content is required, or merely the formation of conductive paths.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle contact on the electrical performance of NTC-epoxy composite thermistors

Deutz

Zwaag

Groen

2020

Mater. Res. Express

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As demand rises for flexible electronics, traditionally prepared sintered ceramic sensors must be transformed into fully new sensor materials that can bend and flex in use and integration. Negative temperature coefficient of resistance (NTC) ceramic thermistors are preferred temperature sensors for their high accuracy and excellent stability, yet their high stiffness and high temperature fabrication process limits their use in flexible electronics. Here, a low stiffness thermistor based on NTC ceramic particles of micron size embedded in an epoxy polymer matrix is reported. The effect of particle-to-particle contact on electrical performance is studied by arranging the NTC particles in the composite films in one of three ways: (1) Low particle contact, (2) Improved particle contact perpendicular to the electrodes and (3) dispersing high particle contact agglomerated clumps throughout the polymer. At 50 vol.% of agglomerated NTC particles, the composite films exhibit a β-value of 2069 K and a resistivity, ρ, of 3.3 · 10 5 Ωm, 4 orders of magnitude lower than a randomly dispersed composite at identical volume. A quantitative analysis shows that attaining a predominantly parallel connectivity of the NTC particles and polymer is a key parameter in determining the electrical performance of the composite film.

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“…However, for the purposeful control over their properties and the development of materials with required sets of parameters, one has to know those factors that govern the variation of the main electrophysical properties of such materials. In spite of the fact that a considerable number of theoretical and experimental works in the scientific literature deal with some of the indicated issues [10][11][12][13][14], there are no systematic results and regularities that would relate the fabrication methods, structure, and electric parameters of such complicated systems with one another.…”

Section: Introductionmentioning

confidence: 99%

“…The results of researches concerning the electric conductivity in the considered composites are usually interpreted in the framework of percolation theory [12,[20][21][22][23][24], and their dielectric properties are analyzed on the basis of ideas of an interlayer polarization of the Maxwell-Wagner type [25][26][27][28][29]. The both interpretations are based on a model of two-component systems, which ignores the presence of transient layers with the electric properties distinct from those of a polymer.…”

Section: Introductionmentioning

confidence: 99%

ize Effects in Electrical Properties of Carbon-Polypropylene Composites

Тонкошкур¹,

Lyashkov²,

Degtyaryov³

2016

Ukr. J. Phys.

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PACS 72.80. Le, 82.35.Np The temperature dependences of the resistance, current-voltage characteristics, and dielectric spectra of composites based on polypropylene and fillers made of micro-and nano-sized carbon particles have been studied. A reduction in the average size of conducting filler particles is found to decrease the resistivity magnitude, to shift the posistor section in the current-voltage characteristics toward lower electric fields and larger currents, and to increase the low-frequency dielectric permittivity of the researched composites. It is shown that these "size"effects can be explained by a growth of the effective fraction of the volume occupied by the conducting filler owing to the emergence of interfacial boundary layers in the polypropylene matrix. The electric properties of the layers differ from those for bulk polyethylene, and charge carriers can move in them. In other words, a change in the size of carbon particles gives rise to changes in the specific area and the effective fraction of the conducting filler.K e y w o r d s: composite, carbon filler, conductivity, dielectric permittivity, interphase layer.

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Physical Principles of the Conductivity of Electrically Conductive Polymer Composites (Review)

Cited by 25 publications

References 32 publications

Polyaniline nanocomposites with negative permittivity

Polyaniline nanocomposites with negative permittivity

Effect of particle contact on the electrical performance of NTC-epoxy composite thermistors

ize Effects in Electrical Properties of Carbon-Polypropylene Composites

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