Percolation properties of metal-filled polymer films, structure and mechanisms of conductivity

Roldughin, V. I.; Высоцкий, В. В.

doi:10.1016/s0300-9440(00)00140-5

Cited by 178 publications

(115 citation statements)

References 59 publications

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“…At first, carbon black [1,2], metallic powder [3][4][5], polyaniline [6] and graphite [7] were used as electrical reinforcement in polymer, but high concentration was necessary to achieve the percolation threshold which endangered the mechanical properties of the nanocomposites due to the formation of agglomerations. Later, several researchers proposed polymer nanocomposites reinforced with graphene nanoparticles and its derivatives (expanded graphite, graphene nanoplatelets, graphite oxide, functionalized graphene/expanded graphite), which are able to form more stable 3D conductive networks in lower volume content as a consequence of their high aspect ratio (AR-ratio of main particle dimension to minor one) [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Predictive Model of Graphene Based Polymer Nanocomposites: Electrical Performance

2016

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In this computational work, a new simulation tool on the graphene/polymer nanocomposites electrical response is developed based on the finite element method (FEM). This approach is built on the multi-scale multi-physics format, consisting of a unit cell and a representative volume element (RVE). The FE methodology is proven to be a reliable and flexible tool on the simulation of the electrical response without inducing the complexity of raw programming codes, while it is able to model any geometry, thus the response of any component. This characteristic is supported by its ability in preliminary stage to predict accurately the percolation threshold of experimental material structures and its sensitivity on the effect of different manufacturing methodologies. Especially, the percolation threshold of two material structures of the same constituents (PVDF/Graphene) prepared with different methods was predicted highlighting the effect of the material preparation on the filler distribution, percolation probability and percolation threshold. The assumption of the random filler distribution was proven to be efficient on modelling material structures obtained by solution methods, while the through-the -thickness normal particle distribution was more appropriate for nanocomposites constructed by film hot-pressing. Moreover, the parametrical analysis examine the effect of each parameter on the variables of the percolation law. These graphs could be used as a preliminary design tool for more effective material system manufacturing.

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Section: Introductionmentioning

confidence: 99%

Predictive Model of Graphene Based Polymer Nanocomposites: Electrical Performance

2016

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“…The AC Conductivity is nearly constant up to 10wt%, after that, it increases rapidly with increasing NaF salt concentration. The value of about 10wt% dopant content can be considered a critical one and called a percolation threshold for the thin films composites 28,29 .It is a general thought that the AC conductivity is related to frequency as reported in the empirical Jonscher universal law model which is given by the equation (σAC(f) = σDC+Bf m ).Where B and m are coefficients, f is the frequency of the applied field (Hz), σDC is the DC conductivity of the material, and σAC is the AC conductivity in (Ωm) -1 . At higher frequencies, the conductivity increases as a power of frequency with exponent 0 < m < 1.In this case, B and m are temperature dependents.…”

Section: Ac Conductivity Of Pan+ Sodium Fluoride (Naf)mentioning

confidence: 99%

Ac Conductivity and Thermal Studies of Pan-Nafdoped Gel Polymer Electrolytes for Solid State Battery Applications

2017

Rasayan J Chem

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Thin film membranes of poly acrylonitrile (PAN) doped with sodium Fluoride (NaF) was prepared by solution casting technique. The Gel polymer Electrolyte films exhibiting an average thickness of 142 µm. The films were prepared with different (wt %) ratios. The structural formations were analyzed by X-Ray Diffraction method (XRD).The Conductivity Studies (AC) and thermal conductivity studies (DSC) of the different ratios of gel polymer electrolyte composites were studied. The AC conductivity studies were determined from the impedance data and thermal conductivity studies were measured using the transient electric pulse method. The AC Conductivity increases with increasing temperature and NaF Concentration. The formed fluoride complexes also contribute in increasing the AC quantities. The DSC measurements showed a decrease in the degree of crystallinity and increase of amorphous regions with increasing concentration of salt NaF. The sample containing 70PAN:30NaF exhibited the maximum conductivity of 1.82x10 -4 S cm -1 at room temperature (303K) and 2.96x10 -3 S cm -1 at 373K.

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“…The field of conjugated polymer semiconductors developed from a fundamental laboratory discovery into a manufacturing technological material for a range of thin-film nanostructures for electronics applications [1][2][3], which benefits from the compatibility of polymers with large-area, low-cost, room temperature solution processing, structural flexibility and directwrite printing. Since their discovery [4][5], polymer semiconductor applications now include emissive light-emitting diodes, flat panel displays, and low-cost thin film transistor circuits on flexible substrates [6].…”

Section: Introductionmentioning

confidence: 99%

Electronic Transport and Anisotropic Conductivity Behavior on PEDOT:PSS Nanoribbons and Nanostructuring Modification by Atomic Force Microscope Nanoshaving

Vega¹,

Wong²,

Vega³

et al. 2017

Polym Sci

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Nanoribbons of organic semiconductor salts, poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT-PSS), were deposited on silicon dioxide (SiO2) by the electrospinning technique. It is possible to "shave" or mechanically displace small regions of the polymer nanoribbon by using atomic force microscopy (AFM) nanolithography techniques such as nanoshaving, leaving swaths of the surface cut to the depth of thickness of the nanoribbon. By placing the nanoribbon between two electrode pads with a 10 μm gap, for the first time was performed nanoshaving on the nanoribbon by removing portions of PEDOT-PSS and simultaneously in-situ transport measurement properties of the nanoribbon's dependence on the remaining cross section, showed evidence of anisotropic nature of the conductivity of PEDOT-PSS nanoribbons.

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Percolation properties of metal-filled polymer films, structure and mechanisms of conductivity

Cited by 178 publications

References 59 publications

Predictive Model of Graphene Based Polymer Nanocomposites: Electrical Performance

Predictive Model of Graphene Based Polymer Nanocomposites: Electrical Performance

Ac Conductivity and Thermal Studies of Pan-Nafdoped Gel Polymer Electrolytes for Solid State Battery Applications

Electronic Transport and Anisotropic Conductivity Behavior on PEDOT:PSS Nanoribbons and Nanostructuring Modification by Atomic Force Microscope Nanoshaving

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