Modeling the interphase of a polymer-based nanodielectric

Daily, Connor; Sun, Weixing; Kessler, Michael R.; Tan, Xiaoli; Bowler, Nicola

doi:10.1109/tdei.2013.004181

Cited by 26 publications

(9 citation statements)

References 26 publications

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“…Maity et al [ 19 ] combined dielectric spectroscopic measurements with a finite element method‐based model to characterize interphase. To predict the permittivity of the interphase, Daily et al [ 133 ] proposed a three‐phase theoretical model. Using experimental results and Wiener bounds, possible values of interphase permittivity are calculated.…”

Section: Dielectric Interfacesmentioning

confidence: 99%

Dielectric polymer nanocomposites: Past advances and future prospects in electrical insulation perspective

Pandey

Singh

2021

SPE Polymers

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Polymeric materials enjoy widespread acceptance among electrical insulation design engineers due to their multi‐functional attributes (e.g., excellent dielectric properties, high strength to weight ratio, and ease of molding). However, charge accumulation at the high DC field, poor discharge resistance, low thermal conductivity, limited‐service temperature range, and inadequate stiffness have proven to be severe obstructions to far‐reaching utilization of these materials. To ensure the reliability of today's electrical power systems, novel dielectric materials with enhanced functionalities are essential. An idea that originated under the name of polymer nanocomposites (PNCs) is supposed to provide a viable solution to the challenges mentioned earlier. PNCs are made by mixing a small quantity of nanometer‐sized fillers into a polymer matrix and dispersing them uniformly. To effectively use PNCs in electrical insulation for power apparatus, extensive research into the physical and chemical phenomena associated with these new materials is required. This article aims to provide a comprehensive review of previous research on dielectric PNCs, including synthesis, electrical and nonelectrical characterization, and attendant issues from an electrical insulation standpoint.

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Section: Dielectric Interfacesmentioning

confidence: 99%

Dielectric polymer nanocomposites: Past advances and future prospects in electrical insulation perspective

Pandey

Singh

2021

SPE Polymers

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“…The dielectric enhancement by interface and its contribution to the composite have been identified by some theoretical works. Different from standard two‐phase mixture models such as the famous Maxwell–Garnett formula, in these interface‐involved theoretical models, the interface is usually considered as a separate phase (“interphase”) in addition to polymer and fillers . For example, Todd and Shi studied the complex permittivity of composite systems by an interphase power‐law model, which was constructed on the permittivity and volume fractions of matrix, filler, and interphase between them.…”

Section: Interfacial Enhancement Effect Of Breakdown Strength and Diementioning

confidence: 99%

Superior Energy Storage Performances of Polymer Nanocomposites via Modification of Filler/Polymer Interfaces

Zhang

Dong

et al. 2018

Adv Materials Inter

178

112

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systems, they have numerous applications in various fields as pulsed power supply technology, [8,9] energy harvesting, [10][11][12] inverters, [13][14][15] and passive elements, [16][17][18] toward both defense and civil industries. Excellent energy storage capabilities of dielectric materials including high discharged energy density and high energy efficiency have long been eagerly pursued to meet the challenges and needs of the rapid development of modern industry, i.e., the low energy density of current dielectric materials results in overburdened capacitor volume and weight in electrical power systems. The energy storage performances of dielectric materials are usually multiply determined by three major electrical and dielectric parameters, which are categorized as:1) The breakdown strength E b ;2) The relative permittivity (also called dielectric constant) ε r or electric displacement D (the electric displacement is related to the polarization P by D = P + ε 0 E, here ε 0 = 8.85 × 10 −12 F m −1 is the vacuum permittivity); 3) The dielectric loss tanδ.In general, as illustrated in Figure 1, the discharged energy density of dielectric materials can be determined aswhere E is the applied electric field, and the energy efficiency is calculated by Dielectric polymer nanocomposites by integration of high-E b polymer matrix and high-D(ε r ) ceramic fillers have shown great potential for dielectric and energy storage applications in modern electronic and electrical systems. Interface between ceramic fillers and polymer matrix is considered as a predominant factor to determine the dielectric performances of the nanocomposites. This review analyzes the influence of the interface on dielectric responses and breakdown strength in the nanocomposites, and discusses the viability of current interface engineering strategies in improving their energy storage capabilities. Two scopes of current interface modification approaches are focused from both structural and functional considerations in the dielectric ceramics/polymer nanocomposites: first, the organic/inorganic interface compatibility can be modified to generate homogeneous dispersion of ceramic nanoparticles in polymer matrix, which is the premise of fully realizing the synergistic combination of advantages of polymer and ceramic fillers; second, regulated local electrical and dielectric behaviors in interface region enable the enhancement of dielectric properties (both high dielectric constant and high breakdown strength) in resultant nanocomposites. In the last part, some present challenges and future perspectives are proposed to utilize the interface strategy for developing high energy density ceramics/ polymer nanocomposites for dielectric and energy storage applications.

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“…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%

“…Most of these studies have considered that there is no interphase zone between the insulating matrix and the conducting fillers, which leads to the fact that the interphase effect on the electrical conductivity is still under investigations . Recently, studies on electrical and dielectric characteristics of heterogeneous materials based on polymer composites filled with conducting charges have supported the existence of interphase regions between dispersed particles in the polymeric insulating matrix, due to combination and diffusion in polymeric networks . The orientation and arrangement of asymmetric macromolecular matrix and polydispersity of nanoparticles significantly affect the effective volume interphase region.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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.

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Modeling the interphase of a polymer-based nanodielectric

Cited by 26 publications

References 26 publications

Dielectric polymer nanocomposites: Past advances and future prospects in electrical insulation perspective

Dielectric polymer nanocomposites: Past advances and future prospects in electrical insulation perspective

Superior Energy Storage Performances of Polymer Nanocomposites via Modification of Filler/Polymer Interfaces

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

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