Breakdown Voltage of Thermoplastics with Clay Nanometer-Sized Fillers

Brandstetter, Stephen S; Drummy, Lawrence F.; Horwath, J.; Schweickart, D.L.; Vaia, Richard A.

doi:10.1109/ipmc.2008.4743638

Cited by 13 publications

(23 citation statements)

References 12 publications

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“…The high performance devices need to have a storage energy system in the form of dielectrics with a high energy density, great maximum voltage limit, and scalable uniform defect free lm construction. 112,113 Nanocomposite structures are being considered for this application. 114,115 For instance, Kim et al 116 reported that by incorporation of 50 vol% BaTiO 3 into a P(VDF-HFP) polymer the relative permittivity can be increased to 32 and the theoretical energy density is 15-20% (up to 5.6 J cm À3 ) more than that of unlled P(VDF-HFP).…”

Section: Effect Of Layer-by-layer Structure On Dielectric Breakdown S...mentioning

confidence: 99%

“…Technologies arising from theoretical and experimental investigations showed that a tailored architecture manufactured by controlling the layer-by-layer assembly of functional nanosheets via advanced physical or chemical methods can improve the high eld response with high dielectric permittivity. 1,113 Dielectric nanosheets with a high dielectric constant were combined with various materials such as single nanolayers or different compositions, Fig. 9.…”

Section: Effect Of Layer-by-layer Structure On Dielectric Breakdown S...mentioning

confidence: 99%

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A review on hybrid nanolaminate materials synthesized by deposition techniques for energy storage applications

et al. 2014

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Section: Effect Of Layer-by-layer Structure On Dielectric Breakdown S...mentioning

confidence: 99%

Section: Effect Of Layer-by-layer Structure On Dielectric Breakdown S...mentioning

confidence: 99%

A review on hybrid nanolaminate materials synthesized by deposition techniques for energy storage applications

et al. 2014

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“…Layered/interwoven architectures can also be generated through the dispersion and alignment of high aspect ratio, nanometer thick sheets of montmorillonite within a polymer matrix. The breakdown strength of such nanolaminates was found to increase by 30–50% relative to the unfilled polymer film. , …”

Section: Introductionmentioning

confidence: 97%

“…The breakdown strength of such nanolaminates was found to increase by 30−50% relative to the unfilled polymer film. 20,21 An undetermined issue with the coextruded multilayers is that of layer homogeneity due to spatial thickness variations, large micron-sized defects and layer delamination because of poor adhesion. In contrast to macroscopic processing, selfassembling polymer systems generate much more uniform and well-controlled nanostructured layers.…”

Section: ■ Introductionmentioning

confidence: 99%

Directed Self-Assembly of Block Copolymers for High Breakdown Strength Polymer Film Capacitors

Samant

Grabowski

Kisslinger

et al. 2016

ACS Appl. Mater. Interfaces

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Emerging needs for fast charge/discharge yet high-power, lightweight, and flexible electronics requires the use of polymer-film-based solid-state capacitors with high energy densities. Fast charge/discharge rates of film capacitors on the order of microseconds are not achievable with slower charging conventional batteries, supercapacitors and related hybrid technologies. However, the current energy densities of polymer film capacitors fall short of rising demand, and could be significantly enhanced by increasing the breakdown strength (EBD) and dielectric permittivity (εr) of the polymer films. Co-extruded two-homopolymer component multilayered films have demonstrated much promise in this regard showing higher EBD over that of component polymers. Multilayered films can also help incorporate functional features besides energy storage, such as enhanced optical, mechanical, thermal and barrier properties. In this work, we report accomplishing multilayer, multicomponent block copolymer dielectric films (BCDF) with soft-shear driven highly oriented self-assembled lamellar diblock copolymers (BCP) as a novel application of this important class of self-assembling materials. Results of a model PS-b-PMMA system show ∼50% enhancement in EBD of self-assembled multilayer lamellar BCP films compared to unordered as-cast films, indicating that the breakdown is highly sensitive to the nanostructure of the BCP. The enhancement in EBD is attributed to the "barrier effect", where the multiple interfaces between the lamellae block components act as barriers to the dielectric breakdown through the film. The increase in EBD corresponds to more than doubling the energy storage capacity using a straightforward directed self-assembly strategy. This approach opens a new nanomaterial paradigm for designing high energy density dielectric materials.

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“…In PE-based nanocomposites containing nano-alumina, increased DC conduction has been shown to lead to reduced DC dielectric breakdown strength values, [14] and presumably, comparable relationships would be anticipated in systems including organoclays. However, it has been reported that the presence of an organoclay can lead to an increase in AC dielectric breakdown strength, when the filler is well dispersed [5,15], and a reduction in AC dielectric breakdown strength when significant agglomeration has occurred [16]. Elsewhere, the electrical performance of samples quenched rapidly from the melt was found to be invariant to the presence of an organoclay, which is in contrast to the increased breakdown strength seen in equivalent systems following isothermal crystallisation of the matrix polymer in the absence of the organoclay [8].…”

Section: Introductionmentioning

confidence: 99%

The effect of organoclay loading and matrix morphology on charge transport and dielectric breakdown in an ethylene-based polymer blend

2019

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The effect of an organoclay on the electrical properties of a polymeric host is described. The matrix was composed of a blend of high-and low-density polyethylene, to which an ethylene/(vinyl acetate) copolymer was added, to increase compatibility between the organoclay and the matrix and, thereby, improve the organoclay dispersion. The ratio between the compatibiliser and organoclay was found to be important in forming a well-dispersed system, as evidenced by thermogravimetric analysis, X-ray diffraction and scanning electron microscopy, indicating the effectiveness of the chosen compatibilisation strategy. DC conductivity was found to be determined by the precise distribution of the organoclay throughout the system; changes in morphology and phase structure of the matrix polymer resulting from changes in imposed thermal history had little effect per se, but varying degrees of self-assembly of the organoclay facilitated by different residence times within the quiescent melt could result in changes in overall DC conductivity of several orders of magnitude. Consequent increases in DC conductivity led to reductions in DC breakdown strength, implying failure through some avalanche or thermal process. However, a monotonic increase in observed AC breakdown strength implies that the associated underlying failure process is then very different.

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Breakdown Voltage of Thermoplastics with Clay Nanometer-Sized Fillers

Cited by 13 publications

References 12 publications

A review on hybrid nanolaminate materials synthesized by deposition techniques for energy storage applications

A review on hybrid nanolaminate materials synthesized by deposition techniques for energy storage applications

Directed Self-Assembly of Block Copolymers for High Breakdown Strength Polymer Film Capacitors

The effect of organoclay loading and matrix morphology on charge transport and dielectric breakdown in an ethylene-based polymer blend

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