2022
DOI: 10.1021/acs.macromol.2c00259
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Extraordinarily High Dielectric Breakdown Strength of Multilayer Polyelectrolyte Thin Films

Abstract: The increased use of high-voltage electronics requires higher performance dielectric materials. These electrically insulating layers need as high of a dielectric breakdown strength as possible. Herein, multiple polyelectrolyte layer-by-layer assemblies were studied as high-voltage insulators. The influences of molecular weight, polymer backbone architecture, and thermal cross-linking were investigated. It was found that increasing the molecular weight of either the polycation or polyanion increases the breakdo… Show more

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Cited by 14 publications
(21 citation statements)
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“…Thermogravimetric analysis (TGA) was performed under air with a ramp of 10 °C min −1 using a A50 Thermogravimetric Analyzer (TA Instruments, New Castle, DE). Dielectric measurements were collected according to a previously published procedure, [ 24 ] with a voltage ramp rate of 0.01–0.05 kV s −1 and a 1 mA readout signaling the breakdown of the film. Breakdown strength was measured in ambient conditions using an SCI 290 Series Hipot Tester (Lake, Forest, IL) as a DC voltage source coupled with a spring‐loaded PolyK test fixture (Philipsburg, PA) to ensure constant electrode‐surface contact (≈0.52 mm 2 ).…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Thermogravimetric analysis (TGA) was performed under air with a ramp of 10 °C min −1 using a A50 Thermogravimetric Analyzer (TA Instruments, New Castle, DE). Dielectric measurements were collected according to a previously published procedure, [ 24 ] with a voltage ramp rate of 0.01–0.05 kV s −1 and a 1 mA readout signaling the breakdown of the film. Breakdown strength was measured in ambient conditions using an SCI 290 Series Hipot Tester (Lake, Forest, IL) as a DC voltage source coupled with a spring‐loaded PolyK test fixture (Philipsburg, PA) to ensure constant electrode‐surface contact (≈0.52 mm 2 ).…”
Section: Methodsmentioning
confidence: 99%
“…This coating method has been shown to impart flame retardancy, [16,17] corrosion protection, [18,19] heat shielding, [20,21] gas barrier, [22,23] and more recently, and high dielectric breakdown strength. [24] When nanoplatelets are integrated into an LbL coating, typically as the anionic species, it resembles a nanobrick wall of platelets held together with a thin polymer mortar. [25][26][27] This microstructure is particularly beneficial for dielectric breakdown strength because it creates a tortuous path for charge transport, which inhibits the breakdown of the material.…”
Section: Introductionmentioning
confidence: 99%
“…Polyelectrolyte-based materials, commonly comprised of a composite formed by a pairing of two oppositely charged polymers, possess a virtually limitless range of properties that make them useful in fire protection, [1,2] food packaging, [3,4] drug delivery, [5,6] antifouling, [7] insulation, [8] and more. They are very popular materials because they can be processed in an aqueous solvent, are often environmentally benign, and sometimes are bio-based and/ or biodegradable.…”
Section: Introductionmentioning
confidence: 99%
“…9,[18][19][20][21][22] Conventional dielectric energy storage materials include bulk ceramics, inorganic thin films, polymers, and polymerbased nanocomposites. [22][23][24][25][26][27][28] Among these, the polymer-based nanocomposites with easier processing, good mechanical flexibility, and higher breakdown strength make them a promising candidate material for electrostatic capacitor applications. However, the dielectric constant (K) of polymer-based composite films is improved via incorporating different dimensional high-K inorganic fillers.…”
Section: Introductionmentioning
confidence: 99%