High dielectric permittivity and low loss tangent of polystyrene incorporated with hydrophobic core–shell copper nanowires

He, Linxiang; Tjong, S.C.

doi:10.1039/c5ra04731e

Cited by 19 publications

(16 citation statements)

References 53 publications

(45 reference statements)

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“…[9][10][11][12][13][14][15][16] Many efforts have been dedicated to enhance dielectric properties of polymeric materials. [16][17][18][19][20][21][22][23][24][25][26] However, low dielectric permittivity of the polymeric materials still poses a challenge. A conventional process typically used to increase the dielectric permittivity is by introducing electrical conductivity or incorporating conductive fillers into the polymer matrix to form a composite.…”

Section: Introductionmentioning

confidence: 99%

“…Polymeric materials with high values of the dielectric permittivity represent an important class of materials, with numerous applications in various fields of research and technology, such as for instance energy storage, sensors, organic electronics, actuators, and so forth . Many efforts have been dedicated to enhance dielectric properties of polymeric materials . However, low dielectric permittivity of the polymeric materials still poses a challenge.…”

Section: Introductionmentioning

confidence: 99%

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Polymer bilayers with enhanced dielectric permittivity and low dielectric losses by Maxwell–Wagner–Sillars interfacial polarization: Characteristic frequencies and scaling laws

Samet

Kallel

Serghei

2019

J of Applied Polymer Sci

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An efficient approach to obtain polymeric materials with high permittivity values and low dielectric losses is presented in the current study. For this purpose, dielectric measurements by means of broadband dielectric spectroscopy, numerical simulations, and analytical calculations have been carried out for bilayer structures consisting in an insulating and a conductive polymer layer. Polyethyleneterephtalate and polytetrafluoroethylene have been used as insulating layers while, as conductive materials, blends of polyvinyl acetate with an ionic liquid, 1‐butyl‐3‐methylimidazolium tetrafluoroborate. The dielectric properties of the samples have been investigated in a broad frequency (from 10−1 to 107 Hz) and temperature range in order to determine, through the analysis of the scaling laws governing the interfacial polarization effects, the characteristic frequency ranges and the amplitude of the enhanced permittivity. An excellent agreement is found between the experimental results, the numerical simulations, and the analytical calculations. Finally, we show that bilayer polymeric materials with permittivity values as high as ε′ = 556 and with low dielectric losses (tan(δ) = 0.001) can be readily obtained by the current approach. This could have multiple applications, especially in the field of organic electronics. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47551.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymer bilayers with enhanced dielectric permittivity and low dielectric losses by Maxwell–Wagner–Sillars interfacial polarization: Characteristic frequencies and scaling laws

Samet

Kallel

Serghei

2019

J of Applied Polymer Sci

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“…for PZT/PS composites with literature values for PS based composites with different fillers and concentrations, at r.t. and 1 MHz frequency [37][38][39] for the hot-press molded PZT/PS composite samples is in the range 0.10-0.14 over the temperature range 30 C to 140 C, making them good candidates for practical applications like embedded capacitors.…”

Section: F I G U R E 7 Comparison Of Loss Tangents Of Experimental Datamentioning

confidence: 99%

Thermal, mechanical, and dielectric properties of low loss PbZr₀_.₃Ti₀_.₇O₃/polystyrene composites prepared by hot‐press method

et al. 2020

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The incorporation of high dielectric constant filler particles into thermoplastics is an attractive approach to develop materials with high dielectric strength, low dielectric loss, and mechanical stiffness, for electronic packaging purposes. Herein, we report the preparation and properties of polystyrene (PS) based low loss 0-3 composites with inorganic PbZr 0.3 Ti 0.7 O 3 (PZT) filler particles in concentrations ranging from 0%-20% (w/w). The PZT particles were synthesized using the sol-gel process and the composites were prepared by a two-step, solvent-free approach: (1) melt mixing, followed by (2) hot press. The thermal and mechanical properties of the composite samples were investigated. The dielectric behavior of the as-synthesized composites showed pronounced improvement over pure PS, as is seen from the increased dielectric constant and extremely low loss tangent. For 20 wt.% PZT loading, the dielectric constant of the composite is as high as 12 at 1 MHz frequency, which is about five times greater than that of pure PS (ε = 2.5). All the PZT/PS composites exhibit remarkably low dielectric losses, even at lower frequencies (tan δ ≤ 0.04), which is better than reported literature values of PS based composites. The variation in dielectric constants of the samples with increasing temperatures was also recorded.

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“…The electrically conductive polymer composite materials (CMs) have received considerable attention due to their multi-functional applications in many engineering and electronic fields [1,2]. Carbon nanomaterials (carbon nanotubes and nanofibers, graphite nanoplatelets and graphene) due to their excellent properties such as lightweight, high corrosion resistance, high electrical and thermal conductivity [3,4], are now intensely used as fillers in polymer matrix for the development of novel materials with tunable electric/dielectric properties for many applications, including energy storage, piezoresistive sensing, and electromagnetic interference (EMI) shielding [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Polyethylene Composites with Segregated Carbon Nanotubes Network: Low Frequency Plasmons and High Electromagnetic Interference Shielding Efficiency

et al. 2020

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Polyethylene (PE) based composites with segregated carbon nanotubes (CNTs) network was successfully prepared by hot compressing of a mechanical mixture of PE and CNT powders. Through comparison with a composite comprising randomly distributed carbon nanotubes of the same concentration, we prove that namely the segregated CNT network is responsible for the excellent electrical properties, i.e., 10−1 S/m at 0.5–1% and 10 S/m at 6–12% of CNT. The investigation of the complex impedance in the frequency range 1 kHz–2 MHz shows that the sign of real part of the dielectric permittivity ε r ′ changes from positive to negative in electrically percolated composites indicating metal-like behavior of CNT segregated network. The obtained negative permittivity and AC conductivity behavior versus frequency for high CNT content (3–12%) are described by the Drude model. At the same time, in contrast to reflective metals, high electromagnetic shielding efficiency of fabricated PE composites in the frequency range 40–60 GHz, i.e., close to 100% at 1 mm thick sample, was due to absorption coursed by multiple reflection on every PE-CNT segregated network interface followed by electromagnetic radiation absorbed in each isolated PE granule surrounded by conductive CNT shells.

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High dielectric permittivity and low loss tangent of polystyrene incorporated with hydrophobic core–shell copper nanowires

Abstract: Core–shell copper nanowires for improving the dielectric performance of polystyrene.

Cited by 19 publications

References 53 publications

Polymer bilayers with enhanced dielectric permittivity and low dielectric losses by Maxwell–Wagner–Sillars interfacial polarization: Characteristic frequencies and scaling laws

Polymer bilayers with enhanced dielectric permittivity and low dielectric losses by Maxwell–Wagner–Sillars interfacial polarization: Characteristic frequencies and scaling laws

Thermal, mechanical, and dielectric properties of low loss PbZr₀_.₃Ti₀_.₇O₃/polystyrene composites prepared by hot‐press method

Polyethylene Composites with Segregated Carbon Nanotubes Network: Low Frequency Plasmons and High Electromagnetic Interference Shielding Efficiency

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High dielectric permittivity and low loss tangent of polystyrene incorporated with hydrophobic core–shell copper nanowires

Abstract: Core–shell copper nanowires for improving the dielectric performance of polystyrene.

Cited by 19 publications

References 53 publications

Polymer bilayers with enhanced dielectric permittivity and low dielectric losses by Maxwell–Wagner–Sillars interfacial polarization: Characteristic frequencies and scaling laws

Polymer bilayers with enhanced dielectric permittivity and low dielectric losses by Maxwell–Wagner–Sillars interfacial polarization: Characteristic frequencies and scaling laws

Thermal, mechanical, and dielectric properties of low loss PbZr0.3Ti0.7O3/polystyrene composites prepared by hot‐press method

Polyethylene Composites with Segregated Carbon Nanotubes Network: Low Frequency Plasmons and High Electromagnetic Interference Shielding Efficiency

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Thermal, mechanical, and dielectric properties of low loss PbZr₀_.₃Ti₀_.₇O₃/polystyrene composites prepared by hot‐press method