Enhanced dielectric, electromechanical and hydrophobic behaviors of core-shell AgNWs@SiO2/PDMS composites

Zhou, Zhou; Wang, Hao; Zhu, Zhicai; Yang, Hui; Zhang, Qilong

doi:10.1016/j.colsurfa.2018.11.067

Cited by 29 publications

(16 citation statements)

References 44 publications

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“…Both samples show characteristic peaks in Sr 3d, Ce 3d, O 1s in the XPS full spectrum. The characteristic peak in Si 2p appears in the XPS spectrum of Sr 2 CeO 4 @SiO 2 , which further confirms the composition of the coating layer [29,30]. Figure 3b-f shows the high-resolution spectra of Si 2p, O 1s, Sr 3d, Ce 3d, and C 1s for the two systems, respectively.…”

Section: Characterization Of Fillers and Compositessupporting

confidence: 61%

“…Since Sr 2 CeO 4 @SiO 2 has a higher dielectric loss (τ ε ) compared to the COC matrix, the τ ε of the composites increases with the introduction of fillers. As the frequency increases, the orientation polarization gradually weakens until it disappears [30], resulting in a decrease in the τ ε of the composites. When the filler content is 20 vol%, the τ ε of the composite is 0.11 at 10 6 Hz and decreases to 0.0023 at 10 GHz, which shows that the τ ε at high frequencies is significantly lower than that at low frequencies.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

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Core-Shell Sr2CeO4@SiO2 Filled COC-Based Composites with Low Dielectric Loss for High-Frequency Substrates

Wang

Zhang³

et al. 2021

Polymers

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High-frequency communication equipment urgently needs substrate materials with lower dielectric loss, better heat dissipation, and higher stability, to ensure real-time low-loss and high-speed signal transmission. The core-shell structure of Sr2CeO4@SiO2 was prepared by the sol-gel method, and the modified powders with different volume contents were introduced into the cyclic olefin copolymer (COC) to prepare hydrocarbon resin-based composites. Due to the protective effect of the SiO2 shell, the stability of the powders is significantly improved, and the moisture barrier and corrosion resistance of the composites are enhanced, which is conducive to the normal operation of electronic equipment in harsh and complex environments. When the filler content is 20 vol%, the composite has a dielectric loss of 0.0023 at 10 GHz, a dielectric constant of 3.5, a thermal conductivity of 0.9 W·m−1·K−1, a water absorption of 0.32% and a coefficient of thermal expansion of 37.7 ppm/°C. The COC/Sr2CeO4@SiO2 composites exhibit excellent dielectric properties and thermal conductivity, while maintaining good moisture resistance and dimensional stability, which shows potential application prospects in the field of high-frequency substrates.

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Section: Characterization Of Fillers and Compositessupporting

confidence: 61%

Section: Dielectric Propertiesmentioning

confidence: 99%

Core-Shell Sr2CeO4@SiO2 Filled COC-Based Composites with Low Dielectric Loss for High-Frequency Substrates

Wang

Zhang³

et al. 2021

Polymers

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“…It is accredited to the exceptional intrinsic thermal conductivity of Ag, mainly contributed from electronic transfer and phonon lattice vibration. Further, the enhanced dielectric, electromechanical and hydrophobic behaviors of core-shell Ag nano-wires (Ag NWs) in SiO 2 filler into polydimethylsiloxane (PDMS) based composites were prepared by sol gel technique and it is reported by Zhang et al [68] and his co-workers. The polydimethylsiloxane (PDMS) is act as a polymer resin which is used in the field of insulators, coatings, medical devices, actuators and adhesives.…”

Section: Figure 2 Thermal Conductivity Of (A) Al 2 O 3 -Ag Nps-epoxy Composites As a Function Of Ag Contents (B) Variation Of Thermal Conmentioning

confidence: 99%

Synthesis, Dielectric and Electrical Properties of Silver-Polymer Nanocomposites

Gadtya¹,

Nayak²,

Mahaling³

2021

Silver Micro-Nanoparticles - Properties, Synthesis, Characterization, and Applications

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Metallic nanoparticles and its composites have emerged as valuable asset in all phases of material science and engineering including electronic, optics and electromagnetic domains. Silver nanoparticles (Ag NPs) are one of the most vital and fascinating nanomaterials among several metallic nanoparticles due to its large surface ratio and outstanding properties with diverse field of potential applications. We demonstrated various synthesis techniques of nanocomposites, silver nanoparticles and composite based on these particles have shown great importance because of the remarkable properties (high electrical and thermal conductivity, good chemical stability and catalytic properties) of silver nanoparticles. This chapter provides various synthesis techniques for preparation of silver nanoparticles and their composites with dielectric and electrical properties in a lucid manner. The detail discussions of silver-polymer nanocomposites, emphasizing on each individual synthesis routes and properties have been carried out.

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“…20 Zhou et al introduced core-shell AgNWs@SiO 2 fillers in PDMS to enhance the dielectric, electromechanical, and hydrophobic properties of the polymer. 21 However, to date, only a few researchers have studied the effects that a filler has on the dielectric properties and dielectric behavior of PMPS. 15,22,23 Silica particles are the traditional choice of fillers for silicones because of they have good interactions with the silicone matrix.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties and dielectric relaxation process of polymethylphenylsiloxane/silicon dioxide nanocomposites

Zhao

Huang

et al. 2022

J of Applied Polymer Sci

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In recent years, polysiloxane dielectric elastomers (DEs) have attracted extensive attention, but their low dielectric constant and electrical breakdown strength are the main factors that limit their wide application. In this work, we report the effects that a high content of hydrophobic silica has on the dielectric properties and dielectric relaxation behavior of polymethylphenylsiloxane (PMPS). Introducing a high content of hydrophobic silica into PMPS composites increased the dielectric constant of PMPS composites from 3.11 to 3.70 and the breakdown strength of PMPS composites from 35.31 to 42.66 kv/mm. The high content of

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Enhanced dielectric, electromechanical and hydrophobic behaviors of core-shell AgNWs@SiO2/PDMS composites

Cited by 29 publications

References 44 publications

Core-Shell Sr2CeO4@SiO2 Filled COC-Based Composites with Low Dielectric Loss for High-Frequency Substrates

Core-Shell Sr2CeO4@SiO2 Filled COC-Based Composites with Low Dielectric Loss for High-Frequency Substrates

Synthesis, Dielectric and Electrical Properties of Silver-Polymer Nanocomposites

Dielectric properties and dielectric relaxation process of polymethylphenylsiloxane/silicon dioxide nanocomposites

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