Towards suppressing loss tangent: Effect of SiO2 coating layer on dielectric properties of core-shell structure flaky Cu reinforced PVDF composites

Zhou, Wenying; Li, Xu; Jiang, Li; Peng, Jiangtao; Gong, Ying; Liu, Xiangrong; Cai, Huiwu; Wang, Guangheng; Chen, Qingguo

doi:10.1016/j.jallcom.2017.03.232

Cited by 50 publications

(20 citation statements)

References 31 publications

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“…With the rapid development of the microelectronics industry, the status of the thermal interface materials (TIMs) is becoming more and more important . Improving the heat transfer properties of TIMs is the basic way to solve heat dissipation problem of electronic products with high energy density .…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Irregular Shaped Particles and Graphene on the Thermal Conductivity of Epoxy Composites

et al. 2018

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Improving the heat transfer properties of the thermal interface materials (TIMs) is the basic way to solve heat dissipation problem of electronic products with high energy density. In this study, the synergistic heat transfer between graphene and irregular particles at low loading is systematically studied; these irregular shaped particles include Ag, Cu, and MgO. When the mass fraction of the irregular shaped particles is <20%, the heat transfer network chain is mainly formed by the fully dispersed graphene. However, when the irregular shaped particle mass fraction reaches 30%, more heat transfer network chain will form between particles. In addition, the interfacial thermal resistance between fillers and matrix is the most crucial factor, and the intrinsic thermal conductivity of irregular particles is a relatively minor factor for the synergistic heat transfer between graphene and irregular particles at low loading. POLYM. COMPOS., 40:E1294–E1300, 2019. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Irregular Shaped Particles and Graphene on the Thermal Conductivity of Epoxy Composites

et al. 2018

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“…c . A different type of core‐shell has also be reported to have a different vision of core‐shell structure . The decreasing grain size of nanocomposite with the decrease in CFO particle size has been observed from the AFM micrographs (Fig.…”

Section: Resultsmentioning

confidence: 93%

Optimization of dielectric properties of PVDF–CFO nanocomposites

2018

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Incorporation of different types of nanofillers in the PVDF poly(vinylidene difluoride) matrix exhibits promising dielectric, magnetic, piezo, pyro, and ferroelectric properties for various applications. Hence a novel nanocomposite has been developed by using PVDF and cobalt ferrite (CFO) (CoFe 2 O 4 ) with different particle size of CFO for dielectric applications. The nanocomposite has been characterized by the X-ray diffraction pattern, atomic force microscopy, transmission electron microscopy, fourier transform infrared spectroscopy, field emission-scanning electron microscopy), and dielectric measurements. The space charge effect at the PVDF and CFO interfaces offers the interfacial polarization in nanocomposite, which contribute to tune the dielectric response of nanocomposite along with low dielectric loss. The filler size has been optimized to have better formation of polar β phase in PVDF along with high dielectric properties. The dielectric constant in nanocomposite has increased three times compare to that of PVDF. The 20 ± 1 nm size (CFO) filler in PVDF matrix exhibits optimized dielectric properties.

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“…Such a core–shell structure approach has been widely used in experimental, and various buffer layer with lower dielectric constant, e.g., Al 2 O 3 , SiO 2 , TiO 2 , have been coated onto the high dielectric constant core . For example, Marks and co‐workers reported a layer‐by‐layer method to coat Al 2 O 3 shells on the surface of high‐ε r ceramic nanoparticles including BaTiO 3 , ZrO 2 , MgO, SrTiO 3 , and Ba 0.5 Sr 0.5 TiO 3 .…”

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

201

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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Towards suppressing loss tangent: Effect of SiO2 coating layer on dielectric properties of core-shell structure flaky Cu reinforced PVDF composites

Cited by 50 publications

References 31 publications

Synergistic Effect of Irregular Shaped Particles and Graphene on the Thermal Conductivity of Epoxy Composites

Synergistic Effect of Irregular Shaped Particles and Graphene on the Thermal Conductivity of Epoxy Composites

Optimization of dielectric properties of PVDF–CFO nanocomposites

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

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