In situ reduction and self-alignment of reduced graphene oxide/poly(vinylidene fluoride) composite films: Toward high dielectric constant and suppressed loss

Yuan, Yingxin; Tang, Yaokai; Gao, Qiangmin; Wang, Xincheng; Cheng, Shangru; Liu, Hongfu; Guan, Shanshan

doi:10.1016/j.molstruc.2022.133656

Cited by 7 publications

(1 citation statement)

References 52 publications

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“…5 However, there exist an obvious trade-off when using these conductive or insulative fillers. For example, by incorporating conductive fillers such as metal nanoparticles, 6,7 carbon nanotubes (CNTs), [8][9][10][11] or graphene nano-pellets (GNPs), [12][13][14][15] it is possible to achieve high dielectric constant in composite materials but frequently accompanying with obvious leakage current, therefore resulting in serious dielectric loss. In comparison, perovskite ceramics incorporated polymer 16,17 materials usually have smaller dielectric loss, but the deteriorated thermal and mechanical properties brought by relatively large loading fraction of ceramics are other serious issues to be carefully considered.…”

Section: Introductionmentioning

confidence: 99%

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Zhang,

Yuan,

Song

et al. 2024

Polymer Composites

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As core components in electric/electronic fields, dielectric materials have recently received ever‐increasing interests. Among them, polymer‐based dielectric composites have drawn ever‐increasing attentions due to their high‐temperature resistance and excellent processibility. However, state‐of‐art studies mostly focus on the modification of single‐phase filler, while the heterogeneous three phase interactions between fillers and polymer matrix are rarely studied. To fill this gap, in this study, a novel strategy of interfacial design and structural construction of three‐phase BaTiO3/rGO/polymer nanocomposites have been promoted to simultaneously build interfacial barriers between adjacent rGO nanosheets and to enhance the interfacial polarization of rGO nanosheets for improved dielectric, thermal and mechanical properties. The dielectric constant of 0.6 wt% BT/ARGO/PEI reached 644@1 kHz with a dielectric loss of only 0.218, while these values for 0.5 wt% ARGO/PEI composites are 471 and 0.489, respectively. Meanwhile, the breakdown strength almost doubled (from 48 kV·mm−1 to 87 kV·mm−1) upon the addition of BaTiO3 (BT) nanoparticles. Moreover, the introduced BT nanoparticles significantly enhanced the intermolecular frictions between different materials and contributed largely to promoted mechanical and thermal properties. We therefore speculate this work establishes a strong foundation for fabricating three heterogeneous‐phase high dielectric polymer materials with excellent dielectric, thermal and mechanical properties.Highlights Graphene oxide was modified by APTES and reduced by L‐Ascorbic Acid. Three‐phase BT/ARGO/PEI composites showed enhanced dielectric properties. The incorporated BT nanoparticles reduced the dielectric loss. The thermal and mechanical properties of BT/ARGO/PEI composites are optimized. Interfacial interactions between different phase of materials are studied.

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Section: Introductionmentioning

confidence: 99%

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Zhang,

Yuan,

Song

et al. 2024

Polymer Composites

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Heterostructured Graphene@Silica@Iron Phenylphosphinate for Fire‐Retardant, Strong, Thermally Conductive Yet Electrically Insulated Epoxy Nanocomposites

Chen,

Huo,

et al. 2024

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The portfolio of extraordinary fire retardancy, mechanical properties, dielectric/electric insulating performances, and thermal conductivity (λ) is essential for the practical applications of epoxy resin (EP) in high‐end industries. To date, it remains a great challenge to achieve such a performanceportfolio in EP due to their different and even mutually exclusive governing mechanisms. Herein, a multifunctional additive (G@SiO2@FeHP) is fabricated by in situ immobilization of silica (SiO2) and iron phenylphosphinate (FeHP) onto the graphene (G) surface. Benefiting from the synergistic effect of G, SiO2 and FeHP, the addition of 1.0 wt% G@SiO2@FeHP enables EP to achieve a vertical burning (UL‐94) V‐0 rating and a limiting oxygen index (LOI) of 30.5%. Besides, both heat release and smoke generation of as‐prepared EP nanocomposite are significantly suppressed due to the condensed‐phase function of G@SiO2@FeHP. Adding 1.0 wt% G@SiO2@FeHP also brings about 44.5%, 61.1%, and 42.3% enhancements in the tensile strength, tensile modulus, and impact strength of EP nanocomposite. Moreover, the EP nanocomposite exhibits well‐preserved dielectric and electric insulating properties and significantly enhanced λ. This work provides an integrated strategy for the development of multifunctional EP materials, thus facilitating their high‐performance applications.

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Nonlinear static bending and dynamic behaviors of graphene platelets reinforced dielectric porous arches

Yang,

Wu,

Zhao

et al. 2023

Aerospace Science and Technology

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In situ reduction and self-alignment of reduced graphene oxide/poly(vinylidene fluoride) composite films: Toward high dielectric constant and suppressed loss

Cited by 7 publications

References 52 publications

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Heterostructured Graphene@Silica@Iron Phenylphosphinate for Fire‐Retardant, Strong, Thermally Conductive Yet Electrically Insulated Epoxy Nanocomposites

Nonlinear static bending and dynamic behaviors of graphene platelets reinforced dielectric porous arches

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In situ reduction and self-alignment of reduced graphene oxide/poly(vinylidene fluoride) composite films: Toward high dielectric constant and suppressed loss

Cited by 7 publications

References 52 publications

Three‐phase interfacial design in BaTiO3/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Three‐phase interfacial design in BaTiO3/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Heterostructured Graphene@Silica@Iron Phenylphosphinate for Fire‐Retardant, Strong, Thermally Conductive Yet Electrically Insulated Epoxy Nanocomposites

Nonlinear static bending and dynamic behaviors of graphene platelets reinforced dielectric porous arches

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Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties