Preparation of graphene/polypropylene composites with high dielectric constant and low dielectric loss <i>via</i> constructing a segregated graphene network

Han, Lijing; Wang, Hairui; Tang, Qi; Lang, Xiurui; Wang, Xuemeng; Zong, Yanbing; Zong, Cheng

doi:10.1039/d1ra06138k

Cited by 15 publications

(5 citation statements)

References 36 publications

(42 reference statements)

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“…We introduced conductive filler ARGO and dielectric ceramic BT simultaneously into PEI substrate. Firstly, the introduced ARGO nanosheets provided adequate polarization centers, as rGO 15,39 or CNTs [40][41][42] did, and contributed largely to the optimized dielectric constant. Secondly, BT nanoparticles enhanced the polarization of ARGO sheets and prevented the formation of leakage current brought by the contacts between ARGO sheets and further optimized the dielectric properties of the composites.…”

Section: Resultsmentioning

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: Resultsmentioning

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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“…Graphene has excellent electrical conductivity and can be used to modify polymers to prepare high dielectric composites. The common method is to disperse Graphite oxide in polymer solution and then reduce it [1][2][3]. The advantages are that the dispersion is more uniform, and higher dielectric properties can be obtained with less Graphene.…”

Section: Introductionmentioning

confidence: 99%

Study on thermal and dielectric performances of polyoxymethylene/thermoplastic polyurethane/multilayer graphene composites

song,

Deng,

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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Polyoxymethylene (POM)/thermoplastic polyurethane (TPU) / multilayer Graphene (MLGN) composites were prepared by mechanical processing using twin screw extrusion, and their thermal and dielectric performances were studied. The results show that MLGN can promote the decomposition of pure POM, but the thermal stability of POM can be greatly improved after adding TPU. MLGN has nucleation effect and can increase the crystallization temperature of POM. The heat distortion temperature of POM/TPU/MLGN composites increases with the increase of MLGN. The dielectric constant of POM/TPU/MLGN composites increase with the increase of the content of multilayer Graphene. At a content of about 9%, the dielectric constant of the composite material sharply increases, indicating the occurrence of a percolation channel. The dielectric constant of POM/TPU/MLGN composites is bigger and the dielectric loss factor is smaller at lower frequencies, and the dielectric constant is smaller and the dielectric loss factor is bigger at higher frequencies.

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“…Different reinforcement materials, some mostly preferred inorganic fillers, such as glass fiber (FG), carbon nanotubes, and clays are employed to enhance the properties of the PP polymer. To obtain a high-performance dielectric PP composite, it is reported that an increase in energy storage values is obtained using a blend of maleic anhydride grafted polypropylene (MAPP) and graphene oxide (12). After the increase in use of nanomaterials in the literature, the enhancement of mechanical properties was achieved using PP and 10% nano silica (13).…”

Section: Introductionmentioning

confidence: 99%

Study on Recycling of Waste Glass Fiber Reinforced Polypropylene Composites: Examination of Mechanical and Thermal Properties

SÖZEN

CEVAHİR²,

Deniz

2023

Journal of the Turkish Chemical Society Section A: Chemistry

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This study presents the preparation of short glass fiber reinforced polypropylene (PP/FG) composites using with waste (post-consumer) polypropylene composite containing long glass fiber (PP/LFG) obtained from the recycling of battery covers of trucks. Waste PP/LFG composite parts were mechanically grinded before adding to PP/FG composites. An injection molding machine was used to produce the PP/FG composite test samples loading with recycled waste PP/LFG composite in the range of 1-20% by weight. Effects of recycled waste PP/LFG content on the mechanical, thermal, and morphological properties of the PP/FG composites were investigated. The following three different tests, at various waste PP/LFG ratios, were conducted: Izod/Charpy Impact test, bending test, and tensile test. Mechanical test results showed that mechanical strength of prepared PP/FG composites were not influenced by content of waste PP/LFG material up to 10 wt.%. Differential scanning calorimetry (DSC) was used for the evaluation of thermal parameters such as melting point and crystallization temperature of the polymer matrix in the composites studied. Furthermore, by analyzing the values of thermal effects determined using the DSC method, it was possible to determine the degree of crystallinity. The DSC results showed that crystallinity %, melting, and crystallization temperatures of PP/FG composites were not influenced to adding waste PP/LFG at different ratios. The morphology of composite materials was investigated by SEM analysis. Good fiber dispersion was observed in the PP matrix for PP/FG composites containing short glass fiber prepared with all ratios of recycled waste PP/LFG material containing long glass fiber.

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Preparation of graphene/polypropylene composites with high dielectric constant and low dielectric loss via constructing a segregated graphene network

Abstract: The rGO/PP composites with high dielectric constant and low dielectric loss at a low filler content were prepared via constructing a segregated graphene network by encapsulating of GO on PP latex particles and the in situ reduction in GO.

Cited by 15 publications

References 36 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

Study on thermal and dielectric performances of polyoxymethylene/thermoplastic polyurethane/multilayer graphene composites

Study on Recycling of Waste Glass Fiber Reinforced Polypropylene Composites: Examination of Mechanical and Thermal Properties

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Preparation of graphene/polypropylene composites with high dielectric constant and low dielectric loss via constructing a segregated graphene network

Abstract: The rGO/PP composites with high dielectric constant and low dielectric loss at a low filler content were prepared via constructing a segregated graphene network by encapsulating of GO on PP latex particles and the in situ reduction in GO.

Cited by 15 publications

References 36 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

Study on thermal and dielectric performances of polyoxymethylene/thermoplastic polyurethane/multilayer graphene composites

Study on Recycling of Waste Glass Fiber Reinforced Polypropylene Composites: Examination of Mechanical and Thermal Properties

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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