Magnetic filler alignment of single graphene nanoplatelets modified by Fe3O4 to improve the thermal conductivity of the epoxy composite

Abbaspour, Seyed Foad; Kanvisi, Mojtaba

doi:10.1016/j.jiec.2023.02.010

Cited by 10 publications

(6 citation statements)

References 68 publications

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“…It is also characterized by low toxicity, ease of processing, cost-effectiveness, and controllable morphology. 14,15 Consequently, Triiron tetraoxide (Fe 3 O 4 ) stands out as an ideal filler for electromagnetic shielding materials. 16 The influence of Fe 3 O 4 fillers on nanocomposite properties has been extensively researched by Ramesan et al 17 They have synthesized nanocomposites of polyindole with Fe 3 O 4 by in situ chemical oxidative polymerization, fabricated iron oxide/ethylene vinyl acetate nanocomposites using an open mill-mixing technique, and created polyethylene-co-vinyl acetate/magnetite nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

“…Magnetite (Fe 3 O 4 ), the simplest form of ferrite, possesses high magnetic permeability and electrical resistivity. It is also characterized by low toxicity, ease of processing, cost‐effectiveness, and controllable morphology 14,15 . Consequently, Triiron tetraoxide (Fe 3 O 4 ) stands out as an ideal filler for electromagnetic shielding materials 16 .…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and investigation of graphene‐loaded triiron tetraoxide/silicone‐rubber electromagnetic shielding composites based on static magnetic‐field–induced orientation

Guo,

Zhou,

Xie

et al. 2024

Polymer Composites

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Graphene‐loaded triiron tetraoxide/silicone‐rubber composites containing highly loaded graphene‐loaded Fe3O4 (Fe3O4@RGO) particles were fabricated using static magnetic field‐induced alignment. The Fe3O4@RGO particles were characterized through Fourier transform infrared, x‐ray diffraction, SEM, and XPS analyses. Subsequently, the influence of added material and the strength of the magnetic field on the alignment distribution of the filler were examined through a synergistic combination of SEM and Raman spectroscopy. The electrical conductivity and electromagnetic shielding properties of the composites were assessed. The electrical conductivity of the composites increased with increasing filler addition, the 25 wt% filler mixture had the fastest curing rate and the maximum torque, and the continued increase in filler addition led to the occurrence of many defects. Concurrently, the alignment distribution of the filler progressively enhances with the augmentation of magnetic field strength. The composites synthesized at 180 mT exhibit the most substantial alignment, facilitating the establishment of effective conductive pathways. This results in a notable enhancement in electromagnetic shielding effectiveness, approximately 400% greater than that of pure silicone rubber and around 40% higher than that of non‐aligned composites. This approach introduces a novel concept for shaping the structural design of flexible electromagnetic shielding materials.Highlights Highly loaded Fe3O4@RGO was prepared by self‐assembly. The continuous phase structure of Fe3O4@RGO oriented was assessed. Fully oriented Fe3O4@RGO promotes the formation of conductive pathways. Fully oriented Fe3O4@RGO reduced the SER by 13% and increased the SEA by 67%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication and investigation of graphene‐loaded triiron tetraoxide/silicone‐rubber electromagnetic shielding composites based on static magnetic‐field–induced orientation

Guo,

Zhou,

Xie

et al. 2024

Polymer Composites

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“…Therefore, rational designs of the thermally conductive network for enhancing heat dissipation efficiency has received more and more attention. The use of specific processing techniques such as vacuum filtration [25,26], freeze casting [27,28], magnetic field orientation [29], and hot pressing [30] to promote the directional alignment of fillers is a common method for constructing ordered thermally conductive pathways. Among them, the freeze-casting method utilizes the directional growth of ice crystals to drive filler alignment in the freezing direction, resulting in a 3Doriented network structure.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Thermal Conductivity of Epoxy Composites via Constructing Oriented ZnO Nanowire-Decorated Carbon Fibers Networks

Lin,

Yu,

Sun

et al. 2024

Materials

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With the miniaturization and high integration of electronic devices, high-performance thermally conductive composites have received increasing attention. The construction of hierarchical structures is an effective strategy to reduce interfacial thermal resistance and enhance composite thermal conductivity. In this study, by decorating carbon fibers (CF) with needle-like ZnO nanowires, hierarchical hybrid fillers (CF@ZnO) were rationally designed and synthesized using the hydrothermal method, which was further used to construct oriented aligned filler networks via the simple freeze-casting process. Subsequently, epoxy (EP)-based composites were prepared using the vacuum impregnation method. Compared with the pure CF, the CF@ZnO hybrid fillers led to a significant increase in thermal conductivity, which was mainly due to the fact that the ZnO nanowires could act as bridging links between CF to increase more thermally conductive pathways, which in turn reduced interfacial thermal resistance. In addition, the introduction of CF@ZnO fillers was also beneficial in improving the thermal stability of the EP-based composites, which was favorable for practical thermal management applications.

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“…Typically, thermally conductive polymer-based composites are fabricated by dispersing high-thermal-conductive fillers, including carbon-based fillers, metals, and inorganic particles, into the polymer matrix. Carbon-based fillers include graphite, carbon fibers, graphene, and carbon nanotubes (CNTs), each of which shows high TC and excellent mechanical performance. − Particularly, graphite has excellent thermal and electrical conductivities, a high self-lubrication ability, resistance to both high and low temperatures, good corrosion resistance, and good chemical stability. Additionally, expanded graphite (EG) can be synthesized easily and affordably by reacting natural flake graphite with an interlaminar agent and then expanding the graphite sheets at a high temperature; this increases the specific surface area of the graphite sheets while retaining the above-mentioned advantageous properties of graphite.…”

Section: Introductionmentioning

confidence: 99%

Role of Copper Nanoparticles in the Thermal and Mechanical Properties of Expanded Graphite-Reinforced Epoxy Hybrids

Cheng,

Chu,

Jin

et al. 2024

ACS Omega

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Epoxy resin is extensively applied in the electronics and electrical fields because of its outstanding comprehensive performance. However, the low thermal conductivity (TC) limits its application in thermal interface materials. In the present work, epoxy-based hybrid composites with high TC were prepared by using expanded graphite (EG) and copper (Cu) nanoparticles as thermally conductive hybrid fillers via hot blending and compression-curing processes. Additionally, the influence of the Cu content on the thermal properties, mechanical properties, and morphology of each epoxy/EG/Cu composite was investigated. According to the results, the epoxy/EG/Cu composite showed a maximum TC of 9.74 W/(m·K) at a fixed EG content of 60 wt % owing to the addition of 10 wt % Cu. After the addition of 10 wt % Cu, the flexural strength, flexural modulus, and impact strengths of epoxy/EG/Cu composites were improved from 27.9 MPa, 9.72 GPa, and 0.81 kJ/m2 to 37.5 MPa, 10.88 GPa, and 0.91 kJ/m2, respectively. Hence, this study offers a feasible strategy for the design of epoxy hybrid composites with excellent TC that can be applied to thermal interface materials.

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Magnetic filler alignment of single graphene nanoplatelets modified by Fe3O4 to improve the thermal conductivity of the epoxy composite

Cited by 10 publications

References 68 publications

Fabrication and investigation of graphene‐loaded triiron tetraoxide/silicone‐rubber electromagnetic shielding composites based on static magnetic‐field–induced orientation

Fabrication and investigation of graphene‐loaded triiron tetraoxide/silicone‐rubber electromagnetic shielding composites based on static magnetic‐field–induced orientation

Enhancing the Thermal Conductivity of Epoxy Composites via Constructing Oriented ZnO Nanowire-Decorated Carbon Fibers Networks

Role of Copper Nanoparticles in the Thermal and Mechanical Properties of Expanded Graphite-Reinforced Epoxy Hybrids

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