Graphene/carbonyl iron powder composite microspheres enhance electromagnetic absorption of 3D printing composites

Ye, Xicong; Gao, Qi; He, Enyi; Yang, Chao; Yang, Peng; Yan, Tangming; Ye, Yongsheng; Wu, Haihua

doi:10.1016/j.jallcom.2022.168443

Cited by 31 publications

(6 citation statements)

References 51 publications

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“…The interaction between these materials, facilitated by the presence of polar groups, leads to a significant interfacial area and the accumulation of charges at the interface. This interfacial polarization results in a higher dielectric constant, suggesting improved electrical performance in the composites [12]. It is worth noting that the dielectric constant decreases as the frequency increases, indicating a diminishing effect of interfacial polarization at higher frequencies.…”

Section: Electrical Properties Of Pla-carbon Compositementioning

confidence: 94%

Dielectric And Mechanical Properties Of PLA-Carbon Composites

Mathanesh Thangarajan,

Cheow Keat Yeoh,

Pei Leng Teh

et al. 2024

IJNeaM

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This study focuses on the development and characterization of Carbon-based Polylactide (PLA) composites for 3D printer filaments. The aim is to enhance the electrical and mechanical properties of PLA by incorporating recovered carbon black (RCB) in different mesh sizes (500, 1000, 1500, and 2000 mesh). Electrical impedance spectroscopy and dielectric constant measurements were performed to investigate the electrical properties of the composites. Results showed that the addition of RCB increased the dielectric constant, with values ranging from 2.5 to 7.1, indicating improved electrical performance. Scanning electron microscopy (SEM) analysis revealed the dispersion of carbon particles within the composites, enhancing their electrical conductivity. The effect of RCB particle size on electrical properties was also explored, with smaller particle sizes (2000 mesh) resulting in the highest conductivity of 6.2 S/m. Tensile testing demonstrated that the addition of RCB increases the tensile strength of PLA, with values ranging from 28.6 MPa to 47.2 MPa, and the elastic modulus, ranging from 832 MPa to 1.56 GPa, depending on the mesh size. The optimal combination of RCB content and mesh size resulted in a composite with a tensile strength of 43.8 MPa. Overall, this research provides insights into the development of Carbon-based PLA composites with improved electrical and mechanical properties.

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Section: Electrical Properties Of Pla-carbon Compositementioning

confidence: 94%

Dielectric And Mechanical Properties Of PLA-Carbon Composites

Mathanesh Thangarajan,

Cheow Keat Yeoh,

Pei Leng Teh

et al. 2024

IJNeaM

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“…Zuo et al developed a multi-material bilayer absorbing composites consisting of graphene/Li 0.35 Zn 0.3 Fe 2.35 O 4 /PMMA as the matching layer and CIG/PMMA as the absorption layer via multi-material DLP, achieving a minimum reflection loss of −46.1 dB at 4.7 GHz and an effective absorption bandwidth of 3.5 GHz (4.15–5.35 and 14.7–17.0 GHz) [ 215 ]. The ball-milled CIG reinforced PLA for FDM printing of nanocomposites resulted in a minimum reflection loss of 50.1 dB and an absorption bandwidth of 6.0 GHz at a sample thickness of 2.2 mm [ 216 ]. Ye et al fabricated a FeSiAl/PLA and FeSiAl-MoS 2 -graphene/PLA double-layer absorber with effectively improved impedance matching using FDM technology [ 217 ].…”

Section: Multifunctional Applications Of 3d Printed Graphene and Grap...mentioning

confidence: 99%

3D Printed Graphene and Graphene/Polymer Composites for Multifunctional Applications

Wu,

An,

Guo

2023

Materials

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Three-dimensional (3D) printing, alternatively known as additive manufacturing, is a transformative technology enabling precise, customized, and efficient manufacturing of components with complex structures. It revolutionizes traditional processes, allowing rapid prototyping, cost-effective production, and intricate designs. The 3D printed graphene-based materials combine graphene’s exceptional properties with additive manufacturing’s versatility, offering precise control over intricate structures with enhanced functionalities. To gain comprehensive insights into the development of 3D printed graphene and graphene/polymer composites, this review delves into their intricate fabrication methods, unique structural attributes, and multifaceted applications across various domains. Recent advances in printable materials, apparatus characteristics, and printed structures of typical 3D printing techniques for graphene and graphene/polymer composites are addressed, including extrusion methods (direct ink writing and fused deposition modeling), photopolymerization strategies (stereolithography and digital light processing) and powder-based techniques. Multifunctional applications in energy storage, physical sensor, stretchable conductor, electromagnetic interference shielding and wave absorption, as well as bio-applications are highlighted. Despite significant advancements in 3D printed graphene and its polymer composites, innovative studies are still necessary to fully unlock their inherent capabilities.

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“…Typical insulation materials include common plastic polymers (PVC [14], PE [15], etc. ), traditional resins (epoxy resins [16]), quartz glass (silica [17]) and so on. Among them, the simple structure of silicon dioxide (SiO2) is not only lightweight, but also has a mature preparation process and a wide range of applications.…”

Section: Introductionmentioning

confidence: 99%

Adjusting N-doping to balance conductivity and polarization for superb electromagnetic wave absorption properties of SiO2

Liu

et al. 2023

Preprint

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Due to its low relative permittivity and basically non-electromagnetic loss characteristics, SiO2, a typical electrical insulator, is frequently employed as a wave-transparent material. Hence, using SiO2 as a wave-absorbing material is a novel concept. In this study, a composite (SiO2-Nx) was created using a one-step solvothermal process, doped with N atoms and bound by Si-N bonds. Based on SiO2's imbalanced polarization ability, this research modifies the material's conductivity loss by doping it with N, which successfully balances the polarization and conductivity and turns SiO2-Nx into a wave-absorbing material. The resulting SiO2-N4 composite has a low matched thickness and a wide absorption band of 5.28 GHz with a minimum reflection loss value of -34.48 dB (2.5 mm). The addition of doped-N atoms, which on the one hand improves the impedance matching properties of SiO2-Nx, results in the balanced polarization relaxation and conductivity. The two dielectric loss mechanisms of polarization and conductivity loss, on the other hand, are enhanced to varying degrees by N-doping, which completes the improvement of the wave absorption capability. These outstanding findings offer original suggestions for the creation of SiO2-based electromagnetic wave absorption materials.

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Graphene/carbonyl iron powder composite microspheres enhance electromagnetic absorption of 3D printing composites

Cited by 31 publications

References 51 publications

Dielectric And Mechanical Properties Of PLA-Carbon Composites

Dielectric And Mechanical Properties Of PLA-Carbon Composites

3D Printed Graphene and Graphene/Polymer Composites for Multifunctional Applications

Adjusting N-doping to balance conductivity and polarization for superb electromagnetic wave absorption properties of SiO2

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