Electromagnetic interference (EMI) shielding characteristics of carbon nanofiber-polystyrene composites were investigated in the frequency range of 12.4-18 GHz (Ku-band). It was observed that the shielding effectiveness of such composites was frequency independent, and increased with increasing carbon nanofiber loading within Ku-band. The experimental data exhibited that the shielding effectiveness of the polymer composite containing 20 wt% carbon nanofibers could reach more than 36 dB in the measured frequency region, indicating such composites can be applied to the potential EMI shielding materials. In addition, the results showed that the contribution of reflection to the EMI shielding effectiveness was much larger than that of absorption, implying the primary EMI shielding mechanism of such composites was reflection of electromagnetic radiation within Ku-band.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Electromagnetic Interference Shielding Effectiveness of Pure SiC-TiSiC Composites Fabricated by Reactive Melt Infiltration.
Materials (Basel)
January 2025
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.
Silicon carbide-based titanium silicon carbide (SiC-TiSiC) composites with low free alloy content and varying TiSiC contents are fabricated by two-step reactive melt infiltration (RMI) thorough complete reactions between carbon and TiSi alloy in SiC-C preforms obtained. The densities of SiC-C preform are tailored by the carbon morphology and volumetric shrinkage of slurry during the gel-casting process, and pure composites with variable TiSiC volume contents are successfully fabricated with different carbon contents of the preforms. Due to the increased TiSiC content in the obtained composites, both electrical conductivity and electromagnetic interference (EMI) shielding effectiveness improved progressively, while skin depth exhibited decreased consistently.
View Article and Find Full Text PDFUltrathin MWCNT/TiCT Hybrid Films for Electromagnetic Interference Shielding.
Nanomaterials (Basel)
December 2024
National Key Laboratory of Scattering and Radiation, Beijing 100854, China.
The disordered assembly and low conductivity of carbon nanotubes are the main problems that limit the application of electromagnetic interference (EMI) shielding. In this work, an ordered lamellar assembly structure of multiwalled carbon nanotube/TiCT (MWCNT/TiCT) hybrid films was achieved by vacuum-assisted filtration through the hybridization of TiCT nanosheets and carbon nanotubes, where carbon nanotubes were tightly sticking on the surface of TiCT nanosheets via physical adsorption and hydrogen bonding. Compared with the pure carbon nanotubes films, the hybrid MWCNT/TiCT films achieved a significant improvement in conductivity of 452.
View Article and Find Full Text PDFStructural, electrical and EMI shielding property of carbon nanotube decorated magnetic/ceramic nanoparticles.
Sci Rep
January 2025
Department of Physics, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
To protect against harmful electromagnetic interference (EMI), it is crucial to fabricate composite with high total electromagnetic shielding efficiency (SE); In this study, FeNi-NiFeO-SiO nanoparticles (NPs) were synthesized using one-pot method and decorated on carbon nanotube's (CNT) sidewall. The final product was magnetic-ceramic/conductive (FeNi-NiFeO-SiO/MWCNT) nanocomposite. The EMI shielding characteristic of FeNi-NiFeO-SiO NPs and FeNi-NiFeO-SiO/MWCNT nanocomposite was investigated in the range of X and Ku frequency band.
View Article and Find Full Text PDFIntercalation-Induced Interlayer and Defect Engineering in TiCT MXene for Ultralow-Reflection Electromagnetic Interference Shielding.
ACS Nano
January 2025
Henan Academy of Sciences, Zhengzhou 450046, China.
Interlayer and defect engineering significantly affects the electrical conductivity and electromagnetic interference (EMI) shielding of TiCT MXene. Previous studies have prioritized the size of the intercalant over its synergy with chemical affinity, limiting the elucidation of the intercalation mechanism and the precise control of the interlayer spacing (spacing). Herein, we synthesize MXene aerogels with a tunable spacing and defect density using a series of amine molecules of different sizes and chemical affinities as intercalants and cross-linkers.
View Article and Find Full Text PDFTiSquantum dots composite carbon nanotubes aerogel with electromagnetic interference shielding effect.
Nanotechnology
January 2025
Institute of Nonlinear Optics, College of Science, JiuJiang University, Jiangxi 334000, People's Republic of China.
Titanium disulfide quantum dots (TiSQDs) has garnered significant research interest due to its distinctive electronic and optical properties. However, the effectiveness of TiSQDs in electromagnetic interference (EMI) shielding is influenced by various factors, including their size, morphology, monodispersity, tunable bandgap, Stokes shift and interfacial effects. In this study, we propose a systematic approach for the synthesis of TiSQDs with small size (3.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!