Additive manufacturing, Journal Year: 2024, Volume and Issue: unknown, P. 104593 - 104593
Published: Dec. 1, 2024
Language: Английский
Journal of Vinyl and Additive Technology, Journal Year: 2024, Volume and Issue: 30(6), P. 1545 - 1555
Published: Aug. 21, 2024
Abstract This study investigates the electromagnetic interference (EMI) shielding behavior of a flexible polyvinyl alcohol (PVA) composite fabricated using betel nut husk biocarbon and steel microwire in E, F, I, J band spectrum. The incorporation into PVA based is novel approach since it provides flexibility along with good mechanical strength. fabrication process involves solution casting method, characterized according to American society testing materials (ASTM) standards. research focuses on analyzing dielectric behavior, EMI effectiveness, properties. Results indicates that, 5 vol.% micro metal wire, exhibits exceptional relative permittivity 7.6, 6.9, 6.3, 1.5 for frequency bands same composition delivers total values 17.7 dB, 25.5 31.7 38.6 dB bands. In characteristics, high tensile strength 73 MPa lower elongation percentage 109.2% shore‐D hardness 40, respectively. Thus, inclusion matrix enhanced overall properties These composites could be used applications such as defense, telecommunication, drones, electronic gadget making segments. Highlights Flexible made biocarbon. Biocarbon derived from first time EM wave absorber. Composites were via simple method index. Composite contains shows 7.6 E have low 40.
Language: Английский
Citations
2
Journal of Nanotechnology, Journal Year: 2024, Volume and Issue: 2024(1)
Published: Jan. 1, 2024
Terahertz (THz)‐integrated technology experienced explosive growth and shows excellent potential across many industries. Hence, developing shielding materials is crucial to safeguard waveguides sensitive devices from unwanted external electromagnetic sources. To date, there a gap in current research regarding the conclusive use of maghemite nanoparticle ( γ −Fe 2 O 3 NP) as an effective nanofiller for THz‐shielding material while utilizing inherent properties graphene nanosheets (GNS) create hybrid polymer nanocomposite. Therefore, first time, this study developed novel /GNS nanocomposite assessing role nanoparticles applications. A one‐step direct chemical exfoliation method synthesized GNS. On other hand, straightforward thermal decomposition NP. The nanomaterials were then loaded poly (methyl methacrylate) (PMMA), with different ratios NP (w% = 0, 5, 10, 15) fabricate thin films by evaporative casting technique. scanning electron microscopy results elemental dispersive X‐ray (SEM‐EDX) display morphological traits GNS loosely stacked flat‐shaped sheets. has predominantly homogeneous spherical‐shaped morphology measuring 30–60 nm. At same retained some distinct features matrix localized clusters magnetic nanoparticles. Results diffraction (XRD) analysis complemented SEM ATR‐FTIR analysis, supporting existence pure Furthermore, time‐domain spectroscopy (TDS) analyzes THz interference‐shielding effectiveness (EMI‐SE) at 0.6–1.6 15% , revealing SE ≤20 dB (99.00% wave attenuation) calculated specific (SSE) ∼30 dB∗cm /g. These demonstrated improved introducing additive filler. Conclusively, fabricated nanocomposites considered facile, effective, comparable EMI‐shielding materials.
Language: Английский
Citations
2
Biomass Conversion and Biorefinery, Journal Year: 2023, Volume and Issue: 14(18), P. 21719 - 21727
Published: May 29, 2023
Language: Английский
Citations
4
Crystals, Journal Year: 2023, Volume and Issue: 14(1), P. 22 - 22
Published: Dec. 25, 2023
Achieving perfect absorption of electromagnetic waves across a wide range frequencies is crucial for various applications, including sensing, imaging, and energy capture. In this study, we introduced new concept metasurfaces proposed six-layer vertically structured IGIGIM metasurface consisting gold (Au), silicon (Si), graphene (G1), silica (SiO2), second layer (G2), polymethyl methacrylate (PMMA), which demonstrates ultra-wideband absorptance in the terahertz (THz) region. Through theoretical analysis numerical simulations, obtained broadband over 80% with average 92.6% bandwidth 8.22 THz, from 1.78 to 10.0 THz. Whereas, dual was above 90% 5.63 THz two sub-bands 2.09–3.5 5.78–10 95% 3.63 2.32–3.12 6.35–9.9 Moreover, structure exhibits polarization-independent property. Also, it tolerance incident angle 40 degrees, maintaining band. This remarkable feature attributed multiple Fabry–Pérot resonance absorptions structure. Our study presents convenient method designing high-quality wave absorbers outstanding absorptance.
Language: Английский
Citations
4
Applied Surface Science, Journal Year: 2024, Volume and Issue: unknown, P. 161307 - 161307
Published: Sept. 1, 2024
Language: Английский
Citations
1
Applied Surface Science, Journal Year: 2024, Volume and Issue: 682, P. 161698 - 161698
Published: Nov. 4, 2024
Language: Английский
Citations
1
Journal of Materiomics, Journal Year: 2024, Volume and Issue: 11(2), P. 100863 - 100863
Published: April 16, 2024
Creating porous structures and gradient are two commonly used design strategies for terahertz (THz) absorption enhancement. However, the synergistic effect of structure on THz still remains less explored. Here, we took an almost non-conductive carbon foam as raw material, fabricated integrated (PCF) by microwave selective sintering. The experimental results show that resulted in a 140% improvement performance. Specifically, excellent average intensity –38.8 dB (absorptivity is about 99.99%) obtained frequency range from 0.5–4.0 THz. COMSOL simulation transmission line model were applied to explore formation mechanism loss capabilities structure. This work not only reveals enhancement absorption, but also provides new insights into high-performance absorbers future.
Language: Английский
Citations
1
Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(40), P. 21817 - 21827
Published: Jan. 1, 2023
The entire world has been reshaped with the development of wireless communication.
Language: Английский
Citations
3
Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 17
Published: Jan. 1, 2024
Language: Английский
Citations
0
Additive manufacturing, Journal Year: 2024, Volume and Issue: unknown, P. 104593 - 104593
Published: Dec. 1, 2024
Language: Английский
Citations
0