Materials Circular Economy, Journal Year: 2024, Volume and Issue: 6(1)
Published: May 4, 2024
Language: Английский
Polymer Composites, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 6, 2025
Abstract The integration of 5G technology with advanced electronic devices has intensified electromagnetic pollution concerns, necessitating materials capable mitigating interference (EMI). This spurred the development sustainable alternatives, surpassing conventional synthetic and ferrite materials. Natural fibers, when combined nanomaterials, exhibit unique properties suitable for EMI shielding. Sugarcane bagasse fiber (SBF), in conjunction nanofillers such as reduced graphene oxide (rGO), provides a sustainable, lightweight, eco‐friendly solution absorbing waves. study explores effects SBF particle size rGO on dielectric microwave absorption properties. Experimental findings highlight that EPSB 150 @1%rGO composite (150 μm 1 wt% rGO) achieved maximum constant (ε′) 6.62 at 8 GHz, outperforming EPSB@1%rGO (ε′ = 5.45), indicating enhanced charge storage. loss (ε″) peaked 0.41 EPSB@1%rGO, reflecting superior energy dissipation from interfacial polarization. Reflection (RL) calculations revealed improved −20.07 dB 12.4 GHz @1%rGO, compared to −15 signifying effective EM wave attenuation. These results demonstrate incorporation significantly enhances properties, establishing these composites promising candidates shielding stealth technologies. Highlights raises pollution, needing forms composite. max ε′ composites. high @1% boost absorption.
Language: Английский
Citations
0
Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)
Published: March 10, 2025
The accumulation of polyurethane (PU) waste presents a critical environmental challenge due to the inefficiencies traditional disposal methods like landfilling and incineration. This study introduces sustainable approach by repurposing 99.89% pure rigid foam granules (~ 150 µm) as fillers (5 wt.%) in bio-epoxy composites, complemented with vermiculite particles 10 at varying concentrations (2-10 wt.%). Comprehensive characterization techniques, including high-resolution scanning electron microscopy (HR-SEM) Fourier transform infrared spectroscopy (FTIR), were employed evaluate composites' mechanical, thermal, electrical, acoustic, electromagnetic interference (EMI) shielding properties. specifically measured EMI effectiveness frequency range 8-12 GHz. Among formulations, sample S5 exhibited superior mechanical performance, tensile strength (10.47 N/mm2), impact (0.006 kJ/cm2), flexural (46.80 N/mm2). analysis revealed dielectric constant 1.111 -35.24 dB, while S3 achieved optimal acoustic absorption (NRC 0.295). Thermal assessments showed lowest thermal conductivity (0.141 W/mK) reduced burning rate (6.8 mm/min) for S5. These results highlight viability recycled PU foam-based composites minimizing plastic advancing net-zero carbon emission goals. Potential applications include battery enclosures, engine bay insulation, cabin soundproofing electric vehicles. work establishes novelty integrating materials into matrices address challenges create high-performance composites.
Language: Английский
Citations
0
Polymer Composites, Journal Year: 2025, Volume and Issue: unknown
Published: April 1, 2025
Abstract The localized heat accumulation in electronic components not only restricts the further miniaturization and integration of devices but also severely impacts their performance longevity. This thesis develops a high‐temperature‐resistant, insulating, thermally conductive composite material, which can be applied fields such as encapsulation materials flexible copper clad laminate substrate materials. Boron nitride nanosheets (BNNS) are utilized both nucleating agents thermal additives. dual‐role approach synergistically enhances electrical properties. Results show that out‐of‐plane conductivity (λ ⊥ ) crystallized poly(aryl ether nitrile) (PEN) reaches 0.255 W/(m K), 54.55% increase over untreated PEN. Furthermore, BNNS‐filled PEN exhibits an λ 0.831 representing significant 403.64% enhancement. demonstrates improved overall performance, including dielectric breakdown strength 249.59 kV/mm, expansion coefficient 18.03 ppm/°C, elevated glass transition temperature 209.5°C, decomposition 441.3°C. Highlights BNNS plays roles nucleation agent heat‐conductive filler. increases by compared to pure film. Thermal through regulation condensed matter structure.
Language: Английский
Citations
0
Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Language: Английский
Citations
3
E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 511, P. 01016 - 01016
Published: Jan. 1, 2024
This research explores the custom-made design of nanomaterial designs to improve mechanical and thermal properties polypropylene (PP) framework nanocomposites. Functionalized multiwalled carbon nanotubes (f-MWCNTs) polyvinylpyrrolidone-modified nano-silica (PVP-SiO2) were deliberately consolidated into PP matrix, illustrating improved scattering interaction at atomic level. Morphological examination uncovered a uniform dissemination nanofillers, driving upgrade properties. Tensile tests illustrated dynamic increment in Young’s Modulus Strength with higher concentrations especially definitions NC3 NC4. Thermal analysis, counting differential checking calorimetry (DSC) thermogravimetric analysis (TGA), demonstrated hoisted glass move temperatures upgraded warm solidness. Comparative execution related works highlighted special commitments this ponder, emphasizing green activities, sustainability, progressions multifunctionality. The nanocomposites display promising results, appearing 2.5 GPa 35 MPa, whereas NC4 accomplished 3.0 Quality 40 MPa. These discoveries emphasize potential tailored models for creating high-performance environmentally capable polymer network
Language: Английский
Citations
2
Polymer-Plastics Technology and Materials, Journal Year: 2024, Volume and Issue: 63(14), P. 1874 - 1886
Published: June 8, 2024
Metal oxide-infused polymer composites with higher dielectric constants are emerging as compelling solutions for effective Electromagnetic Interference shielding (EMIS) applications. In this work, hybrid blends were made of polyoxy methane (POM) and polyvinyl alcohol (PVA), using the conventional solution casting method. This study investigated properties blend by adding different concentrations (1 to 4 wt.%) titanium dioxide (TiO2) nanofillers that synthesized via combustion technique egg albumen. It is evident from crystallite size TiO2 nanoparticles albumen not only acted a fuel but also capping agent in preventing agglomeration particles thereby controlling size. Increased nanofiller decreased crystallinity blend. The composite 3 wt.% exhibits highest constant (1385) electromagnetic effectiveness. Further, developed nanocomposites exhibit excellent effectiveness frequency range 8 12 GHz. uniqueness lies cost-effective preparation very less concentration nanoparticles. These nanocomposite films could be potential replacement infused carbon black, multiwalled nanotubes, graphene oxide nickel nanofillers, etc.
Language: Английский
Citations
2
Frontiers in Materials, Journal Year: 2024, Volume and Issue: 11
Published: July 25, 2024
In high-speed microelectronic communication, efficient and reliable radome-enclosed antenna performance is highly desired, which depends on consistent dielectric, mechanical properties, low moisture absorption. The purpose of this study to investigate the dielectric properties fiber-polymer matrix composite (PMC) radome over wideband frequency impact environmental aging its performance. constant (Ɛ r ) SF/E 0.8 (80% fiber loading) material decreased 4% from original value (3.93), loss (δ) was reduced by 11% 0.035 (2–18 GHz), while SEM morphology indicated fair interface bonding. Employing Hallberg Peck model, equivalent time (5–25 years), upon accelerated aging, Ɛ increased up 3.69%, δ 9.68%, uptake in 1.13% 1.67%, tensile strength retained 90.62% (147.83 MPa), compression 93.56% (388.54 flexural 85.44% (286.77 interlaminar shear 77.66% (22.03 respectively. gain 1%, voltage standing wave ratio (VSWR) 1.04% their values. This gradual small deviation x electrical extended referred as effective for applications.
Language: Английский
Citations
2
Materials Circular Economy, Journal Year: 2024, Volume and Issue: 6(1)
Published: May 4, 2024
Language: Английский
Citations
1