Synthesis, thermal, dielectric, and microwave reflection loss properties of nickel oxide filler with natural fiber‐reinforced polymer composite

Ahmad, Ahmad F.; Abbas, Zulkifly; Shaari, Abdul Halim; Obaiys, Suzan Jabbar; Aliyu, Umar Sa’ad

doi:10.1002/app.46998

Cited by 12 publications

(8 citation statements)

References 46 publications

(45 reference statements)

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“…At lower loadings of MWCNTs, frequency has little effect on both the real and imaginary parts of the permittivity, but the significant decrease is observed at higher loadings, e.g., in sample 3.2% MWCNTs and 4% MWCNTs. The effect of frequency on permittivity is directly related to polarization, i.e., as the frequency of the field is raised, the periodic reversal of electric field occurs so quickly that there is no excess ion diffusion in the field direction [33]. Hence, polarization due to charge accumulation decreases, which leads to a decrease in the permittivity value with increasing frequency [34].…”

Section: Dielectric Properties Of Mwcnt/pla/peg Nanocompositesmentioning

confidence: 99%

Biodegradable Poly (lactic acid)/Poly (ethylene glycol) Reinforced Multi-Walled Carbon Nanotube Nanocomposite Fabrication, Characterization, Properties, and Applications

et al. 2020

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This paper presents the electromagnetic interference properties of multi-walled carbon nanotubes (MWCNTs) as a novel nano-reinforcement filler in poly (lactic acid) (PLA)/poly (ethylene glycol) (PEG) polymer matrix that was prepared via melt blending mode. Plasticization of PLA was first carried out by PEG, which overcomes its brittleness problem, in order to enhance its flexibility. A waveguide adapter technique was used to measure the dielectric properties ε r , and S-parameters reflection (S11) and transmission (S21) coefficients. The dielectric properties, microwave attenuation performances, and electromagnetic interference shielding effectiveness (EMISE) for all the material under test have been calculated over the full X-Band (8–12 GHz) due to its importance for military and commercial applications. The prepared samples were studied while using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transforms infrared spectroscopy (FTIR), mechanical properties measurements, as well as thermogravimetric analysis (TGA). The results showed that the dielectric properties increased with increased multi-walled carbon nanotubes (MWCNTs) filler, as well as the shielding effectiveness of the MWCNT/PLA/PEG nanocomposites increased with the increasing of MWCNTs. The highest SE total value was found to be 42.07 dB at 12 GHz for 4 wt.% filler content. It is also observed that the attenuation values of the nanocomposites increased with an increase in MWCNTs loading, as well as the power loss values for all of the samples increased with the increase in MWCNTs loading, except the amount of the transmitted wave through the nanocomposites.

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Section: Dielectric Properties Of Mwcnt/pla/peg Nanocompositesmentioning

confidence: 99%

Biodegradable Poly (lactic acid)/Poly (ethylene glycol) Reinforced Multi-Walled Carbon Nanotube Nanocomposite Fabrication, Characterization, Properties, and Applications

et al. 2020

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“…1. XRD result study is used for identification of amorphous nature and crystalline phase presences in samples [22]. The patterns in Fig.…”

Section: Resultsmentioning

confidence: 99%

Structural, elastic and thermo-physical properties of Er2O3 nanoparticles doped bio-silicate borotellurite glasses

et al. 2020

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This paper presents a study on the structural, morphological and elastic properties of erbium oxide nanoparticles doped bio-silicate borotellurite glass system fabricated using the technique of melt-quenching with chemical compositional formula {[(TeO 2 ) 0.7 (B 2 O 3 ) 0.3 ] 0.8 (SiO 2 ) 0.2 } 1−y (Er 2 O 3 NPs) y where 0.01 ≤ y ≤ 0.05. The objective of the work was to study the some elastic and thermal parameters associated with non-destructive ultrasonic technique, with the aim of utilizing the glasses for erbium doped fiber amplifier application. Various measurements and Characterizations techniques which includes density and molar volume measurements, energy dispersive X-ray fluorescence, X-ray diffraction (XRD), Fourier transform infrared (FTIR), Transmission electron microscopy and Pulse-echo technique were carried out in this study. The density values for the glasses increased from 4.1900 to 4.6003 gcm −3 with the addition of 1-5% of Er 2 O 3 NPs in the glass structure. The increase can be ascribed to increase in the overall molar weight of the glass due to incorporation of heavy Er 3+ ions. The XRD patterns revealed no presence of sharp peaks with the observed broad hump around 2θ = 20-30° indicating the glassy and amorphous nature of the studied glasses. The FTIR spectra showed absorption with peaks around 1362-1385 cm −1 , 1221-1250 cm −1 , 655-689 cm −1 and 602-630 cm −1 wave number ranges, indicating the presences of H 3 BO 3 , SiO 4 , BO 3 , TeO 3 and TeO 4 structural units in the glass system. The microstructural nature observed in the glass morphology showed nanoparticle agglomerations in the glasses. The ultrasonic velocities, elastic moduli, microhardness, Poisson ratio, softening and Debye's temperatures, thermal expansion coefficient as well as other important parameters were calculated from the density and ultrasonic data. The values of the ultrasonic velocities, elastic moduli, Debye's temperature, softening temperature, thermal expansion coefficient and the acoustic impedance increased with increase in the Er 2 O 3 NPs concentration.

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“…On the other hand, there is several characteristic peak positions appear for NiO at 2θ = 79.38°, 75.20°, 62.87°, 43.20°, and 37.20° corresponding’s to (222), (311), (220), (200), and (111) respectively. The XRD data for nickel oxide shows a strong and sharp diffraction peak and the absence of diffraction halo in the recorded XRD pattern indicates the presence of crystalline phase only and the lack of any amorphous or crystalline-amorphous phase formation, respectively [ 23 ]. The XRD data for OPEFB/NiO/PCL composites show the intensity of the peaks from the amorphous and crystalline components, where many small peaks have been observed throughout the angles for the XRD patterns of the composites at different compositions.…”

Section: Resultsmentioning

confidence: 99%

“…From the results, the crystallinity of the materials has been increased after NiO added. This leads to changing dramatically and controlling the dielectric properties of the composites by manipulating the filler ratio [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

“…Polycaprolactone (PCL) was chosen in this study due to having a high level of flexibility, attractive mechanical properties, lightweight, good dielectric properties, and ability to be easily fabricated and blended [ 21 , 22 ]. In our previous work [ 23 ], we prepared and characterized bio-composite consists of OPEFF as a filler hosted in PCL polymer as a matrix. Both real and imaginary relative permittivity values of the samples were measured, it is found that the dielectric properties of the composites were affected by the change in the OPEFF filler percentage at composites in the matrix of the composite.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of Semi-Flexible Substrates from Natural Fiber/Nickel Oxide/Polycaprolactone Composite for Microstrip Patch Antenna Circuitries for Microwave Applications

et al. 2020

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The study intended to utilizing waste organic fiber for low-cost semi-flexible substrate fabrication to develop microstrip patch antennas for low band communication applications. All the semi-flexible substrates (12.2 wt. % OPEFF/87.8 wt. % PCL, 12.2 wt. % NiO/87.8 wt. % PCL, and 25 wt. % OPEFF/25 wt. % NiO/50 wt. % PCL) were fabricated by oil palm empty fruit fiber (OPEFF) mixed with nickel oxide (NiO) nanoparticles reinforced with polycaprolactone (PCL) as a matrix using a Thermo Haake blending machine. The morphology and crystalized structure of the substrates were tested using Fourier transform infrared (FTIR) spectrometry, X-ray diffraction (X-RD) technique, and scanning electron microscopy (SEM), respectively. The thermal stability behavior of the substrates was analyzed using thermogravimetric analysis (TGA) and differential thermogravimetric (DTG) thermogram. The dielectric properties were characterized by an open-ended coaxial probe (OEC) connected with Agilent N5230A PNA-L Network Analyzer included the 85070E2 dielectric software at frequency range of 8 to 12 GHz. The experimental results showed that NiO/OPEFF/PCL composites exhibit controllable permittivity dielectric constant εr′(f) between 1.89 and 4.2 (Farad/meter, (F/m)), with loss factor εr′′(f) between 0.08 and 0.62 F/m, and loss tangent (tan δ) between 0.05 and 0.18. Return losses measurement of the three patch antennas OPEFF/PCL, NiO/PCL, and OPEFF/NiO/PCL are −11.93, −14.2 and −16.3 dB respectively. Finally, the commercial software package, Computer Simulation Technology Microwave Studio (CSTMWS), was used to investigate the antenna performance by simulate S-parameters based on the measured dielectric parameters. A negligible difference is found between the measured and simulated results. Finally, the results obtained encourage the possibility of using natural fibers and nickel oxide in preparation of the substrates utilize at microwave applications.

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Synthesis, thermal, dielectric, and microwave reflection loss properties of nickel oxide filler with natural fiber‐reinforced polymer composite

Cited by 12 publications

References 46 publications

Biodegradable Poly (lactic acid)/Poly (ethylene glycol) Reinforced Multi-Walled Carbon Nanotube Nanocomposite Fabrication, Characterization, Properties, and Applications

Biodegradable Poly (lactic acid)/Poly (ethylene glycol) Reinforced Multi-Walled Carbon Nanotube Nanocomposite Fabrication, Characterization, Properties, and Applications

Structural, elastic and thermo-physical properties of Er2O3 nanoparticles doped bio-silicate borotellurite glasses

Preparation and Characterization of Semi-Flexible Substrates from Natural Fiber/Nickel Oxide/Polycaprolactone Composite for Microstrip Patch Antenna Circuitries for Microwave Applications

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