The Effect of ZnO Nanoparticle Filler on the Attenuation of ZnO/PCL Nanocomposites Using Microstrip Line at Microwave Frequency

Yakubu, Abubakar; Abbas, Zulkifly; Esa, Fahmiruddin; Tohidi, P.

doi:10.3139/217.2993

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…Generally, the result confirms the increase in dielectric constant as filler content increases. This behaviour might be attributed to the compact and dense nature of the nano filler [7]. The decrease in dielectric constant as frequency increases can be attributed to the permittivity dispersion which is interfacial polarization [8].…”

Section: Dielectric Characterizationmentioning

confidence: 99%

Enhancing the Permittivity, Permeability and Morphology of Zno-PCL Nanocomposites via Nano Inclusion Treatment

Yakubu

Abba

Sahabi³

2019

Global J. Polym. Sci.

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This study involves an investigation to ascertain the effect of ZnO nano inclusion on the evolution and dielectric properties of ZnO-PCL nanocomposites. The effect of the nano inclusion towards attenuation of the composites is also reported. In this study, ZnO nano particles and polycaprolactone (PCL) were blended to form composites using melt blending technique. The composites were employed to study the effect of nano inclusion on the materials. Further analysis was done using FTIR to investigate the band positions and absorption peak of the prepared samples, SEM and EDX for the morphology and elemental composition of samples. The FTIR spectra indicated a strong interaction at the interface of the ZnO nano particles with the polymer matrix. Amongst other findings, it was confirmed that the dielectric constant increases as the ZnO nano content increases where the average values for the different compositions are 4.39, 4.14, 3.62, 3.31 and 3.21 from highest to lowest filler percentage respectively. The high dielectric properties of the composites makes it suitable for small microwave absorption devices

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Section: Dielectric Characterizationmentioning

confidence: 99%

Enhancing the Permittivity, Permeability and Morphology of Zno-PCL Nanocomposites via Nano Inclusion Treatment

Yakubu

Abba

Sahabi³

2019

Global J. Polym. Sci.

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“…The fringes of the field of reflection due to this material are used to calculate its transmission and reflection coefficients. The method of using transmission lines in measurement is for accuracy of results since microwave guides have field focusing ability [8]. For this study, sample is placed between two waveguides and excited with electromagnetic radiation.…”

Section: Methodsmentioning

confidence: 99%

Attenuation and Shielding Performance of Wood-Polymer Composites Synthesized via Melt-Blend Technique

Yakubu¹,

Abbas²,

Abdullahi³

2020

OALib

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In the recent, filler-polymer composites researches have been on the rise due to its implication to electromagnetic interference (EMI) applications. The composition, morphology and surface rheology of the filler-polymer composites play an immense role in determining the electrical, mechanical, and optical properties. In this paper, the preparation and characterization of micro-composites of wood (biodegradable waste material)/polycaprolactone (PCL) composites are reported. The micro-composites were prepared using melt blend technique via the solid state route. This method was selected because of its numerous advantages compared to other methods such as being easy, cheap with mass production of materials. To determine attenuation, rectangular waveguide (RWG) method was used. The magnitudes of the transmission coefficient (S 21) from the waveguide measurement were used to determine the attenuation of the wood-PCL composite substrate with respect to different percentages of wood filler. Result from the measurement showed amongst others that as the filler content increases, the attenuation increases. The highest magnitude for attenuation was calculated for the 62.5% wood-PCL composites with a value of −6.46 dB and the least attenuation was calculated for the 12.5% wood micro filler, which value gave −3.34 dB which is good for low shielding applications. Scanning electron microscope (SEM) was used to study the surface morphology of the samples.

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“…Polymer nanocomposite is a major factor in the design of novel advanced materials suitable for a variety of different applications, such as electrical engineering and high frequency devices like microwave especially to shielding applications. In the production of systems, polymers reinforcement using different types of organic or inorganic fillers is common practiced to improve mechanical, dielectric properties [1,2]. Properties of the polymer nanocomposites are affected by factors, like, intrinsic characteristics of each component, contact, shape and dimension of the fillers, and the nature of their interfaces [3].…”

Section: Introductionmentioning

confidence: 99%

Shielding Effectiveness, Mechanical and Dielectric Properties of NiO/PCL Nano Composites at Microwave Frequency for Electronic Devices

Yakubu

Abbas

Abdullahi

et al. 2021

PSIJ

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There is a continuous generation of electromagnetic fields through operations of electronic devices for this reason it is paramount that these fields be shielded so as to prevent interferences. The, conventional method for shielding these fields are by the use of thin metal foils or sheets. The metals foils are heavy, difficult to fabricate, costly and in many cases not suitable for use in many applications. For these reasons, this work is focused on using materials that is flexible, cost effective and durable, with considerable shielding effectiveness (SE). Hence, polycaprolactone (PCL) and nickel oxide (NiO) nanocomposite were synthesized using the conventional melt blending (CMB) technique. The synthesis method used is fast, easy and produces large mass of controlled composites within a short period. Rectangular waveguide, vector network analyzer, coaxial cable and open ended coaxial probe were used in the measurement of microwave properties. Measured scattering parameter was used to calculate the shielding effectiveness of the NiO/PCL composites. Findings indicates that the dielectric constant increased with increasing filler content, where the highest dielectric property was 5.09 for the 62.5 % filler and it was able to shield electromagnetic fields by up to -9.35 dB at the frequency range measured. The average particle size of the NiO nano particles was 40.5 nm using TEM analysis. The best hardness and tensile strength was recorded for the highest loading percentage. It is then concluded that the substrate produced can be tailored for electronic, telecommunication, medical applications and military shield applications.

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The Effect of ZnO Nanoparticle Filler on the Attenuation of ZnO/PCL Nanocomposites Using Microstrip Line at Microwave Frequency

Cited by 7 publications

References 8 publications

Enhancing the Permittivity, Permeability and Morphology of Zno-PCL Nanocomposites via Nano Inclusion Treatment

Enhancing the Permittivity, Permeability and Morphology of Zno-PCL Nanocomposites via Nano Inclusion Treatment

Attenuation and Shielding Performance of Wood-Polymer Composites Synthesized via Melt-Blend Technique

Shielding Effectiveness, Mechanical and Dielectric Properties of NiO/PCL Nano Composites at Microwave Frequency for Electronic Devices

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