Mechanical, Dielectric and Shielding Performance of Rice Husk/Polycaprolactone Composites Enhanced via Rice Husk Particles Inclusion

Yakubu, Abubakar; Abbas, Zulkifly; Abdullahi, Sirajo

doi:10.4236/oalib.1106514

Cited by 5 publications

(6 citation statements)

References 13 publications

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“…The result of rice husk-specific gravity presented in Table 3 shows a specific gravity of 0.26, which is lower than the 0.600-1.2 range reported by Bashir and Haripriya (2016). However, based on a study by (Yakubu et al, 2020;Bishtet et al, 2020), the specific gravity of a substance increases with increasing particle size. Because there are more particles in the rice husk ash than in normal rice husk, the specific gravity of the rice husk ash is lower than that of traditional rice husk, which accounts for the greater specific gravity of the outcome.…”

Section: Rice Husk-specific Gravitymentioning

confidence: 66%

“…The rice husk particle size distribution graph is shown in Figure 4 However, the zoning and classifications are based on the soil classification system to ascertain the level of fineness in the RH sample. Except for the physical characteristics of water absorption, this may, nevertheless, improve the mechanical qualities of RH (Yakubu et al, 2020). According to Bisht et al (2020), the larger the particle sizes the more void will be in the material and the lower the bulk density.…”

Section: Particle Size Distribution Of Rice Huskmentioning

confidence: 99%

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Performance Characterisation of Gum Arabic Bonded Particle Board Made From Rice Husk and Candle Wax

Raymond,

Ndububa

2023

OJES

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Particle boards from wood sources have negative impacts on the environment through deforestation. Binders from synthetic sources are also not economical due to high costs in some parts of the world. Agricultural waste materials like rice husk (RH) and readily available natural binders like gum Arabic (GA) are proposed as alternative component materials in particle board manufacture. This study therefore investigates the engineering performance of gum Arabic bonded particle board made from rice husk and candle wax. RH was kept at a constant 70% in the mixture, CW and GA were alternated at 0/30%, 5/25%, 10/20%, 15/15%, 20/10%, and 25/5 % respectively. The mixture was passed through cold and hot presses with compressions to produce particle board samples. The samples were micro-characterised using scanning electron microscopy (SEM) and Energy-dispersive spectroscopy (EDS). The Gum arabic bonded particle board were subjected to various engineering tests. The SEM results showed poor compaction of the material especially as CW content increased. The EDS results showed that caron and silica constituted about 75% of the matrix indicating free of toxic substances. The maximum compressive, flexural and split tensile strengths were 3.88, 0.33 and 1.90 N/mm2 respectively at 10/20% mix even with the lowest density of 565.29 kg/m3. The water absorption and swelling in thickness decreased significantly with increase of CW with values of 2.72 and 0.00% at 25/5 %. The boards may be classified as medium-density since the densities were above 560Kg/m3.

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Section: Rice Husk-specific Gravitymentioning

confidence: 66%

Section: Particle Size Distribution Of Rice Huskmentioning

confidence: 99%

Performance Characterisation of Gum Arabic Bonded Particle Board Made From Rice Husk and Candle Wax

Raymond,

Ndububa

2023

OJES

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“…Most researchers have reported the use of ferrites with fibers of oil palm and other materials [4]. Agricultural residue that are biodegradable, eco-friendly and cost effective can be used to fabricate microwave absorbers [5].…”

Section: Introductionmentioning

confidence: 99%

Microwave Absorption Properties of Unripe Plantain Husk, Polycaprolactone and Charcoal Powder Hybrid Nanocomposites Using Numerical Simulation at X-Band Frequency

Yakubu¹

2021

JANSET

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Single bulk materials have lesser advantages compared to nano materials in the area of mechanical, electrical, dielectric, optical and thermal properties enhancement of polymer and hybrid of bio-composites. In this work, charcoal (CH), unripe plantain husk (UPH), and polycaprolactone (PCL) based microwave absorber were synthesized using both mechanical alloy and melt blend techniques, respectively. Different percentages of the prepared charcoal nanoparticles was introduced into the hybrid composites to study the effect on dielectric properties, shielding effectiveness, reflection loss and structural morphology in the frequency range of 8–12 GHz.. Findings showed that the sample with the highest amount of charcoal percentage had the best shielding effectiveness and dielectric constant. The value of dielectric constant gradually increased from 3.06 to 5.45 at the frequency range measured. The charcoal average particle size was estimated to be 21.42 nm using TEM analysis while the mean deviation of surface roughness ranged from 5.45 to 25.56 nm using atomic force microscope. The highest shielding effectiveness of the hybrid composites was obtained for the 30 wt% nano charcoal content with a value of -48.78 dB at 10 GHz. The complete dispersion and interaction of the charcoal with the PCL and UPH enhanced the dielectric constant, loss factor, hence making it potent in microwave absorption, shielding and radar applications.

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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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Mechanical, Dielectric and Shielding Performance of Rice Husk/Polycaprolactone Composites Enhanced via Rice Husk Particles Inclusion

Cited by 5 publications

References 13 publications

Performance Characterisation of Gum Arabic Bonded Particle Board Made From Rice Husk and Candle Wax

Performance Characterisation of Gum Arabic Bonded Particle Board Made From Rice Husk and Candle Wax

Microwave Absorption Properties of Unripe Plantain Husk, Polycaprolactone and Charcoal Powder Hybrid Nanocomposites Using Numerical Simulation at X-Band Frequency

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

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