Fabrication and characterization of echinoidea spike particles and kenaf natural fibre-reinforced Azadirachta-Indica blended epoxy multi-hybrid bio composite

Prakash, Ved; Viswanthan, R.

doi:10.1016/j.compositesa.2019.01.008

Cited by 219 publications

(51 citation statements)

References 25 publications

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“…The initial mass loss is delayed up to 340°C and 350°C, which is mere 12% and 14% of improvement on comparing with pure natural rubber. This improvement is because of the high heat-carrying capacity of TiO 2 particle [23]. When temperatures increase the presence of TiO 2 start absorbing the heat energy and hinder the rotation of natural rubber molecules.…”

Section: Microwave Shielding Analysismentioning

confidence: 99%

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Prabhahar¹,

R³

2020

Mater. Res. Express

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This current work aims to prepare a flexible elastomeric microwave shielding composite material with good mechanical and thermal properties by dispersing Fe 3 O 4 and titania hybrid nano-particles. The primary aim of this research work is to prepare a high strength and high thermal stable flexible natural rubber composite with higher wave attenuation coefficient against 'X (8-12 GHz)' and 'Ku (12-18 GHz)' band microwave frequencies. The Fe 3 O 4 -Titania hybrids were prepared using low energy ball milling and the hybridization effect was confirmed using transmission electron spectroscopy. The prepared Fe 3 O 4 -Titania hybrids were surface-treated using 3-Aminopropyltriethoxysilane via wet solution method to avoid agglomeration. The natural rubber flexible composite was made by two-roll milling with recommended process parameters. The mechanical and thermal results showed improved tensile strength, modulus and mass decomposition. The highest tensile strength of 60 MPa was observed for composite contains 1.0 vol% of Fe 3 O 4 -TiO 2 particles. Similarly, the highest thermal stability of 385°C is observed for composite contain Fe 3 O 4 -TiO 2 particles. The X and Ku band microwave attenuation behaviour revealed the highest attenuation of 28.1 dB for 1.0 vol% of Fe 3 O 4 -TiO 2 particle dispersed rubber composite in Ku band frequency. These mechanically toughened thermally stable and high microwave attenuation flexible composites could be used as EMI shielding material at antennae and other telecommunication devices where electromagnetic wave interference creates crucial issues.

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Section: Microwave Shielding Analysismentioning

confidence: 99%

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Prabhahar¹,

R³

2020

Mater. Res. Express

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“…The properties of the kenaf fiber composites not only depend on the fiber itself, but also on the temperature exposure during mechanical processing [ 26 ], so researchers have investigated the thermal degradation of polymer matrix composites as this is a major problem in the application of thermoset polymers in different types of environments. Composite material behavior at different temperatures is an important parameter to be considered to determine which temperature produces the most appropriate material properties.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Alkali Treatment on Physical, Mechanical and Thermal Properties of Kenaf Fiber and Polymer Epoxy Composites

et al. 2021

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The use of kenaf fiber as a reinforcement material for polymer composites is gaining popularity, especially in the production of automotive components. The main objective of this current work is to relate the effect of alkali treatment on the single fiber itself and the composite material simultaneously. The effect of temperature condition during mechanical testing is also investigated. Composite materials with discontinuous natural kenaf fibers and epoxy resin were fabricated using a compression moulding process. The epoxy composites were reinforced with 50 wt% untreated and treated kenaf fibers. The kenaf fiber was treated with NaOH solution (6% by weight) for 24 h at room temperature. Kenaf fiber treated with NaOH treatment had a clean surface and no impurities. For the first time we can see that alkali treatment had a damaging effect on the mechanical properties of kenaf fibers itself and the treated kenaf/epoxy composites. The composite reinforced with untreated kenaf fiber and treated kenaf fiber showed increased tensile strength (72.85% and 12.97%, respectively) compared to the neat epoxy. Reinforcement of the composite with treated kenaf fiber decreased the tensile strength due to the fiber pull out and the formation of voids which weakens the adhesion between the fibers and matrix. The temperature conditions also play an important role in composites with a significant impact on the deterioration of composite materials. Treated kenaf fiber has thermal stability and is not sensitive to temperature and as a result reinforcement with treated kenaf gives a lower loss value of 76%.

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“…Kenaf stems consist of bast and core fibers known as kenaf fibers. Bast and core fibers exhibit a strength of 20 to 230 MPa with an average density of 1.45 g/cm 3 , while the kenaf fiber itself can reach a maximal tensile strength of 930 MPa [ 9 , 10 , 11 ]. However, the main drawback of using kenaf fibers is their hydrophilic nature, as they cannot be mixed with the hydrophobic polymer matrix given the issues surrounding their adhesion qualities [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, the main drawback of using kenaf fibers is their hydrophilic nature, as they cannot be mixed with the hydrophobic polymer matrix given the issues surrounding their adhesion qualities [ 12 , 13 ]. Hence, the researchers of this study tried to address and overcome this issue, including by using a surface treatment of 4 wt % of NaOH, which improved their mechanical properties by 78% [ 10 , 14 ]. Previous studies demonstrated that, by using kenaf-fiber-reinforced epoxy resin and aligning the fibers in a particular direction (0° to 90°), their mechanical properties could be improved without using any surface treatment.…”

Section: Introductionmentioning

confidence: 99%

Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

et al. 2020

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Automotive parts, including dashboards and trunk covers, are now fabricated through a compression-molding process in order to produce lightweight products and optimize fuel consumption. However, their mechanical strength is not compromised to avoid safety issues. Therefore, this study investigates kenaf-fiber-reinforced polypropylene composites using a simple combing approach to unidirectionally align kenaf fibers at 0°. The kenaf composite was found to withstand a maximal temperature of 120 °C. The tensile and flexural strengths of the aligned kenaf composites (50 and 90 MPa, respectively) were three times higher than those of the commercialized Product T (between 39 and 30.5 MPa, respectively) at a temperature range of 90 to 120 °C. These findings clearly showed that the mechanical properties of aligned kenaf fibers fabricated through the combing technique were able to withstand high operating temperatures (120 °C), and could be used as an alternative to other commercial natural-fiber products.

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Fabrication and characterization of echinoidea spike particles and kenaf natural fibre-reinforced Azadirachta-Indica blended epoxy multi-hybrid bio composite

Cited by 219 publications

References 25 publications

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

The Effect of Alkali Treatment on Physical, Mechanical and Thermal Properties of Kenaf Fiber and Polymer Epoxy Composites

Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

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Fabrication and characterization of echinoidea spike particles and kenaf natural fibre-reinforced Azadirachta-Indica blended epoxy multi-hybrid bio composite

Cited by 219 publications

References 25 publications

Role of Magnetite (Fe3O4)-Titania (TiO2) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Role of Magnetite (Fe3O4)-Titania (TiO2) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

The Effect of Alkali Treatment on Physical, Mechanical and Thermal Properties of Kenaf Fiber and Polymer Epoxy Composites

Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

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Product

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Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies