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M. Latiful Fadly
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Automotive Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Effect of Na2S treatment and oil palm empty fruit bunch fibre content on the mechanical properties of polyester composites for potential automotive applications M. Latiful Fadly; Lazrisyah, Sutan; Panuh, Dedikarni
Journal of Renewable Energy and Mechanics Vol. 9 No. 02 (2026): REM VOL 9 No 02 2026
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2026.29195

Abstract

Oil palm empty fruit bunch (OPEFB) is an abundant lignocellulosic residue with potential as reinforcement for polymer composites. This study evaluates the effect of OPEFB fibre content and sodium sulfide (Na₂S) treatment on the mechanical behaviour of polyester-based composites for potential automotive applications. OPEFB fibres were treated with 4 wt.% NaOH combined with Na₂S concentrations of 0, 2, 3, 4, and 6%, and composites were prepared at nominal resin: fibre compositions of 100:0, 70:30, and 50:50. Tensile properties were evaluated according to ASTM D638 Type I, while impact behaviour was assessed using a pendulum impact test. Increasing Na₂S concentration generally enhanced tensile strength and elastic modulus. The highest tensile strength (12.81 MPa) and elastic modulus (391.62 MPa) were obtained for the 70:30 composite treated with 6% Na₂S. The 50:50 composite also showed improved tensile strength, reaching 12.23 MPa at 6% Na₂S, although its performance remained slightly below that of the 70:30 composition. Elongation at break exhibited a non-monotonic response, indicating a strength-stiffness-ductility trade-off. These findings demonstrate that Na₂S-assisted alkaline treatment can improve the mechanical response of OPEFB/polyester composites; however, further statistical validation, interfacial characterisation, and quantitative benchmarking are required before suitability for automotive bumper components can be established.
Co-Authors Dedikarni Lazrisyah, Sutan