Ahmad Syayuthi Abdul Rahman
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Ahmad Syayuthi Abdul Rahman
Official Name
Ahmad Syayuthi, Abdul Rahman
Alternative Name
Abdul Rahman, Ahmad Syayuthi
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  • Publication
    Tribological behaviour of Furcraea Foetida fiber-reinforced epoxy composites under varying applied loads
    ( 2024-02-01)
    Hussain, Haja Syed
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Mohd Shukry Abdul Majid
    ;
    Ahmad Syayuthi Abdul Rahman
    ;
    Mohd Azaman Md Deros
    ;
    Sulaiman, Mohd Hafis
    This study investigates the tribological behaviour of Furcraea Foetida fibre-reinforced epoxy composites under varying applied loads. The aim is to understand the influence of applied load on the frictional behaviour and wear characteristics of the composites. The study employs a pin-on-disk test to examine the frictional force, coefficient of friction (COF), and specific wear rate (SWR) of identical samples subjected to four different loads (80 N, 100 N, 120 N, 140 N). Scanning electron microscopy (SEM) is used to analyse the surface morphology under different loads. The frictional force versus sliding distance graph demonstrates an increasing trend from 80 N to 120 N, followed by minimal change at 140 N. Similarly, the COF versus applied load graph shows a progressive increase from 80 N to 120 N, with the least increase observed at 140 N. The SWR versus applied load graph indicates an increasing trend from 80 N to 120 N, with marginal variation at 140 N. SEM analysis reveals that only the sample subjected to 140 N shows evidence of plastic deformation. In conclusion, the results indicate that the applied load significantly influences the frictional behaviour and wear characteristics of the Furcraea Foetida fibre-reinforced epoxy composites. At higher loads, the increase in frictional force, COF, and SWR becomes less pronounced, suggesting potential saturation in the composites' response. The presence of plastic deformation at 140 N further highlights the unique behaviour observed at this load. These findings contribute to a better understanding of the tribological performance of the composites and have implications for their practical applications.
      8  23
  • Publication
    Wear and friction properties of pineapple leaf fibers‐reinforced natural rubber composites with the influence of multi‐walled carbon nanotubes
    (John Wiley and Sons Inc, 2025)
    Yeo Yi Xuan
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Mohd Shukry Abdul Majid
    ;
    S. M. Sapuan
    ;
    Ahmad Syayuthi Abdul Rahman
    ;
    Fauziah Che Mat
    This study advances the creation of biocomposite materials and serves to reduce and utilize agricultural waste such as pineapple leaf fibers (PALF). In this study, PALF-reinforced natural rubber (NR) composites with included multi-walled carbon nanotubes (MWCNT) were analyzed and characterized at various fiber loadings. The PALF content was ranged from 0, 10, 20 to 30 parts per hundred rubber (phr) while the MWCNT content was maintained at 10 phr. A two-roll mill mixing process followed by molding was employed to fabricate the NR composites. Based on the curing behavior, tribological properties, and morphological analysis, it was confirmed that the hybrid reinforcement of the MWCNT and PALF improved the curing behavior, wear resistance, and morphology of the composites. The wear and friction properties of the composites namely coefficient of friction (COF), frictional force and specific wear rate (SWR) are significantly influenced by the applied loads. The COF of NR/30PALF and NR/30PALF/MWCNT composites is reduced to 0.80 and 0.72 respectively under 15 N of load. Physical properties namely the cross-link density and swelling behavior of the composites ranged from 3.70 × 10−4 to 5.71 × 10−4 mol/cm3 and 207.81 to 386.17%, respectively. According to the results obtained, the best cure and wear behavior followed by the morphological analysis are observed in NR/30PALF/MWCNT composite. Among the samples tested, NR/30PALF composite exhibited the best performance in both cross-link density and swelling behavior. It is anticipated that the findings of this study are expected to provide theoretical data for the design and optimisation of high-performance automotive and footwear applications. Highlights: NR/30PALF/MWCNT hybrid composite exhibited the shortest (Formula presented.) The addition of MWCNT improved the wear resistance of the composites The reinforcement of PALF at 30 phr possessed the lowest swelling ratio and the highest cross-link density of the composites The addition of MWCNT decreased cross-link density of the composites.
      2  3