Siti Shuhadah Md Saleh
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Preferred name
Siti Shuhadah Md Saleh
Official Name
Siti Shuhadah, Md Saleh
Alternative Name
Siti Shuhadah, M. S.
Saleh, Siti Shuhadah Muhammad
Md Saleh, S.S
Saleh, S.S.M.
Siti Shuhadah, M.S.
Main Affiliation
Scopus Author ID
57212339952

Research Output
Now showing 1 - 2 of 2
  • Publication
    Preparation of carbon nanotubes/alumina hybrid-filled phenolic composite with enhanced wear resistance
    ( 2023)
    Siti Shuhadah Md Saleh
    ;
    Mohd Firdaus Omar
    ;
    Hazizan Md Akil
    ;
    Muhammad Helmi Abdul Kudus
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Andrei Victor Sandu
    ;
    Petrica Vizureanu
    ;
    Khairul Anwar Abdul Halim
    ;
    Mohamad Syahmie Mohamad Rasidi
    ;
    Syarifah Nuraqmar Syed Mahamud
    ;
    Ion Sandu
    ;
    Norlin Nosbi
    Hybrid fillers can be produced via various methods, such as physical mixing and chemical modification. However, there is a limited number of studies on the effect of hybridisation on the mechanical performance of hybrid filler-reinforced polymer composites, especially in the context of wear performance. This study investigated the wear resistance of carbon nanotubes (CNTs)/alumina hybrid-filled phenolic composite, where two hybrid methods were used to produce the CNTs/alumina hybrid filler. The CNTs/alumina (CVD hybrid) was synthesised using the chemical vapour deposition (CVD) method, whereas the CNTs-/alumina (physically hybrid) was prepared using the ball milling method. The CNTs/alumina hybrid filler was then used as a filler in the phenolic composites. The composites were prepared using a hot mounting press and then subjected to a dry sliding wear test using a pin-on-disc (POD) tester. The results show that the composite filled with the CVD hybrid filler (HYB composite) had better wear resistance than the composite filled with physically hybrid filler (PHY composite) and pure phenolic. At 5 wt%, the HYB composite showed a 74.68% reduction in wear, while the PHY composite showed a 56.44% reduction in wear compared to pure phenolic. The HYB composite exhibited the lowest average coefficient of friction (COF) compared to the PHY composite and pure phenolic. The average COF decreased with increasing sliding speeds and applied loads. The phenolic composites’ wear and average COF are in the order HYB composite < PHY composite < pure phenolic under all sliding speeds and applied loads.
      2  8
  • Publication
    Molecular Interactions between polyurethane and UiO-66 in Polymer-MOF nanocomposites: microstructural and mechanical effects
    (Polska Akademia Nauk, 2025)
    Mohd Firdaus Omar
    ;
    Shayfull Zamree Abd. Rahim
    ;
    S. Ahmad
    ;
    E.M. Mahdi
    ;
    Khairul Anwar Abdul Halim
    ;
    H. Md Akil
    ;
    N. Nosbi
    ;
    N. Yudasari
    ;
    M.H. Hassan
    ;
    M.B.H. Othman
    ;
    Siti Shuhadah Md Saleh
    The demand for polymer-based nanocomposite-reinforced nanoporous materials is becoming essential in sustainable development studies. Integrating nanoporous materials such as Metal-Organic Frameworks (MOFs) in polymer matrices is essential for developing sustainable advanced materials. Combining MOFs and polymer matrices can produce a hybrid material with improved mechanical strength and stability relative to its constituents. This study aims to elucidate the effect of synthesised UiO-66 nanoparticles in a polyurethane (PU) matrix on the subsequent hybrid materials' microstructural and mechanical properties. UiO-66 nanoparticles were synthesised at 120°C, 130°C, and 140°C. The nanoparticles and subsequent nanocomposite were characterised using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), and Field Emission-Secondary Electron Microscopy (FE-SEM). The experimental findings indicate that the UiO-66 nanoparticles synthesised at 130°C exhibited a highly desirable crystal structure and effective adsorption properties, and the nanoparticles synthesised at this temperature were then used to reinforce PU, forming a polymer-MOF nanocomposite. The mechanical properties of the resulting nanocomposite were determined using tensile and nanoindentation tests. The UiO-66 nanoparticles were incorporated into PU matrices at various weight percentages (10 wt.%, 20 wt.%, 30 wt.%, and 40 wt.%) via the solution casting technique. The results indicated that 30 wt.% UiO-66 in the polymer nanocomposite exhibits the best mechanical properties, and loading the polymer nanocomposite beyond 30 wt.% is more likely to result in nanoparticle agglomeration and brittle behaviours.