Mohd Azaman Md Deros
Thumbnail Image
Preferred name
Mohd Azaman Md Deros
Official Name
Mohd Azaman, Md Deros
Alternative Name
Deros, Mohd Azaman
Main Affiliation
Scopus Author ID
57205730917
Researcher ID
L-7137-2013

Research Output

Filters
Reset filters

Settings
Now showing 1 - 4 of 4
  • Publication
    Investigation on the Effect of Printing Parameters on Flexural properties of 3D Printed Polymeric Scaffolds
    ( 2022-01-24)
    Nur Syahirah Mohd Tamizi
    ;
    Nooraizedfiza Zainon
    ;
    Mohd Azaman Md Deros
    ;
    Basri A.A.
    Thermoplastic polymers (PLA) are used for bone scaffold reconstruction that helps facilitate the transportation of oxygen and nutrients, including cell activity such as migration, proliferation, attachment, and differentiation. Throughout evaluation of polymer scaffold of its mechanical properties that could heal human body injuries after implantation. However, these ideal parameters for polymeric scaffolds in terms of flexural characteristics are undefined in tissue engineering applications. The Taguchi approach was employed using an orthogonal array L9 to study the ideal print parameters for 3D printing and the elements that most influence flexural qualities, as well as to forecast the highest flexural strength that could be reached with the optimal printing parameter. Furthermore, the flexural test is an appropriate test to evaluate the mechanical properties of the scaffold. The Taguchi technique determined that a printing speed of 90 mm/s, a layer height of 0.2 mm, and a density of 60% infill was the optimal combination of parameters. Besides, Printing speed showed as the most significant factor contribution while the infill density is the lowest contributor. The maximum level of printing speed, the average percentage of infill, and the medium layer height are the best parameter combinations. Parameter optimization on the most influential contributor indicates the printing speed of the specimen. Thus, the parameter for the selected factor in scaffold fabrication was optimized with a significant contribution. The predicted flexural strength was 383.92 MPa, while actual test obtained was 360.221 MPa with an error of 6.57 %.
  • Publication
    Effect of blend composition on characteristics and performance of jatropha bio-epoxy/epoxy matrix in composites with carbon fiber reinforcement
    ( 2020-05-01)
    Radzi M.H.M.
    ;
    Abdan K.
    ;
    Abidin Z.Z.
    ;
    Mohd Azaman Md Deros
    ;
    Zin M.H.
    Characteristics and performances of a blended jatropha bio-epoxy/epoxy as a matrix in carbon fiber reinforcement was studied. The amount of bioepoxy was arranged from 0 wt%, 25 wt%, 30 wt%, 40 wt%, and 50 wt% of the total matrix. Several analyses were performed to characterize and observe their performance. Fourier transform infrared spectroscopy, thermal analysis, physical characteristics, flammability, and soil burial were conducted, as well as mechanical tests. The results showed that introducing bio-epoxy in the matrix changed characteristics and increased or decreased their performance. Blending more than 25 wt% of bio-epoxy led to improved thermal stability between 280 °C to 350 °C and better biodegradability. However, tensile and flexural strength as well as modulus of elasticity decreased once the proportion of bio-epoxy was greater than 25 wt%. The paper proposed an optimal amount of jatropha bio-epoxy so that an alternative biocomposite application could be introduced to minimize carbon footprint in the environment.
  • Publication
    Tensile properties of hybridised fire retardants in pineapple leaf fibre (PALF) reinforced polymer composites
    ( 2021-10-25)
    Hazwani M.
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Azaman Md Deros
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Cheng Ee Meng
    This paper presents the tensile properties of hybridised fire retardants Pineapple Leaf Fibre (PALF) reinforced polymer composite. The polymer composites were prepared using the hand lay-up method of fabrication, in which two-layer PALF was used, and the epoxy resin with the fire retardants were mixed. The non-hybridised fire retardants are ammonium polyphosphate (APP), magnesium hydroxide (MH) and aluminium hydroxide (ALH), while the hybridised fire retardants are ammonium polyphosphate/magnesium hydroxide (APP/MH), ammonium polyphosphate/aluminium hydroxide (APP/ALH) and magnesium hydroxide/aluminium hydroxide (MH/ALH). The samples were tested using the universal testing machine with load cell 50kN using ASTM D3039 standard. The samples APP/ALH and MH/ALH have better tensile strength, which is 37.10 MPa and 37.05 MPa, respectively. The dispersion of fire-retardants in the reinforced composites seems to affect their mechanical performance. Meanwhile, sample MH/ALH has the highest elastic modulus with 3.65 GPa. Sample MH/ALH likely to be an excellent hybridised fire-retardant filler for the composites.
      2
  • Publication
    Effects of Ply Orientations and Stacking Sequences on Impact Response of Pineapple Leaf Fibre (PALF)/Carbon Hybrid Laminate Composites
    ( 2022-09-01)
    Mohd Khairul Rabani Hashim
    ;
    Mohd Shukry Abdul Majid
    ;
    Farizul Hafiz Kasim
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Alshahrani H.A.
    ;
    Hui D.
    ;
    Mohd Azaman Md Deros
    This study investigated the impact response behaviours of pineapple leaf fibre (PALF)/carbon hybrid laminate composites for different ply orientations and stacking sequences. The laminates were manufactured using a vacuum infusion approach with various stacking sequences and ply orientations classified as symmetric quasi-isotropic, angle-ply symmetric, and cross-ply symmetric. The laminates were analysed using an IMATEK IM10 drop weight impact tester with an increment of 5 J until the samples were perforated. This investigation reveals that the overall impact properties of PALF and carbon as reinforcements were improved by a beneficial hybridised effect. The laminates with an exterior carbon layer can withstand high impact energy levels up to 27.5 J. The laminate with different stacking sequences had a lower energy transfer rate and ruptured at higher impact energy. The laminates with ply orientations of [0°/90°] and [±45°]8 exhibited 10% to 30% better energy absorption than those with ply orientations of [±45°2, 0°/90°2]s and [0°/90°2, ±45°2]s due to energy being readily transferred within the same linear ply orientation. Through visual inspection, delamination was observed to occur at the interfaces of different stacking sequences and ply orientations.
      2