Sharifah Shahnaz Syed Bakar
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Preferred name
Sharifah Shahnaz Syed Bakar
Official Name
Sharifah Shahnaz, Syed Bakar
Alternative Name
Bakar, S. S.S.
Bakar, Sharifah Shahnaz Binti Syed
Bakar, SHARIFAH SHAHNAZ Syed
Main Affiliation
Scopus Author ID
55560806500

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  • Publication
    Effect of sintering temperature on the preparation and characterization of green glass ceramic from rice husk ash as a matrix
    (Trans Tech Publications Ltd., 2020)
    Shahrizam Saad
    ;
    Abdullah Chik
    ;
    Khairel Rafezi Ahmad
    ;
    Sharifah Shahnaz Syed Bakar
    Powder metallurgy technique were proved successful net-shape technology which suitable for the production of green glass ceramic (GGC) from rice husk ash (RHA) and characterized by good physical and mechanical properties of glass ceramic. In this research, the glass sample was formed by mixing varying percentage of weight of silica, flux and additives. The aim of this work is to study the effect of the sintering temperature to the physical and mechanical properties of GGC. The samples were mixed in different volume fraction of additives which is 5%, 10% and 15% in constant composition of RHA and flux. The mixture was consolidated into rigid die compaction at 300MPa, then sintered at 450, 550 and 750°C. Vickers hardness test were investigated. The glass composite were then characterize by scanning electron microscopy (SEM). The GGC with 10% additives at sintering temperature 550°C shows highest hardness strength which is about 213.0 HV.
  • Publication
    Investigation on the effect of electrospinning parameters: voltage and flow rate on PVDF fiber
    (Springer, 2023)
    Ammar Athallah Budiarto
    ;
    Sharifah Shahnaz Syed Bakar
    ;
    Shahrizam Saad
    ;
    Shuhaida Yahud
    Polyvinylidene fluoride (PVDF) is a high purity thermoplastic fluoropolymer and high-capacity polymer that is employed in the electronics, space, and aeronautics industries. Electrospinning parameters have a considerable impact on the morphology, crystallinity, and electrical conductivity of PVDF fiber. Voltage and flow rate are the electrospinning parameters investigated in this study. As a result, the goal of this study is to investigate the effects of various voltages and flow rates on PVDF electrospun fiber. Electrospinning is the simplest and low-cost method to produce PVDF fibers by dissolving PVDF in solvent N, N-Dimethylformamide (DMF). About 15 wt% PVDF solution was used. Electrospinning parameters used were varied applied voltages 15 and 20 kV, flow rates 0.8, 1.0, 1.2, and 1.4 ml/h. Tip-to-collector distance was fixed at 15 cm. Scanning electron microscope (SEM), four-point probe, and X-ray diffraction (XRD) were performed to determine the morphology, electrical conductivity, and crystallinity phase of electrospun PVDF fibers. The SEM analysis concluded that bead formation occurs at higher flow rate and higher voltage. With higher flow rates and lower applied voltage, the fiber's thickness increases. XRD analysis shows that shift peak is observed among all fibers due to short electrospinning time which leads to insufficient thickness of electrospun mat, which affects the mechanical properties of fibers and causes peak shift. Four-point probe analysis concluded that the average conductance increases sharply as flow rate increases and the average resistance decreases. Also, as applied voltage increases, average conductance decreases and the average resistance increases.