Nur Farahiyah Mohammad
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Nur Farahiyah Mohammad
Official Name
Nur Farahiyah, Mohammad
Alternative Name
Mohammad, N. F.
Nur Farahiyah, Mohammad
Mohammad, N.
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Scopus Author ID
36872346600
Researcher ID
X-6539-2019

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  • Publication
    Properties of carbon nanotubes-calcium carbonate hybrid filled epoxy composites
    ( 2020-01-01)
    Siti Shuhadah Md Saleh
    ;
    Suhaimi S.M.
    ;
    Md Akil H.
    ;
    Nur Farahiyah Mohammad
    Carbon nanotubes (CNTs) have a great potential to be used as filler to enhance the mechanical properties of polymer composites due to excellent properties. However, CNTs have limitation of difficult to disperse in polymer matrix. The hybridization of CNTs and inorganic fillers can improve the dispersion and combine their properties in polymer composites. In the present work, the properties of the epoxy composites filled with carbon nanotube-calcium carbonate (CNTs-CaCO3) hybrid, at various filler loading (i.e., 1-5 wt.%) were studied. The CNTs-CaCO3 hybrid fillers were prepared by physically mixing (PHY) method and chemical vapor deposition (CVD) method. The tensile properties and hardness of both composites were investigated at different weight percentages of filler loading. The CNTs-CaCO3 CVD hybrid composites showed higher tensile strength and hardness than the CNTs-CaCO3 PHY hybrid composites. This increase was associated with the homogenous dispersion of CNT–CaCO3 particle filler. The morphological studies of fracture surfaces after tensile test by means of SEM showed homogenous dispersion of CNTs-calcium carbonate CVD hybrid in epoxy matrix. The result shows that the CNTs-calcium carbonate CVD hybrid composites are capable in increasing tensile strength by up to 116.4%, giving a tensile modulus of 40.3%, and hardness value of 39.2% as compared to a pure epoxy.
  • Publication
    Characterization of silica powder prepared from acid leaching and thermal treatment of RHA
    ( 2024)
    Mudrikah Sofia Mahmud
    ;
    Farah Diana Mohd Daud
    ;
    Norshahida Sarifuddin
    ;
    Hafizah Hanim Mohd Zaki
    ;
    Norhuda Hidayah Nordin
    ;
    Nur Farahiyah Mohammad
  • Publication
    Preliminary study of the polymesoda expansa based hydroxyapatite for medical devices coating application
    ( 2020-12-15)
    Roslan M.R.
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Gilani M.A.
    ;
    Nur Farahiyah Mohammad
    ;
    Cheng Ee Meng
    ;
    Khalid M.F.A.
    ;
    Zoolfakar A.S.
    ;
    Nasrul Amri Mohd Amin
    ;
    Shah Fenner Khan Mohamad Khan
    Hydroxyapatite (HA) which is a group of calcium phosphate (CaP) is used as a medical devices coating due to its ability to increase the bioactivity and biocompatibility of the device surface. The attraction of using waste seashells products is interesting due to its sustainability and low cost solution especially in biomedical application. Polymesoda expansa or locally known as Lokan is potentially rich with calcium carbonate (CaCO3). Here, the synthesis of HA was done via precipitation method by utilizing the Polymesoda expansa (Lokan) shells as the resource of calcium precursors. Hydroxyapatite synthesized from Polymesoda expansa was carried out with different pH solution (pH 9 and 13) in alkaline environment. The effects of pH on the morphological and chemical composition properties as well as the Ca/P ratio of HA powders were analyzed through Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and Energy Dispersive X-ray Spectrometry (EDS). The finding demonstrates as the pH increases, the calcium apatite reduced and this had increases the Ca/P ratio.
  • Publication
    Effect of Nitrate Acid Treated Dolomite on the Tensile Properties of Ultra-High Molecular Weight Polyethylene (UHMWPE) Composites
    ( 2024-01-01)
    Abdullah S.F.A.
    ;
    Saleh S.S.M.
    ;
    Nur Farahiyah Mohammad
    ;
    Syarifah Nuraqmar Syed Mahamud
    ;
    Mohd Firdaus Omar
    ;
    Akil H.M.D.
    ;
    Chang B.P.
    ;
    Saliu H.R.
    ;
    Rostam N.H.
    ;
    Gondro J.
    Ultra-High Molecular Weight Polyethylene (UHMWPE) polymers have been used in biomedical applications due to its biocompatibility, durability, toughness and high wear resistance. To enhance the mechanical properties, various types of minerals are commonly utilized as fillers in UHMWPE. One of the minerals is dolomite, which has been recognized as a valuable mineral with versatile applications, particularly in the field of biomedical applications. This paper presents the tensile properties of UHMWPE composites that filled with dolomite and treated-dolomite at various filler loading (i.e., 1-5 wt.%). Nitric acid and diammonium phosphate were used to treat the dolomite. From the results, the peaks of the FTIR spectrum displays carbonate (CO3–2), phosphate (PO4–3) and hydroxyl (OH–) groups in the ct-dolomite powder sample while the XRD pattern reveals that using dolomite treated with 1M nitric acid resulted in the presence of calcium hydroxide phosphate (Ca10(PO4)5(OH)) and MgO. For tensile strength, UHMWPE/ct-dolomite composites show better tensile strength than the pure UHMWPE composites. Treated improve the dolomite filler and resulted in significantly better matrix-filler interfacial interactions and improve the properties.
  • Publication
    Synthesizing and Optimization the Hydroxyapatite Based on Corbiculacea Seashells
    ( 2021-01-01)
    Mohd Riza Mohd Roslan
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Nur Farahiyah Mohammad
    ;
    Cheng Ee Meng
    ;
    Nasrul Amri Mohd Amin
    ;
    Abdul Khalid M.F.
    ;
    Mohd Zakimi Zakaria
    ;
    Muhammad Mokhzaini Azizan
    ;
    Muzammil Jusoh
    Hydroxyapatite (HA) is one of the main components in bone which functions to enhance its cell regeneration. Synthetically produced HA, based on seashell resources has higher biocompatibility, and in high demand especially in bone tissue engineering. However, the secondary phase of HA production are calcium oxide and carbonate, which impedes its performance. HA is synthesized via wet chemical precipitation and optimization were done to obtain nearly pure HA by manipulating the pH value and sintering temperature. It is expected that the combination of these parameters will optimize the amount of secondary phase hence attained nearly stoichiometric or pure HA. HA powders were analyzed through Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-ray Spectrometry (EDX).
      1
  • Publication
    Nano Hydroxyapatite (Nano-HA) based on pholas orientalis shells and degradation analysis
    ( 2023-04)
    Mohd Riza Mohd Roslan
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Nur Farahiyah Mohammad
    ;
    Farah Diana Mohd Daud
    ;
    Cheng Ee Meng
    ;
    Beh Chong You
    Millions of tons of seashells are produced every day as waste around the world. These underutilized seashells waste was executed as calcium precursor by researcher to synthesis the nano-hydroxyapatite (nano-HA). Nano-HA was successfully synthesised from Pholas Orientalis seashells waste via the chemical precipitation method. Different sintering temperatures were implemented to evaluate the physicochemical criteria of nano-HA. The obtained powders were examined by various physicochemical methods such as XRD, FTIR, FESEM, EDX and degradation analysis. The peaks in XRD and FTIR analysis the HA is successfully produced. The FESEM images on the other hand showing the HA particle in nano size range with rice-like structure. Meanwhile, a variation of Ca/P ratio can be observed in respect to sintering temperatures. The Ca/P ratio for HA-WS, HA-S500 and HA-S700 sample is 1.78, 2.03 and 1.57 respectively. Different sintering temperatures result in different crystallinity value which consequently affects its degradation profile.
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