Nur Farahiyah Mohammad
Thumbnail Image
Preferred name
Nur Farahiyah Mohammad
Official Name
Nur Farahiyah, Mohammad
Alternative Name
Mohammad, N. F.
Nur Farahiyah, Mohammad
Mohammad, N.
Main Affiliation
Scopus Author ID
36872346600
Researcher ID
X-6539-2019

Research Output

Filters

1 1
7
Reset filters

Settings
Now showing 1 - 7 of 7
Thumbnail Image
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.

View
Thumbnail Image
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.

View
No Thumbnail Available
Publication

Effect of surfactant concentrations on pore characteristics of mesoporous carbonated Hydroxyapatite prepared by soft-templating hydrothermal method

2018-11 , Nur Farahiyah Mohammad , R. Othman , A. A. Abdullah , F. Y. Yeoh

Mesoporous carbonated hydroxyapatite is a promised material for the application in drug delivery. Mesoporous carbonated hydroxyapatite (CHA) was synthesised through a hydrothermal co-precipitation method using different concentration (1.7, 7, 10 and 14 mM) of non-ionic surfactant P123 as a pores template. The crystalline phase, chemical composition, morphology and pore size distribution of mesoporous CHA were analysed using various materials characterisation techniques. The presence of mesopores as an array of pore channels in the synthesised sample were confirmed using transmission electron microscope. The optimum pore characteristics (i.e. surface area = 78 m2g-1, pore size = 27 nm and pore volume = 0.542 nm) of mesoporous CHA was obtained when surfactant concentration (1.7 mM) was maintained closed to critical micelle concentration (CMC), 0.0044 mM.

View
Thumbnail Image
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

View
Thumbnail Image
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.

View
Thumbnail Image
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.

View
Thumbnail Image
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).

View