Muhammad Faheem Mohd. Tahir
Thumbnail Image
Preferred name
Muhammad Faheem Mohd. Tahir
Official Name
Muhammad Faheem, Mohd. Tahir
Alternative Name
Muhammad Faheem, T. M.
Tahir, Faheem
Faheem, Mohd Tahir Muhammad
Tahir, Muhammad Faheem
Tahir, Muhammad Faheem Mohd
Tahir, M. F.M.
Main Affiliation
Scopus Author ID
57211574727
Researcher ID
AAT-9691-2021
DWS-8186-2022
IHM-2046-2023

Research Output

Filters

34
Reset filters

Settings
Now showing 1 - 10 of 34
Thumbnail Image
Publication

Structural, morphological and thermal properties of cellulose nanofibers from napier fiber (Pennisetum purpureum)

2020-09-01 , Radakisnin R. , Mohd Shukry Abdul Majid , Mohd Ridzuan Mohd Jamir , Jawaid M. , Sultan M.T.H. , Muhammad Faheem Mohd. Tahir

The purpose of the study is to investigate the utilisation of Napier fiber (Pennisetum purpureum) as a source for the fabrication of cellulose nanofibers (CNF). In this study, cellulose nanofibers (CNF) from Napier fiber were isolated via ball-milling assisted by acid hydrolysis. Acid hydrolysis with different molarities (1.0, 3.8 and 5.6 M) was performed efficiently facilitate cellulose fiber size reduction. The resulting CNFs were characterised through Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), particle size analyser (PSA), field-emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), and transmission electron microscopy (TEM). The FTIR results demonstrated that there were no obvious changes observed between the spectra of the CNFs with different molarities of acid hydrolysis. With 5.6 M acid hydrolysis, the XRD analysis displayed the highest degree of CNF crystallinity at 70.67%. In a thermal analysis by TGA and DTG, cellulose nanofiber with 5.6 M acid hydrolysis tended to produce cellulose nanofibers with higher thermal stability. As evidenced by the structural morphologies, a fibrous network nanostructure was obtained under TEM and AFM analysis, while a compact structure was observed under FESEM analysis. In conclusion, the isolated CNFs from Napier-derived cellulose are expected to yield potential to be used as a suitable source for nanocomposite production in various applications, including pharmaceutical, food packaging and biomedical fields.

View
Thumbnail Image
Publication

Experimental investigation of chopped steel wool fiber at various ratio reinforced cementitious composite panels

2021 , Akrm A. Rmdan Amer , Mohd. Mustafa Al Bakri Abdullah , Liew Yun Ming , Ikmal Hakem A Aziz , Muhammad Faheem Mohd. Tahir , Shayfull Zamree Abd. Rahim , Hetham A.R. Amer

The flexural toughness of chopped steel wool fiber reinforced cementitious composite panels was investigated. Reinforced cementitious composite panels were produced by mixing of chopped steel wool fiber with a ratio range between 0.5% to 6.0% and 0.5% as a step increment of the total mixture weight, where the cement to sand ratio was 1:1.5 with water to cement ratio of 0.45. The generated reinforced cementitious panels were tested at 28 days in terms of load-carrying capacity, deflection capacities, post-yielding effects, and flexural toughness. The inclusion of chopped steel wool fiber until 4.5% resulted in gradually increasing load-carrying capacity and deflection capacities while, provides various ductility, which would simultaneously the varying of deflection capability in the post-yielding stage. Meanwhile, additional fiber beyond 4.5% resulted in decreased maximum load-carrying capacity and increase stiffness at the expense of ductility. Lastly, the inclusion of curves gradually.

View
Thumbnail Image
Publication

Optimizing of the cementitious composite matrix by addition of steel wool fibers (chopped) based on physical and mechanical analysis

2021-03-01 , Amer A.A.R. , Mohd. Mustafa Al Bakri Abdullah , Liew Yun Ming , Ikmal Hakem A. Aziz , Wysłocki J.J. , Muhammad Faheem Mohd. Tahir , Sochacki W. , Garus S. , Gondro J. , Amer H.A.R.

The demand for durable, resistant, and high-strength structural material has led to the use of fibers as reinforcing elements. This paper presents an investigation into the inclusion of chopped steel wool fibers (CSWFs) in cement to form a high-flexural strength cementitious composite matrix (CCM). CSWFs were used as the primary reinforcement in CCM at increments of 0.5 wt%, from 0.5-6 wt%, with ratios of cement to sand of 1:1.5 and water to cement of 0.45. The inclusion of CSWFs resulted in an excellent optimization of the physicomechanical properties of the CCM, such as its density (2.302 g/cm3), compressive strength (61.452 MPa), and maximum flexural strength (10.64 MPa), all of which exceeded the performances of other reinforcement elements reported in the literature.

View
Thumbnail Image
Publication

Properties of Blended Alkaline System Geopolymer-A Review

2020-03-18 , Ahmad Zaidi F.H. , Romisuhani Ahmad , Zarina Yahya , Muhammad Faheem Mohd. Tahir , Wan Mastura Wan Ibrahim , Saufi A.S.

Geopolymers are inorganic material that comprise of silicon(Si) and aluminium(Al) bonded by oxygen atom to form a polymer network. The binder material used for geopolymer such as fly ash and blast furnace are mostly the industrial waste or by-products containing high content of silica and aluminium which acted as precursor for geopolymerization. The raw material plays an important role in the formation of geopolymer for each material may result in different properties of geopolymer. To improve the performance of these binders, numerous studies have been focused on the production of mixes based on blends of reactive precursors. The blends usually involve a Ca-rich precursor such as granulated blast furnace slag (GGBS), and an aluminosilicate source such as metakaolin or low calcium fly ash, to promote the stable coexistence of calcium silicate hydrate (C-S-H) gels formed from the activation of the GGBS and the geopolymer gel (N-A-S-H) produced from the activation of the aluminosilicate. Thus, this paper is intended to review the properties of different type of mixes of blended alkaline system.

View
Thumbnail Image
Publication

Review on mechanical properties of metakaolin geopolymer concrete by inclusion of steel fibers

2024 , Meor Ahmad Faris Meor Ahmad Tajudin , Muhammad Faheem Mohd. Tahir , Shamala Ramasamy , Mohamad Firdaus Abu Hashim , Abdullah Abdul Samad , Mohd Al-Hafiz Mohd Nawi

View
No Thumbnail Available
Publication

Potential of new sustainable Green Geopolymer Metal Composite (GGMC) material as mould insert for Rapid Tooling (RT) in injection moulding process

2023 , Allice Tan Mun Yin , Shayfull Zamree Abd. Rahim , Mohd. Mustafa Al Bakri Abdullah , Marcin Nabialek , Abdellah El-hadj Abdellah , Allan Rennie , Aurel Mihail Titu , Muhammad Faheem Mohd. Tahir

The investigation of mould inserts in the injection moulding process using metal epoxy composite (MEC) with pure metal filler particles is gaining popularity among researchers. Therefore, to attain zero emissions, the idea of recycling metal waste from industries and workshops must be investigated (waste free) because metal recycling conserves natural resources while requiring less energy to manufacture new products than virgin raw materials would. The utilisation of metal scrap for rapid tooling (RT) in the injection moulding industry is a fascinating and potentially viable approach. On the other hand, epoxy that can endure high temperatures (>220 °C) is challenging to find and expensive. Meanwhile, industrial scrap from coal-fired power plants can be a precursor to creating geopolymer materials with desired physical and mechanical qualities for RT applications. One intriguing attribute of geopolymer is its ability to endure temperatures up to 1000 °C. Nonetheless, geopolymer has a higher compressive strength of 60–80 MPa (8700–11,600 psi) than epoxy (68.95 MPa) (10,000 psi). Aside from its low cost, geopolymer offers superior resilience to harsh environments and high compressive and flexural strength. This research aims to investigate the possibility of generating a new sustainable material by integrating several types of metals in green geopolymer metal composite (GGMC) mould inserts for RT in the injection moulding process. It is necessary to examine and investigate the optimal formulation of GGMC as mould inserts for RT in the injection moulding process. With less expensive and more ecologically friendly components, the GGMC is expected to be a superior choice as a mould insert for RT. This research substantially impacts environmental preservation, cost reduction, and maintaining and sustaining the metal waste management system. As a result of the lower cost of recycled metals, sectors such as mould-making and machining will profit the most.

View
Thumbnail Image
Publication

Compressive strength and thermal conductivity of metakaolin geopolymers with anisotropic insulations

2020-03-18 , Jaya N.A. , Liew Yun Ming , Mohd. Mustafa Al Bakri Abdullah , Kamarudin Hussin , Heah Cheng Yong , Bayuaji R. , Muhammad Faheem Mohd. Tahir

This research investigated the properties of thermally insulating geopolymer prepared using waste filler (fibreboard and rubber) to act as anisotropic pore/insulation. The geopolymer matrix was synthesised using metakaolin and an alkaline solution consists of sodium hydroxide solution and sodium silicate mixture. Geopolymers with varying content (0, 3, 5 and 7 layers) of coin-shaped fibreboard and expanded polystyrene are produced to examine the anisotropic insulation effect on the material characteristics. The compressive strength and thermal conductivity were determined experimentally. From the results, it is proved that the use of anisotropic insulations can improve the thermal conductivity and minimizing the reduction of compressive strength. Geopolymer incorporated with fibreboard had better performance in terms of strength while geopolymer incorporated with rubber had better thermal conductivity.

View
Thumbnail Image
Publication

Study on the effects of anodizing voltage to the AAO thin film dimensional properties synthesized by single step anodization method

2021-05-03 , Shahidah Arina Shamsuddin , Mohd Nazree Derman , Uda Hashim , Muhammad Faheem Mohd. Tahir

Anodic aluminium oxide (AAO) thin film electrodes were synthesized by using a single step anodizing method in 15 °C of 0.3 M oxalic acid at five different anodizing voltage ranging from 20 V to 60 V, respectively. The effect of anodizing voltage to the AAO dimensional properties were about to be investigated. Morphological observations were all done by FESEM where the measurements and calculation were made by using ImageJ and formulas. To ensure that the pore sizes were totally depended on the anodizing voltage, etching process were done at constant duration for all samples. The correlation between all AAO dimensional properties like pores size, interpore distance, wall thickness, pore density, percentage of porosity and nanoporous oxide thickness were presented in a linear graph.

View
Thumbnail Image
Publication

Physical, thermal, and mechanical properties of highly porous polylactic acid/cellulose nanofibre scaffolds prepared by salt leaching technique

2021-01-01 , Radakisnin R. , Mohd Shukry Abdul Majid , Mohd Ridzuan Mohd Jamir , Muhammad Faheem Mohd. Tahir , Cheng Ee Meng , Al Alshahrani H.

This study aimed to prepare and characterise polylactic acid (PLA) reinforced with cellulose nanofibre (CNF) from a Pennisetum purpureum-based composite scaffold and determine its structural and mechanical properties. Porous scaffolds with CNF compositions of 5‒20 wt% in the PLA matrix were developed using solvent casting and particulate leaching of its porogen at 90 wt% of loadings. Morphology studies using field emission scanning electron microscopy revealed that the scaffolds had well-interconnected pores with an average pore size range of 67‒137 μm and porosity >76%. X-ray diffraction confirmed the interconnectivity and homogeneity of the pores and the fibrous structure of the scaffolds. The compressive strength of the fabricated scaffolds varied between 2.34 and 6.66 MPa, while their compressive modulus was between 1.95 and 6.04 MPa for various CNF contents. Furthermore, water absorption and thermal degradation studies showed that the scaffold had good hydrophilicity and improved thermal stability. These findings highlight the need to modify the pore structure and mechanical performance simultaneously for tissue engineering. Thus, this study concludes that the developed PLA scaffolds reinforced with CNF from Pennisetum purpureum are potential candidates for cell attachment and extracellular matrix generation.

View
Thumbnail Image
Publication

Practical applications of nano-SiOâ‚‚ obtained by different synthesis routs in construction materials domain

2020 , M. A. Moncea , Gy Deák , A. G. Baraitaru , F. D. Dumitru , M. V. Olteanu , A. M. Panait , G. Cornățeanu , Mohd. Mustafa Al Bakri Abdullah , Muhammad Faheem Mohd. Tahir

Nowadays, there are various nanomaterials embedded in construction materials to improve their mechanical performances, durability, heating resistance as well as some specific properties such as self-cleaning and healing abilities. In this context, investigations regarding the effect of SiOâ‚‚ nano-particles embedded in a cement matrix on mechanical properties and microstructure were performed. For this purpose nano-SiOâ‚‚ powders were obtained by sol-gel method using different molar ratios of TEOS/ethanol/water. The SiOâ‚‚ particles formation was confirmed by X-ray fluorescence analyses (XRF) and their nanometric sizes by scanning electron microscopy (SEM) technique. The cement based materials admixtures were obtained by using the water/binder ratio (w/b) of 0.5 and nano-SiOâ‚‚ in the proportions of 0.5%, respectively 0.7 %. The distribution of nano-SiOâ‚‚ particles within the cement matrix plays an essential role and governs the performance of these products. Therefore, to facilitate the nano-SiOâ‚‚ particles distribution the mixtures were good homogenized in dry state. The mechanical test results showed that after 28 days of hydration the cement based materials with 0.7% nano-SiOâ‚‚ content recorded better compressive strengths compared with those of the etalon (E=62MPa vs. M-NS1=72MPa). The microstructure of cement based materials highlighted the presence of Ca(OH)â‚‚, ettringite and calcium silicate hydrates as well as nano-SiOâ‚‚ particles distributed into the cement matrix.

View