Mohamad Syahmie Mohamad Rasidi
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Preferred name
Mohamad Syahmie Mohamad Rasidi
Official Name
Mohamad Syahmie , Mohamad Rasidi
Translated Name
M. Syahmie
Alternative Name
Rasidi, M. Syahmie
Rasidi, Mohamad Syahmie Mohamad
Rasidi, Mohd
Rasidi, M. S. M.
Syahmie Rasidi, M.
Main Affiliation
Scopus Author ID
56051090900
Researcher ID
GFR-1887-2022

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The effect of filler content and chemical modification on properties of polylactic acid/recycled low density polyethylene/nypa fruticans husk biocomposites

2015 , Mohamad Syahmie Mohamad Rasidi

Nypa fruticans husk (NFH) filled polylactic acid (PLA)/recycled low density polyethylene (rLDPE) biocomposites had been prepared using Brabender Plasticoder EC PLUS at temperature 180˚C and rotor speed 50 rpm. The effect of NFH content and different types of chemical modifications on tensile properties, morphology, thermal properties and biodegradation of PLA/rLDPE/NFH biocomposites were studied. The various types of chemical modifications such as Polyethylene grafted maleic anhydride (PEMA), 3-Aminopropyltriethoxysilane (3-APE), Methyl methacrylate acid (MMA), Ethylenediaminetetraacetic acid disodium salt-2-hydrate (EDTA), and enzyme were used, respectively. The results showed that the addition of NFH reduced the tensile strength, elongation at break and degree of crystallinity (Xc), whereas the Young‘s modulus and thermal stability of biocomposites increased. The effects of α-amylase on the enzyme biodegradation of PLA/rLDPE/NFH biocomposites showed that the increased of NFH content has increased the biodegradation rate of the biocomposites. The morphology tensile fracture surface of PLA/rLDPE/NFH biocomposites indicates that poor interaction occurred between NFH and PLA/rLDPE matrix. The chemical modifications of NFH resulted positive effect on tensile and thermal properties of PLA/rLDPE/NFH biocomposites. The presence of PEMA, 3-APE, MMA, EDTA, EDTA/Enzyme and 3-APE/Enzyme have increased the tensile strength, Young‘s modulus, degree of crystallinity and thermal stability of biocomposites, whereas the elongation at break decreased. The treated PLA/rLDPE/NFH biocomposites with 3-APE/Enzyme have highest tensile strength, Young‘s modulus, and thermal stability compared to other chemical modifications of biocomposites. However, PLA/rLDPE/NFH biocomposites treated with MMA has highest degree of crystallinity. Meanwhile PLA/rLDPE/NFH biocomposites treated with EDTA exhibited highest rate of biodegradation. The better interfacial interaction between treated NFH and PLA/rLDPE matrix was proven by SEM study. The spectra FTIR indicated that the changes of functional group of treated biocomposites.

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A review on the effect of extrusion parameter on 3D printing filament diameter

2023 , Krishna Kumar Nitiyah , Luqman Musa , Mohamad Syahmie Mohamad Rasidi , Khairel Rafezi Ahmad , Shayfull Zamree Abd. Rahim , Rozyanty Rahman , Ahmad Azrem Azmi

Over the years, the extrusion technique has captured the attention of polymer industries by meeting the demand for polymer processing and fabrication of final products. Extrusion is a continuous process, and it has a lot of potential in the increasing polymer sector, especially in the three-dimensional (3D) printing sector. 3D printing is popular because the feedstock filament form is accessible and produce able. The properties of the filament used influence the printed part qualities regardless of the FDM parameters. This study provides information on how extrusion parameters affect the diameter of extruded filaments. This study reviews previous studies on the effect of varied extrusion settings on filament diameter. The review will serve as a resource for researchers in the 3D printing sector to fabricate their filaments for 3D printing. Overall, this paper will provide solutions to overcome issues in obtaining optimal filament diameters for future research projects.

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A review on the potential of polylactic acid based thermoplastic elastomer as filament material for fused deposition modelling

2022-09-01 , Luqman Musa , Krishna Kumar N. , Shayfull Zamree Abd. Rahim , Mohamad Syahmie Mohamad Rasidi , Watson Rennie A.E. , Rozyanty Rahman , Yousefi Kanani A. , Ahmad Azrem Azmi

Currently, a range of sectors are implementing three-dimensional (3D) printing, which is a part of additive manufacturing (AM) technology via the fused deposition modelling (FDM) approach. As of now, various filament materials are available in the market and have their limitations. Thermoplastic elastomer (TPE) blend as a filament material in 3D printing should be implemented to overcome the weakness of available filaments. TPE blend stands out due to its flexibility, thermoplastic-like processability, and renewability. Based on the findings, TPE blend filament can be made with polylactic acid (PLA) thermoplastic and elastomers such as natural rubber (NR) and epoxidized natural rubber (ENR). The TPE printed components will be flexible; tough with excellent thermal and mechanical properties. In this paper, the characteristics of TPE are being reviewed to show the potential of TPE material as filament.

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Effect of surface treatment on water absorption of rice husk reinforced recycled high density polyethylene (RHDPE) composites.

2021-05-03 , Mohd Nazry Salleh , Roslaili Abdul Aziz , Luqman Musa , Mohamad Syahmie Mohamad Rasidi , Mohd Fairul Sharin Abdul Razak , Hong L.Y.

The goal of this study was to investigate the effect of surface treatment on rice husk reinforced recycled high density polyethylene (rHDPE) composites. Three types of surface treatments on rice husk were carried out which were maleated treatment, alkali treatment and acrylic acid treatment. Water absorption test was examined in distilled water. It showed that the lower the loading of rice husk, the lower the water absorption percentage. Maleated treatment on rice husk reinforced rHDPE has the highest resistance of water absorption tendency. Scanning electron microscope analysis of the composites showed that the lower the rice husk loading, the better the interfacial bonding of the composites. Maleated treatment of rice husk also showed that there is no gaps formed in the structure.

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Mechanical properties of Porous Polylactic Acid (PLA) via salt leaching method

2020 , NAM Rahim , Mohamad Syahmie Mohamad Rasidi

The purpose of this research is to evaluate the properties and characterization of porous polylactic acid (PLA). The porous PLA was fabricated via salt leaching method whereas PLA was first dissolved in chloroform under mechanical stirring for 7 minutes. Then, sodium chloride (NaCl) was added into the dissolved PLA. The mixture of PLA and NaCl was then left at room temperature for 24 hours for the chloroform to be evaporated. The solidified films was then been washed under tab water to remove the NaCl content. The removal of NaCl content will lead to porous PLA. The effect of NaCl content on the mechanical and morphological properties of PLA was been studied. The increased of NaCl content shown a reduction trend for tensile properties and elongation at break. Meanwhile, the Young’s modulus had been found to increase with increasing NaCl content. The micrograph of the neat PLA showed a smooth surface at the tensile fractured surface. However, the effect of salt leaching method lead to a porous PLA as the NaCl content increased, the pores observed in the micrographs also increased. The higher the content of NaCl increashe amount of pores on the PLA and the number of interconnected pores with uniform pores morphology and well distributed pores.

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A review on graft compatibilizer for thermoplastic elastomer blend

2021-11-12 , Nitiyah K.K. , Luqman Musa , Mohamad Syahmie Mohamad Rasidi , Shayfull Zamree Abd. Rahim , Rozyanty Rahman , Ahmad Azrem Azmi , Rennie A.

A biodegradable thermoplastic elastomer (TPE) blend is developed by blending poly (lactic acid) (PLA) and natural rubber (NR) or epoxidized natural rubber (ENR) and it is a sustainable substitution in recent years for synthetic polymers. PLA is high in mechanical strength and compostable, but it is highly stiff and brittle. The incorporation of NR or ENR to PLA increases the impact strength and toughness of PLA. However, the disparity in polarity between PLA and elastomer phase like NR and ENR results in TPE blend being incompatible. Hence, compatibilization is essential to improve its polarity and develop interactions. Compatibilizer that composed of two different polymer is known is graft compatibilizer with the aid of grafting agent. The graft compatibilizers are divided into two categories. The first type is made up of one polymer and grafting agent and, the other one is composed of two polymer groups and grafting agent. These two types of graft compatibilizer can be prepared via two different method such as direct melt blending and solution. Apart from this, the TPE blend is produced via the melt blending technique with mixing machines such as internal mixer and extruder. This article has reviewed the preparation of the graft compatibilizer and blending technique of TPE. Based on the findings, the graft compatibilizers has a significant role in improving miscibility and compatibility across blend composed of different phase.

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Preparation of supported-deep eutectic solvent membranes: Effects of bath medium composition on the structure and performance of supported-deep eutectic solvent membrane for CO2/N2 gas separation

2020-05-01 , Amira Mohd Nasib , Mohd Irfan Hatim Mohamed Dzahir , Nora Jullok , Mohamad Syahmie Mohamad Rasidi

Polyvinylidene fluoride-co-polytetrafluoroethylene, PVDF-co-PTFE polymer was used as a membrane support. The asymmetric membranes were formed by immersion of casted membrane film into the coagulation bath. This work manipulated the coagulant bath medium by mixing ethanol with distilled water at different weight percentages (0, 25 and 50 wt. % of ethanol). The structures of fabricated membranes were observed to have different morphologies. Higher ethanol content altered the membrane structure from finger-like to sponge-like structure, and hence differed in membrane porosity. Vacuum-based technique was chosen to impregnate the deep eutectic solvent (DES) into the pores of membrane support. DES was prepared by mixing choline chloride (ChCl) and ethylene glycol at a ratio of 1:3. Scanning electron microscopy (SEM) was used to study the membrane morphology changes while in order to determine the immobilization of DES, energy dispersive X-ray (EDX) analysis was used. The porosity of fabricated PVDF-co-PTFE membrane was determined by means of gravimetric method. Lastly, the membrane separation performance using CO2 and N2 gasses were used to determine the capability of the supported-DES-membrane. The results demonstrated the highest immobilization of DES in supported membrane pores was achieved when combination of 25 wt. % of ethanol and 75 wt. % distilled water was used as a coagulant bath medium. The respective membrane has 74.5% porosity with the most excellent performance of CO2 separation at 25.5 x 103 GPU with CO2/N2 selectivity of 2.89.

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Effect of styrene content on structure and properties of vulcanizates from natural rubber grafted with polystyrene

2025 , Nabil Hayeemasae , Siriwat Soontaranon , Zunaida Zakaria , Mohamad Syahmie Mohamad Rasidi , Abdulhakim Masa

Graft copolymer from natural rubber grafted with polystyrene (NR-g-PS) was prepared. Influences of polystyrene (PS) content grafted on the natural rubber (NR) were investigated. Prior to compounding and compression molding to vulcanizates, the graft copolymers were prepared by emulsion polymerization. Proton nuclear magnetic resonance confirmed the chemical structure of the graft copolymer as NR-g-PS. Grafting of PS onto NR improved the tensile modulus and tensile strength of the vulcanizate, whereas the elongation at break decreased, depending on the PS content. However, a drastic reduction of tensile strength and elongation at break were seen when the PS content was greater than 20%. Compared to ungrafted NR, the onset strain for deformation-induced crystallization of graft copolymers was reduced, while the crystallinity at a given strain was higher. The improved tensile properties and crystallization ability suggest interfacial interactions of NR and PS phases. Such interactions were also responsible for improved thermal stability of the graft copolymer, having the degradation temperature increased by 17–38°C over the ungrafted NR. The best balance in overall properties was achieved by NR/PS 90/10.

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Effect of dispersing agents on the electrical and mechanical performance of GNPs filled epoxy nanocomposite

2023-07 , Wong Wee Chun , Teh Pei Leng , Yeoh Cheow Keat , Azlin Fazlina Osman , Lim Bee Ying , Mohamad Syahmie Mohamad Rasidi

In this work, graphene nanoplatelets (GNPs) filled epoxy nanocomposites with the addition of different dispersing agents were fabricated using a method combines mechanical mixing and tip sonication. The loading of GNPs used is 0.8 vol% determined previously as the amount required to achieve the percolation threshold to conduct electricity. Three dispersing agents were used in this work: Sodium dodecyl sulphate (SDS), ethanol and Phenyl glycidyl ether (PGE), with loadings varying from 2 vol% to 10 vol%. The incorporation of dispersing agent enhanced the electrical bulk conductivity of GNPs filled nanocomposites. The mechanical performance (flexural properties and fracture toughness) of the nanocomposite were evaluated and compared. The optimum loading of SDS to obtain the highest flexural strength and fracture toughness is 2 vol%, where further increases will deteriorate the performance of nanocomposites. On the other hand, the optimum loading of ethanol and PGE are 4 vol%. The fracture toughness of GNPs filled nanocomposites improved with the addition of 2 vol% SDS and deteriorated with increasing loadings of SDS up to 10 vol%. By incorporating 4 vol% of ethanol, the optimum fracture toughness of the nanocomposite is achieved. Fracture toughness is then dropped with further increases in ethanol. The addition of PGE caused deterioration in fracture toughness of GNPs filled epoxy nanocomposite.

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A review on the potential of polylactic acid based thermoplastic elastomer as filament material for fused deposition modelling

2022 , Luqman Musa , Nitiyah Krishna Kumar , Shayfull Zamree Abd. Rahim , Mohamad Syahmie Mohamad Rasidi , Allan Edward Watson Rennie , Rozyanty Rahman , Armin Yousefi Kanani , Ahmad Azrem Azmi

Currently, a range of sectors are implementing three-dimensional (3D) printing, which is a part of additive manufacturing (AM) technology via the fused deposition modelling (FDM) approach. As of now, various filament materials are available in the market and have their limitations. Thermoplastic elastomer (TPE) blend as a filament material in 3D printing should be implemented to overcome the weakness of available filaments. TPE blend stands out due to its flexibility, thermoplastic-like processability, and renewability. Based on the findings, TPE blend filament can be made with polylactic acid (PLA) thermoplastic and elastomers such as natural rubber (NR) and epoxidized natural rubber (ENR). The TPE printed components will be flexible; tough with excellent thermal and mechanical properties. In this paper, the characteristics of TPE are being reviewed to show the potential of TPE material as filament.

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