Amira Mohd Nasib
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Preferred name
Amira Mohd Nasib
Official Name
Amira, Mohd Nasib
Alternative Name
Nasib, Amira Mohd
Nasib, A. M.
Nasib, Amira
Main Affiliation
Scopus Author ID
57194113561
Researcher ID
FRP-5803-2022

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  • Publication
    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.
      9  36
  • Publication
    Mechanical properties and biodegradability of polylactic acid/acrylonitrile butadiene styrene with cellulose particle isolated from Nypa fruticans husk
    (Universiti Malaysia Pahang Al-Sultan Abdullah Press, 2020)
    Mohamad Syahmie Mohamad Rasidi
    ;
    L. C. Cheah
    ;
    Amira Mohd Nasib
    Polylactic acid is a biodegradable polymer derived from renewable resources, showing potentials in replacing traditional petroleum-based polymers, yet its brittleness limits its applications. Thus, blending polylactic acid with acrylonitrile butadiene styrene as well as incorporation of fillers were used to enhance the mechanical and biodegradability properties of polylactic acid by extrusion compounding. The aims of this study to produce and investigate PLA/ABS blend incorporated with natural filler, NFH and IC to improve the properties pf PLA/ABS blends. Two types of fillers used were Nypa fruticans husk and isolated cellulose from Nypa fruticans husk which was obtained by using Soxhlet extraction. Transform Infrared spectroscopy analysis was used to characterize and verified the extracted substance was isolate cellulose. Tensile, impact and biodegradation test were conducted to investigate the mechanical and biodegradability properties. The optimum blend ratio for polylactic acid/acrylonitrile was 75/25 php base on previous studies, and it was found that the incorporation of both fillers, Nypa fruticans husk and isolated cellulose from Nypa fruticans husk had decreased the tensile strength, elongation at break and impact strength of the composite however increased the Young’s Modulus and biodegradation weight loss. Meanwhile, at similar filler content, the tensile strength, Young’s modulus and biodegradation weight loss of polylactic acid/acrylonitrile butadiene styrene blend incorporated with isolated cellulose were higher value compared to polylactic acid/acrylonitrile butadiene styrene blend incorporated Nypa fruticans husk. Furthermore, morphological studies showed a well-coated filler by matrix and reduction of filler pull out when isolated cellulose was incorporated in polylactic acid/acrylonitrile butadiene styrene blend. Therefore, it was found that the incorporation of isolated cellulose in polylactic acid/acrylonitrile butadiene styrene blend, shows higher mechanical and biodegradation properties than polylactic acid/acrylonitrile butadiene styrene blend incorporated with Nypa fruticans husk.
      4  9
  • Publication
    Fabrication of biodegradable Polylactic Acid (PLA) membrane for reverse osmosis process
    ( 2023)
    Amira Mohd Nasib
    ;
    Nuratiqah Baharudin
    ;
    Nora Jullok
    ;
    Mohamad Syahmie Mohamad Rasidi
    ;
    Juhana Jaafar
    Polylactic Acid (PLA) is a pronounced biodegradable polymer which has been developed to be used in a broad range of applications due to its biocompatibility and would be able to solve the problems suffered from commercial polymeric membrane used in reverse osmosis (RO). Asymmetric flat sheet PLA membrane were fabricated via phase inversion technique using non-solvent induced phase separation (NIPS). Different weight % ratio of ethanol and water as a coagulant bath medium (0:100, 20:80, 40:60, 80:20 and 100:0) were varied to investigate the effect of different membrane microstructure of the PLA membrane performance in reverse osmosis process. The prepared membranes were characterized through several characterizations and undergo the performance test using dead end filtration. Increasing ethanol contents resulted in higher porosity and lower contact angle due to forming of pores sparsely on the membrane surface. The morphologies of membrane top surface was strongly affected by the medium of coagulant bath. Two membranes fabricated using 40 wt,% and 80 wt.% ethanol as a coagulant bath were carried out with performance test. The findings revealing the highest water flux and permeability was shown by a membrane fabricated from 80 wt. % of ethanol and 20 wt. % of distilled water. It was also found that the respective membrane showed the highest salt rejection capability.
      2  27