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Your search keyword '"Zulfida Mohamad Hafis Mohd Shafie"' showing total 4 results
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4 results on '"Zulfida Mohamad Hafis Mohd Shafie"'

1. Preliminary Study of Emulsion Liquid Membrane Formulation on Acetaminophen Removal from the Aqueous Phase

Author

Abdul Latif Ahmad, Zulfida Mohamad Hafis Mohd Shafie, Nur Dina Zaulkiflee, and Wen Yu Pang

Subjects
emulsion liquid membrane, formulation, acetaminophen, Chemical technology, TP1-1185, Chemical engineering, TP155-156
Abstract

The aim of this study is to develop an Emulsion Liquid Membrane (ELM) system for the extraction of acetaminophen (ACTP). Firstly, ELM was formulated by the screening of liquid membrane components where the compatibility of diluent with other membrane phase components was investigated. The chosen carrier, diluent and stripping solution must comply with the reaction at the interface of the membrane to support the simultaneous processes of extraction and stripping. Therefore, parameters such as stripping agent concentration, volume ratio, initial concentration of feed phase and HCl concentration were investigated. A stable emulsion and maximum acetaminophen removal efficiency of 85% was achieved.

Published
2019
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2. Preliminary Study on the Compatibility of P84 Polyimide (PI) Coated Polymethylpentene (PMP) Thin Composite Membrane

Author

Zulfida Mohamad Hafis Mohd Shafie, Abdul Latif Ahmad, Siew Chun Low, Sabine Rode, Bouchra Belaissaoui, Laboratoire Réactions et Génie des Procédés (LRGP), and Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI]Engineering Sciences [physics], [CHIM.MATE]Chemical Sciences/Material chemistry, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2020

3. Lithium chloride (LiCl)-modified polyethersulfone (PES) substrate surface pore architectures on thin poly(dimethylsiloxane) (PDMS) dense layer formation and the composite membrane's performance in gas separation

Author

Sabine Rode, Zulfida Mohamad Hafis Mohd Shafie, Bouchra Belaissaoui, Siew Chun Low, Abdul Latif Ahmad, Laboratoire Réactions et Génie des Procédés (LRGP), and Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL)

Subjects
Materials science, General Chemical Engineering, 02 engineering and technology, General Chemistry, Permeance, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], Membrane, chemistry, Chemical engineering, Coating, engineering, Lithium chloride, Gas separation, 0210 nano-technology, Porosity, Layer (electronics), Phase inversion, ComputingMilieux_MISCELLANEOUS
Abstract

The use of pore forming agents has been notable for improving the water flux in a water-based separation membrane but are rarely being studied as a methodology to influence the substrate's surface architectures for composite membrane fabrication in gas separation. In this study, the influence of lithium chloride (LiCl) on the surface pore architectures and hence, the gas permeance, has been studied in both bare and composite forms with poly(dimethylsiloxane) (PDMS). 1–4 wt% of LiCl was mixed with the dope solution of PES/NMP in the ratio 0.19 and was casted via the dry–wet phase inversion method. Bare substrates were noted to possess increasingly larger surface pore sizes but at a diminishing surface pore density with maximum surface porosity at 2 wt% LiCl. The permeances were, however, significantly reduced with the increase in the LiCl content from 105 300 to 4300 GPU for N2 gas, presumably due to the thicker skin layer. Nevertheless, the porous surface morphology was confirmed and exhibited Knudsen selectivity with a CO2/N2 selectivity of about 0.8, signifying minimal gas flow resistance by the substrates. Upon coating with a similar amount of thin PDMS layer, the composite permeances retain the same trend with values from 361.9 GPU for 0 wt% LiCl substrates to 68.8 GPU for 4 wt% LiCl substrates for CO2 gas at a consistent selectivity of about 14. As the PDMS layer of the same volumes were used and no significant difference in the coating thickness was noted, the mixed influence of pore intrusion and lateral diffusion is hypothesised at the substrate–coating interface owing to the different surface pore architectures of the substrates.

Published
2020
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4. Effect of Air Gap Distance on PES/PVA Hollow Fibre Membrane's Morphology and Performance.

Author

Ahmad, Abdul Latif and Zulfida Mohamad Hafis Mohd Shafie

Subjects
*POLYETHERSULFONE, *POLYVINYL alcohol, *HOLLOW fibers, *PERMEATION tubes, *AIR gap (Engineering)
Abstract

New formulation of polyether sulfone (PES)/polyvinyl alcohol (PVA) hollow fibre (HF) membranes were spun at different air gap distances to study the effect on membrane's morphology and performance. Four different air gap distances (5, 10, 15 and 20 cm) were investigated. The results suggested that air gap played a significant role in determining the circularity of inner lumen and the dimension of the fibres, with oval lumen formed at low air gap of 5 cm and became circular at higher air gap distance. Membrane dimensions were reduced with increasing air gap distance, with the outer diameter shrank from 0.881 ± 0.004 mm at 5 cm air gap down to 0.724 ± 0.008 mm at 20 cm air gap, and inner lumen diameter shrank from 0.564 ± 0.003 mm at 5 cm air gap down to 0.464 ± 0.005 mm at 20 cm air gap. On top of that, the flux and foulant rejection could be altered when using similarly formulated membrane spun at different air gap distance. After 30 min of hydraulic compaction and 1 h of deionised water permeation, maximum water flux was noted at 42.32 ± 0.12 kg/m2.h for HF spun at the air gap of 15 cm. Similar trend was noted after another 1 h of humic acid permeation as model foulant, with maximum flux found at 42.86 ± 0.09 kg/m2.h for the same membrane sample at 15 cm air gap. Nevertheless, rejection was found to be the highest for HF spun at 5 cm air gap with 94.63 ± 2.13% humic acid rejection. [ABSTRACT FROM AUTHOR]

Published
2017
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