MOHAMAD SYAFIQ ABDUL WAHAB | Universiti Malaysia Pahang (UMP) (original) (raw)
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Papers by MOHAMAD SYAFIQ ABDUL WAHAB
Polymer-Plastics Technology and Materials
Journal of Physical Science, 2017
Biogas is an alternative energy from biomass. The gas can be produced from anaerobic digestion by... more Biogas is an alternative energy from biomass. The gas can be produced from anaerobic digestion by microorganism. Biomasses such as animal manure, kitchen waste, garden waste, or even human excreta are among the major sources of biogas. Usually, biogas contains 60% methane along with 40% of carbon dioxide. Besides its important role in natural gas, methane also contributes to greenhouse gases. Their presence in atmosphere will thicken earth blanket and further lead to climate change. One pound of methane traps 25 times more heat in the atmosphere compared to one pound of carbon dioxide. This research introduced a new material, Pebax 1657 to improve the current polymeric based membranes in the form of thin film composite (TFC). Polyvinylidene fluoride (PVDF) was used as a porous support layer for this TFC and this combination surpassed the Robeson 2008 trade off limit with CO 2 pressure normalise flux and selectivity of 1075 Barrer and 52.50 respectively. Besides transforming the waste into wealth, the emission of this greenhouse gases can be reduced so that a green environment and clean air can be continually enjoyed by future generations.
Vacuum, 2020
Graphene oxide (GO) was introduced in this study as a hydrophilic enhancer to polyether block ami... more Graphene oxide (GO) was introduced in this study as a hydrophilic enhancer to polyether block amide copolymer (PEBAX) in the form of thin film nanocomposite (TFNC) for hydrophobic based polysulfone (PSF) membrane. The objective is to increase hydrophilic moieties by providing more polar terminal within the TFNC network and by doing so, the film managed to completely reduce IPA traces in the permeate from 0.8 wt % while maintaining a constant flux of 1.2 kg/m2h. SEM, FTIR and water contact angle was used to characterized the produced film. The contact angle was also reduced from 77.5° to 37.48°, indicating the increment of hydrophilicity of the film. Interestingly, the GO incorporated film could take up to 38.02% of water, proving a possibility for this TFNC to be used in pervaporation.
Polymer-Plastics Technology and Materials, 2020
In this work, Graphene Oxide (GO) is embedded in both selective hydrophilic layer and porous hydr... more In this work, Graphene Oxide (GO) is embedded in both selective hydrophilic layer and porous hydrophobic substrate creating a mutual bridge between the two surfaces. Pristine 1-3 µm microporous PSF prepared via dry/wet phase inversion techniques with contact angle of 74.12° has been further study with GO embedded Pebax dense selective layer. This dual nature thin film nano composite TFNC membranes managed to reduce the water contact angle down to 37.18°. As for the IPA dehydration study, the total flux up to 1.19 kgm −2 h −1 and 0 wt% IPA detected in permeate was achieved with 20 wt% water feed at 30°C.
Surfaces and Interfaces , 2021
Polymeric membranes separation among the new and reliable separation and purification techniques ... more Polymeric membranes separation among the new and reliable separation and purification techniques in terms of energy consumption, ease of the process, and high selectivity due to polymer properties can be tailored to specific needs. This comprehensive review highlights polymeric membranes' current development, specifically on thin film nanocomposite membranes for alcohol dehydration via pervaporation (PV). Discussion on substrate choice and fillers incorporating in respective polymers and how significant both materials in PV application has been scrutinized. Recent works on Thin Film Nanocomposite (TFNC) membranes showed that there is still a gap in factors or parameters involved in TFNC synthesis, which the same old weakness of membrane swelling, flux loss, and selectivity deficit seem left to be discovered. A performance plot of IPA dehydration from recent works has been provided within this paper as a benchmark for researchers to compare their findings. This review emphasizes on finding a set of parameter and nanomaterial as a possible approach for future TFNC development.
Heliyon, 2020
A two-level full factorial design was used to analyze several factors involved in PSF-GO-Pebax th... more A two-level full factorial design was used to analyze several factors involved in PSF-GO-Pebax thin film nanocomposite membranes development. Permeate flux was chosen as a single response for four possible factors: Pebax selective layer concentration, amount of GO load to Pebax selective layer, Pebax-GO selective layer thickness, and amount of GO load to PSF substrate. The study is aimed at factors interaction and contribution towards the highest permeation flux via FFD and RSM approach. R 2 obtained from the ANOVA is 0.9937 with Pebax concentration as the highest contributing factor. Pebax concentration-amount of GO load to PSF substrate is the only interaction contributing to the highest flux. A regression analysis concluded the study with model development and an optimized condition for the membrane design.
As environmental consciousness is urge throughout the world to reduce the emission of carbon diox... more As environmental consciousness is urge throughout the world to reduce the emission of carbon dioxide (CO 2) gas, researcher has been working on a way to separate the gas and store them where they belong. CO 2 presence in atmosphere will coat the earth and trap amount of heat and further cause climate change. In this study, a mixed matrix membrane (MMM) will be produced in order to separate CO 2 gas from emitted to the atmosphere. The MMM is produced by the combination of polyvinylidene fluoride (PVDF) and Zeolite via dry/wet phase inversion technique. The invention of this MMM is expected to improve the separation performance of pure PVDF membrane. PVDF is introduced with an inorganic filler, Zeolite with ratio of N-Methyl-2-pyrrolidone (NMP) (solvent): PVDF: Zeolite 80:10:10, 80:15:5, and 80:5:15 in order to achieve the desired selectivity and permeability which will be tested on CO 2 /N 2 gas separation. From the performance view, the MMM with composition 80:15:5 are the most suitable to separate the two gases compared to pure PVDF membrane as the permeance of CO 2 and N 2 were recorded at 17631.41 GPU and 2041.30 GPU respectively at 0.5 atm. The result also unbeatable when the pressure was increased up to 1 atm, the permeance of CO 2 and N 2 are 13370.49 GPU and 4558.12 GPU respectively. These high performance samples are prove by the SEM image of the surface morphology itself. The pore diameter ranges of 0.58µm-1µm are the result of pore disruption by the zeolite nanoparticles.
Polymer is among the favorite materials used for membrane separation as they are cheap, easily ca... more Polymer is among the favorite materials used for membrane separation as they are cheap, easily cast, low maintenance cost and commercially easy to get eventhough the material needs to be altered to meet the separation industry specific needs. There are two common issues in membrane preparation which are the produced sheet are too brittle and has no strength to withstand pressure during separation process and the porosity of the sheet sometimes not suitable with the gas kinetic diameter for the separation to occur. PEBAX or Poly ether block amide is the answer for the issues as this elastomer provides good mechanical strength from the hard segment of the crystalline poly amide block while the soft polyether will drive the separation process. This unique material can be casted either by phase inversion of the PEBAX itself with other polymer or by coating them on the other polymer substrate.
Polymer is among the favorite materials used for membrane separation as they are cheap, easily c... more Polymer is among the favorite materials used for membrane separation as they are
cheap, easily cast, low maintenance cost and commercially easy to get eventhough the material
needs to be altered to meet the separation industry specific needs. There are two common issues
in membrane preparation which are the produced sheet are too brittle and has no strength to
withstand pressure during separation process and the porosity of the sheet sometimes not suitable
with the gas kinetic diameter for the separation to occur. PEBAX or Poly ether block amide is
the answer for the issues as this elastomer provides good mechanical strength from the hard
segment of the crystalline poly amide block while the soft polyether will drive the separation
process. This unique material can be casted either by phase inversion of the PEBAX itself with
other polymer or by coating them on the other polymer substrate.
Key words: PEBAX, composite membrane, substrate, elastomer.
As environmental consciousness is urge throughout the world to reduce the emission of carbon diox... more As environmental consciousness is urge throughout the world to reduce the emission of carbon dioxide (CO 2) gas, researcher has been working on a way to separate the gas and store them where they belong. CO 2 presence in atmosphere will coat the earth and trap amount of heat and further cause climate change. In this study, a mixed matrix membrane (MMM) will be produced in order to separate CO 2 gas from emitted to the atmosphere. The MMM is produced by the combination of polyvinylidene fluoride (PVDF) and Zeolite via dry/wet phase inversion technique. The invention of this MMM is expected to improve the separation performance of pure PVDF membrane. PVDF is introduced with an inorganic filler, Zeolite with ratio of N-Methyl-2-pyrrolidone (NMP) (solvent): PVDF: Zeolite 80:10:10, 80:15:5, and 80:5:15 in order to achieve the desired selectivity and permeability which will be tested on CO 2 /N 2 gas separation. From the performance view, the MMM with composition 80:15:5 are the most suitable to separate the two gases compared to pure PVDF membrane as the permeance of CO 2 and N 2 were recorded at 17631.41 GPU and 2041.30 GPU respectively at 0.5 atm. The result also unbeatable when the pressure was increased up to 1 atm, the permeance of CO 2 and N 2 are 13370.49 GPU and 4558.12 GPU respectively. These high performance samples are prove by the SEM image of the surface morphology itself. The pore diameter ranges of 0.58µm-1µm are the result of pore disruption by the zeolite nanoparticles.
Polymer-Plastics Technology and Materials
Journal of Physical Science, 2017
Biogas is an alternative energy from biomass. The gas can be produced from anaerobic digestion by... more Biogas is an alternative energy from biomass. The gas can be produced from anaerobic digestion by microorganism. Biomasses such as animal manure, kitchen waste, garden waste, or even human excreta are among the major sources of biogas. Usually, biogas contains 60% methane along with 40% of carbon dioxide. Besides its important role in natural gas, methane also contributes to greenhouse gases. Their presence in atmosphere will thicken earth blanket and further lead to climate change. One pound of methane traps 25 times more heat in the atmosphere compared to one pound of carbon dioxide. This research introduced a new material, Pebax 1657 to improve the current polymeric based membranes in the form of thin film composite (TFC). Polyvinylidene fluoride (PVDF) was used as a porous support layer for this TFC and this combination surpassed the Robeson 2008 trade off limit with CO 2 pressure normalise flux and selectivity of 1075 Barrer and 52.50 respectively. Besides transforming the waste into wealth, the emission of this greenhouse gases can be reduced so that a green environment and clean air can be continually enjoyed by future generations.
Vacuum, 2020
Graphene oxide (GO) was introduced in this study as a hydrophilic enhancer to polyether block ami... more Graphene oxide (GO) was introduced in this study as a hydrophilic enhancer to polyether block amide copolymer (PEBAX) in the form of thin film nanocomposite (TFNC) for hydrophobic based polysulfone (PSF) membrane. The objective is to increase hydrophilic moieties by providing more polar terminal within the TFNC network and by doing so, the film managed to completely reduce IPA traces in the permeate from 0.8 wt % while maintaining a constant flux of 1.2 kg/m2h. SEM, FTIR and water contact angle was used to characterized the produced film. The contact angle was also reduced from 77.5° to 37.48°, indicating the increment of hydrophilicity of the film. Interestingly, the GO incorporated film could take up to 38.02% of water, proving a possibility for this TFNC to be used in pervaporation.
Polymer-Plastics Technology and Materials, 2020
In this work, Graphene Oxide (GO) is embedded in both selective hydrophilic layer and porous hydr... more In this work, Graphene Oxide (GO) is embedded in both selective hydrophilic layer and porous hydrophobic substrate creating a mutual bridge between the two surfaces. Pristine 1-3 µm microporous PSF prepared via dry/wet phase inversion techniques with contact angle of 74.12° has been further study with GO embedded Pebax dense selective layer. This dual nature thin film nano composite TFNC membranes managed to reduce the water contact angle down to 37.18°. As for the IPA dehydration study, the total flux up to 1.19 kgm −2 h −1 and 0 wt% IPA detected in permeate was achieved with 20 wt% water feed at 30°C.
Surfaces and Interfaces , 2021
Polymeric membranes separation among the new and reliable separation and purification techniques ... more Polymeric membranes separation among the new and reliable separation and purification techniques in terms of energy consumption, ease of the process, and high selectivity due to polymer properties can be tailored to specific needs. This comprehensive review highlights polymeric membranes' current development, specifically on thin film nanocomposite membranes for alcohol dehydration via pervaporation (PV). Discussion on substrate choice and fillers incorporating in respective polymers and how significant both materials in PV application has been scrutinized. Recent works on Thin Film Nanocomposite (TFNC) membranes showed that there is still a gap in factors or parameters involved in TFNC synthesis, which the same old weakness of membrane swelling, flux loss, and selectivity deficit seem left to be discovered. A performance plot of IPA dehydration from recent works has been provided within this paper as a benchmark for researchers to compare their findings. This review emphasizes on finding a set of parameter and nanomaterial as a possible approach for future TFNC development.
Heliyon, 2020
A two-level full factorial design was used to analyze several factors involved in PSF-GO-Pebax th... more A two-level full factorial design was used to analyze several factors involved in PSF-GO-Pebax thin film nanocomposite membranes development. Permeate flux was chosen as a single response for four possible factors: Pebax selective layer concentration, amount of GO load to Pebax selective layer, Pebax-GO selective layer thickness, and amount of GO load to PSF substrate. The study is aimed at factors interaction and contribution towards the highest permeation flux via FFD and RSM approach. R 2 obtained from the ANOVA is 0.9937 with Pebax concentration as the highest contributing factor. Pebax concentration-amount of GO load to PSF substrate is the only interaction contributing to the highest flux. A regression analysis concluded the study with model development and an optimized condition for the membrane design.
As environmental consciousness is urge throughout the world to reduce the emission of carbon diox... more As environmental consciousness is urge throughout the world to reduce the emission of carbon dioxide (CO 2) gas, researcher has been working on a way to separate the gas and store them where they belong. CO 2 presence in atmosphere will coat the earth and trap amount of heat and further cause climate change. In this study, a mixed matrix membrane (MMM) will be produced in order to separate CO 2 gas from emitted to the atmosphere. The MMM is produced by the combination of polyvinylidene fluoride (PVDF) and Zeolite via dry/wet phase inversion technique. The invention of this MMM is expected to improve the separation performance of pure PVDF membrane. PVDF is introduced with an inorganic filler, Zeolite with ratio of N-Methyl-2-pyrrolidone (NMP) (solvent): PVDF: Zeolite 80:10:10, 80:15:5, and 80:5:15 in order to achieve the desired selectivity and permeability which will be tested on CO 2 /N 2 gas separation. From the performance view, the MMM with composition 80:15:5 are the most suitable to separate the two gases compared to pure PVDF membrane as the permeance of CO 2 and N 2 were recorded at 17631.41 GPU and 2041.30 GPU respectively at 0.5 atm. The result also unbeatable when the pressure was increased up to 1 atm, the permeance of CO 2 and N 2 are 13370.49 GPU and 4558.12 GPU respectively. These high performance samples are prove by the SEM image of the surface morphology itself. The pore diameter ranges of 0.58µm-1µm are the result of pore disruption by the zeolite nanoparticles.
Polymer is among the favorite materials used for membrane separation as they are cheap, easily ca... more Polymer is among the favorite materials used for membrane separation as they are cheap, easily cast, low maintenance cost and commercially easy to get eventhough the material needs to be altered to meet the separation industry specific needs. There are two common issues in membrane preparation which are the produced sheet are too brittle and has no strength to withstand pressure during separation process and the porosity of the sheet sometimes not suitable with the gas kinetic diameter for the separation to occur. PEBAX or Poly ether block amide is the answer for the issues as this elastomer provides good mechanical strength from the hard segment of the crystalline poly amide block while the soft polyether will drive the separation process. This unique material can be casted either by phase inversion of the PEBAX itself with other polymer or by coating them on the other polymer substrate.
Polymer is among the favorite materials used for membrane separation as they are cheap, easily c... more Polymer is among the favorite materials used for membrane separation as they are
cheap, easily cast, low maintenance cost and commercially easy to get eventhough the material
needs to be altered to meet the separation industry specific needs. There are two common issues
in membrane preparation which are the produced sheet are too brittle and has no strength to
withstand pressure during separation process and the porosity of the sheet sometimes not suitable
with the gas kinetic diameter for the separation to occur. PEBAX or Poly ether block amide is
the answer for the issues as this elastomer provides good mechanical strength from the hard
segment of the crystalline poly amide block while the soft polyether will drive the separation
process. This unique material can be casted either by phase inversion of the PEBAX itself with
other polymer or by coating them on the other polymer substrate.
Key words: PEBAX, composite membrane, substrate, elastomer.
As environmental consciousness is urge throughout the world to reduce the emission of carbon diox... more As environmental consciousness is urge throughout the world to reduce the emission of carbon dioxide (CO 2) gas, researcher has been working on a way to separate the gas and store them where they belong. CO 2 presence in atmosphere will coat the earth and trap amount of heat and further cause climate change. In this study, a mixed matrix membrane (MMM) will be produced in order to separate CO 2 gas from emitted to the atmosphere. The MMM is produced by the combination of polyvinylidene fluoride (PVDF) and Zeolite via dry/wet phase inversion technique. The invention of this MMM is expected to improve the separation performance of pure PVDF membrane. PVDF is introduced with an inorganic filler, Zeolite with ratio of N-Methyl-2-pyrrolidone (NMP) (solvent): PVDF: Zeolite 80:10:10, 80:15:5, and 80:5:15 in order to achieve the desired selectivity and permeability which will be tested on CO 2 /N 2 gas separation. From the performance view, the MMM with composition 80:15:5 are the most suitable to separate the two gases compared to pure PVDF membrane as the permeance of CO 2 and N 2 were recorded at 17631.41 GPU and 2041.30 GPU respectively at 0.5 atm. The result also unbeatable when the pressure was increased up to 1 atm, the permeance of CO 2 and N 2 are 13370.49 GPU and 4558.12 GPU respectively. These high performance samples are prove by the SEM image of the surface morphology itself. The pore diameter ranges of 0.58µm-1µm are the result of pore disruption by the zeolite nanoparticles.