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Rey-may Liou - One of the best experts on this subject based on the ideXlab platform.
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effect of ammonium groups of sulfonated Polysulfone Membrane on its pervaporation performance
Desalination, 2011Co-Authors: Rey-may Liou, Mu-ya Hung, Shih-hsiung Chen, Chenghsien HuangAbstract:Ammonium-exchanged Membranes were prepared and utilized for the dehydration of ethanol/water mixtures by pervaporation. This paper presents an original investigation on the influence of the ammonium content on the hydrophilic and swelling properties of ion-exchange Membranes. The identification of ammonium was carried out by infrared ray (IR) spectroscopy. It was found that the content of ammonium did not significantly change the Membrane surface morphology but considerably decreased the water contact angle for the Membranes. The optimum ammonium substitution in the Membrane resulted in a high pervaporation performance for the dehydration of ethanol solution. More than 99% of permeate water was obtained in the pervaporation process. Based on the sorption and diffusion mechanism discussion, the high selectivity of water to ethanol was mainly contributed by the diffusion rate difference of permeants in the Membrane rather than the sorption. The hydrophilicity improvement and decrease in swelling of modified Membranes contributed to the high selectivity of ion-exchanged Membranes for pervaporation. An excellent dehydration performance of ion-exchanged Membranes was observed. All the PSI values of the ion-exchanged Membrane were higher than 105, which could be attributed to the suitable conditions applied for preparing ion-exchanged Polysulfone Membranes.
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Embedded nano-iron Polysulfone Membrane for dehydration of the ethanol/water mixtures by pervaporation
Desalination, 2008Co-Authors: Shih-hsiung Chen, Mu-ya Hung, Rey-may Liou, Mei-hui Tsai, Shih-liang HuangAbstract:Embedded nano-iron Polysulfone Membranes were prepared for dehydration of ethanol/water mixtures by pervaporation. It was found that the nano-iron particle can be prepared by in-situ thermal decomposition method in casting solution. The verification of the nano-particle dispersion in Membrane was made by TEM measurement. It was found that the embedding nano-particle slightly increased the flux with the ordering polymer chains arrangement in Membrane and also increased the separation factor. A remarkable enhancement in the separation factor of over 1000 can also be found in embedded Membranes. But the flux of embedded Membranes are lower (less than 350 g/m 2 -h) than the flux of non-embedded Polysulfone Membranes (500 g/m 2 -h). The increase in the separation factor of embedding Membranes mainly contributed by the ordering/packing of polymer chains was caused by the surface effect of nano particle and limited the permeate diffusion behavior. On the other hand, it was found that the nano-particle embedding in the Membrane showed a significant effect on the sorption behavior and presented a significant interaction between water and the embedded Membrane. In this study, the high performance dehydration Membranes were successfully prepared with nano-particle embedding in Polysulfone Membranes.
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Pervaporation separation of a water/ethanol mixture by a sodium sulfonate Polysulfone Membrane
Journal of Applied Polymer Science, 2003Co-Authors: Mu-ya Hung, Shih-hsiung Chen, Rey-may LiouAbstract:A sodium sulfonate Polysulfone Membrane was prepared for the dehydration of a water/ethanol mixture by pervaporation. The separation performances of water and ethanol were examined by the testing of the ethanol/water mixture under operating conditions. The permselectivity of the sodium sulfonate Polysulfone Membrane was found to strongly depend on the sodium content in the Membrane. The sodium sulfonate ratio showed a significant influence on the hydrophilicity and diffusion behavior of the Polysulfone Membrane. Moreover, the difference in the diffusion of the permeates played an important role in the sulfonate Polysulfone Membrane. It was found that a high-performance pervaporation Membrane could be achieved with a sodium sulfonate Polysulfone Membrane. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3374–3383, 2003
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Pervaporation separation water/ethanol mixture through lithiated Polysulfone Membrane
Journal of Membrane Science, 2001Co-Authors: Shih-hsiung Chen, Rey-may Liou, Kuang-chang Yu, Dong-jong Chang, Chia-yuan ChangAbstract:Abstract For dehydrating water/ethanol mixture by pervaporation, a lithiated Polysulfone Membrane was prepared. The separation performance of water and ethanol strongly depend on the degree of lithiation of Polysulfone (PSF) Membrane. The water permeation rate decreased and separation factor increased with increasing the degree of lithiation of Polysulfone Membrane upto 0.75. Beyond the degree of substitution 0.75, the permeation rate increased and separation factor decreased with increasing the substitution. The effect of lithiation on separation performance was due to the improvement of diffusion selectivity lithiated Membrane. It was found that the diffusion selectivity was the dominant contribution to overall permselectivity. The diffusion difference between permeates through lithiated Membrane was the dominant factor for separating water/ethanol mixture.
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Pervaporation separation of water/ethanol mixture by sulfonated Polysulfone Membrane
Journal of Membrane Science, 2001Co-Authors: Shih-hsiung Chen, Kuang-chang Yu, Dong-jang Chang, Rey-may LiouAbstract:Abstract For dehydrating a water/ethanol mixture by pervaporation, a sulfonated Polysulfone Membrane was prepared. The separation performance of water and ethanol are shown to strongly depend on the degree of substitution of Polysulfone Membrane. The degree of substitution increased with increasing chlorosulfonic acid in the casting solution, and the substitution reaction was achieved within 2 h. The water permeation rate and separation factor increased with increasing substitution of Polysulfone Membrane up to a substitution of 2.0. The effect of sulfonation on separation performance was due to the improvement of hydrophilicity of sulfonated Membrane. It was found that the solubility of water/ethanol in the Membrane was not the dominant factor for separation but it was rather the diffusion difference in the Membrane. The diffusion difference between permeate through sulfonated Membrane was the dominant factor for separating the water/ethanol mixture. The high performance of pervaporation Membrane can be prepared by sulfonated Polysulfone.
Shih-hsiung Chen - One of the best experts on this subject based on the ideXlab platform.
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effect of ammonium groups of sulfonated Polysulfone Membrane on its pervaporation performance
Desalination, 2011Co-Authors: Rey-may Liou, Mu-ya Hung, Shih-hsiung Chen, Chenghsien HuangAbstract:Ammonium-exchanged Membranes were prepared and utilized for the dehydration of ethanol/water mixtures by pervaporation. This paper presents an original investigation on the influence of the ammonium content on the hydrophilic and swelling properties of ion-exchange Membranes. The identification of ammonium was carried out by infrared ray (IR) spectroscopy. It was found that the content of ammonium did not significantly change the Membrane surface morphology but considerably decreased the water contact angle for the Membranes. The optimum ammonium substitution in the Membrane resulted in a high pervaporation performance for the dehydration of ethanol solution. More than 99% of permeate water was obtained in the pervaporation process. Based on the sorption and diffusion mechanism discussion, the high selectivity of water to ethanol was mainly contributed by the diffusion rate difference of permeants in the Membrane rather than the sorption. The hydrophilicity improvement and decrease in swelling of modified Membranes contributed to the high selectivity of ion-exchanged Membranes for pervaporation. An excellent dehydration performance of ion-exchanged Membranes was observed. All the PSI values of the ion-exchanged Membrane were higher than 105, which could be attributed to the suitable conditions applied for preparing ion-exchanged Polysulfone Membranes.
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Embedded nano-iron Polysulfone Membrane for dehydration of the ethanol/water mixtures by pervaporation
Desalination, 2008Co-Authors: Shih-hsiung Chen, Mu-ya Hung, Rey-may Liou, Mei-hui Tsai, Shih-liang HuangAbstract:Embedded nano-iron Polysulfone Membranes were prepared for dehydration of ethanol/water mixtures by pervaporation. It was found that the nano-iron particle can be prepared by in-situ thermal decomposition method in casting solution. The verification of the nano-particle dispersion in Membrane was made by TEM measurement. It was found that the embedding nano-particle slightly increased the flux with the ordering polymer chains arrangement in Membrane and also increased the separation factor. A remarkable enhancement in the separation factor of over 1000 can also be found in embedded Membranes. But the flux of embedded Membranes are lower (less than 350 g/m 2 -h) than the flux of non-embedded Polysulfone Membranes (500 g/m 2 -h). The increase in the separation factor of embedding Membranes mainly contributed by the ordering/packing of polymer chains was caused by the surface effect of nano particle and limited the permeate diffusion behavior. On the other hand, it was found that the nano-particle embedding in the Membrane showed a significant effect on the sorption behavior and presented a significant interaction between water and the embedded Membrane. In this study, the high performance dehydration Membranes were successfully prepared with nano-particle embedding in Polysulfone Membranes.
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Pervaporation separation of a water/ethanol mixture by a sodium sulfonate Polysulfone Membrane
Journal of Applied Polymer Science, 2003Co-Authors: Mu-ya Hung, Shih-hsiung Chen, Rey-may LiouAbstract:A sodium sulfonate Polysulfone Membrane was prepared for the dehydration of a water/ethanol mixture by pervaporation. The separation performances of water and ethanol were examined by the testing of the ethanol/water mixture under operating conditions. The permselectivity of the sodium sulfonate Polysulfone Membrane was found to strongly depend on the sodium content in the Membrane. The sodium sulfonate ratio showed a significant influence on the hydrophilicity and diffusion behavior of the Polysulfone Membrane. Moreover, the difference in the diffusion of the permeates played an important role in the sulfonate Polysulfone Membrane. It was found that a high-performance pervaporation Membrane could be achieved with a sodium sulfonate Polysulfone Membrane. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3374–3383, 2003
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Pervaporation separation water/ethanol mixture through lithiated Polysulfone Membrane
Journal of Membrane Science, 2001Co-Authors: Shih-hsiung Chen, Rey-may Liou, Kuang-chang Yu, Dong-jong Chang, Chia-yuan ChangAbstract:Abstract For dehydrating water/ethanol mixture by pervaporation, a lithiated Polysulfone Membrane was prepared. The separation performance of water and ethanol strongly depend on the degree of lithiation of Polysulfone (PSF) Membrane. The water permeation rate decreased and separation factor increased with increasing the degree of lithiation of Polysulfone Membrane upto 0.75. Beyond the degree of substitution 0.75, the permeation rate increased and separation factor decreased with increasing the substitution. The effect of lithiation on separation performance was due to the improvement of diffusion selectivity lithiated Membrane. It was found that the diffusion selectivity was the dominant contribution to overall permselectivity. The diffusion difference between permeates through lithiated Membrane was the dominant factor for separating water/ethanol mixture.
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Pervaporation separation of water/ethanol mixture by sulfonated Polysulfone Membrane
Journal of Membrane Science, 2001Co-Authors: Shih-hsiung Chen, Kuang-chang Yu, Dong-jang Chang, Rey-may LiouAbstract:Abstract For dehydrating a water/ethanol mixture by pervaporation, a sulfonated Polysulfone Membrane was prepared. The separation performance of water and ethanol are shown to strongly depend on the degree of substitution of Polysulfone Membrane. The degree of substitution increased with increasing chlorosulfonic acid in the casting solution, and the substitution reaction was achieved within 2 h. The water permeation rate and separation factor increased with increasing substitution of Polysulfone Membrane up to a substitution of 2.0. The effect of sulfonation on separation performance was due to the improvement of hydrophilicity of sulfonated Membrane. It was found that the solubility of water/ethanol in the Membrane was not the dominant factor for separation but it was rather the diffusion difference in the Membrane. The diffusion difference between permeate through sulfonated Membrane was the dominant factor for separating the water/ethanol mixture. The high performance of pervaporation Membrane can be prepared by sulfonated Polysulfone.
M K Purkait - One of the best experts on this subject based on the ideXlab platform.
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increase in hydrophilicity of Polysulfone Membrane using polyethylene glycol methyl ether
Journal of Membrane Science, 2013Co-Authors: Manish Kumar Sinha, M K PurkaitAbstract:Abstract Flat sheet asymmetric polymeric Membranes were prepared from homogeneous solution of Polysulfone (PSF) by the phase inversion method using N-methyl-2-pyrrolidone (NMP) as solvents. Polyethylene glycol methyl ether (PEGME) of three different molecular weights (550 Da, 2000 Da and 5000 Da) was used as the polymeric additive in the casting solution. The morphology and structure of the resulting Membranes were observed by field emission scanning electron microscope (FESEM). The pore number, pore permeability and their distribution and average pore size of the Membranes were determined by the liquid–liquid displacement porosimetry (LLDP) method. The permeation performances of the Membranes were evaluated in terms of pure water flux (PWF), hydraulic permeability, and solute rejection, while hydrophilicity was evaluated in terms of porosity, equilibrium water content (EWC) and water contact angle. Solution of bovine serum albumin (BSA) of molecular weight 68,000 Da was used to study the permeation performance of prepared Membranes using a batch Membrane cell of 350 mL capacity. Results showed that with increase in molecular weight of PEGME, the pore number as well as pore area in Membranes increased. Membranes with PEGME of higher molecular weights have higher PWF and higher hydraulic permeability due to high porosity. With increase in molecular weight of PEGME from 550 to 5000, the PWF increased from 17.5 to 227.8 Lm−2 h−1. Similarly, EWC increased from 59.7% for PEGME 550 to 70.8% for PEGME 5000 Membranes. Contact angle was also decreased from 71° for PEGME 550 to 47° for PEGME 5000.
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ultrafiltration of stable oil in water emulsion by Polysulfone Membrane
Journal of Membrane Science, 2008Co-Authors: B Chakrabarty, Aloke Kumar Ghoshal, M K PurkaitAbstract:Abstract This paper focuses on treatment of oily wastewater coming out from the post-treatment unit of petroleum industries where finely divided oil droplets are uniformly dispersed in large volumes of water. Polysulfone (PSf) Membranes which had been modified for higher porosity and hydrophilicity through the use of additives such as polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) were used for removal of oil from the oily wastewater. The performances of different PSf Membranes were evaluated by treating with pure water as well as with laboratory made oil-in-water (o/w) emulsion. Experiments were carried out with 12 such Membranes in a semi-batch filtration cell made of Teflon and the influence of operating conditions such as transMembrane pressure and feed properties such as initial oil concentration and pH of feed solution on Membrane performance were investigated. Results show that all the parameters play a key role in permeate flux as well as percent oil separation. Also change in morphological properties of Membranes due to addition of different molecular weight PVP and PEG are found to have a significant influence on the permeate flow rate and hence subsequent oil removal. The experimental results showed that oil retentions of almost all the Membranes were over 90% and oil concentration in the permeate was below 10 mg/L, which met the requirement for discharge. It was concluded that the ultrafiltration (UF) Membranes developed in the study were reasonably resistant to fouling and hence the developed PSf Membranes may be considered feasible in treating oily wastewater.
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sem analysis and gas permeability test to characterize Polysulfone Membrane prepared with polyethylene glycol as additive
Journal of Colloid and Interface Science, 2008Co-Authors: B Chakrabarty, Aloke Kumar Ghoshal, M K PurkaitAbstract:Abstract Phase inversion method is applied to prepare flat sheet asymmetric polymeric Membranes from homogeneous solution of 12 wt% Polysulfone (PSf) with two different solvents— N -methyl-2-pyrrolidone (NMP) and dimethyl acetamide (DMAc). 5.0 wt% polyethylene glycol (PEG) of three different molecular weight (400, 6000, and 20,000 Da) is used as the polymeric additives in the casting solution. Membranes are characterized by two different techniques viz. scanning electron microscopy (SEM) and gas permeation tests. Finally, the results of both the techniques are compared with those calculated from pure water permeation tests using Hagen–Poiseuille equation. It is found that though the values obtained from all the techniques vary from each other, their trend with increase in molecular weight of PEG seems to be the same. It is seen that when molecular weight of PEG increases from 400 to 20,000 Da, the mean pore size of the prepared Membranes decreases, while the porosity and pore density show an increasing trend; the pressure normalized gas flux rises significantly and the thickness of the top layer of the prepared Membrane sheet increases.
Mu-ya Hung - One of the best experts on this subject based on the ideXlab platform.
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effect of ammonium groups of sulfonated Polysulfone Membrane on its pervaporation performance
Desalination, 2011Co-Authors: Rey-may Liou, Mu-ya Hung, Shih-hsiung Chen, Chenghsien HuangAbstract:Ammonium-exchanged Membranes were prepared and utilized for the dehydration of ethanol/water mixtures by pervaporation. This paper presents an original investigation on the influence of the ammonium content on the hydrophilic and swelling properties of ion-exchange Membranes. The identification of ammonium was carried out by infrared ray (IR) spectroscopy. It was found that the content of ammonium did not significantly change the Membrane surface morphology but considerably decreased the water contact angle for the Membranes. The optimum ammonium substitution in the Membrane resulted in a high pervaporation performance for the dehydration of ethanol solution. More than 99% of permeate water was obtained in the pervaporation process. Based on the sorption and diffusion mechanism discussion, the high selectivity of water to ethanol was mainly contributed by the diffusion rate difference of permeants in the Membrane rather than the sorption. The hydrophilicity improvement and decrease in swelling of modified Membranes contributed to the high selectivity of ion-exchanged Membranes for pervaporation. An excellent dehydration performance of ion-exchanged Membranes was observed. All the PSI values of the ion-exchanged Membrane were higher than 105, which could be attributed to the suitable conditions applied for preparing ion-exchanged Polysulfone Membranes.
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Embedded nano-iron Polysulfone Membrane for dehydration of the ethanol/water mixtures by pervaporation
Desalination, 2008Co-Authors: Shih-hsiung Chen, Mu-ya Hung, Rey-may Liou, Mei-hui Tsai, Shih-liang HuangAbstract:Embedded nano-iron Polysulfone Membranes were prepared for dehydration of ethanol/water mixtures by pervaporation. It was found that the nano-iron particle can be prepared by in-situ thermal decomposition method in casting solution. The verification of the nano-particle dispersion in Membrane was made by TEM measurement. It was found that the embedding nano-particle slightly increased the flux with the ordering polymer chains arrangement in Membrane and also increased the separation factor. A remarkable enhancement in the separation factor of over 1000 can also be found in embedded Membranes. But the flux of embedded Membranes are lower (less than 350 g/m 2 -h) than the flux of non-embedded Polysulfone Membranes (500 g/m 2 -h). The increase in the separation factor of embedding Membranes mainly contributed by the ordering/packing of polymer chains was caused by the surface effect of nano particle and limited the permeate diffusion behavior. On the other hand, it was found that the nano-particle embedding in the Membrane showed a significant effect on the sorption behavior and presented a significant interaction between water and the embedded Membrane. In this study, the high performance dehydration Membranes were successfully prepared with nano-particle embedding in Polysulfone Membranes.
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Pervaporation separation of a water/ethanol mixture by a sodium sulfonate Polysulfone Membrane
Journal of Applied Polymer Science, 2003Co-Authors: Mu-ya Hung, Shih-hsiung Chen, Rey-may LiouAbstract:A sodium sulfonate Polysulfone Membrane was prepared for the dehydration of a water/ethanol mixture by pervaporation. The separation performances of water and ethanol were examined by the testing of the ethanol/water mixture under operating conditions. The permselectivity of the sodium sulfonate Polysulfone Membrane was found to strongly depend on the sodium content in the Membrane. The sodium sulfonate ratio showed a significant influence on the hydrophilicity and diffusion behavior of the Polysulfone Membrane. Moreover, the difference in the diffusion of the permeates played an important role in the sulfonate Polysulfone Membrane. It was found that a high-performance pervaporation Membrane could be achieved with a sodium sulfonate Polysulfone Membrane. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3374–3383, 2003
T Matsuura - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of novel water soluble derivative of chitosan as an additive for Polysulfone ultrafiltration Membrane
Journal of Membrane Science, 2013Co-Authors: Rajesha Kumar, Arun M Isloor, Ahmad Fauzi Ismail, T MatsuuraAbstract:A novel water soluble Chitosan derivative N-propylphosphonic Chitosan (NPPCS) having a terminal phosphonic acid group was synthesized by reacting Chitosan with Hydroxybenzotriazole (HOBt) and propylphosphonic anhydride (T3P)® via one pot reaction. The novel derivative was characterized by 1H NMR, Attenuated Total Reflectance Infra Red (ATR-IR) spectroscopy and XRD. Due to insolubility of NPPCS in organic solvents, a new process was demonstrated for blending of NPPCS with Polysulfone. The proper blending of NPPCS with Polysulfone was confirmed by ATR-IR spectroscopy. The improved hydrophilicity of PSf/NPPCS Membranes was confirmed by contact angle measurement. The permeation studies showed increased flux of PSf/NPPCS Membranes as compared to the pristine Polysulfone Membrane. The antifouling property of PSf/NPPCS Membrane was determined by Bovine Serum Albumin (BSA) protein rejection studies. The Membranes showed the enhanced antifouling property as compared to pristine Polysulfone Membranes with a maximum of 74% flux recovery ratio (FRR) value.
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performance improvement of Polysulfone ultrafiltration Membrane using n succinyl chitosan as additive
Desalination, 2013Co-Authors: Rajesha Kumar, Arun M Isloor, Ahmad Fauzi Ismail, T MatsuuraAbstract:Abstract A water soluble chitosan derivative, N-succinyl chitosan (NSCS), was blended with Polysulfone (PSf) in three different compositions to fabricate PSf/NSCS blend Membranes. The blending of polymers was confirmed by Attenuated Total Reflectance Infra-Red (ATR-IR) spectroscopy. The Membranes were characterized by Scanning Electron Microscopy (SEM) images for their cross-sectional morphology. Pure water flux, water uptake and contact angle of the PSf/NSCS blend Membranes were measured and compared with the pristine Polysulfone Membrane. The PSf/NSCS blend Membranes showed enhanced hydrophilicity and permeation fluxes compared to the pristine Polysulfone Membrane. The Membrane antifouling property was determined by filtering the bovine serum albumin (BSA) solution. The maximum flux recovery ratio (FRR) of 70% was observed by the PSf/NSCS blend Membrane with 20% NSCS content. The PSf/NSCS Membranes with the PSf:NSCS ratios of 80:20 and 90:10 showed nearly the same fluxes as those of Polysulfone/polyethylene glycol (PSf/PEG) blend Membranes with the same compositions. The hydrophilic derivative of chitosan NSCS acted as an excellent additive in improving PSf ultrafiltration properties.