Polyethersulfone/polyacrylonitrile blended ultrafiltration membranes: preparation, morphology and filtration properties

2016 ◽  
Vol 74 (3) ◽  
pp. 738-748 ◽  
Author(s):  
Mehmet Emin Pasaoglu ◽  
Serkan Guclu ◽  
Ismail Koyuncu
Keyword(s):  
Pure Water ◽  
Mechanical Analysis ◽  
Contact Angles ◽  
Water Filtration ◽  
Coagulation Bath ◽  
Inversion Method ◽  
Research Subjects ◽  
Pore Former ◽  
Uf Membranes ◽  
Filtration Properties

Polyethersulfone (PES)/polyacrylonitrile (PAN) membranes have been paid attention among membrane research subjects. However, very few studies are included in the literature. In our study, asymmetric ultrafiltration (UF) membranes were prepared from blends of PES/PAN with phase inversion method using water as coagulation bath. Polyvinylpyrrolidone (PVP) with Mw of 10,000 Da was used as pore former agent. N,N-dimethylformamide was used as solvent. The effects of different percentage of PVP and PES/PAN composition on morphology and water filtration properties were investigated. Membrane performances were examined using pure water and lake water filtration studies. Performances of pure water were less with the addition of PAN into the PES polymer casting solutions. However, long-term water filtration tests showed that PES/PAN blend membranes anti-fouling properties were much higher than the neat PES membranes. The contact angles of PES/PAN membranes were lower than neat PES membranes because of PAN addition in PES polymer casting solutions. Furthermore, it was found that PES/PAN blend UF membranes' dynamic mechanical analysis properties in terms of Young's modules were less than neat PES membrane because of decreasing amount of PES polymer.

Performance of PSf Ultrafiltration Membrane: Effect of Different Nonsolvent on Coagulation Medium

2013 ◽  
Vol 65 (4) ◽  
Author(s):  
Muhamad Fikri Shohur ◽  
Zawati Harun ◽  
W. J. Lau ◽  
Muhamad Zaini Yunos ◽  
Mohd Riduan Jamalludin
Keyword(s):  
Pore Structure ◽  
Phase Inversion ◽  
Pure Water ◽  
Water Flux ◽  
Bottom Layer ◽  
Ultrafiltration Membrane ◽  
Coagulation Bath ◽  
Inversion Method ◽  
Asymmetric Membrane ◽  
Result Analysis

One of the big challenges in developing a good asymmetric membrane  is macrovoid formation that leads to reduction of rejection value.  The most common method to reduce or suppress macrovoid formation is by addition of controlled solvent to the coagulation bath. Therefore, the effect of difference coagulants based on dissolved KCl (monovalent) and dissolved Na2SO4(divalent) with different concentration onto asymmetric Polysulfone (PSf) ultrafiltration membrane was investigated in this work. The PSf ultrafiltration membranes were prepared by using phase inversion method using these two immerse aqueous solutions. The performances of membranes were evaluated via pure water flux (distilled water) and solute rejection (humic acid). Results on the cross section revealed that the structure of membrane show a straight pattern of bigger finger-like pore structure from top to bottom layer tend to reduce with at the same time the diameter of finger-like pore structure  also increased, as salt medium of coagulant increases. These obviously shown by permeation values for both salt mediums were higher compared to without salt coagulant. This reduction of finger-like structure at bottom layer occurred along together with the formation of sponge shape structure. The growth of thick sponge shape is strongly influence by kinetic phase inversion of salt coagulant that also creates resistance to permeation mechanism. However the intense salt coagulant medium can cause the bigger sponge structure that will slightly reduce rejection and increase the permeation.  This was proved by the rejection of KCl medium started to increase at 1-3% but slightly reduced at 4%. Based on the result analysis demonstrated that the ideal membrane with highest rejection and good permeation values was membrane immersed into 1% Na2SO4 coagulation medium.

Effect of PVP concentration on prepared PEI membranes for potential use on water treatment: effect of additive on membranes prepared for water treatment

2019 ◽  
Vol 19 (7) ◽  
pp. 2072-2078 ◽  
Author(s):  
Öykü Mutlu Salmanli ◽  
Sevgi Güneş Durak ◽  
Güler Türkoğlu Demirkol ◽  
Neşe Tüfekci
Keyword(s):  
Water Treatment ◽  
Removal Rate ◽  
Contact Angles ◽  
Coagulation Bath ◽  
Inversion Method ◽  
Membrane Morphology ◽  
Ft Ir ◽  
And Performance ◽  
Phase Inversion Method ◽  
Potential Use

Abstract In this work, a series of polyetherimide (PEI) flat sheet membranes were produced with different concentrations of polyvinylpyrrolidone (PVP) addition via the phase inversion method. The effects of additions on membrane morphology and performance were investigated. Synthesized membrane had the properties of ultrafiltration membrane. Although PEI is not widely used for water treatment, in this study, the ferrous iron removal rate was investigated and good results were obtained. Through the membrane production experiments, the PEI content was 22 wt%. PVP was added as a pore-forming agent with concentrations of 2, 4 and 8 wt%. N-methyl-2-pyrrolidone (NMP) was used as solvent. Distilled water was used for the coagulation bath. After production, all membranes were characterized by using contact angle, permeability, porosity, and scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT/IR) analyses. With the increasing doses of PVP addition, the permeability of the PEI membranes produced in this study increased, while porosity results were changeable. The permeability was 23 L/m2h bar for the membrane with 2 wt% PVP content, while the permeability for the membrane with 8 wt% PVP content was 32 L/m2h bar. Contact angles increased with PVP addition to PEI membranes. With the increasing PVP concentration, the finger-like pores and the pores located in the sub-layer expanded.

Preparation and Characterization of BaBi2Nb2O9/PVDF Inorganic-Organic Composite Ultrafiltration Membranes

2013 ◽  
Vol 681 ◽  
pp. 309-313
Author(s):  
Dong Hua Zhang ◽  
Li Jing Pan ◽  
Da Zhi Sun
Keyword(s):  
Polyvinylidene Fluoride ◽  
Pure Water ◽  
Water Flux ◽  
Composite Membranes ◽  
Rejection Rate ◽  
Inversion Method ◽  
Ultrafiltration Membranes ◽  
Cross Sectional ◽  
Uf Membranes ◽  
Phase Inversion Method

BaBi2Nb2O9/PVDF (polyvinylidene fluoride) composite ultrafiltration (UF)membranes were prepared by alloying BaBi2Nb2O9 (BBN) particles uniformly in the PVDF solution (15% polymer weight) and used a phase-inversion method. This paper studied the effect of the concentration of BBN from 0% to 5% in 0.2Mpa on pure water flux and rejection rate to Bovine serum albumin (BSA). The cross-sectional structures of composite membranes were observed by scanning electron microscopy (SEM). Moreover, XRD results revealed the crystal structure of PVDF. The experimental results showed that the BBN/PVDF composite ultrafiltration membranes were superior in separation performances than the pure PVDF membranes due to the addition of BBN.

Preparation and Characterization of Ion Exchange Resin Mixed Polyethersulfone Hybrid Membranes

2009 ◽  
Vol 79-82 ◽  
pp. 1359-1362 ◽  
Author(s):  
Yu Zhong Zhang ◽  
Ru Jia ◽  
Hong Li
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Pure Water ◽  
Water Flux ◽  
Ion Exchange Resin ◽  
Coagulation Bath ◽  
Inversion Method ◽  
Hybrid Membranes ◽  
Water Permeation ◽  
Pure Water Flux

Ion exchange resin (IER) mixed polyethersulfone (PES) hybrid membranes were prepared by a phase inversion method, using polyethyleneglycol-400 (PEG-400) and polyvinyl pyrrolidone (PVP) as additives. Two different types of resin, D201 and D061, were incorporated into polyethersulfone dope solution separately with intention of producing highly permeable and hydrophilic membranes. The effect of filler on morphology, pure water permeation, and rejection of bovine serum albumin (BSA) was investigated. It was found that the morphology of hybrid membranes showed a typical asymmetry structure. The amount of IER, the concentration of additives and the temperature of coagulation bath showed to be powerful factors to influence the pore size and pure water flux. Membranes prepared from a solution containing PES concentrations from 13wt% to 15wt%, the pure water flux decreased from 244.6 to 97.5 L/(m2•h). And PVP could serve as an additive to render the hybrid membrane hydrophilic. High values of BSA rejection capacity were performed by the resin mixed polyethersulfone hybrid membranes.

Performance enhancement of polysulfone ultrafiltration membrane by blending with polyurethane hydrophilic polymer

2011 ◽  
Vol 31 (2-3) ◽  
Author(s):  
Gangasalam Arthanareeswaran ◽  
S. Velu ◽  
Loganathan Muruganandam
Keyword(s):  
Performance Enhancement ◽  
Pure Water ◽  
Water Flux ◽  
Skin Layer ◽  
Coagulation Bath ◽  
Inversion Method ◽  
Transmembrane Pressure ◽  
Molecular Weights ◽  
Casting Solution ◽  
Phase Inversion Method

Abstract The aim of this work was to study the effect of two solvents such as N,N′-dimethylformamide (DMF) and dimethylacetamide (DMAc) used in the production of polysulfone (PSf) and polyurethane (PU) blend ultrafiltration membranes, influence permeability and selectivity. PSf/PU membranes were prepared by the phase inversion method using polymer concentrations of 100/0, 20/80 and 0/100 wt%. Permeation performance of the prepared membranes was evaluated in terms of pure water flux, water content and hydraulic resistance. It was found that the membrane composed of 20/80 wt% of PSf/PU in the presence of DMAc showed a water flux of 60.5 l m-2h-1 under transmembrane pressure of 345 kPa, and the water flux of 23.5 l m-2h-1 for 20/80 wt% of PSf/PU in the presence of DMF. With increasing the polarity of DMAc in the casting solution, an increase in porous layer thickness was observed, and then a good water flux of membranes can be obtained. It was found that the polar solvent caused the rapidly demixing of casting solution in coagulation bath and formed porous asymmetric membranes with defective skin layer. The permeation rates of proteins were measured with different molecular weights of the proteins.

The Effect of Crystalline Rice Husk Silica on Polysulfone Membrane for Wastewater Treatment

2013 ◽  
Vol 328 ◽  
pp. 798-801 ◽  
Author(s):  
Zawati Harun ◽  
Muhamad Fikri Shohur ◽  
Muhamad Zaini Yunos ◽  
Mohd Riduan Jamalludin ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Rice Husk ◽  
Pure Water ◽  
Water Flux ◽  
Inversion Method ◽  
Distilled Water ◽  
Polysulfone Membrane ◽  
Rice Husk Silica ◽  
Ideal Composition ◽  
Uf Membranes ◽  
Phase Inversion Method

This study investigates the effect of additive rice husk silica and Polyethylene glycol(PEG) at different concentration on of Polysulfone (Psf) ultrafiltration (UF) membranes. The polymer membranes were prepared by a phase inversion method using Polysulfone (PSf) , N-methyl-2-pyrrolidone (NMP) as a solvent and distilled water as non-solvent. The performances of the membranes were measured in term of pure water flux by using distilled water and solute rejection at different wastewater concentration at 50%, 75% and 87.5%. The results demonstrated that the addition 2% and 3% rice husk silica give the good rejection for membranes but the best rejection was at membranes contains 3% rice husk silica where successfully do rejection of 80.5%. As a conclusion,the range between 2%-3% of rice husk silica gives the ideal composition based on the result of flux permeation and rejection.

Preparation and Characterization of Low MWCO PES/SPSF Blend Ultrafiltration Membrane

2012 ◽  
Vol 548 ◽  
pp. 87-90
Author(s):  
Qin Hou ◽  
Xiao Li Ding ◽  
Yu Zhong Zhang ◽  
Li Gang Lin ◽  
Hong Li
Keyword(s):  
Pure Water ◽  
Water Flux ◽  
Coagulation Bath ◽  
Low Molecular Weight ◽  
Membrane Performance ◽  
Phase Inversion Technique ◽  
Membrane Porosity ◽  
Pure Water Flux ◽  
Uf Membranes

The polyethersulfone/sulfonated polysolfone (PES/SPSF) blend ultrafiltration (UF) membranes with excellent performance were prepared by immersion phase inversion technique. The effects of degree of sulfonation (DS) of SPSF, PES/SPSF ratio, temperature of coagulation bath on the membrane porosity, pure water flux and rejection of PEG were investigated. The results show that the membrane performance with low molecular weight cut-off (MWCO) is excellent when the SPSF with 30% DS is added and the blending ratio of PES/SPSF is 4/1. The temperature of coagulation bath affects the structure of the membrane.

Influence of the Coagulation-Bath Temperature on Membrane Formation Mechanism and Properties of PVDF/TA-ATP Hybrid Membrane

2015 ◽  
Vol 713-715 ◽  
pp. 2723-2726
Author(s):  
Yue Rong Shi ◽  
Gui Fang Zhang ◽  
Xing Tian Liu ◽  
Xue Tao Tian ◽  
Yi Ping Zhao ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Vinylidene Fluoride ◽  
Pure Water ◽  
Water Flux ◽  
Bath Temperature ◽  
Time Domain Reflectometry ◽  
Coagulation Bath ◽  
Membrane Formation ◽  
Water Permeation ◽  
Ultrasonic Time

In this study, poly (vinylidene fluoride) (PVDF) hybrid membranes were prepared from polymeric blend of PVDF/tannic acid (TA)-Attapulgite (ATP)/PEG system via phase inversion induced by immersion precipitation in water coagulation bath. The membrane formation mechanism of PVDF/TA-ATP/PEG casting solutions in water bath thermodynamics at different temperatures and the process of membrane formation were investigated via cloud point determination and ultrasonic time-domain reflectometry (UTDR). The structures and properties of the membrane were characterized by scanning electron microscopy (SEM), and water permeation experiment, respectively. It was found that the rate of precipitation controlled by the Coagulation-Bath thermodynamics. With the coagulation temperature increasing, the gelation line was moved to non-solvent axis and the pure water flux were decreased.

scholarly journals Effect of Precipitation Temperature on the Properties of Cellulose Ultrafiltration Membranes Prepared via Immersion Precipitation with Ionic Liquid as Solvent

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 87 ◽  
Author(s):  
Daria Nevstrueva ◽  
Arto Pihlajamäki ◽  
Juha Nikkola ◽  
Mika Mänttäri
Keyword(s):  
Ionic Liquid ◽  
Pure Water ◽  
Polymer Concentration ◽  
Water Flux ◽  
Bath Temperature ◽  
Liquid Solution ◽  
Coagulation Bath ◽  
Fouling Resistance ◽  
Ultrafiltration Membranes ◽  
Coagulation Bath Temperature

Supported cellulose ultrafiltration membranes are cast from a cellulose-ionic liquid solution by the immersion precipitation technique. The effects of coagulation bath temperature and polymer concentration in the casting solution on the membrane morphology, wettability, pure water flux, molecular weight cut-off, and fouling resistance are studied. Scanning electron microscopy, contact angle measurements, atomic force microscopy, and filtration experiments are carried out in order to characterise the obtained ultrafiltration cellulose membranes. The results show the effect of coagulation bath temperature and polymer concentration on the surface morphology and properties of cellulose ultrafiltration membranes. Optimisation of the two parameters leads to the creation of dense membranes with good pure water fluxes and proven fouling resistance towards humic acid water solutions.

scholarly journals Treatment of Synthetic Produced Water using Hybrid Membrane Processes

2018 ◽  
Vol 22 (2) ◽  
Author(s):  
N. Chin ◽  
S. O. Lai ◽  
K. C. Chong ◽  
S. S. Lee ◽  
C. H. Koo ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Produced Water ◽  
Removal Rate ◽  
Pure Water ◽  
Water Flux ◽  
Transmembrane Pressure ◽  
Oil Removal ◽  
Permeate Flux ◽  
Uf Membranes ◽  
Pes Membrane

The study was concerned with the treatment of tank dewatering produced water using hybrid microfiltration (MF) and ultrafiltration (UF) processes. The pre-treatment MF membrane was fabricated with polyethersulfone (PES), n-methyl-2-pyrrolidone (NMP) and polyvinylpyrrolidone (PVP). The UF membranes meanwhile contained additional component, i.e., titanium dioxide (TiO2) nanoparticles in the range of zero to 1.0 wt.%. The membrane performances were analysed with respect to permeate flux, oil removal and flux recovery ratio. An increase in TiO2 nanoparticles enhanced the pore formation, porosity and pure water permeability due to improved hydrophilicity. The permeate flux of UF membranes increased with the increase of TiO2 nanoparticles and pressure. The oil removal rate by MF process was only 52.35%, whereas the oil rejection efficiency was between 82.34% and 95.71% for UF process. It should be highlighted that the overall oil removal rate could achieve as high as 97.96%. Based on the results, the PES membrane incorporated with 1.0 wt.% TiO2 was proved to be the most promising membrane at a transmembrane pressure of 3 bar. Although 1.0 M NaOH solution could be used as cleaning agent to recover membrane water flux, it is not capable of achieving good results as only 52.18% recovery rate was obtained.

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