Effect of PEG additive on the morphology and performance of polysulfone ultrafiltration membranes

Ma, Yuantai; Shi, Fei; Ma, Jun; Wu, Miaonan; Zhang, Jun; Gao, Congjie

doi:10.1016/j.desal.2010.12.054

Cited by 310 publications

(206 citation statements)

References 29 publications

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“…31 Where W w and W d are the mass of the wet membrane sample and the mass of the dried state (g) respectively. A, L and ρ are the sample area (cm 2 ), the sample thickness (cm) at wet state and pure water density (g/cm 3 ) respectively.…”

Section: Membrane Porositymentioning

confidence: 99%

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

et al. 2017

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Polymer solutions of polysulfone (PSf) and methylcellulose (MC) in 1-methyl-2-pyrrolidone (NMP) were used to prepare ultrafiltration membranes by the phase inversion technique via immersion precipitation. The effect of MC additive on the structure and performances of the membranes was studied. The obtained membranes were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR-ATR), equilibrium water content (EWC), water contact angle, porosity and ultrafiltration experiments of polyethylene glycol solutions. It was found that all the PSf/MC membranes had higher porosity, more hydrophilic surface and more vertically finger like pores than PSf membrane. With an increase in MC content in the casting solution from 0.5% to 1.5%, the hydraulic permeability increases from 17.17 to 118.46 L.m -2 .h -1 .bar -1 , while the rejection decreases from 91.82% to 64.45% with PEG 35000. DSC scan and FTIR analysis confirmed that methylcellulose was trapped in the membranes matrix.

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Section: Membrane Porositymentioning

confidence: 99%

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

et al. 2017

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“…Chakrabarty et al (2008) also reported that membranes doped with increasing MW PEG (400 to 20000 Da) had a decreased sublayer finger-like structure and increased macrovoids. Ma et al (2011) reported that membranes co-doped with a constant PEG 400 concentration and increasing organically-modified nanoclay resulted in a bottom layer with crescent macrovoids and sponge-like characteristics. However, no control membranes (with only clay or without any additive) were evaluated to compare the effect on macrovoid formation.…”

Section: Porosity Thickness and Morphologymentioning

confidence: 99%

“…Higher polymer concentrations implied in thick superficial layers, like the ones showed in Monticelli and Anadão's experiments. Considering that 18% membranes had shrinkage below 30% and didn't have as many holes as 20%, and also considering other researches use this concentration as reference (MA et al, 2011;YOUNG;CHEN, 1995), 18% polymer was adopted for producing further membranes with clay nanoparticles and PEO.…”

Section: Determination Of Polysulfone Concentrationmentioning

confidence: 99%

“…A research study by Ma et al (2011) presents modified polysulfone membranes with addition of montmorillonite and 400 g/mol polyethylene glycol (PEG) as a pore-forming additive. The difference compared to the other cited studies is the use of Dimethylacetilamide as solvent.…”

Section: Use Of Clay For Membrane Modificationmentioning

confidence: 99%

“…The membrane casting solutions were produced by dissolving PSU (18% w/w) in NMP (82% w/w) with addition of nanoclay (1 to 5% w/w clay/PSU) and/or PEO (1 to 5% w/w PEO/PSU) when applicable. The polymer/solvent ratio was based on studies of Ma et al (2011) andChen et al (2011).…”

Section: Membrane Synthesismentioning

confidence: 99%

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Synthesis and characterization of polysulfone/nanoclay/polyethylene oxide composite ultrafiltration membranes.

Rodrigues¹

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Catalogação-na-publicaçãoRodrigues, Raphael Synthesis and characterization of polysulfone/nanoclay/polyethylene oxide composite ultrafiltration membranes / R. Rodrigues --versão corr. --São Paulo, 2016. 165 p. Palavras-chave: membranas de polisulfona, modificação de estrutura, nano-argila, PEO ABSTRACTMembrane structure modification is a common approach to enhance membrane properties and performance. For example, the addition of dopants to the membrane casting solution has been observed to increase hydrophilicity, alter surface and internal pore structure, increase thermal and mechanical resistance, and impart anti-fouling properties. In this study, it was evaluated how the addition of individual and simultaneous nanoclay and polyethylene oxide (PEO) dopants affected the structure and performance of polysulfone (PSU) ultrafiltration membranes. Membrane performance was evaluated in the cross-flow configuration. The pure water permeability of the neat PSU membrane was 15 L/m².h.bar and at the optimal dosage of the individually doped membranes was 1.5% weight nanoclay to PSU and 5% weight PEO to PSU resulting in permeability of 56 and 237 L/m².h.bar, respectively.Simultaneous doping using the optimal individual weight percentages had a lower effect resulting in a permeability of 192 L/m².h.bar, in contrast the simultaneous addition of 4.5% nanoclay and 5% PEO had a higher effect resulting in a permeability of 319 L/m².h.bar. The control membrane was compared to the referred membranes and with the 4.5% nanoclay membrane (best permeability only when combined with PEO). These membranes were further examined to determine dopant effects on pore microstructure, superficial charge, separation performance, and fouling susceptibility.In general, doping with nanoclay improved membrane thermal/mechanical resistance and permeability with minimal loss in rejection. Doping with PEO resulted in a greater permeability as compared to nanoclay; however, PEO doping decreased rejection, mechanical resistance, and increased irreversible fouling. Thus, both advantageous and disadvantageous effects should be considered when selecting a dopant to optimize membrane performance.

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Molecularly imprinted polymer membrane for the removal of naphthalene from petrochemical wastewater streams

Ghasemi

Nematollahzadeh

2017

Adv Polym Technol

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The aim of this work was the preparation of molecularly imprinted membrane (MiM) using polysulfone (PSf) polymer for targeted removal of polycyclic aromatic hydrocarbons from petrochemical wastewater. Naphthalene was opted as a model pollutant, and the imprinted membrane was fabricated by phase inversion technique.Nonimprinted membrane (NiM) was also prepared in the absence of naphthalene and used as a reference. The polymers (MiM/NiM) were systematically characterized using different characterization techniques. The selectivity property of the membranes was evaluated by their ability in separation of naphthalene through filtration tests. Results showed that in comparison with NiM, the imprinted membrane exhibits higher affinity toward naphthalene molecules. It was found that the selectively of MiM is 2.27-fold more than that of the corresponding NiM. This finding can be encouraging from industrial applications points of view. K E Y W O R D Smembrane, molecularly imprinted polymer, naphthalene, petrochemical wastewater, separation How to cite this article: Ghasemi S, Nematollahzadeh A. Molecularly imprinted polymer membrane for the removal of naphthalene from petrochemical wastewater streams.

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Effect of PEG additive on the morphology and performance of polysulfone ultrafiltration membranes

Cited by 310 publications

References 29 publications

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Synthesis and characterization of polysulfone/nanoclay/polyethylene oxide composite ultrafiltration membranes.

Molecularly imprinted polymer membrane for the removal of naphthalene from petrochemical wastewater streams

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