Influence of processing conditions on the properties of ultrafiltration membranes

Mosqueda-Jimenez, Daniella B.; Narbaitz, Roberto; Matsuura, Takeshi; Chowdhury, Geeta; Pleizier, G.; Santerre, J. Paul

doi:10.1016/j.memsci.2003.11.026

Cited by 156 publications

(81 citation statements)

References 26 publications

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“…Therefore, the average pore size can be predicted by the r calculated from the MWCO of the membrane that was determined from the StokesEinstein radius of the solute which gives 90 % separation applying this equation. This relationship was extensively used by other researchers [36,42].…”

Section: Filtration Experimentsmentioning

confidence: 99%

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

García-Ivars

Iborra–Clar

Alcaina–Miranda

et al. 2015

Journal of Membrane Science

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ElsevierGarcía Ivars, J.; Iborra Clar, MI.; Alcaina Miranda, MI.; Van Der Bruggen, B. (2015). Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes. ABSTRACTInorganic nanoparticles have been applied as additive in membrane synthesis for improving different properties from the base polymer such as hydrophilicity, fouling resistance or permselectivity. To investigate the changes caused by the presence of the inorganic nanoparticles in the formation of the membrane structure, two different metallic compounds with opposite hydrophilicity were used as additives: hydrophilic zinc oxide (ZnO) and hydrophobic tungsten disulphide (WS 2 ). For this purpose, the effect of these metal nanoparticles at ultra-low concentrations (0.05 and 0.25 wt% metal nanoparticles/polymer ratio) in the preparation of flat-sheet membranes based on polyethersulphone (PES) by immersion-precipitation method was investigated. Nmethyl-2-pyrrolidone (NMP) was used as solvent. The influence of both metal nanoparticles on the characteristics and permselective properties of PES membranes was studied with microscopic observations, contact angle measurements, and filtration experiments. Although the incorporation of metal nanoparticles could turn the system into thermodynamically unstable, the demixing process during formation of membranes was slightly delayed, suppressing the macrovoid formation (remarkably using WS 2 ).Regardless the nature of the metal nanoparticles, results showed an overall improvement in membrane hydrophilicity and permselectivity by adding metal nanoparticles compared to the control PES membrane, demonstrating that the behaviour of both metal nanoparticles at ultra-low concentrations was very similar.

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Section: Filtration Experimentsmentioning

confidence: 99%

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

García-Ivars

Iborra–Clar

Alcaina–Miranda

et al. 2015

Journal of Membrane Science

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“…This results in a lower water flux and serious membrane fouling. Hence, polysulfone membranes without modification seem less suitable for application in industry 14,15 . In order to improve membrane permeability and anti-fouling behavior, several studies have been devoted to this subject.…”

Section: Introductionmentioning

confidence: 99%

“…In order to improve membrane permeability and anti-fouling behavior, several studies have been devoted to this subject. Among these approaches, polymeric additives 15,16 are considered as an effective and convenient method because of their excellent performance and facility to handle. Polyvinylpyrrolidone [17][18][19] , poly (ethylene glycol) [20][21][22] and the polyaniline (emeraldine base) 14 were used as additives in the preparation of polysulfone membranes to promote their performances.…”

Section: Introductionmentioning

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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“…Coagulation/flocculation in itself is a renowned way to harvest microalgae [23]. At the same time, dosing a coagulant/flocculant is also often applied to improve membrane filterability in non-microalgae applications [19,20,24]. For improving feed filterability by addition of a small amount of coagulant, the dosing concentration should be sufficiently high, which can be costly; while for the standalone coagulation/flocculation, the dosing concentration is generally lower.…”

Section: Introductionmentioning

confidence: 99%

Decreasing membrane fouling during Chlorella vulgaris broth filtration via membrane development and coagulant assisted filtration

et al. 2015

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Influence of processing conditions on the properties of ultrafiltration membranes

Cited by 156 publications

References 26 publications

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

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

Decreasing membrane fouling during Chlorella vulgaris broth filtration via membrane development and coagulant assisted filtration

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