Performance of ultrafiltration membranes in ethanol–water solutions: effect of membrane conditioning

Shukla, Rishi; Cheryan, Munir

doi:10.1016/s0376-7388(01)00638-x

Cited by 92 publications

(52 citation statements)

References 19 publications

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“…In all cases, except for the Nadir membranes (N30F and NF-PES-010) with n-hexane, the degree of swelling is higher in water than in the organic solvents. This phenomenon was also reported by Oikawa et al (1991) for reverse osmosis membranes and by Shukla and Cheryan (2002) for ultraÿltration membranes. Swelling for ethanol is also more important than for the other organic solvents.…”

Section: Swelling and Rejectionsupporting

confidence: 79%

Characterisation of the solvent stability of polymeric nanofiltration membranes by measurement of contact angles and swelling

Geens

Bruggen

Vandecasteele

2004

Chemical Engineering Science

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Section: Swelling and Rejectionsupporting

confidence: 79%

Characterisation of the solvent stability of polymeric nanofiltration membranes by measurement of contact angles and swelling

Geens

Bruggen

Vandecasteele

2004

Chemical Engineering Science

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“…Whu et al [8] studied performance of nanofiltration membrane with methanol and reported that membranes initially exhibit considerable time dependence for change in flux and rejection while becoming time invariant later on. Recently, Shukla and Cheryan [9] reported studies on UF of organic solvents. They reported a significant effect of membrane conditioning on performance of UF membrane in ethanol-water solution and subsequently suggested a conditioning scheme.…”

Section: Introductionmentioning

confidence: 99%

Effects of ethanol concentration on flux and gel formation in dead end ultrafiltration of PEG and dextran*1

ZAIDI

2004

Journal of Membrane Science

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The phenomenon of concentration polarization and gel formation plays an important role in ultrafiltration of macromolecules from water. However, there is lack of studies on similar phenomena for macromolecule ultrafiltration from blends of aqueous and non-aqueous solvents. This paper reports the effect of ethanol concentration on flux in ultrafiltration of polyethylene glycol and dextran with a solvent resistant polymeric membrane. Transient filtration data, collected after steady state, was utilized to determine actual filtration resistance and contribution of polarization using the osmotic pressure model. It was observed that both steady state flux and gel formation were significantly influenced in the ultrafiltration of both PEG and dextran from blended solvents. It was also observed that the onset of gel formation for PEG and concentration polarization for dextran in blended solvents occurred at significantly higher bulk solute concentrations than in water alone.

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“…Many researchers have investigated the effect of solvent on the flux of asymmetric or composite membranes [25,26]. Furthermore, as the PEI content came to 15 wt-%, pure water flux changed remarkably with the increase in PEG additive.…”

Section: Influence Of Peg Concentration On Pure Water Fluxmentioning

confidence: 99%

Effect of PEG additives on properties and morphologies of polyetherimide membranes prepared by phase inversion

Chen

Zhan

et al. 2010

Front. Chem. Eng. China

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This study investigated the effect of poly (ethylene glycol) (PEG) additive as a pore-former on the structure formation of membranes and their permeation properties connected with the changes in thermodynamic and kinetic properties in the phase inversion process. The membranes were prepared by using polyetherimide/Nmethyl-2-pyrrolidone/PEG (PEI/NMP/PEG) casting solution and water coagulant. The resulting membranes, prepared by changing the ratio of PEG to PEI, were characterized by scanning electron microscope (SEM) observations, measurements of water flux and γ-globin rejection. The thermodynamic and kinetic properties of the membrane-forming system were studied through viscosity. The pore radius distribution curves were especially obtained by differential scanning calorimetry (DSC). Furthermore, the membranes were characterized for pure water flux and rejection of solute and by SEM observation. The filtration results agreed well with the SEM observations. As expected, PEG with a fixed molecular weight (PEG 600) acted as a pore forming agent, and membrane porosity increased as the PEG content of the casting solution increased.

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Performance of ultrafiltration membranes in ethanol–water solutions: effect of membrane conditioning

Cited by 92 publications

References 19 publications

Characterisation of the solvent stability of polymeric nanofiltration membranes by measurement of contact angles and swelling

Characterisation of the solvent stability of polymeric nanofiltration membranes by measurement of contact angles and swelling

Effects of ethanol concentration on flux and gel formation in dead end ultrafiltration of PEG and dextran*1

Effect of PEG additives on properties and morphologies of polyetherimide membranes prepared by phase inversion

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