Electrokinetic characterization of poly(vinyl butyral) hollow fiber membranes by streaming potential and electroviscous effect

Qiu, Yunren; Qi, Jianwei

doi:10.1016/j.memsci.2012.09.021

Cited by 10 publications

(6 citation statements)

References 28 publications

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“…Electroviscous effects have also been observed in the flow of electrolytes through fibers [49], ceramic [50], polysulphone [51], and polycarbonate [52] membranes. Experimental results agree with theoretical predictions [31,32,40,41].…”

Section: Electroviscous Effectsmentioning

confidence: 97%

Electroviscous Effects in Stationary Solid Phase Suspensions

Rubio-Hernández

2021

Fluids

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Flowing through porous media is a matter of interest in different research fields such as medicine, engineering and science. The spontaneous appearance of ionic distribution at the solid liquid interface gives place to a reduction in the flow rate, which is generally named electroviscous effect. However, this should be differentiated in two more specific effects, the primary effect due to the distortion of ionic clouds, and the secondary effect due to the overlapping of ionic clouds. Theoretical and experimental works have not always been clearly conducted in order to separate both effects. Instead, they have been globally grouped. The purpose of this review is to revise theoretical and experimental bibliography on the electroviscous effect in stationary solid phase suspensions (porous plugs, membranes, microchannels, capillaries). The main conclusions of this brief revision are: (i) when ionic clouds are relatively small, it is possible to accept that only the primary effect is the cause for the apparent increase of the viscosity of the liquid phase when it is forced to flow relative to the stationary solid phase; (ii) although theory predicts a maximum for the variation of the overall electroviscous effect vs the relative size of the ionic cloud, it has been experimentally observed but not properly reasoned that its existence depends on the salt type; and (iii) it is necessary to justify why, if the fluid is non-Newtonian, electrokinetic parameters dominate the characteristics of the flow due to high pressure gradients, but the rheological parameters are more decisive when the flow is generated by low pressure gradients.

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Section: Electroviscous Effectsmentioning

confidence: 97%

Electroviscous Effects in Stationary Solid Phase Suspensions

Rubio-Hernández

2021

Fluids

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“…Because the outer surface is the dense skin, and the inner surface is porous, and the latter is easily suffered with BSA foulant forthe rough surface can supply moresites to contact with BSA. BSA and PVB membranes are negatively charged [11], the electrostatic repulsion may take effective action on keeping BSA from themembrane surface. In addition, higher pH can suppressor hinder the aggregationof protein molecules due to the repulsion between protein molecules [ 12 ].Similarly, therelative flux (J/J 0 ) for outside-in UF was a little greater than that of inside-out for the same concentration of BSA suspension at the same pH.…”

Section: Cleaning Of the Fouled Membranementioning

confidence: 99%

Effect of Filtration Type on BSA Fouling with PVB Hollow Fiber Membrane

Zhang

Qiu²

2016

Proceedings of the 2015 International Conference on Materials Chemistry and Environmental Protection (Meep-15)

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Hydrophilic poly (vinyl butyral) (PVB) hollow fiber membranes prepared via thermally induced phase separation(TIPS) were used for the filtration of bovine serum albumin (BSA)suspension, and the effect of filtration type on the BSA fouling of the membrane was studied. The results show that compared inside-out filtration with outside-in filtration, therelative fluxof the former is a little smaller than that of the latter for the same concentration of BSA suspension. Therelative flux is the smallest at isoelectric point (IEP), and the greater relative flux is obtainedat higherpH.The SEM results show that the inner surface and the pore channels of the inside-outfiltration membraneare accumulated withBSA particles for 30 min of filtration, while little aggregated BSA particles are shown on the outer surface of the outside-in filtration membrane.

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“…Three pairs of commercial Ag/AgCl electrodes (218 reference electrode, Shanghai Leici, China) were placed on the permeate and retentate sides, which were close to the membrane module. 20 The electrodes were connected to a data acquisition system (USB-FS1208, Measurement ComputingTM, Hungary) that recorded experimental data once every 4 min automatically. The changes in transmembrane pressure (TMP) of the three membrane sections were monitored using pressure sensors (Danfoss, MBS 3000, Denmark) that recorded once automatically every 4 min with a paperless recorder (MIK210B, MEACON, China).…”

Section: Simultaneously Monitoring Local Ux and Zeta Potential Systemsmentioning

confidence: 99%

“…Electrokinetic techniques such as streaming potential measurements have been applied in the characterisation of the surface charge condition of membranes, and the streaming potential can be monitored during ltration. The fundamental relationship between the measured streaming potential and the membrane zeta potential is given by the well-known Helmholtz-Smoluchowski (H-S) equation (( 1)): 20,21…”

Section: The Calculation Of the Zeta Potentialmentioning

confidence: 99%

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Response of zeta potential to different types of local membrane fouling in dead-end membrane filtration with yeast suspension

et al. 2015

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The zeta potential which responded to local membrane fouling forms with yeast suspension was investigated by monitoring both local flux and local zeta potential. Experiments adopting segmentation and in suit monitoring methods during dead-end hollow membrane filtration process were conducted. Comparing the model with experimental data, it could be found that zeta potential reflected the forms of local membrane fouling. The variations in zeta potential during membrane filtration performed differently in pore blocking, cake formation and cake compression processes. When zeta potential decreased rapidly, pore blocking occurred. As zeta potential dropped gradually and linearly, it came to cake filtration. Subsequently, when zeta potential became almost stable, it was experiencing cake compression. Besides, the effect of fiber length on local fouling behavior was also studied. With the increase of fiber length, the time taken by three segments to enter the cake layer compression stage was extended and the difference values of zeta potential in three segments tended to increase.

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Electrokinetic characterization of poly(vinyl butyral) hollow fiber membranes by streaming potential and electroviscous effect

Cited by 10 publications

References 28 publications

Electroviscous Effects in Stationary Solid Phase Suspensions

Electroviscous Effects in Stationary Solid Phase Suspensions

Effect of Filtration Type on BSA Fouling with PVB Hollow Fiber Membrane

Response of zeta potential to different types of local membrane fouling in dead-end membrane filtration with yeast suspension

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