Mass transfer in corrugated-plate membrane modules. II. Ultrafiltration experiments

Waal, M.J. van der; Stevanović, Slavica; Rácz, I.G.

doi:10.1016/0376-7388(89)89009-x

Cited by 27 publications

(9 citation statements)

References 3 publications

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“…In addition to improved material selection [1,2] or preparation condition approaches [3,4], increasing the active area of a membrane through the use of patterned membranes offers another more generic approach [5]. The first study on patterned membranes used a corrugated polyvinyl chloride (PVC) plate with 1.5 mm deep half-cylinder patterns spaced 0-80 mm apart to shape cellulose acetate (CA) and polysulfone (PSf) membranes [6,7]. The main methods that have been developed since this first study are illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

Preparation of patterned flat-sheet membranes using a modified phase inversion process and advanced casting knife construction techniques

Marbelia

Ilyas

Dierick

et al. 2020

Journal of Membrane Science

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High fluxes and low fouling are practically highly desired in all membrane processes. One generic way to realize this is by introducing surface patterns on the membrane to increase the active area and the surface roughness. A new method to prepare flat-sheet patterned membranes using a patterned knife combined with a modified phase inversion process is now presented. After casting the polymer solution, the patterned knife shapes the top surface into the desired pattern. Non-solvent is sprayed immediately after the passage of the knife to rapidly solidify the polymer and preserve the pattern. To construct the patterned knife, different materials and techniques were evaluated: (1) an aluminium knife shaped by electrical discharge micromachining, (2) a gypsum knife shaped by powder-based 3D-printing, and (3) an acrylate resin, shaped by photopolymerization 3D-printing (stereo-lithography). As such, replacing the conventional nonsolvent contact in the phase inversion via immersion by spraying already increased membrane permeance, but a significant further increase of permeance resulted from the increased surface area realized through the patterning. A minimum viscosity of the casting solution of around 7.5-10 Pa.s was required to realize well-pronounced patterns on the membrane, as screened for polyacrylonitrile and cellulose acetate, both dissolved in dimethyl sulfoxide and using water as non-solvent.

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Section: Introductionmentioning

confidence: 99%

Preparation of patterned flat-sheet membranes using a modified phase inversion process and advanced casting knife construction techniques

Marbelia

Ilyas

Dierick

et al. 2020

Journal of Membrane Science

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“…[4,35] In addition to surface chemistry, surface topography or roughness is a key factor that affects membrane-feed interactions, [7][8][9] and thus represents a potentially pivotal aspect of fouling mitigation. For example, macroscopic corrugations (~ mm scale) were introduced as "turbulence promoters" [36][37][38][39] to speed up the mass transfer of particles/solute away from the membrane surface, which in turn reduces membrane fouling. [40] However, macroscopic corrugations cannot be easily integrated into commercial membranes given their large A c c e p t e d M a n u s c r i p t 3 dimensions.…”

Section: Introductionmentioning

confidence: 99%

Surface patterning of polymeric membranes and its effect on antifouling characteristics

Ding

Maruf

Aghajani

et al. 2016

Separation Science and Technology

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Surface roughness of membranes is often perceived by many as a factor that promotes fouling during filtration, and thus is undesirable. Almost all liquid-based separation membranes display flat surfaces with intrinsic surface roughness that is associated with the membrane manufacturing process. Recently, polymer ultrafiltration (UF) and thin film composite (TFC) membranes containing regular, periodic surface patterns were fabricated using cost-effective lithographic methods. Here, we review the work to-date on the fabrication and characterization of these patterned membranes with a focus on processing-structure-performance relationships.In addition, the antifouling performance of these membranes against model foulants including colloidal suspensions and protein solutions are also highlighted.

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“…Parmi les procedes mis au point, on peut citer : les promoteurs de turbulence : des grilles de metal deploy6 sont placees parallelement b la membrane de facon b diriger le fluide vers celle-ci et crCer ainsi un phenomene d'instabilit6 b sa surface permettant de diminuer la resistance au transfert principalement localiske dans la couche limite laminaire au contact de la membrane (Poyen et al ., 1984 ;Sebbane et al, 1991). Ces promoteurs de turbulence existent Cgalement sous la forme de cannelures ou d'inserts places directement sur la surface de la membrane ou dans le canal d'ecoulement (Van der Waal et al ., 1989). La modification de la surface interieure d'une membrane tubulaire par une empreinte en relief de forme helico7dale permet d'obtenir des flux de permeation quatre fois plus eleves qu'avec une membrane tubulaire classique (Cot, 1998), les systemes membranaires dynamiques (Pall Ultrafine Croup, 1996) : la vibration de la membrane diminue I'accumulation d'un dCpBt B sa surface en induisant des contraintes de cisaillement Cl evbes sur la surface filtrante, independamment du debit de recirculation et des conditions de pression, les flux pulsCs : la formation de la couche de polarisation a la surface de la membrane est alors limitie par la presence de debits d'amplitude et de frequence variables imposes b I'entree d'une membrane tubulaire (Blanpain et al, 1991), 'Auteur auquel la conespondance doit Ctre adressie.…”

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Comparaison de deux types d'écoulements (tangentiel plan et tourbillonnaire) dans des modules d'ultrafiltration. Influence de la contrainte pariétale

et al. 2000

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This work consists of evaluating the performances of a new membrance separation process: an annular, swirling, decaying flow induced by a tangential inlet. For this purpose, we have compared the permeation flux obtained in swlrling flow with that of a crossflow. We ultrafiltered a model suspension of bentonite in order to compare the performances of the two modul es for different operating conditions. Parameters such as flow rate, Reynol ds number and wall velocity gradient were studied, and this last one appears to be a significant hydrodynamic parameter to compare the configurations. Indeed, this ccount the flow field nature and, more precisely, the shear stress at the membrane surface. improvement of the permeation flux induced by the swirling, decaying flow in comparison with that observed in cross-flow can reach more than 30% under specific conditions. The study of the energy consumption of these two cells allows us to confirm the interest of the swirling, decaying flow in order to design new types of membrane separation modules.Mots c l b : ultrafiltration, hcoulement tourbillonnaire, koulement tangentiel plan, gradient p e vitesse, bentonite, consommation energhtiqu 248

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Mass transfer in corrugated-plate membrane modules. II. Ultrafiltration experiments

Cited by 27 publications

References 3 publications

Preparation of patterned flat-sheet membranes using a modified phase inversion process and advanced casting knife construction techniques

Preparation of patterned flat-sheet membranes using a modified phase inversion process and advanced casting knife construction techniques

Surface patterning of polymeric membranes and its effect on antifouling characteristics

Comparaison de deux types d'écoulements (tangentiel plan et tourbillonnaire) dans des modules d'ultrafiltration. Influence de la contrainte pariétale

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