Thinking the future of membranes: Perspectives for advanced and new membrane materials and manufacturing processes

Nunes, Suzana Pereira; Çulfaz-Emecen, P. Zeynep; Ramon, Guy; Visser, Tymen; Koops, G.H.; Jin, Wanqin; Ulbricht, Mathias

doi:10.1016/j.memsci.2019.117761

Cited by 423 publications

(236 citation statements)

References 210 publications

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“…and biodegradable polymers (e.g., poly/lactic acid, cellulose, bacterial cellulose, chitozan, etc.) [ 3 ]. They provide membrane materials for osmotic-based membrane system [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

The Role of Gravity in the Evolution of the Concentration Field in the Electrochemical Membrane Cell

Batko

Ślęzak

Bajdur

2020

Entropy

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The subject of the study was the osmotic volume transport of aqueous CuSO4 and/or ethanol solutions through a selective cellulose acetate membrane (Nephrophan). The effect of concentration of solution components, concentration polarization of solutions and configuration of the membrane system on the value of the volume osmotic flux ( J v i r ) in a single-membrane system in which the polymer membrane located in the horizontal plane was examined. The investigations were carried out under mechanical stirring conditions of the solutions and after it was turned off. Based on the obtained measurement results J v i r , the effects of concentration polarization, convection polarization, asymmetry and amplification of the volume osmotic flux and the thickness of the concentration boundary layers were calculated. Osmotic entropy production was also calculated for solution homogeneity and concentration polarization conditions. Using the thickness of the concentration boundary layers, critical values of the Rayleigh concentration number ( R C r ), i.e., the switch, were estimated between two states: convective (with higher J v i r ) and non-convective (with lower J v i r ). The operation of this switch indicates the regulatory role of earthly gravity in relation to membrane transport.

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“…and biodegradable polymers (e.g., poly/lactic acid, cellulose, bacterial cellulose, chitozan, etc.) [ 3 ]. They provide membrane materials for osmotic-based membrane system [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

The Role of Gravity in the Evolution of the Concentration Field in the Electrochemical Membrane Cell

Batko

Ślęzak

Bajdur

2020

Entropy

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“…A complex combination of molecular templating and supramolecular assembly of discotic components, followed by the template removal by treatment with sodium hydroxide has been recently reported 9 . A breakthrough in applications such as cell fractionation and biomolecules purification would be primarily achieved if better isoporous membranes would be available 10 . Besides the pore size uniformity, an optimum membrane is expected to have a high porosity for high flux, mechanical stability and preferentially flexibility for an easy handling and integration into a device.…”

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confidence: 99%

Nanofabrication of Isoporous Membranes for Cell Fractionation

Sabirova

Pisig

Rayapuram

et al. 2020

Sci Rep

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cell fractionations and other biological separations frequently require several steps. they could be much more effectively done by filtration, if isoporous membranes would be available with high pore density, and sharp pore size distribution in the micro-and nanoscale. We propose a combination of two scalable methods, photolithography and dry reactive ion etching, to fabricate a series of polyester membranes with isopores of size 0.7 to 50 μm and high pore density with a demonstrated total area of 38.5 cm 2 . The membranes have pore sizes in the micro-and submicro-range, and pore density 10-fold higher than track-etched analogues, which are the only commercially available isoporous polymeric films. Permeances of 220,000 L m −2 h −1 bar −1 were measured with pore size 787 nm. The method does not require organic solvents and can be applied to many homopolymeric materials. the pore reduction from 2 to 0.7 μm was obtained by adding a step of chemical vapor deposition. The isoporous system was successfully demonstrated for the organelle fractionation of Arabidopsis homogenates and could be potentially extended to other biological fractionations.Different biomedical and diagnostic technologies, such as cancer cell separation, biosensing, controlled drug delivery, microfluidic devices for organ-in-a-chip, as well as investigations in plant and bioscience relay on effective separation processes. The main hurdle for an effective separation by filtration is the limited availability of highly uniform pores in the size of tens to a few micrometers, a range relevant for these applications. The majority of commercial membranes, prepared in large-scale by a classical solution casting and non-solvent induced phase separation (NIPS), have a broad pore size distribution, limiting their application when strict selectivity is essential. There is only one kind of commercial polymeric isoporous membranes in the market: the track-etched membranes (e. g. Nuclepore, Cyclopore), prepared by the bombardment of fission fragments in a nuclear reactor or ion beams in high energy accelerators, mostly available with pores of a few micrometers or down tenths of micrometer 1,2 . The track-etched membranes are usually made of polycarbonate (PC) or poly(ethylene terephthalate) (PET). Their pore density is low, they are normally commercialized in small discs, the isoporosity is not always perfect due to the possible overlap of tracks during the bombardment preparation step 3 . Beside track-etching, among the most interesting research approaches to develop isoporous membranes in the last decade is the self-assembly and non-solvent induced phase separation (SNIPS) of block copolymers, also a relevant topic in our group 4 . Most membranes under this category have pores in the range of 20-60 nm, with some reports down to a few nanometers. While the SNIPS process can be done in large membrane machines, the obtained morphology is highly dependent on the composition of the block copolymer, the solvent and conditions used for the casting process. The materi...

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“…Input on the requirements of industries would allow novel membrane materials and membrane processes to be designed for specific demands. 29…”

Section: The Gap Between Academic and Industrial Significancementioning

confidence: 99%

Reporting the unreported: the reliability and comparability of the literature on organic solvent nanofiltration

2020

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Thinking the future of membranes: Perspectives for advanced and new membrane materials and manufacturing processes

Cited by 423 publications

References 210 publications

The Role of Gravity in the Evolution of the Concentration Field in the Electrochemical Membrane Cell

The Role of Gravity in the Evolution of the Concentration Field in the Electrochemical Membrane Cell

Nanofabrication of Isoporous Membranes for Cell Fractionation

Reporting the unreported: the reliability and comparability of the literature on organic solvent nanofiltration

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