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Showing 1 to 14 of 14 for “"Membrane selectivity"”.
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Development of Thin-Film Composite Membranes Incorporated With Graphene Oxide and Derivatives for Forward Osmosis Processes
… performance of the thin-film composite (TFC) membranes. Nonetheless, very few studies provided an in-depth explanation of the possible interaction between GO and polymer matrix that alter the membrane properties and performance. Thus, the overall aim of this study was to develop …
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Control of size and charge selectivity in amphiphilic graft copolymer nanofiltration membranes
The throughput and efficiency of membrane separations make polymer filtration membranes an important resource for the pharmaceutical, food and wastewater treatment industries. Nanofiltration (NF) membranes fill an important niche between nonporous reverse osmosis membranes, which have comprehensive …
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Study of vapor/gas permeation using thin immobilized liquid membrane
To improve liquid membrane selectivity and stability for removal of vapor and gases from a gas stream, a thin immobilized liquid membrane (ILM) has been studied. Low vapor pressure liquid solvent/solutions were immobilized in part of the micropores of a hydrophilic, hydrophobic or ceramic hollow …
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Effects of Magnetically Induced Micro-mixing on Nanofiltration Performance
<p>Nanofiltration (NF) is a relatively new membrane separation process mainly used for removing low molecular weight species from aqueous and non-aqueous solutions. NF membranes suffer from concentration polarization leading to membrane fouling thus compromised membrane performance. Magnetically …
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Characterisation of feed and membrane properties for industrial ultrafiltration management
… industrial management of ultrafiltration (UF) membranes requires an assessment of the impact of feed and membrane characteristics on fouling behaviour in complex feed scenarios. However, this assessment is limited by current understanding of (a) the utility of common foulant characterisation …
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Studio Sperimentale e Modellazione della Separazione di Proteine con Membrane di Affinità
… capacity on flow rate. In this work, affinity membranes with improved capacity have been considered as an alternative technology for the capturing step in antibody manufacturing. Several affinity membranes have been prepared starting from various membrane supports. Different affinity ligands …
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Application Of Composite Polymeric Membranes For Efficient Regeneration Of Physical Solvents
… is to evaluate the use of composite polymeric membranes for the recovery of CO2 from CO2-rich solvent streams. To achieve this purpose, an experimental bench-scale setup was built to investigate and quantify CO2 removal capacity from the rich solvent across different types of membranes. </p> …
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Macroscopic graphene membranes with tunable nanopores for highly selective mass separation
Membrane-based filtration enables energy-efficient separations of solutes, solvents, or gases, benefiting a wide range of applications including water desalination, nanofiltration, hemodialysis, solvent-based separation, or natural gas purification. Semipermeable polymeric desalination membranes …
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Transport and Structure in Fuel Cell Proton Exchange Membranes
… poly(perfluorosulfonic acid) copolymer membrane for fuel cells, Nafion, were compared. Species transport (protons, methanol, water) in hydrated membranes was found to correspond with the water-self diffusion coefficient as measured by pulsed field gradient nuclear magnetic resonance (PFG …
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Separation of various organic-organic and aqueous-organic solutions via pervaporation
… polymers are able to withstand them. An ideal membrane would be polymeric having a high thermal, chemical and mechanical stability. Such a membrane is made of a copolymer of polydimethyldioxole and tetrafluoroethylene known as PDD-TFE of the CMS-3 variety with a very high free volume. This …
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Engineering nanostructured selective layers for reverse osmosis membranes
… via pressurized flow past a salt-selective membrane, is an energy-efficient method to generate freshwater from oceanic, brackish, and waste water sources. However, there are a number of challenges to scaling up RO processes to large scale production, including the need to improve membrane …
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Gas diffusion transport characteristics and mathematical description of membrane systems with application for biogas upgrading.
… for use as a renewable energy source using membrane technology. The study began with observing the behaviour of biogas components as they travel selectively through the membrane support. This was done by conducting gas permeation tests to experimentally show how methane and carbon dioxide …
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The Use of Solubility Parameters to Select Membrane Materials for Pervaporation of Organic Mixtures
… was investigated for screening potential membrane materials for the pervaporation of a model solution containing linalool and linalyl acetate (major components of lavender essential oil), in ethanol. Published HSP values were collated for various polymers, and statistically analysed to …
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Dynamical models, chemo-mechanical coupling and numerical recipes for some soft biological systems
… at the cellular level, the case of plasma membranes has been analyzed to study the crosstalk between chemical events and the morphological and mechanical adaptation of the bilayer, which directly influence membrane selectivity and cell-ECM communication. In fact, the plasma membrane appears …