Showing papers in "Journal of Membrane Science in 2008"

TL;DR: The empirical upper bound relationship for membrane separation of gases initially published in 1991 has been reviewed with the myriad of data now presently available as mentioned in this paper, which indicates a different solubility selectivity relationship for perfluorinated polymers compared to hydrocarbon/aromatic polymers.

TL;DR: In the last 30 years, research efforts by the scientific community intensified significantly, stemming from the pioneering work of Takahashi and co-workers, with the initial development of mixed ionic-electronic conducting (MIEC) oxides.

TL;DR: In this paper, the impacts of organic solvent properties, reaction conditions, and curing conditions on polyamide composite reverse osmosis membrane separation performance, film structure, and interfacial properties are reported.

TL;DR: In this paper, an extensive analysis on direct contact membrane distillation performance was developed to estimate the mass flux and the heat efficiency, considering transport phenomena, membrane structural properties and most sensitive process parameters, with the aim to provide optimization guidelines for materials and methods.

TL;DR: In this paper, the role of various physical and chemical interactions, such as intermolecular adhesion forces, calcium binding, initial permeate flux, and membrane orientation, in organic fouling of forward osmosis membranes was investigated.

TL;DR: In this paper, the main research carried out up to 2007 in hydrophilic pervaporation has been summarized and a summary of the current state of the art can be found.

TL;DR: In this article, the effect of silica nanoparticles in polysulfone (PSf) membranes on gas permeability was investigated and the performance of mixed-matrix membranes (MMMs) for O2/N2 and CO2/CH4 was investigated.

TL;DR: In this paper, the effect of temperature, membrane type, membrane orientation, type and concentration of draw solution was investigated to optimize forward osmosis (FO) membrane performance using deionised water.

TL;DR: In this article, polysulfone (PSf) membranes which had been modified for higher porosity and hydrophilicity through the use of additives such as polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) were used for removal of oil from the oily wastewater.

TL;DR: In this paper, the potential of commercially available anion and cation exchange membranes for application in RED was evaluated and a theoretical membrane model for RED was used to allow fair comparison of the characterization results.

TL;DR: In this paper, the authors demonstrate that support layer hydrophilicity or wetting plays a crucial role in water flux across asymmetric semi-permeable membranes, and the importance of considering membrane support layer chemistry in further development of membranes tailored specifically for osmotically driven membrane processes is discussed.

TL;DR: A detailed study of gas permeation, thermodynamic properties and free volume was performed for a novel polymer of intrinsic microporosity (PIM-1) using both gas chromatographic and barometric methods as discussed by the authors.

TL;DR: In this paper, polyacrylonitrile (PAN) nanofibers were applied to metal adsorption, and the results showed that over 90% of the metals were recovered from the metal-loaded PAN-oxime nanofiber mat after 1.h.

TL;DR: In this article, a simple binary solvent (ethanol/water) was used to obtain a low molecular weight poly(ethylene glycol) PEG membrane with high permeability.

TL;DR: This review shows the important role of membrane science and technology in medical applications but also highlights the importance of collaboration of membrane scientists with others (biologists, bioengineers, medical doctors, etc.) in order to address the complicated challenges in this field.

TL;DR: In this article, polyethylene glycol (PEG) of three different molecular weights were used as the polymeric additives in the casting solution of polysulfone (PSf) by phase inversion method.

TL;DR: In this paper, the influence of fouling on the performance of membrane distillation was investigated during the concentration of wastewater with proteins, bilge water, brines, and the production of demineralized water.

TL;DR: In this paper, two nanofiltration and one low-pressure reverse osmosis membrane have been tested using three produced waters from Colorado, USA, using field emission scanning electron microscopy (FESEM), attenuated total reflection Fourier transform infrared (ATR-FTIR), and X-ray photoelectron spectroscopy (XPS).

TL;DR: In this paper, three sets of polyethersulfone ultrafiltration membranes were modified by TiO 2 nanoparticles and UV irradiation, i.e., TiO2-entrapped membranes, UV-irradiated TiO 1 -deposited membranes and UV-IRradiated 2 -entrapping membranes.

TL;DR: In this article, a submerged membrane bioreactor (MBR) under sub-critical flux operation was systematically characterized, and it was found that the organic foulants coupled with inorganic precipitation enhanced the formation of gel layer and thus caused membrane fouling in the MBR.

TL;DR: In this article, a microporous metal-organic framework with a surface area of 2000 m2/g was combined with Matrimid® polymer to form free standing films, and the permeability properties of the framework were tested for the pure gases H2, N2, O2, CH4, and CO2 and the gas mixtures CO2/CH4, H2/CO2 and CH4/N2.

TL;DR: In this article, barrier membranes were prepared from poly(vinyl alcohol) (PVOH) with different amounts of cellulose nanocrystals (CNXLs) as filler, and heat treatment at 170°C for 45min resulted in membranes with improved water resistance without polymer degradation.

TL;DR: In this paper, the effect of polyvinyl pyrrolidone (PVP) of different molecular weights on the structure and permeation properties of polysulfone (PSf) membranes was investigated.

TL;DR: In this article, a facile method for fabricating a series of PES/Pluronic F127 membranes with controlled flux and excellent antifouling property was developed.

TL;DR: In this article, the authors present a review of the operating principles and fluid dynamics basics of various types of dynamic filtration systems, including cylindrical rotating membranes, disks or blades rotating near a fixed membrane, rotating flat circular membranes, multi-shaft systems with overlapping rotating ceramic membranes and vibrating systems with toroidal membrane oscillations around an axis, or vibrating hollow fibers cartridges.

TL;DR: In this article, the removal of methyl violet 2B, a cationic dye, from water using two kinds of strong-acid cation exchange membranes, ICE 450 supported (with sulfonic acid groups and ion exchange capacity of 9.6-31-μ eq/47mm disc) and P81 (with phosphate groups and ICI capacity of 312-μeq/47 mm disc), was investigated.

TL;DR: In this paper, surface modification of electrospun polyurethane (PU) fibrous membranes, using a process which involved plasma pretreatment, UV-induced graft copolymerization of 4-vinylpyridine (4VP), and quaternization of the grafted pyridine groups with hexylbromide.

TL;DR: In this article, the authors summarize the obtained progress in microwave synthesis of zeolite membranes and discuss the case study of microwave synthesis for LTA type zeolites. But their focus was mainly on LTA-type zeolate membranes.

TL;DR: In this article, the effects of casting mixture composition and nanoparticle incorporation route on the morphological and separation properties of prepared membranes were studied by comparing nanocomposites of different preparations with silver-free controls.

TL;DR: In this article, a supported liquid membrane (SLM) based on a task-specific ionic liquid was proposed to achieve the selective and facilitated CO2 transport through the membrane.