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You searched for: Journal Journal of membrane science Remove constraint Journal: Journal of membrane science Publication Year 2013 Remove constraint Publication Year: 2013 Source 2013 v.443 Remove constraint Source: 2013 v.443
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1. A CO₂-tolerance oxygen permeable 60Ce₀.₉Gd₀.₁O₂₋δ–40Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ dual phase membrane

Author:
Xue, Jian; Liao, Qing; Wei, Yanying; Li, Zhong; Wang, Haihui
Source:
Journal of membrane science 2013 v.443 pp. 124-130
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; oxygen
Abstract:
... A CO₂-tolerant dual phase membrane with composition of 60wt% Ce₀.₉Gd₀.₁O₂₋δ–40wt% Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ (60CGO–40BSCF) was successfully developed. The 60CGO–40BSCF dual phase membrane showed good reversibility of the oxygen permeation fluxes and good stability in CO₂ atmosphere. A stable oxygen permeation flux of 0.67mL/mincm² was obtained with pure CO₂ as the sweep gas during a 250h oxygen per ...
DOI:
10.1016/j.memsci.2013.04.067

2. Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ (BSCF) feedstock development and optimization for thermoplastic forming of thin planar and tubular oxygen separation membranes

Author:
Salehi, Mehdi; Pfaff, Ewald M.; Junior, Roberto Morkis; Bergmann, Carlos P.; Diethelm, Stefan; Neururer, Christoph; Graule, Thomas; Grobéty, Bernard; Jörg Clemens, Frank
Source:
Journal of membrane science 2013 v.443 pp. 237-245
ISSN:
0376-7388
Subject:
activation energy; artificial membranes; deformation; extrusion; feedstocks; mixing; models; oxygen; paraffin wax; polystyrenes; rheological properties; rheometers; stearic acid; thermoplastics; torque
Abstract:
... This paper presents the processing steps for producing thin planar and tubular oxygen separation membranes by thermoplastic forming of Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ (BSCF) with polystyrene (PS) and stearic acid (SA) as binder. The influence of powder content on the shape stability of thin membranes (tubular and planar structures) during the thermoplastic processing route was investigated. The effect of ...
DOI:
10.1016/j.memsci.2013.04.051

3. Comparison of flux behavior and synthetic organic compound removal by forward osmosis and reverse osmosis membranes

Author:
Heo, Jiyong; Boateng, Linkel K.; Flora, Joseph R.V.; Lee, Heebum; Her, Namguk; Park, Yong-Gyun; Yoon, Yeomin
Source:
Journal of membrane science 2013 v.443 pp. 69-82
ISSN:
0376-7388
Subject:
adsorption; artificial membranes; atrazine; cellulose; hydrophilicity; hydrophobicity; molecular dynamics; molecular models; molecular weight; reverse osmosis; salts; sulfamethoxazole
Abstract:
... Bench-scale forward osmosis (FO) and reverse osmosis (RO) experiments with both FO and RO membranes were used to investigate the systematic and mechanistic comparison of flux and removal behaviors of the relative hydrophilicities of several synthetic organic compounds (SOCs). The cellulose triacetate-based FO membrane exhibited relatively lower selectivity ratios based on the solution-diffusion mo ...
DOI:
10.1016/j.memsci.2013.04.063

4. Coupled concentration-dependent diffusivities of ethanol/water mixtures through a polymeric membrane: Effect on pervaporative flux and diffusivity profiles

Author:
Yang, Tzu-Huai; Lue, Shingjiang Jessie
Source:
Journal of membrane science 2013 v.443 pp. 1-9
ISSN:
0376-7388
Subject:
artificial membranes; diffusivity; equations; ethanol; models; solvents; sorption
Abstract:
... The partial pervaporative (PV) fluxes of ethanol/water mixtures in polydimethylsiloxane (PDMS) were predicted using Fick's first law and modified Maxwell–Stefan equation. The sorption levels were predicted using UNIQUAV-HB and the experimental solvent diffusion coefficients of the mixtures were expressed in terms of their sorption concentrations according to Long's model. Both permeant diffusion c ...
DOI:
10.1016/j.memsci.2013.05.002

5. Detection of reverse osmosis membrane fouling with silica, bovine serum albumin and their mixture using in-situ electrical impedance spectroscopy

Author:
Sim, L.N.; Wang, Z.J.; Gu, J.; Coster, H.G.L.; Fane, A.G.
Source:
Journal of membrane science 2013 v.443 pp. 45-53
ISSN:
0376-7388
Subject:
artificial membranes; silica; reverse osmosis; monitoring; industry; dielectric spectroscopy; electrodes; filtration; bovine serum albumin; fouling
Abstract:
... Monitoring the ‘state of the process’ is particularly useful in fouling control in the reverse osmosis (RO) industry. In this paper, a novel non-invasive method to monitor the fouling process of single and binary foulants on the RO membrane has been studied; that of electrical impedance spectroscopy (EIS). A typical RO crossflow cell was equipped with electrodes to allow in-situ EIS measurement of ...
DOI:
10.1016/j.memsci.2013.04.047

6. Development of phosphonium-based bicarbonate anion exchange polymer membranes

Author:
Ye, Yuesheng; Stokes, Kristoffer K.; Beyer, Frederick L.; Elabd, Yossef A.
Source:
Journal of membrane science 2013 v.443 pp. 93-99
ISSN:
0376-7388
Subject:
anion exchange; artificial membranes; bicarbonates; chemical degradation; chlorides; composite polymers
Abstract:
... We report the preparation and characterization of phosphonium-based bicarbonate anion exchange random copolymers, poly(styrene-random-trimethylvinylbenzyl phosphonium bicarbonate) (poly(S-r-TMVBP-HCO₃)). Compared to the chloride anion (Cl⁻) exchange membranes, these HCO₃ ⁻ exchange membranes exhibit similar hydration levels and only slightly lower ionic conductivities at similar ionic compositions ...
DOI:
10.1016/j.memsci.2013.04.053

7. Effect of the acetate group content on gas permeation through membranes based on poly(ethylene-co-vinyl acetate) and its blends

Author:
Wolinska-Grabczyk, Aleksandra; Kubica, Piotr; Jankowski, Andrzej
Source:
Journal of membrane science 2013 v.443 pp. 227-236
ISSN:
0376-7388
Subject:
acetates; artificial membranes; carbon dioxide; composite polymers; crystal structure; gases; permeability
Abstract:
... The transport of gases through poly(ethylene-co-vinyl acetate) (EVA) of vinyl acetate (VAc) content ranging from 25 to 70wt%, and through the respective EVA blends was studied. The both types of materials exhibited the same order of decreasing permeability CO₂>He>O₂>N₂. However, the membranes prepared from EVA copolymers were found to be more permeable than those obtained from the blends, showing ...
DOI:
10.1016/j.memsci.2013.04.057

8. Effect of the equilibria of multivalent metal sulfates on the transport through cation-exchange membranes at different current regimes

Author:
Martí-Calatayud, M.C.; García-Gabaldón, M.; Pérez-Herranz, V.
Source:
Journal of membrane science 2013 v.443 pp. 181-192
ISSN:
0376-7388
Subject:
artificial membranes; sulfates; iron; cations; cation exchange; salt concentration; mass transfer; chromium
Abstract:
... The transport of trivalent metals (Cr(III) and Fe(III)) through cation-exchange membranes is studied and compared with the transport of mono- and divalent ions by means of chronopotentiometry and current–voltage characteristics. The species present in solutions of sulfate salts of multivalent metals give rise to different transport properties depending on the applied current. The detection of vari ...
DOI:
10.1016/j.memsci.2013.04.058

9. Evaluation of scaling potential in a pilot-scale NF–SWRO integrated seawater desalination system

Author:
Song, Yuefei; Gao, Xueli; Gao, Congjie
Source:
Journal of membrane science 2013 v.443 pp. 201-209
ISSN:
0376-7388
Subject:
artificial membranes; calcium carbonate; calcium sulfate; desalination; ions; nanofiltration; reverse osmosis; seawater
Abstract:
... Pilot-scale experiments were carried out on a nanofiltration (NF)–seawater reverse osmosis (SWRO) integrated membrane system (IMS) to evaluate scaling potential on NF and SWRO membrane surface using a kind of loosen NF membrane and costal seawater. The effect of NF permeate recovery (RNF) increasing on the occurrence of scaling in the NF and SWRO module was investigated in term of concentration po ...
DOI:
10.1016/j.memsci.2013.04.048

10. Fabrication of novel polyetherimide-fluorinated silica organic–inorganic composite hollow fiber membranes intended for membrane contactor application

Author:
Zhang, Yuan; Wang, Rong
Source:
Journal of membrane science 2013 v.443 pp. 170-180
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; absorbents; absorption; aqueous solutions; artificial membranes; carbon dioxide; chemical reactions; contact angle; energy; hydrophobicity; mechanical properties; scanning electron microscopy; silica; surface roughness; ultrasonic treatment
Abstract:
... Hydrophobic surface can be produced by either lowering the surface free energy or enhancing the surface roughness or a combination of both. This study explored a novel method to form a highly hydrophobic organic–inorganic composite hollow fiber membrane by incorporating the fluorinated silica (fSiO₂) inorganic layer on the polyetherimide (PEI) organic substrate. The formation of the composite memb ...
DOI:
10.1016/j.memsci.2013.04.062

11. Fouling in pleated microfiltration cartridges caused by Pseudomonas putida

Author:
Rosas, Irene; Collado, Sergio; Fernández, Irene; Gutierrez-Lavin, Antonio; Diaz, Mario
Source:
Journal of membrane science 2013 v.443 pp. 107-114
ISSN:
0376-7388
Subject:
Pseudomonas putida; air; artificial membranes; biodegradation; biomass; cleaning; fouling; microfiltration; models; permeability; porosity; salicylic acid
Abstract:
... Characteristics and mechanisms of the fouling of microfiltration pleated cartridges (10-inch, PES, pore size of 0.2µm) in biotechnical applications were analyzed, in order to obtain information about strategies that allow increasing their lifespan. Specifically, fouling experiments were carried out using the biodegradation of salicylic acid by means of Pseudomona putida as model of cellular media. ...
DOI:
10.1016/j.memsci.2013.04.071

12. High performance PIM-1/Matrimid hollow fiber membranes for CO₂/CH₄, O₂/N₂ and CO₂/N₂ separation

Author:
Yong, Wai Fen; Li, Fu Yun; Xiao, You Chang; Chung, Tai Shung; Tong, Yen Wah
Source:
Journal of membrane science 2013 v.443 pp. 156-169
ISSN:
0376-7388
Subject:
air; annealing; artificial membranes; carbon dioxide; coatings; natural gas; oxygen; rubber; scanning electron microscopy; silicon; silicone; spectroscopy; spinning
Abstract:
... Polymers of intrinsic microporosity (PIM-1) have received worldwide attention but most PIM-1 researches have been conducted on dense flat membranes. For the first time, we have fabricated PIM-1/Matrimid membranes in a useful form of hollow fibers with synergistic separation performance. The newly developed hollow fibers comprising 5–15wt% of highly permeable PIM-1 not only possess much higher gas- ...
DOI:
10.1016/j.memsci.2013.04.037

13. Layered zirconium phosphate sulfophenylphosphonates reinforced sulfonated poly (fluorenyl ether ketone) hybrid membranes with high proton conductivity and low vanadium ion permeability

Author:
Pan, Jingjing; Wang, Shuanjin; Xiao, Min; Hickner, Michael; Meng, Yuezhong
Source:
Journal of membrane science 2013 v.443 pp. 19-27
ISSN:
0376-7388
Subject:
artificial membranes; microstructure; zirconium; X-ray diffraction; ions; hydrophilicity; energy-dispersive X-ray analysis; scanning electron microscopy; phosphates; hydrophobicity; sulfonic acids; vanadium; batteries; permeability
Abstract:
... Sulfonated poly(fluorenyl ether ketone) (SPFEK) membranes were modified with layered proton conductors zirconium phosphate sulfophenylenphosphonates (ZrPSPP) to improve the proton conductivity and mitigate vanadium ions crossover. The effects of ZrPSPP filler loading on the microstructure and chemical–physical property of SPFEK/ZrPSPP composite membranes as well as the vanadium redox flow battery ...
DOI:
10.1016/j.memsci.2013.04.068

14. Membranes from rigid block hexafluoro copolyaramides: Effect of block lengths on gas permeation and ideal separation factors

Author:
Loría-Bastarrachea, Maria I.; Aguilar-Vega, Manuel
Source:
Journal of membrane science 2013 v.443 pp. 36-44
ISSN:
0376-7388
Subject:
artificial membranes; composite polymers; diffusivity; permeability; temperature; thermal properties
Abstract:
... Dense membranes were prepared from three different rigid block copolyaramides, one block bearing two bulky hexafluoro (–CF₃) groups and a lateral tert-butyl group (–C–(CH₃)₃), and the second block without the lateral tert-butyl group. The effect of block length, at constant comonomer concentration, on thermal properties as well as gas permeability coefficients and separation factors is analyzed. T ...
DOI:
10.1016/j.memsci.2013.04.042

15. Morphology and free volume of nanocomposite Teflon AF 2400 films and their relationship to transport behavior

Author:
Zhang, Hong; Wang, Sijia; Weber, Stephen G.
Source:
Journal of membrane science 2013 v.443 pp. 115-123
ISSN:
0376-7388
Subject:
artificial membranes; gases; nanocomposites; nanospheres; permeability; polytetrafluoroethylene; silica; solutes
Abstract:
... Free volume is a key property regulating penetrant (gas phase) or solute (solution phase) permeability in polymeric membranes. Thus, we investigated the origins of free volume in two types of Teflon AF 2400 nanocomposites. In nanocomposites from glassy Teflon AF and fluorophilic, solid silica nanospheres, the soft matrix shows exceptionally high apparent fractional free volume (aFFVP)—reaching ove ...
DOI:
10.1016/j.memsci.2013.04.064

16. Nanocomposite poly(arylene ether sulfone) reverse osmosis membrane containing functional zeolite nanoparticles for seawater desalination

Author:
Kim, Sang Gon; Hyeon, Dong Hun; Chun, Jeong Hwan; Chun, Byung-Hee; Kim, Sung Hyun
Source:
Journal of membrane science 2013 v.443 pp. 10-18
ISSN:
0376-7388
Subject:
Pongidae; artificial membranes; chlorination; chlorine; composite polymers; crosslinking; desalination; nanocomposites; nanoparticles; permeability; polyamides; reverse osmosis; seawater; zeolites
Abstract:
... In this study, composite reverse osmosis (RO) membranes made from sulfonated poly(arylene ether sulfone) containing amino groups (aPES) and aminated template free zeolite nanoparticle (aTMA) were prepared with the aim of enhancing chlorination resistance and improving membrane performance. The performance of the RO membranes containing aPES and aTMA was evaluated; salt rejection and water flux wer ...
DOI:
10.1016/j.memsci.2013.03.065

17. Novel alkaline anion exchange membranes containing pendant benzimidazolium groups for alkaline fuel cells

Author:
Lin, Xiaocheng; Liang, Xuhao; Poynton, Simon D.; Varcoe, John R.; Ong, Ai Lien; Ran, Jin; Li, Yan; Li, Qiuhua; Xu, Tongwen
Source:
Journal of membrane science 2013 v.443 pp. 193-200
ISSN:
0376-7388
Subject:
anion exchange; artificial membranes; cations; fuel cells; polymers
Abstract:
... Novel benzimidazolium (BIm) functionalized anion exchange membranes (AEMs) are synthesized and characterized for alkaline fuel cells (AFCs). Poly(phenylene oxide) (PPO) is firstly brominated followed by nucleophilic substitution reaction with methylbenzimidazole to obtain the objective BIm-PPO AEMs. Such solution-casting AEMs show good mechanical and thermal stabilities as well as the favorable fu ...
DOI:
10.1016/j.memsci.2013.04.059

18. Novel membrane concept for internal pH control in electrodialysis of amino acids using a segmented bipolar membrane (sBPM)

Author:
Kattan Readi, O.M.; Kuenen, H.J.; Zwijnenberg, H.J.; Nijmeijer, K.
Source:
Journal of membrane science 2013 v.443 pp. 219-226
ISSN:
0376-7388
Subject:
alanine; artificial membranes; ethanolamine; pH; serine; zwitterions
Abstract:
... In electrodialysis of amino acids, pH-changes play an important role in terms of the efficiency of the process. Due to the zwitterionic character of amino acids, small pH changes may result in significant changes in the charge of the amino acids. This decreases either the recovery of the target ions or the product purity. An example of this is the separation of the modification product of serine ( ...
DOI:
10.1016/j.memsci.2013.04.045

19. Plasma activation of porous polytetrafluoroethylene membranes for superior hydrophilicity and separation performances via atomic layer deposition of TiO₂

Author:
Xu, Qiang; Yang, Yang; Yang, Jie; Wang, Xiaozu; Wang, Zhaohui; Wang, Yong
Source:
Journal of membrane science 2013 v.443 pp. 62-68
ISSN:
0376-7388
Subject:
X-radiation; active sites; adsorption; artificial membranes; contact angle; hydrophilicity; hydrophobicity; particulates; polytetrafluoroethylene; porosity; spectroscopy; titanium dioxide; transmission electron microscopy
Abstract:
... Conformal and smooth TiO₂ thin layers were coated on the surface of porous PTFE membranes subjected to a plasma activation process by atomic layer deposition (ALD). In contrast, TiO₂ was deposited on the PTFE surface as globular particulates without plasma activation due to the inert chemical nature of PTFE surface. X-ray photoelectron spectrometry confirmed the formation of functional groups on t ...
DOI:
10.1016/j.memsci.2013.04.061

20. Poly (vinyl chloride)/montmorillonite hybrid membranes for total-heat recovery ventilation

Author:
Liu, Bingxin; Chen, Jing; Du, Xudong; Xue, Lixin
Source:
Journal of membrane science 2013 v.443 pp. 83-92
ISSN:
0376-7388
Subject:
activation energy; artificial membranes; desorption; energy conservation; enthalpy; heat transfer; hydrophilicity; mechanical properties; montmorillonite; poly(vinyl chloride); roughness; temperature; thermal stability; ventilation systems; vinyl chloride; water vapor
Abstract:
... Poly (vinyl chloride)/sodium montmorillonite (Na⁺-MMT) hybrid membranes with varied Na⁺-MMT content were prepared using casting processes for potential use in total heat recovery ventilation systems. The impact of Na⁺-MMT content on the morphology, thermal stability, mechanical property, gas transmission, pore diameters and total heat exchange effectiveness of the membranes were studied. It was ob ...
DOI:
10.1016/j.memsci.2013.04.046