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You searched for: Journal name Journal of membrane science Remove constraint Journal name: Journal of membrane science Publication year rev 7989-2011 Remove constraint Publication year rev: 7989-2011 Source 2011 v.372 no.1-2 Remove constraint Source: 2011 v.372 no.1-2
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1. A mechanical model for single-file transport of water through carbon nanotube membranes

Author:
Yue Chan; James M. Hill
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 57-65
ISSN:
0376-7388
Subject:
artificial membranes; carbon nanotubes; energy; engineering; equations; manufacturing; mathematical models; molecular dynamics; polymers; water flow
Abstract:
... Carbon nanotubes can be embedded into a polymer matrix to manufacture nanotube membranes generating rapid water transport. In particular, for nanotubes of small radii, the single-file transport of water diffusing rapidly and concertedly through densely filled carbon nanotubes has been reported. In this paper, we provide an additional methodology to investigate such problems by employing both appli ...
DOI:
10.1016/j.memsci.2011.01.040

2. Adsorption of linear polymers on polyethersulfone membranes: Contribution of divalent counterions on modifying of hydrophilic–lipophilic balance of polyelectrolyte chain

Author:
Manuel Palencia; Bernabé L. Rivas
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 355-365
ISSN:
0376-7388
Subject:
artificial membranes; polyacrylic acid; acrylic acid; hydrophilicity; ionic strength; metal ions; permeability; adsorption
Abstract:
... The effect of divalent metal ions on conformational changes, size and hydrophilicity of poly(acrylic acid), PAA, in solution as well as its relation with characteristics of adsorbed polymer layers on polyethersulfone membrane, PESm, were studied and analyzed by several techniques. PAA adsorption on PESm in the presence of divalent metal ions was established to be occurring by an adsorption mechani ...
DOI:
10.1016/j.memsci.2011.02.023

3. Amphiphilic polymer conetworks as chiral separation membranes

Author:
Jan Tobis; Lisa Boch; Yi Thomann; Joerg C. Tiller
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 219-227
ISSN:
0376-7388
Subject:
acrylamides; artificial membranes; catalysts; chromatography; crystallization; drugs; enantiomers; enzymes; polymers; solvents
Abstract:
... There is an urgent need for enantiopure chemicals, e.g., as basic compounds for pharmaceuticals. Although great progress has been made to obtain these compound using chiral catalysts, enzymes or even whole cells, it is often not possible or at least not economic to obtain enantiopure compounds. Thus enantioseparation is still required. Besides the elaborate and expensive chromatography and crystal ...
DOI:
10.1016/j.memsci.2011.02.004

4. An investigation of the long-term filtration performance of a membrane bioreactor (MBR): The role of specific organic fractions

Author:
S.I. Patsios; A.J. Karabelas
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 102-115
ISSN:
0376-7388
Subject:
artificial membranes; biodegradability; bioreactors; biosorption; dissolved organic matter; filtration; fouling
Abstract:
... The scope of this paper is to systematically examine the long-term filtration performance of a laboratory scale MBR pilot, under nine different operating states, for elucidating the role of specific organic fractions of the mixed liquor. It is shown that the Solids Retention Time (SRT) is a major parameter influencing the concentration of both Dissolved Organic Matter (DOM) – mainly comprising Sol ...
DOI:
10.1016/j.memsci.2011.01.055

5. Cometabolic degradation of trichloroethylene in a hollow fiber membrane reactor with toluene as a substrate

Author:
Ya Zhao; Zhijun Liu; Fengxia Liu; Zhiyi Li
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 322-330
ISSN:
0376-7388
Subject:
air; air pollution; artificial membranes; biofilm; bioreactors; carbon; microorganisms; pollutants; toluene; trichloroethylene; vinyl chloride; volatile organic compounds
Abstract:
... Contamination of air by volatile organic components (VOCs) is a serious health concern in the present industrial age. To address this issue, a study was devoted to the development of a hollow fiber membrane bioreactor (HMBR), where microorganisms immobilized on the outside of a polyvinylidene fluoride (PVDF) membrane contribute to removing toluene and trichloroethylene (TCE) from air passing throu ...
DOI:
10.1016/j.memsci.2011.02.016

6. Correlation of structural differences between Nafion/polyaniline and Nafion/polypyrrole composite membranes and observed transport properties

Author:
Birgit Schwenzer; Soowhan Kim; M. Vijayakumar; Zhenguo Yang; Jun Liu
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 11-19
ISSN:
0376-7388
Subject:
artificial membranes; polymers; nuclear magnetic resonance spectroscopy; polymerization; hydrophilicity; scanning electron microscopy; vanadium; hydrophobicity; sulfonic acids; infrared spectroscopy
Abstract:
... Polyaniline/Nafion and polypyrrole/Nafion composite membranes, prepared by chemical polymerization, are studied by scanning electron microscopy, infrared and nuclear magnetic resonance spectroscopy. Differences in vanadium ion diffusion through the membranes and in the membranes’ area specific resistance are linked to analytical observations that polyaniline and polypyrrole interact differently wi ...
DOI:
10.1016/j.memsci.2011.01.025

7. Effect of pH on the performance of polyamide/polyacrylonitrile based thin film composite membranes

Author:
Mayur Dalwani; Nieck E. Benes; Gerrald Bargeman; Dimitris Stamatialis; Matthias Wessling
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 228-238
ISSN:
0376-7388
Subject:
artificial membranes; isoelectric point; models; molecular weight; nanofiltration; pH; piperazine; polyacrylonitrile; polyamides; polymerization; porosity; sodium chloride
Abstract:
... In this study the effect of pH on the performance of thin film composite (TFC) nanofiltration (NF) membranes has been investigated at the relevant pH conditions, in the range of pH 1–13. TFC polyamide NF membranes have been fabricated on a polyacrylonitrile support via interfacial polymerization between piperazine in an aqueous phase and trimesoyl chloride in an organic phase. Membrane characteriz ...
DOI:
10.1016/j.memsci.2011.02.012

8. Extraction of betaine from beet molasses using membrane contactors

Author:
Isabel Escudero; M. Olga Ruiz
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 258-268
ISSN:
0376-7388
Subject:
artificial membranes; mathematical models; sodium hydroxide; molasses; sucrose; solvents; sulfonic acids; mass transfer; betaine; beets
Abstract:
... An experimental study of betaine separation involving non-dispersive solvent extraction using hollow fibers is described. The extractant was a solution of dinonylnaphthalene sulfonic acid (DNNSA) in n-heptane and stripping was performed with sodium hydroxide solution. Different operating conditions for the extraction and stripping processes were tested using a single hollow fiber contactor and the ...
DOI:
10.1016/j.memsci.2011.02.008

9. Gas diffusivity, solubility and permeability in polysulfone–poly(ethylene oxide) random copolymer membranes

Author:
Hyo Won Kim; Ho Bum Park
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 116-124
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; composite polymers; diffusivity; ethylene oxide; gases; hydrogen; methane; nitrogen; oxygen; permeability; solubility; sorption
Abstract:
... In this study polysulfone–poly(ethylene oxide) (PSF–PEO) random copolymers were synthesized using a polycondensation reaction via nucleophilic substitution. The PSF–PEO random copolymer membranes were prepared by varying PEO content in a glassy PSF matrix to see the effects of PEO segments on the change of gas transport properties. The PEO content varied from 5mol% (9wt.%) to 20mol% (31wt.%). The ...
DOI:
10.1016/j.memsci.2011.01.053

10. Influence of type and position of functional groups of phenolic compounds on NF/RO performance

Author:
Jesús M. Arsuaga; Arcadio Sotto; María José López-Muñoz; Leen Braeken
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 380-386
ISSN:
0376-7388
Subject:
adsorption; aqueous solutions; artificial membranes; benzene; hydrophobicity; nanofiltration; phenol; reverse osmosis; solutes
Abstract:
... The performance of commercial reverse osmosis (TFC-HR, BW-30) and nanofiltration (NF-90) membranes was evaluated for phenol and eleven phenolic derivatives in aqueous solution. The correlation between flux decline and organic retention was investigated. Molecular hydrophobicity, related to organic solute adsorption on the membrane surface, was studied in order to describe membrane and solute inter ...
DOI:
10.1016/j.memsci.2011.02.020

11. La₍ ₁₋ₓ₎SrₓFe₍₁₋y₎GayO₃₋δ perovskite membrane: Oxygen semi-permeation, thermal expansion coefficient and chemical stability under reducing conditions

Author:
A. Vivet; P.M. Geffroy; T. Chartier; P. Del Gallo; N. Richet
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 373-379
ISSN:
0376-7388
Subject:
artificial membranes; methane; oxygen; strontium; temperature; thermal expansion
Abstract:
... The La₍₁₋ₓ₎SrₓFe₍₁₋y₎GayO₃₋δ perovskites are one of the most promising materials for catalytic membrane reactor because of their excellent oxygen semi-permeation, low thermal expansion coefficient and good chemical stability at high temperature (700–1000°C) under a wide range of oxygen partial pressure (from 0.21 to 10⁻¹⁹atm). In this paper, the thermal expansion coefficient (TEC) and the oxygen s ...
DOI:
10.1016/j.memsci.2011.02.021

12. Liquid–liquid displacement porosimetry for the characterization of virus retentive membranes

Author:
René Israel Peinador; José Ignacio Calvo; Khuong ToVinh; Volkmar Thom; Pedro Prádanos; Antonio Hernández
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 366-372
ISSN:
0376-7388
Subject:
Protoparvovirus; artificial membranes; bacteriophages; dextran; image analysis; porosity; scanning electron microscopy
Abstract:
... Parvovirus retentive membranes made from polyethersulfone (PES) have been characterized by different techniques including dextran and phage retention. Results have been correlated with the pore size distributions of such membranes as obtained by liquid–liquid displacement porosimetry (LLDP). The results of LLDP concerning pore size distributions are proved to be consistent with those obtained by i ...
DOI:
10.1016/j.memsci.2011.02.022

13. Novel dual-stage FO system for sustainable protein enrichment using nanoparticles as intermediate draw solutes

Author:
Ming Ming Ling; Tai-Shung Chung
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 201-209
ISSN:
0376-7388
Subject:
artificial membranes; charge characteristics; gels; hydrophilicity; nanoparticles; osmotic pressure; solutes; surface area
Abstract:
... We have proposed a novel dual-stage FO system and conceptually demonstrated its applications, for the first time, to enrich proteins without causing protein structural changes. Highly hydrophilic nanoparticles were utilized as the draw solute to dehydrate protein solutions in the up-stage FO, while model RO retentate as the draw solute to regenerate the nanoparticle solution in the down-stage FO. ...
DOI:
10.1016/j.memsci.2011.02.003

14. Study on immobilized liquid membrane using ionic liquid and PVDF hollow fiber as a support for CO₂/N₂ separation

Author:
Dae-Hoon Kim; Il-Hyun Baek; Seong-Uk Hong; Hyung-Keun Lee
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 346-354
ISSN:
0376-7388
Subject:
atmospheric pressure; carbon dioxide; ionic liquids; liquid membranes; methanol; nitrogen; permeability; temperature
Abstract:
... This study focuses on improving the CO₂ permeability and stability of the liquid membrane. To improve permeability, polymeric hollow fiber support with a high effective area per unit volume were prepared with various dope composition as a support; to improve stability, the effects of varying the structure of the support and immobilization conditions were observed and analyzed. For the experiment, ...
DOI:
10.1016/j.memsci.2011.02.025

15. Sulfonated poly(arylene thioether phosphine oxide)/sulfonated benzimidazole blends for proton exchange membranes

Author:
Di Liu; Huiying Liao; Ning Tan; Guyu Xiao; Deyue Yan
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 125-133
ISSN:
0376-7388
Subject:
artificial membranes; benzimidazole; ion exchange; mechanical properties; oxidative stability; phosphine; polymers; solubility; thermal stability
Abstract:
... Sulfonated poly(arylene thioether phosphine oxide)s (sPATPO) with high ion exchange capacity generally shows excessive swelling, hampering their application as proton exchange membranes. To reduce their swelling, they were blended with sulfonated benzimidazoles (sPBIs) because they could form strong intermolecular interactions with sPBIs. Such sulfonated benzimidazoles should exhibit excellent sol ...
DOI:
10.1016/j.memsci.2011.01.057

16. Synthesis and characterization of flat-sheet thin film composite forward osmosis membranes

Author:
Jing Wei; Changquan Qiu; Chuyang Y. Tang; Rong Wang; Anthony G. Fane
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 292-302
ISSN:
0376-7388
Subject:
artificial membranes; osmosis; permeability; polyamides; polymerization; porosity; sodium chloride; solutes
Abstract:
... Forward osmosis (FO) technology has become increasingly attractive in the past decades for water related applications and will likely continue to develop rapidly in the future. This calls for the development of high performance FO membranes. Thin film composite (TFC) polyamide FO membranes with tailored support structure were prepared in the current study. The porous polysulfone substrates with fi ...
DOI:
10.1016/j.memsci.2011.02.013

17. A new view of membrane fouling with 3D ultrasonic imaging techniques: Taking the canola oil with phospholipids for example

Author:
Li-Hua Cheng; Yun-Chen Yang; Junghui Chen; Yi-Hsun Lin; Shyh-Hau Wang
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 134-144
ISSN:
0376-7388
Subject:
artificial membranes; canola oil; fouling; models; petroleum; phospholipids; reflectometry; ultrafiltration; ultrasonics; ultrasonography
Abstract:
... Traditional studies on membrane fouling have been generally examined by the experimental evaluation of the flux decline behavior. The present paper attempts to directly distinguish the fouling status under different filtration conditions using the ultrasonic imaging technique. The ultrasonic signals captured during the ultrafiltration of phospholipids from the crude oil are recorded. Then the foul ...
DOI:
10.1016/j.memsci.2011.01.062

18. Bifunctional hydrogel coatings for water purification membranes: Improved fouling resistance and antimicrobial activity

Author:
Young-Hye La; Bryan D. McCloskey; Ratnam Sooriyakumaran; Ankit Vora; Benny Freeman; Majed Nassar; James Hedrick; Alshakim Nelson; Robert Allen
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 285-291
ISSN:
0376-7388
Subject:
Escherichia coli; anti-infective properties; artificial membranes; bovine serum albumin; case studies; coatings; crosslinking; emulsions; filtration; fouling; hydrocolloids; permeability; polyethylene glycol; solubility; water content; water purification
Abstract:
... Bifunctional hydrogel materials having both fouling resistance and antimicrobial activity were prepared by the photopolymerization of polyethylene glycol diacrylate (PEGDA) and a functional monomer containing ammonium salt (RNH₃Cl) in the presence of a photoinitiator. Water was added to the prepolymerization mixture to increase the solubility of the RNH₃Cl monomer and to control the cross-linking ...
DOI:
10.1016/j.memsci.2011.02.005

19. Composite capillary membrane for solvent resistant nanofiltration

Author:
S.M. Dutczak; M.W.J. Luiten-Olieman; H.J. Zwijnenberg; L.A.M. Bolhuis-Versteeg; L. Winnubst; M.A. Hempenius; N.E. Benes; M. Wessling; D. Stamatialis
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 182-190
ISSN:
0376-7388
Subject:
artificial membranes; ceramics; coatings; image analysis; industry; molecular weight; nanofiltration; scanning electron microscopy; solvents; toluene
Abstract:
... Solvent resistant nanofiltration (SRNF) is a membrane separation process allowing for an efficient separation of small molecules of 200–1000gmol⁻¹ from organic solvents. The application of SRNF in industry applications is currently hindered by a limited choice of SRNF membranes and configurations. Despite clear advantages of capillary membranes (high surface to volume ratio, no spacers required an ...
DOI:
10.1016/j.memsci.2011.01.058

20. Cross-linked sulfonated poly (ether ether ketone) (SPEEK)/reactive organoclay nanocomposite proton exchange membranes (PEM)

Author:
Varsha R. Hande; Sangram K. Rath; Swati Rao; M. Patri
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 40-48
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; artificial membranes; benzene; clay; crosslinking; ion exchange; methanol; nanocomposites; oxidative stability; polymers; thermal stability; transmission electron microscopy
Abstract:
... Cross-linked sulfonated poly (ether ether ketone) (SPEEK)/reactive organoclay (Cloisite-30B) nanocomposite membranes were fabricated using 1,4-bis (hydroxymethyl) benzene (BHMB) as cross-linker and Cloisite-30B organoclay as the pseudo cross-linker. The cross-linked SPEEK/clay nanocomposite membranes were prepared via solution intercalation method. Participation of reactive organoclay in the cross ...
DOI:
10.1016/j.memsci.2011.01.042