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You searched for: Journal Journal of membrane science Remove constraint Journal: Journal of membrane science Publication Year 2011 Remove constraint Publication Year: 2011 Source 2011 v.367 no.1-2 Remove constraint Source: 2011 v.367 no.1-2 Subject sorption Remove constraint Subject: sorption Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
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1. Enantioselective cholesteric liquid crystalline membranes characterized using nonchiral HPLC with circular dichroism detection

Author:
Han, Sangil; Martin, Stephen M.
Source:
Journal of membrane science 2011 v.367 no.1-2 pp. 1-6
ISSN:
0376-7388
Subject:
activation energy; artificial membranes; cellulose; crystals; detection limit; drugs; enantiomers; high performance liquid chromatography; liquids; nitrates; permeability; phase transition; porosity; sorption; temperature; ultraviolet radiation
Abstract:
... Novel porous membranes for optical resolution consisting of cholesteric liquid crystalline (LC) phases (mixtures of 4-pentyl-4′-cyanobiphenyl – 5CB – and cholesteryl oleyl carbonate – COC) impregnated in porous cellulose nitrate supports were prepared, and their permeability and selectivity for 1-phenylethanol were studied. The 5CB/COC membranes exhibited 1-phenylethanol enantiomer selectivities b ...
DOI:
10.1016/j.memsci.2010.09.039

2. Experimental and numerical investigations of moisture permeation through membranes

Author:
Min, Jingchun; Hu, Teng; Song, Yaozu
Source:
Journal of membrane science 2011 v.367 no.1-2 pp. 174-181
ISSN:
0376-7388
Subject:
air; air flow; artificial membranes; diffusivity; humidity; membrane permeability; sorption; water uptake; water vapor
Abstract:
... Experimental and numerical combined studies were carried out to investigate the effects of membrane properties and operating condition on water vapor (moisture) permeation through membranes. Experiments were conducted with water vapor transferring from a highly to a less humid air across membrane due to the water vapor concentration difference between the two sides of membrane, and numerical simul ...
DOI:
10.1016/j.memsci.2010.10.064

3. Mixed matrix membranes prepared from poly(vinyl alcohol) (PVA) incorporated with zeolite 4A-graft-poly(2-hydroxyethyl methacrylate) (zeolite-g-PHEMA) for the pervaporation dehydration of water–acetone mixtures

Author:
Khoonsap, Santi; Amnuaypanich, Sittipong
Source:
Journal of membrane science 2011 v.367 no.1-2 pp. 182-189
ISSN:
0376-7388
Subject:
acetone; adhesion; artificial membranes; composite materials; crosslinking; liquids; organosilicon compounds; pervaporation; polymerization; polyvinyl alcohol; sorption; temperature; water; zeolites
Abstract:
... The mixed matrix membranes (MMMs) were prepared from the crosslinked PVA incorporated with the zeolite 4A-graft-PHEMA. The grafting on the zeolite was successfully undertaken via the silylation of vinyl-silane followed by graft polymerization of HEMA monomer. The swelling of the membranes in various concentrations of water–acetone mixtures revealed a decrease in the swelling degree as the zeolite ...
DOI:
10.1016/j.memsci.2010.10.058

4. On the effects of plasticization in CO₂/light gas separation using polymeric solubility selective membranes

Author:
Reijerkerk, Sander R.; Nijmeijer, Kitty; Ribeiro, Cláudio P., Jr.; Freeman, Benny D.; Wessling, Matthias
Source:
Journal of membrane science 2011 v.367 no.1-2 pp. 33-44
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; chemical concentration; composite polymers; gases; hydrogen; membrane permeability; methane; pressure; separation; solubility; sorption; temperature
Abstract:
... This paper reports pure and mixed gas CO₂/H₂ and CO₂/CH₄ membrane separation performance of a highly permeable poly(ethylene oxide) based multi-block copolymer. Permeation and sorption properties have been studied over a wide temperature (−10°C to +35°C) and pressure range (up to 25bar partial pressure of CO₂). In particular, we address the effect of plasticization by CO₂. A strong dependency of C ...
DOI:
10.1016/j.memsci.2010.10.035

5. Organic vapour transport in glassy perfluoropolymer membranes: A simple semi-quantitative approach to analyze clustering phenomena by time lag measurements

Author:
Jansen, Johannes Carolus; Friess, Karel; Drioli, Enrico
Source:
Journal of membrane science 2011 v.367 no.1-2 pp. 141-151
ISSN:
0376-7388
Subject:
acetone; artificial membranes; diffusion; diffusivity; ethanol; fluorocarbon polymers; least squares; methanol; methylene chloride; models; solvents; sorption; vapors
Abstract:
... In this paper the gas and vapour transport through four different high fractional free volume amorphous glassy perfluoropolymers is studied, namely Teflon® AF and Hyflon® AD. The paper describes a new approach to evaluate the anomalous diffusion of alcohol vapours in these materials. Permanent gases and the vapours of aprotic solvents like acetone and dichloromethane exhibit normal behaviour. For ...
DOI:
10.1016/j.memsci.2010.10.063

6. Sorption and pervaporation with poly(3-hydroxybutyrate) membranes: methanol/methyl tert-butyl ether mixtures

Author:
Villegas, Mercedes; Vidaurre, Elza F. Castro; Habert, Alberto C.; Gottifredi, Juan C.
Source:
Journal of membrane science 2011 v.367 no.1-2 pp. 103-109
ISSN:
0376-7388
Subject:
chemical concentration; crystal structure; methanol; permeability; pervaporation; phase transition; polymers; solubility; sorption; temperature
Abstract:
... Sorption and pervaporation experiments to study the methanol/methyl tert-butyl ether (MTBE) separation, were carried out with poly(3-hydroxybutyrate) (PHB) membranes. Single component tests showed that PHB membranes were methanol selective and pervaporation fluxes increased with temperature, as expected. However, permeability coefficients showed quite different behavior for each component. Mixture ...
DOI:
10.1016/j.memsci.2010.10.051