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You searched for: Source 2011 v.383 no.1-2 Remove constraint Source: 2011 v.383 no.1-2 Subject polymers Remove constraint Subject: polymers
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1. Development and characterization of polymer inclusion membranes for the separation and speciation of inorganic As species

Author:
Güell, Raquel; Anticó, Enriqueta; Kolev, Spas D.; Benavente, Juana; Salvadó, Victòria; Fontàs, Clàudia
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 88-95
ISSN:
0376-7388
Subject:
anion exchange; anions; aqueous solutions; arsenates; arsenic; arsenites; cellulose; chlorides; dielectric spectroscopy; liquid membranes; nitrates; permeability; phosphates; plasticizers; polymers; sulfates; wastewater
Abstract:
... This study involves the preparation and optimization of polymer inclusion membranes (PIMs) based on the polymer cellulose triacetate and the extractant (carrier) Aliquat 336 (a mixture of quaternary ammonium chlorides) for the transport of inorganic As species (arsenite and arsenate) from their aqueous solutions. The influence of the composition of the membranes on its extraction and transport pro ...
DOI:
10.1016/j.memsci.2011.08.037

2. Effect of zeolitic imidazolate frameworks on the gas transport performance of ZIF8-poly(1,4-phenylene ether-ether-sulfone) hybrid membranes

Author:
Díaz, Kenya; López-González, Mar; del Castillo, Luis F.; Riande, Evaristo
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 206-213
ISSN:
0376-7388
Subject:
activation energy; artificial membranes; carbon dioxide; diffusivity; ethane; ethylene; gases; glass transition temperature; hydrogen; methane; nitrogen; oxygen; permeability; polymers
Abstract:
... This work reports the permeability of hydrogen, nitrogen, oxygen, carbon dioxide, methane, ethane and ethylene across ZIF-8/poly(1,4-phenylen ether-ether-sulfone) hybrid membranes containing 0, 0.10, 0.20 and 0.30 weight fractions of ZIF-8. The glass transition temperature is independent on the filler content suggesting that the filler does not affect the polymer chains mobility. The study was car ...
DOI:
10.1016/j.memsci.2011.08.042

3. Gas/liquid membrane contactors based on disubstituted polyacetylene for CO₂ absorption liquid regeneration at high pressure and temperature

Author:
Trusov, Alexander; Legkov, Sergey; van den Broeke, Leo J.P.; Goetheer, Earl; Khotimsky, Valery; Volkov, Alexey
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 241-249
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; absorption; carbon dioxide; chemical degradation; chemical structure; hydrophobicity; liquid membranes; nitrogen; oxygen; permeability; polyacetylenes; polymers; temperature
Abstract:
... This work deals with the study of chemical stability and the general behavior of hydrophobic glassy polymers with an excess of free volume fraction, such as poly[1-(trimethylsylil)-1-propyne] (PTMSP), poly[1-(trimethylgermil)-1-propyne] (PTMGP) and poly[4-methyl-2-pentyne] (PMP). The dense membranes based on these polymers have been tested at conditions which are typical for the regeneration of CO ...
DOI:
10.1016/j.memsci.2011.08.058

4. High-temperature proton exchange membranes based on polybenzimidazole and clay composites for fuel cells

Author:
Plackett, David; Siu, Ana; Li, Qingfeng; Pan, Chao; Jensen, Jens Oluf; Nielsen, Søren Fæster; Permyakova, Anastasia A.; Bjerrum, Niels J.
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 78-87
ISSN:
0376-7388
Subject:
X-radiation; ambient temperature; artificial membranes; cations; clay; dimensional stability; electric power; fuel cells; hydrogen; hydrogen bonding; infrared spectroscopy; ion exchange; permeability; phosphoric acid; polymers; relative humidity; salts; tensile strength
Abstract:
... Good dispersion of modified laponite clay was achieved in polybenzimidazole (PBI) solutions which, when cast and allowed to dry, resulted in homogeneous and transparent composite membranes containing up to 20wt% clay in the polymer. The clay was organically modified using a series of ammonium and pyridinium salts with varying polarity and hydrogen-bonding capacity. Clay modification by ion-exchang ...
DOI:
10.1016/j.memsci.2011.08.038

5. Ionic liquid membranes for carbon dioxide–methane separation

Author:
Uchytil, P.; Schauer, J.; Petrychkovych, R.; Setnickova, K.; Suen, S.Y.
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 262-271
ISSN:
0376-7388
Subject:
carbon dioxide; ionic liquids; liquid membranes; methane; permeability; polymers
Abstract:
... The transport of carbon dioxide and methane in polymer containing ionic liquid was studied by a dynamic gas permeation method. Poly(vinylidene fluoride-co-hexafluoropropylene) polymeric membrane (Viton) and two ionic liquids 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([hmim][Tf₂N]) and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf₂N]) were used for pre ...
DOI:
10.1016/j.memsci.2011.08.061

6. N-isopropylacrylamide (NIPAAM) modified cellulose acetate ultrafiltration membranes

Author:
Gorey, Colleen; Escobar, Isabel C.
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 272-279
ISSN:
0376-7388
Subject:
adsorption; ammonium nitrate; artificial membranes; cellulose acetate; ceric ammonium nitrate; desorption; fouling; hydrophilicity; hydrophobicity; phase transition; polymers; temperature; ultrafiltration
Abstract:
... A potentially low fouling membrane was developed by attaching a stimuli-responsive polymer layer on the surface, which offered the potential to collapse or expand the polymer layer with change in temperature. The phase change arose from the existence of a lower critical solution temperature (LCST) such that the polymer precipitated from solution as the temperature was increased. This capability wa ...
DOI:
10.1016/j.memsci.2011.08.066

7. Novel proton conducting membranes based on butylsulfonated poly[2,2′-(m-pyrazolidene)-5,5′-bibenzimidazole] (BS-PPBI): Proton conductivity, acid doping and water uptake properties

Author:
Namazi, Hassan; Ahmadi, Hossein
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 280-288
ISSN:
0376-7388
Subject:
artificial membranes; polymers; relative humidity; solubility; solvents; temperature; tensile strength
Abstract:
... Poly[2,2′-(m-pyrazolidene)-5,5′-bibenzimidazole] (PPBI) was synthesized via polycondensation reaction of pyrazole-3,5-dicarboxylic acid and 3,3′,4,4′-tetraaminobiphenyle (TAB) in polyphosphoric medium. Then the novel proton conducting polymer, butylsulfonated PPBI (BS-PPBI), was synthesized through the ring-opening reaction of 1,4-butanesultone by the reactive N–H groups of PPBI. The solubility of ...
DOI:
10.1016/j.memsci.2011.08.065

8. Preparation and characterization of PES and PSU membrane humidifiers

Author:
Samimi, Armin; Mousavi, Seyyed Abbas; Moallemzadeh, Alireza; Roostaazad, Reza; Hesampour, Mehrdad; Pihlajamäki, Arto; Mänttäri, Mika
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 197-205
ISSN:
0376-7388
Subject:
air; artificial membranes; energy-dispersive X-ray analysis; humidifiers; mechanical properties; nanoparticles; polymers; relative humidity; scanning electron microscopy; temperature; titanium dioxide
Abstract:
... Polysulfone (PSU) and polyethersulfone (PES) porous membranes; and mixed polymer with nanoparticles TiO₂, were prepared for air humidification. The mechanical properties and morphology of these membranes were studied by Tensile tester and SEM/EDX. The effects of membrane composition and operating factors on humidifier performance were investigated. The results revealed that the membrane compositio ...
DOI:
10.1016/j.memsci.2011.08.043

9. The effect of phase inversion promoters on the structure and performance of polyetherimide hollow fiber membrane using in gas–liquid contacting process

Author:
Bakeri, Gh.; Matsuura, T.; Ismail, A.F.
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 159-169
ISSN:
0376-7388
Subject:
absorption; acetic acid; artificial membranes; ethanol; glycerol; methanol; molecular weight; polymers; porosity; solvents; spinning; thermodynamics; viscosity
Abstract:
... Low molecular weight organic compounds were added to the spinning dope as phase inversion promoters and their effects on the structure of polyetherimide (PEI) hollow fibers as well as their performance as membrane contactor were investigated. Water, methanol, ethanol, glycerol and acetic acid were added individually to the solvent NMP to prepare a dope containing 15wt% PEI, 4wt% additive, 81wt% NM ...
DOI:
10.1016/j.memsci.2011.08.048

10. The role of sulphonated polymer and macrovoid-free structure in the support layer for thin-film composite (TFC) forward osmosis (FO) membranes

Author:
Widjojo, Natalia; Chung, Tai-Shung; Weber, Martin; Maletzko, Christian; Warzelhan, Volker
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 214-223
ISSN:
0376-7388
Subject:
artificial membranes; desalination; hydrophilicity; osmosis; polymerization; polymers; seawater; sodium chloride
Abstract:
... A new approach to fabricate thin film composite (TFC) membranes via interfacial polymerization for forward osmosis (FO) applications has revealed that it is possible to design TFC-FO membranes with fully sponge-like structure and likely anti-fouling characteristics while maintaining a high water flux. Not only does the sulphonated material in the substrate of TFC-FO membranes play the key role to ...
DOI:
10.1016/j.memsci.2011.08.041