Selective Transport of Sulfur Dioxide through Polymer Membranes. 2. Cellulose Triacetate/Polyacrylate Composite Membranes

1980 ◽  
Vol 19 (4) ◽  
pp. 616-623 ◽  
Author(s):  
Donald L. Kuehne ◽  
Sheldon K. Friedlander
Keyword(s):  
Sulfur Dioxide ◽  
Polymer Membranes ◽  
Composite Membranes ◽  
Cellulose Triacetate ◽  
Selective Transport

scholarly journals The Application of Polymer Inclusion Membranes Based on CTA with 1-alkylimidazole for the Separation of Zinc(II) and Manganese(II) Ions from Aqueous Solutions

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 242 ◽  
Author(s):  
Elzbieta Radzyminska-Lenarcik ◽  
Malgorzata Ulewicz
Keyword(s):  
Transport Process ◽  
Polymer Membranes ◽  
Cellulose Triacetate ◽  
Force Microscopy ◽  
Analysis Techniques ◽  
Membrane Morphology ◽  
Atomic Force ◽  
Feed Phase ◽  
Thermal Analysis Techniques ◽  
Scanning Electron

Polymer cellulose triacetate membranes doped with 1-alkylimidazole as fixed carriers were applied for the investigation of the facilitated transport of Zn(II) and Mn(II) ions from an aqueous sulphate feed phase (cM = 0.001 mol/dm3). For the polymer inclusion membranes (PIMs) doped with 1-alkylimidazole (alkyl – from hexyl up to decyl), the following patterns of transport selectivity were found: Zn(II) > Mn(II). The highest initial flux of Zn(II) ions (2.65 µmol/m2·s) was found for PIMs doped with 1-decyl-imidazole, whereas the best Zn(II)/Mn(II) selectivity coefficients equal to 19.7 were found for 1-hexyl-imidazole. Permeability coefficients for Zn(II) and Mn(II) ions transported across PIMs increase with an increase in the pKa values of 1-alkylimidazole. The polymer membranes of cellulose triacetate-o-NPPE with 1-alkylimidazole were characterised by scanning electron microscopy, non-contact atomic force microscopy and thermal analysis techniques. The influence of membrane morphology on the Zn(II) and Mn(II) transport process was discussed.

scholarly journals Bioinspired polymer vesicles and membranes for biological and medical applications

2016 ◽  
Vol 45 (2) ◽  
pp. 377-411 ◽  
Author(s):  
Cornelia G. Palivan ◽  
Roland Goers ◽  
Adrian Najer ◽  
Xiaoyan Zhang ◽  
Anja Car ◽  
...  
Keyword(s):  
Essential Role ◽  
Polymer Membranes ◽  
Synthetic Polymer ◽  
Biological Molecules ◽  
Medical Applications ◽  
Effective Strategy ◽  
Selective Transport ◽  
Polymer Vesicles ◽  
Living Organisms ◽  
Biological And Medical Applications

Biological membranes play an essential role in living organisms by providing stable and functional compartments, supporting signalling and selective transport. Combining synthetic polymer membranes with biological molecules promises to be an effective strategy to mimic the functions of cell membranes and apply them in artificial systems.

scholarly journals Study on the Durability of Recast Nafion/Montmorillonite Composite Membranes in Low Humidification Conditions

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
A. Pozio ◽  
A. Cemmi ◽  
F. Mura ◽  
A. Masci ◽  
R. F. Silva
Keyword(s):  
Fuel Cell ◽  
Relative Humidity ◽  
Polymer Membranes ◽  
Composite Membranes ◽  
Polymeric Membrane ◽  
Membrane Degradation

Nafion composite membranes were formed from a recasting procedure previously reported by the authors. Montmorillonite (MMT) was used as a filler in the recasting procedure, and dimethylformamide (DMF) was used as the casting solvent. Fuel cell tests performed with the recast membrane showed that at low relative humidity (R.H.) the conductivity of the MMT-containing membranes is 10% higher than that of the MMT-free samples. In order to investigate the durability of such composite perfluorosulfonate membranes, long-term fuel cell experiments have been carried out. Results evidenced a strong effect of low RH on the lifetime of commercial polymer membranes, but the addition of a small silicate amount to the polymeric membrane reduced strongly the membrane degradation.

scholarly journals Selective recovery of cobalt(II) towards lithium(I) from chloride media by transport across polymer inclusion membrane with triisooctylamine

2014 ◽  
Vol 16 (1) ◽  
pp. 15-20 ◽  
Author(s):  
Beata Pospiech
Keyword(s):  
Cellulose Triacetate ◽  
Deionized Water ◽  
Inclusion Membrane ◽  
Chloride Solutions ◽  
Selective Recovery ◽  
Polymer Inclusion Membrane ◽  
Selective Transport ◽  
Nitrophenyl Octyl Ether ◽  
Aqueous Chloride ◽  
Source Phase

Abstract In this work the selective transport of cobalt(II) and lithium(I) ions from aqueous chloride solutions through polymer inclusion membranes (PIMs) is presented. Triisooctylamine (TIOA) has been applied as the ion carrier in membrane. The effects of various parameters on the transport of Co(II) and Li(I) were studied. The obtained results show that Co(II) ions were effectively removed from source phase through PIM containing 32 wt.% TIOA, 22 wt.% CTA (cellulose triacetate) and 46 wt.% ONPOE (o-nitrophenyl octyl ether) or ONPPE (o-nitrophenyl pentyl ether) into deionized water as the receiving phase. The results indicate that there is a possibility of polymer inclusion membranes application to recover Co(II) and Li(I) from aqueous chloride solutions

scholarly journals A Novel Method for Humidity-Dependent Through-Plane Impedance Measurement for Proton Conducting Polymer Membranes

Membranes ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 62 ◽  
Author(s):  
Patrick Heimerdinger ◽  
Andreas Rosin ◽  
Michael A. Danzer ◽  
Thorsten Gerdes
Keyword(s):  
Conducting Polymer ◽  
Electrochemical Impedance ◽  
Polymer Membranes ◽  
Impedance Measurement ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Proton Conducting ◽  
Cell Parameters ◽  
Anisotropic Composite

In this study, we introduce a through-plane electrochemical measurement cell for proton conducting polymer membranes (PEM) with the ability to vary temperature and humidity. Model Nafion and 3M membranes, as well as anisotropic composite membranes, were used to compare through plane and in plane conductivity. Electrochemical impedance spectroscopy (EIS) was applied to evaluate the proton conductivity of bare proton exchange membranes. In the Nyquist plots, all membranes showed a straight line with an angle of 60–70 degrees to the Z’-axis. Equivalent circuit modeling and linear extrapolation of the impedance data were compared to extract the membrane resistance. System and cell parameters such as high frequency inductance, contact resistance and pressure, interfacial capacitance were observed and instrumentally minimized. Material-related effects, such as swelling of the membranes and indentation of the platinum mesh electrodes were examined thoroughly to receive a reliable through-plane conductivity. The received data for model Nafion and 3M membranes were in accordance with literature values for in-plane and through-plane conductivity of membrane electrode assemblies. Anisotropic composite membranes underlined the importance of a sophisticated measurement technique that is able to separate the in-plane and through-plane effects in polymer electrolytes.

scholarly journals Application of Polymer Inclusion Membranes Doped with Alkylimidazole to Separation of Silver and Zinc Ions from Model Solutions and after Battery Leaching

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3103 ◽  
Author(s):  
Elzbieta Radzyminska-Lenarcik ◽  
Malgorzata Ulewicz ◽  
Ilona Pyszka
Keyword(s):  
Silver Oxide ◽  
Cellulose Triacetate ◽  
Water And Wastewater Treatment ◽  
Force Microscopy ◽  
Selective Transport ◽  
Atomic Force ◽  
Model Solutions ◽  
Leaching Solution ◽  
Water And Wastewater ◽  
Nitrate Solutions

New materials, such as polymer inclusion membranes, can be used for water and wastewater treatment. In this paper, the selective transport of silver(I) and zinc(II) ions from nitrate solutions through the polymer inclusion membranes (PIMs), which consist of cellulose triacetate as a polymeric support, o-nitrophenyl pentyl ether as a plasticizer, and either 1-hexylimidazole (1) or 1-hexyl-2-methylimidazole (2) as an ion carrier, is studied. Both Zn(II) and Ag(I) model solutions (CM = 0.001 M, pH = 6.5), as well as the solutions after the leaching of a spent battery with a silver–zinc cell (silver-oxide battery), are tested. The results show that Zn(II) ions are effectively transported through PIMs containing either carrier, whereas Ag(I) is more easily transported through PIMs doped with (1). In the case of the leaching solution after 24 h transport, the recovery coefficients of Ag(I) and Zn(II) for PIMs doped with (1) are 86% and 90%, respectively, and for PIMs doped with (2), 47% and 94%, respectively. The influence of basicity and structure of carrier molecules on transport kinetics is discussed as well. PIMs are characterized by using an atomic force microscopy (AFM) technique.

Challenges and recent advances in MOF–polymer composite membranes for gas separation

2016 ◽  
Vol 3 (7) ◽  
pp. 896-909 ◽  
Author(s):  
Yuanyuan Zhang ◽  
Xiao Feng ◽  
Shuai Yuan ◽  
Junwen Zhou ◽  
Bo Wang
Keyword(s):  
Gas Separation ◽  
Polymer Composite ◽  
Recent Progress ◽  
Polymer Membranes ◽  
Composite Membranes ◽  
Recent Advances

This review summarizes the recent progress in the fabrication of MOF-polymer membranes including the challenges, difficulties and corresponding solutions.

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