Imidazolium-Based Grafted Anion Exchange Membranes: Interplay between the Morphology and Anion Transport Behavior

2018 ◽  
Vol 86 (13) ◽  
pp. 619-627 ◽  
Author(s):  
Yue Zhao ◽  
Kimio Yoshimura ◽  
Akihiro Hiroki ◽  
Yoshihiro Kishiyama ◽  
Hideyuki Shishitani ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Anion Transport ◽  
Anion Exchange Membranes ◽  
Transport Behavior

Imidazolium-Based Anion Exchange Membranes for Alkaline Anion Fuel Cells: Interplay between Morphology and Anion Transport Behavior

2019 ◽  
Vol 166 (8) ◽  
pp. F472-F478 ◽  
Author(s):  
Yue Zhao ◽  
Kimio Yoshimura ◽  
Harufumi Takamatsu ◽  
Akihiro Hiroki ◽  
Yoshihiro Kishiyama ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Anion Transport ◽  
Anion Exchange Membranes ◽  
Transport Behavior

scholarly journals Transport and Co-Transport of Carboxylate Ions and Ethanol in Anion Exchange Membranes

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2885
Author(s):  
Jung Min Kim ◽  
Yi-hung Lin ◽  
Brock Hunter ◽  
Bryan S. Beckingham
Keyword(s):  
Anion Exchange ◽  
Co2 Reduction ◽  
Radical Copolymerization ◽  
Anion Exchange Membranes ◽  
Free Radical Copolymerization ◽  
Transport Behavior ◽  
Electrochemical Devices ◽  
Overall Performance ◽  
Improve Device

Understanding multi-component transport behavior through hydrated dense membranes is of interest for numerous applications. For the particular case of photoelectrochemical CO2 reduction cells, it is important to understand the multi-component transport behavior of CO2 electrochemical reduction products including mobile formate, acetate and ethanol in the ion exchange membranes as one role of the membrane in these devices is to minimize the permeation of these products. Anion exchange membranes (AEM) have been employed in these and other electrochemical devices as they act to facilitate the transport of common electrolytes (i.e., bicarbonates). However, as they act to facilitate the transport of carboxylates as well, thereby reducing the overall performance, the design of new AEMs is necessary to improve device performance through the selective transport of the desired ion(s) or electrolyte(s). Here, we investigate the transport behavior of formate and acetate and their co-transport with ethanol in two types of AEMs: (1) a crosslinked AEM prepared by free-radical copolymerization of a monomer with a quaternary ammonium (QA) group and a crosslinker, and (2) Selemion® AMVN. We observe a decrease in diffusivities to carboxylates in co-diffusion. We attribute this behavior to charge screening by the co-diffusing alcohol, which reduces the electrostatic attraction between QAs and carboxylates.

Facilitating Anion Transport in Polyolefin-Based Anion Exchange Membranes via Bulky Side Chains

2016 ◽  
Vol 8 (35) ◽  
pp. 23321-23330 ◽  
Author(s):  
Min Zhang ◽  
Chunrong Shan ◽  
Lei Liu ◽  
Jiayou Liao ◽  
Quan Chen ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Anion Transport ◽  
Side Chains ◽  
Anion Exchange Membranes

Bicarbonate and chloride anion transport in anion exchange membranes

2016 ◽  
Vol 514 ◽  
pp. 125-134 ◽  
Author(s):  
Alina Amel ◽  
Nir Gavish ◽  
Liang Zhu ◽  
Dario R. Dekel ◽  
Michael A. Hickner ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Anion Transport ◽  
Chloride Anion ◽  
Anion Exchange Membranes

Polymeric materials as anion-exchange membranes for alkaline fuel cells

2011 ◽  
Vol 36 (11) ◽  
pp. 1521-1557 ◽  
Author(s):  
Guillaume Couture ◽  
Ali Alaaeddine ◽  
Frédéric Boschet ◽  
Bruno Ameduri
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Polymeric Materials ◽  
Anion Exchange Membranes ◽  
Alkaline Fuel Cells

High‐capacity multimodal anion‐exchange membranes for polishing of therapeutic proteins

2021 ◽  
Author(s):  
Joshua Osuofa ◽  
Daniel Henn ◽  
Jinxiang Zhou ◽  
Anna Forsyth ◽  
Scott M. Husson
Keyword(s):  
Anion Exchange ◽  
Therapeutic Proteins ◽  
High Capacity ◽  
Anion Exchange Membranes

scholarly journals Innovative BPPO Anion Exchange Membranes Formulation Using Diffusion Dialysis-Enhanced Acid Regeneration System

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 311
Author(s):  
Muhammad Imran Khan ◽  
Majeda Khraisheh ◽  
Fares AlMomani
Keyword(s):  
Anion Exchange ◽  
Room Temperature ◽  
Feed Solution ◽  
Exchange Capacity ◽  
Anion Exchange Membranes ◽  
Regeneration System ◽  
Waste Streams ◽  
Acid Recovery ◽  
Aqueous Waste ◽  
Diffusion Dialysis

Recycling of acid from aqueous waste streams is crucial not only from the environmental point of view but also for maturing the feasible method (diffusion dialysis). Anion exchange membrane (AEM)–based diffusion dialysis process is one of the beneficial ways to recover acid from aqueous waste streams. In this article, the synthesis of a series of brominated poly (2, 6–dimethyl-1, 4–phenylene oxide) (BPPO)-based anion exchange membranes (AEMs) through quaternization with triphenylphosphine (TPP) were reported for acid recovery via diffusion dialysis process. The successful synthesis of the prepared membranes was confirmed by Fourier transform infrared (FTIR) spectroscopy. The as-synthesized anion exchange membranes represented water uptake (WR) of 44 to 66%, ion exchange capacity of (IEC) of 1.22 to 1.86 mmol/g, and linear swelling ratio (LSR) of 8 to 20%. They exhibited excellent thermal, mechanical, and acid stability. They showed homogeneous morphology. The acid recovery performance of the synthesized AEMs was investigated in a two compartment stack using simulated mixture of HCl and FeCl2 as feed solution at room temperature. For the synthesized anion exchange membranes TPP–43 to TPP–100, the diffusion dialysis coefficient of acid (UH+) was in the range of 6.7 to 26.3 (10−3 m/h) whereas separation factor (S) was in the range of 27 to 49 at 25 °C. Obtained results revealed that diffusion dialysis performance of the synthesized AEMs was higher than the commercial membrane DF–120B (UH+ = 0.004 m/h, S = 24.3) at room temperature. It showed that the prepared AEMs here could be excellent candidates for the diffusion dialysis process.

scholarly journals Transport Characteristics of CJMAED™ Homogeneous Anion Exchange Membranes in Sodium Chloride and Sodium Sulfate Solutions

2021 ◽  
Vol 22 (3) ◽  
pp. 1415
Author(s):  
Veronika Sarapulova ◽  
Natalia Pismenskaya ◽  
Valentina Titorova ◽  
Mikhail Sharafan ◽  
Yaoming Wang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
Volume Fraction ◽  
Exchange Capacity ◽  
Polymer Materials ◽  
Transport Numbers ◽  
Anion Exchange Membranes ◽  
Microheterogeneous Model ◽  
Pass Through ◽  
Pes Membrane

The interplay between the ion exchange capacity, water content and concentration dependences of conductivity, diffusion permeability, and counterion transport numbers (counterion permselectivity) of CJMA-3, CJMA-6 and CJMA-7 (Hefei Chemjoy Polymer Materials Co. Ltd., China) anion-exchange membranes (AEMs) is analyzed using the application of the microheterogeneous model to experimental data. The structure–properties relationship for these membranes is examined when they are bathed by NaCl and Na2SO4 solutions. These results are compared with the characteristics of the well-studied homogenous Neosepta AMX (ASTOM Corporation, Japan) and heterogeneous AMH-PES (Mega a.s., Czech Republic) anion-exchange membranes. It is found that the CJMA-6 membrane has the highest counterion permselectivity (chlorides, sulfates) among the CJMAED series membranes, very close to that of the AMX membrane. The CJMA-3 membrane has the transport characteristics close to the AMH-PES membrane. The CJMA-7 membrane has the lowest exchange capacity and the highest volume fraction of the intergel spaces filled with an equilibrium electroneutral solution. These properties predetermine the lowest counterion transport number in CJMA-7 among other investigated AEMs, which nevertheless does not fall below 0.87 even in 1.0 eq L−1 solutions of NaCl or Na2SO4. One of the reasons for the decrease in the permselectivity of CJMAED membranes is the extended macropores, which are localized at the ion-exchange material/reinforcing cloth boundaries. In relatively concentrated solutions, the electric current prefers to pass through these well-conductive but nonselective macropores rather than the highly selective but low-conductive elements of the gel phase. It is shown that the counterion permselectivity of the CJMA-7 membrane can be significantly improved by coating its surface with a dense homogeneous ion-exchange film.

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