scholarly journals Anion Exchange Membranes: A Multiscale‐Porous Anion Exchange Membrane for Convenient and Scalable Electrokinetic Concentration of Cationic Species (Adv. Funct. Mater. 5/2021)

2021 ◽  
Vol 31 (5) ◽  
pp. 2170028
Author(s):  
Minsoo Lee ◽  
Hyukjin J. Kwon ◽  
Geunbae Lim
Keyword(s):  
Anion Exchange ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Cationic Species ◽  
Exchange Membrane

scholarly journals Phenolphthalein Anilide Based Poly(Ether Sulfone) Block Copolymers Containing Quaternary Ammonium and Imidazolium Cations: Anion Exchange Membrane Materials for Microbial Fuel Cell

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 454
Author(s):  
Aruna Kumar Mohanty ◽  
Young-eun Song ◽  
Jung-rae Kim ◽  
Nowon Kim ◽  
Hyun-jong Paik
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Good Thermal Stability ◽  
Imidazolium Cations ◽  
Membrane Morphology ◽  
Exchange Membrane

A class of phenolphthalein anilide (PA)-based poly(ether sulfone) multiblock copolymers containing pendant quaternary ammonium (QA) and imidazolium (IM) groups were synthesized and evaluated as anion exchange membrane (AEM) materials. The AEMs were flexible and mechanically strong with good thermal stability. The ionomeric multiblock copolymer AEMs exhibited well-defined hydrophobic/hydrophilic phase-separated morphology in small-angle X-ray scattering and atomic force microscopy. The distinct nanophase separated membrane morphology in the AEMs resulted in higher conductivity (IECw = 1.3–1.5 mequiv./g, σ(OH−) = 30–38 mS/cm at 20 °C), lower water uptake and swelling. Finally, the membranes were compared in terms of microbial fuel cell performances with the commercial cation and anion exchange membranes. The membranes showed a maximum power density of ~310 mW/m2 (at 0.82 A/m2); 1.7 and 2.8 times higher than the Nafion 117 and FAB-PK-130 membranes, respectively. These results demonstrated that the synthesized AEMs were superior to Nafion 117 and FAB-PK-130 membranes.

scholarly journals Influential Mechanism of Natural Organic Matters with Calcium Ion on the Anion Exchange Membrane Fouling Behavior via xDLVO Theory

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 968
Author(s):  
Zhun Ma ◽  
Lu Zhang ◽  
Ying Liu ◽  
Xiaosheng Ji ◽  
Yuting Xu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Interaction Energy ◽  
Anion Exchange ◽  
Natural Organic Matter ◽  
Calcium Ions ◽  
Membrane Fouling ◽  
Membrane Surface ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Exchange Membrane

The fouling mechanism of the anion exchange membrane (AEM) induced by natural organic matter (NOM) in the absence and presence of calcium ions was systematically investigated via the extended Derjaguin–Landau–Verwey–Overbeek (xDLVO) approach. Sodium alginate (SA), humic acid (HA), and bovine serum albumin (BSA) were utilized as model NOM fractions. The results indicated that the presence of calcium ions tremendously aggravated the NOM fouling on the anion exchange membrane because of Ca-NOM complex formation. Furthermore, analysis of the interaction energy between the membrane surface and foulants via xDLVO revealed that short-range acid–base (AB) interaction energy played a significant role in the compositions of interaction energy during the electrodialysis (ED) process. The influence of NOM fractions in the presence of calcium ions on membrane fouling followed the order: SA > BSA > HA. This study demonstrated that the interaction energy was a dominating indicator for evaluating the tendency of anion exchange membranes fouling by natural organic matter.

scholarly journals Quaternized Chitosan-Based Anion Exchange Membrane Composited with Quaternized Poly(vinylbenzyl chloride)/Polysulfone Blend

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2714 ◽  
Author(s):  
Le Thi Tuyet Nhung ◽  
In Yea Kim ◽  
Young Soo Yoon
Keyword(s):  
Anion Exchange ◽  
High Performance ◽  
Ionic Conductivities ◽  
Anion Exchange Membrane ◽  
Commercial Application ◽  
Anion Exchange Membranes ◽  
Quaternized Chitosan ◽  
Structure And Morphology ◽  
Exchange Membrane ◽  
Scanning Electron

An efficient and effective process for the production of high-performance anion exchange membranes (AEMs) is necessary for the commercial application of fuel cells. Therefore, in this study, quaternized poly vinylbenzyl chloride (QVBC) and polysulfone were composited with glycidyltrimethylammonium-chloride-quaternized chitosan (QCS) at different ratios (viz., 1 wt %, 5 wt %, and 10 wt %). The structure and morphology of the membranes were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. Further, the water uptake, swelling ratio, and ionic conductivities of the composite membrane at different wt % of QCS were evaluated. The membrane with 5% QCS exhibited an ionic conductivity of 49.6 mS/cm and 130 mS/cm at 25 °C and 70 °C, respectively.

scholarly journals Imidazolium-based anion exchange membranes for alkaline anion fuel cells: elucidation of the morphology and the interplay between the morphology and properties

Soft Matter ◽  
2016 ◽  
Vol 12 (5) ◽  
pp. 1567-1578 ◽  
Author(s):  
Yue Zhao ◽  
Kimio Yoshimura ◽  
Hideyuki Shishitani ◽  
Susumu Yamaguchi ◽  
Hirohisa Tanaka ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Exchange Membrane

We investigated the morphology of a new graft-type anion exchange membrane by SANS technique.

scholarly journals High performance aliphatic-heterocyclic benzyl-quaternary ammonium radiation-grafted anion-exchange membranes

2016 ◽  
Vol 9 (12) ◽  
pp. 3724-3735 ◽  
Author(s):  
Julia Ponce-González ◽  
Daniel K. Whelligan ◽  
Lianqin Wang ◽  
Rachida Bance-Soualhi ◽  
Ying Wang ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
High Performance ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Exchange Membrane

High performance benzylpyrrolidinium anion-exchange membrane.

Development of a high-performance anion exchange membrane using poly(isatin biphenylene) with flexible heterocyclic quaternary ammonium cations for alkaline fuel cells

2019 ◽  
Vol 7 (12) ◽  
pp. 6883-6893 ◽  
Author(s):  
Shuai Zhang ◽  
Xiuling Zhu ◽  
Cuihong Jin
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
High Performance ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Aryl Ether ◽  
Alkaline Fuel Cells ◽  
Quaternary Ammonium Cations ◽  
Exchange Membrane

A series of quaternary ammonium-tethered poly(isatin biphenylene)s (PIBs) were prepared devoid of alkaline labile aryl ether bonds via superacid-catalyzed polymerization and explored as highly alkaline stable backbones of anion exchange membranes (AEMs).

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