scholarly journals Investigations of the ex situ ionic conductivities at 30 °C of metal-cation-free quaternary ammonium alkaline anion-exchange membranes in static atmospheres of different relative humidities

2007 ◽  
Vol 9 (12) ◽  
pp. 1479-1486 ◽  
Author(s):  
John R. Varcoe
Keyword(s):  
Anion Exchange ◽  
Metal Cation ◽  
Quaternary Ammonium ◽  
Ionic Conductivities ◽  
Ex Situ ◽  
Anion Exchange Membranes

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 Side-chain-type anion exchange membranes bearing pendant quaternary ammonium groups via flexible spacers for fuel cells

2016 ◽  
Vol 4 (36) ◽  
pp. 13938-13948 ◽  
Author(s):  
Chen Xiao Lin ◽  
Xiao Ling Huang ◽  
Dong Guo ◽  
Qiu Gen Zhang ◽  
Ai Mei Zhu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Side Chain ◽  
Anion Exchange Membranes ◽  
Flexible Spacer ◽  
Chain Type

Highly conductive anion exchange membranes can be achieved by tuning the length of flexible spacer between backbone and quaternary ammonium groups.

Synthesis and properties of poly(arylene ether sulfone) anion exchange membranes with pendant benzyl-quaternary ammonium groups

Polymer ◽  
2017 ◽  
Vol 121 ◽  
pp. 137-148 ◽  
Author(s):  
Qian Shi ◽  
Pei Chen ◽  
Xueliang Zhang ◽  
Qiang Weng ◽  
Xinbing Chen ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membranes ◽  
Arylene Ether

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.

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