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

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...

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Bibliographic Details
Published in:Membranes (Basel) 2021-06, Vol.11 (6), p.454
Main Authors: Mohanty, Aruna, Song, Young Eun, Kim, Jung Rae, Kim, Nowon, Paik, Hyun-jong
Format: Article
Language:English
Subjects:
Ammonium
Anion exchange
anion exchange membrane
Anion exchanging
Atomic force microscopy
Biochemical fuel cells
Block copolymers
cardo group
Cation exchanging
Cations
Chemicals
Copolymers
Fuel cells
Fuel technology
Hydrophobicity
hydroxide conductivity
imidazolium
Maximum power density
Mechanical properties
Membranes
microbial fuel cell
Microorganisms
Molecular weight
Morphology
Phenolphthalein
Polymer solubility
quaternary ammonium
Spectrum analysis
Synthesis
Thermal stability
Water uptake
X-ray scattering
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Summary: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.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes11060454