Preparation of Poly (aryl ether) Anion Ionomers with N-Methyl Imidazolium Groups

Anion exchange membranes based on poly(aryl ether oxadiazole)s (FPAEO) were prepared by quaternization of bromomethylated FPAEO with N-methyl imidazole. The structures of the obtained polymers were characterized and confirmed with 1H-NMR measurement. The physical and electrochemical properties of anion exchange membranes were also studied. The conductivity of FPAEO-xMIM membranes were almost higher than 10−2 S/cm at room temperature. In addition, TGA revealed that the AEMs based on imidazolium salts have excellent thermal stability. The experimental results suggested that the obtained AEMs may be potential membranes for anion exchange membrane fuel cells

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

Journal of Materials Chemistry A ◽

10.1039/c8ta11291f ◽

2019 ◽

Vol 7 (12) ◽

pp. 6883-6893 ◽

Cited By ~ 27

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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High conductivity and alkaline stability of anion exchange membrane containing multiple flexible side-chain piperidinium ions

Materials Chemistry Frontiers ◽

10.1039/d1qm00826a ◽

2021 ◽

Author(s):

Zhengwang Tao ◽

Chenyi Wang ◽

Xiaoyan Zhao ◽

Jian Li ◽

Qiang Ren

Keyword(s):

Anion Exchange ◽

Anion Exchange Membrane ◽

High Conductivity ◽

Side Chain ◽

Anion Exchange Membranes ◽

Aryl Ether ◽

Alkaline Stability ◽

Exchange Membrane

A classs of poly(aryl ether sulfone)s anion exchange membranes (PAES-8mPip-x) containing eight flexible piperidinium ions in the repeating unit were prepared using 4,4'-difluorodiphenylsulfone, 2,2'-bis(4-Hydroxyphenyl)-hexafluoropropane, 3,3',5,5'-tetrakis(3'',5''-dimethoxyphenyl)-4,4'-difluorodiphenyl sulfone via aromatic nucleophilic polycondensation,...

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

Membranes ◽

10.3390/membranes11060454 ◽

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.

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Hydroxide Conduction Enhancement of Chitosan Membranes by Functionalized MXene

Materials ◽

10.3390/ma11112335 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2335 ◽

Cited By ~ 5

Author(s):

Lina Wang ◽

Benbing Shi

Keyword(s):

Thermal Stability ◽

Fuel Cell ◽

Anion Exchange ◽

Anion Exchange Membrane ◽

Alkaline Fuel Cell ◽

Chitosan Matrix ◽

Fuel Cell Application ◽

Interfacial Compatibility ◽

Chitosan Membranes ◽

Exchange Membrane

In this study, imidazolium brushes tethered by –NH2-containing ligands were grafted onto the surface of a 2D material, MXene, using precipitation polymerization followed by quaternization. Functionalized MXene was embedded into chitosan matrix to prepare a hybrid alkaline anion exchange membrane. Due to high interfacial compatibility, functionalized MXene was homogeneously dispersed in chitosan matrix, generating continuous ion conduction channels and then greatly enhancing OH− conduction property (up to 172%). The ability and mechanism of OH− conduction in the membrane were elaborated based on systematic tests. The mechanical-thermal stability and swelling resistance of the membrane were evidently augmented. Therefore, it is a promising anion exchange membrane for alkaline fuel cell application.

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

Membranes ◽

10.3390/membranes11120968 ◽

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.

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

Polymers ◽

10.3390/polym12112714 ◽

2020 ◽

Vol 12 (11) ◽

pp. 2714 ◽

Cited By ~ 1

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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