Preparation and properties of alkaline anion exchange membrane with semi-interpenetrating polymer networks based on poly(vinylidene fluoride-co -hexafluoropropylene)

2017 ◽  
Vol 135 (5) ◽  
pp. 45775 ◽  
Author(s):  
Chunming Chen ◽  
Bingxin Chen ◽  
Redong Hong
Keyword(s):  
Anion Exchange ◽  
Vinylidene Fluoride ◽  
Polymer Networks ◽  
Anion Exchange Membrane ◽  
Interpenetrating Polymer Networks ◽  
Poly Vinylidene Fluoride ◽  
Exchange Membrane

Fundamental characteristics study of anion-exchange PVDF–SiO2 membranes

2012 ◽  
Vol 66 (11) ◽  
pp. 2343-2348 ◽  
Author(s):  
Xingtao Zuo ◽  
Wenxin Shi ◽  
Shuili Yu ◽  
Jiajie He
Keyword(s):  
Anion Exchange ◽  
Vinylidene Fluoride ◽  
Membrane Surface ◽  
Exchange Capacity ◽  
Anion Exchange Membranes ◽  
Blending Method ◽  
Poly Vinylidene Fluoride ◽  
Potential Applications ◽  
Alkaline Membrane ◽  
Exchange Membrane

A new type of poly(vinylidene fluoride)(PVDF)–SiO2 hybrid anion-exchange membrane was prepared by blending method. The anion-exchange groups were introduced by the reaction of epoxy groups with trimethylamine (TMA). Contact angle between water and the membrane surface was measured to characterize the hydrophilicity change of the membrane surface. The effects of nano-sized SiO2 particles in the membrane-forming materials on the membrane mechanical properties and conductivity were also investigated. The experimental results indicated that PVDF–SiO2 anion-exchange membranes exhibited better water content, ion-exchange capacity, conductivity and mechanic properties, and so may find potential applications in alkaline membrane fuel cells and water treatment processes.

scholarly journals An Investigation of a (Vinylbenzyl) Trimethylammonium and N-Vinylimidazole-Substituted Poly (Vinylidene Fluoride-Co-Hexafluoropropylene) Copolymer as an Anion-Exchange Membrane in a Lignin-Oxidising Electrolyser

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 425
Author(s):  
Patrick J. McHugh ◽  
Arindam K. Das ◽  
Alexander G. Wallace ◽  
Vaibhav Kulshrestha ◽  
Vinod K. Shahi ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Vinylidene Fluoride ◽  
Low Voltage ◽  
Anion Exchange Membrane ◽  
Cell Potential ◽  
Polymer Backbone ◽  
Capital Costs ◽  
Production Of Hydrogen ◽  
Ion Conducting ◽  
Exchange Membrane

Electrolysis is seen as a promising route for the production of hydrogen from water, as part of a move to a wider “hydrogen economy”. The electro-oxidation of renewable feedstocks offers an alternative anode couple to the (high-overpotential) electrochemical oxygen evolution reaction for developing low-voltage electrolysers. Meanwhile, the exploration of new membrane materials is also important in order to try and reduce the capital costs of electrolysers. In this work, we synthesise and characterise a previously unreported anion-exchange membrane consisting of a fluorinated polymer backbone grafted with imidazole and trimethylammonium units as the ion-conducting moieties. We then investigate the use of this membrane in a lignin-oxidising electrolyser. The new membrane performs comparably to a commercially-available anion-exchange membrane (Fumapem) for this purpose over short timescales (delivering current densities of 4.4 mA cm−2 for lignin oxidation at a cell potential of 1.2 V at 70 °C during linear sweep voltammetry), but membrane durability was found to be a significant issue over extended testing durations. This work therefore suggests that membranes of the sort described herein might be usefully employed for lignin electrolysis applications if their robustness can be improved.

Denitrification of ground water by electrodialysis using a new anion exchange membrane

2000 ◽  
Vol 49 (4) ◽  
pp. 211-218
Author(s):  
F. Elhannouni ◽  
M. Belhadj ◽  
M. Taky ◽  
A. El Midaoui ◽  
L. Echihabi ◽  
...  
Keyword(s):  
Ground Water ◽  
Anion Exchange ◽  
Anion Exchange Membrane ◽  
Exchange Membrane

scholarly journals Durability of Anion Exchange Membrane Water Electolyzers

2021 ◽  
Author(s):  
Dongguo Li ◽  
Andrew R Motz ◽  
Chulsung Bae ◽  
Cy Fujimoto ◽  
Gaoqiang Yang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Anion Exchange ◽  
Low Cost ◽  
Anion Exchange Membrane ◽  
Production Technologies ◽  
Exchange Membrane

Interest in the low-cost production of clean hydrogen is growing. Anion exchange membrane water electrolyzers (AEMWEs) are considered one of the most promising sustainable hydrogen production technologies because of their...

scholarly journals Effect of Gas Diffusion Layer Thickness on the Performance of Anion Exchange Membrane Fuel Cells

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 718
Author(s):  
Van Men Truong ◽  
Ngoc Bich Duong ◽  
Hsiharng Yang
Keyword(s):  
Water Management ◽  
Anion Exchange ◽  
Critical Role ◽  
Gas Diffusion ◽  
Anion Exchange Membrane ◽  
Cell Performance ◽  
Water Flooding ◽  
Diffusion Layer Thickness ◽  
Diffusion Layers ◽  
Exchange Membrane

Gas diffusion layers (GDLs) play a critical role in anion exchange membrane fuel cell (AEMFC) water management. In this work, the effect of GDL thickness on the cell performance of the AEMFC was experimentally investigated. Three GDLs with different thicknesses of 120, 260, and 310 µm (denoted as GDL-120, GDL-260, and GDL-310, respectively) were prepared and tested in a single H2/O2 AEMFC. The experimental results showed that the GDL-260 employed in both anode and cathode electrodes exhibited the best cell performance. There was a small difference in cell performance for GDL-260 and GDL-310, while water flooding was observed in the case of using GDL-120 operated at current densities greater than 1100 mA cm−2. In addition, it was found that the GDL thickness had more sensitivity to the AEMFC performance as used in the anode electrode rather than in the cathode electrode, indicating that water removal at the anode was more challenging than water supply at the cathode. The strategy of water management in the anode should be different from that in the cathode. These findings can provide a further understanding of the role of GDLs in the water management of AEMFCs.

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