Fabrication of photocured anion-exchange membranes using water-soluble siloxane resins as cross-linking agents and their application in reverse electrodialysis

2019 ◽  
Vol 573 ◽  
pp. 544-553 ◽  
Author(s):  
SeungCheol Yang ◽  
Won-Sik Kim ◽  
Jiyeon Choi ◽  
Young-Woo Choi ◽  
Namjo Jeong ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Water Soluble ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Reverse Electrodialysis

High performance anion exchange membranes obtained through graft architecture and rational cross-linking

2014 ◽  
Vol 470 ◽  
pp. 229-236 ◽  
Author(s):  
Jin Ran ◽  
Liang Wu ◽  
Qianqian Ge ◽  
Yaoyao Chen ◽  
Tongwen Xu
Keyword(s):  
Anion Exchange ◽  
High Performance ◽  
Cross Linking ◽  
Anion Exchange Membranes

Biofouling phenomena on anion exchange membranes under the reverse electrodialysis process

2017 ◽  
Vol 530 ◽  
pp. 232-239 ◽  
Author(s):  
Mahboobeh Vaselbehagh ◽  
Hamed Karkhanechi ◽  
Ryosuke Takagi ◽  
Hideto Matsuyama
Keyword(s):  
Anion Exchange ◽  
Anion Exchange Membranes ◽  
Reverse Electrodialysis

scholarly journals Pore-Filled Anion-Exchange Membranes with Double Cross-Linking Structure for Fuel Cells and Redox Flow Batteries

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4761
Author(s):  
Do-Hyeong Kim ◽  
Moon-Sung Kang
Keyword(s):  
Fuel Cells ◽  
Energy Conversion ◽  
Anion Exchange ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Porous Substrate ◽  
Redox Flow Batteries ◽  
Vanadium Redox ◽  
Double Cross ◽  
Electrochemical Energy

In this work, high-performance pore-filled anion-exchange membranes (PFAEMs) with double cross-linking structures have been successfully developed for application to promising electrochemical energy conversion systems, such as alkaline direct liquid fuel cells (ADLFCs) and vanadium redox flow batteries (VRFBs). Specifically, two kinds of porous polytetrafluoroethylene (PTFE) substrates, with different hydrophilicities, were utilized for the membrane fabrication. The PTFE-based PFAEMs revealed, both excellent electrochemical characteristics, and chemical stability in harsh environments. It was proven that the use of a hydrophilic porous substrate is more desirable for the efficient power generation of ADLFCs, mainly owing to the facilitated transport of hydroxyl ions through the membrane, showing an excellent maximum power density of around 400 mW cm−2 at 60 °C. In the case of VRFB, however, the battery cell employing the hydrophobic PTFE-based PFAEM exhibited the highest energy efficiency (87%, cf. AMX = 82%) among the tested membranes, because the crossover rate of vanadium redox species through the membrane most significantly affects the VRFB efficiency. The results imply that the properties of a porous substrate for preparing the membranes should match the operating environment, for successful applications to electrochemical energy conversion processes.

scholarly journals Surface Modifications of Anion Exchange Membranes for an Improved Reverse Electrodialysis Process Performance: A Review

Membranes ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 160 ◽  
Author(s):  
Francis Kotoka ◽  
Ivan Merino-Garcia ◽  
Svetlozar Velizarov
Keyword(s):  
Anion Exchange ◽  
Membrane Surface ◽  
Surface Modifications ◽  
Dip Coating ◽  
Practical Implementation ◽  
Anion Exchange Membranes ◽  
Layer By Layer ◽  
Process Performance ◽  
Reverse Electrodialysis ◽  
Natural Streams

Reverse electrodialysis (RED) technology represents a promising electro-membrane process for renewable energy harvesting from aqueous streams with different salinity. However, the performance of the key components of the system, that is, the ion exchange membranes, is limited by both the presence of multivalent ions and fouling phenomena, thus leading to a reduced generated net power density. In this context, the behavior of anion exchange membranes (AEMs) in RED systems is more severely affected, due to the undesirable interactions between their positively charged fixed groups and, mostly negatively charged, foulant materials present in natural streams. Therefore, controlling both the monovalent anion permselectivity and the membrane surface hydrophilicity is crucial. In this respect, different surface modification procedures were considered in the literature, to enhance the above-mentioned properties. This review reports and discusses the currently available approaches for surface modifications of AEMs, such as graft polymerization, dip coating, and layer-by-layer, among others, mainly focusing on preparing monovalent permselective AEMs with antifouling characteristics, but also considering hydrophilicity aspects and identifying the most promising modifying agents to be utilized. Thus, the present study aimed at providing new insights for the further design and development of selective, durable, and cost-effective modified AEMs for an enhanced RED process performance, which is indispensable for a practical implementation of this electro-membrane technology at an industrial scale.

scholarly journals Radiation-grafted anion-exchange membranes for reverse electrodialysis: a comparison of N,N,N',N'-tetramethylhexene-1,6-diamine crosslinking (amination stage) and divinylbenzene crosslinking (grafting stage)

2021 ◽  
Author(s):  
Rachida Bance-Souahli ◽  
Mehdi Choolaei ◽  
Sian Franklin ◽  
Terry Willson ◽  
Judy Lee ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Salinity Gradient ◽  
Anion Exchange Membranes ◽  
Reverse Electrodialysis ◽  
Electrochemical Applications ◽  
Salinity Gradient Power

Radiation-grafted anion-exchange membranes (RG-AEM) are being developed to evaluate a range of chemistries that have relevance to a variety of electrochemical applications including reverse electrodialysis (RED) salinity gradient power. RG-AEMs...

Controllable Cross-Linking Anion Exchange Membranes with Excellent Mechanical and Thermal Properties

2018 ◽  
Vol 303 (3) ◽  
pp. 1700462 ◽  
Author(s):  
Chao Wang ◽  
Zhenfeng He ◽  
Xiaofeng Xie ◽  
Xianmin Mai ◽  
Yingchun Li ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Anion Exchange ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Anion Exchange Membranes

Bis-imidazolium based poly(phenylene oxide) anion exchange membranes for fuel cells: the effect of cross-linking

2019 ◽  
Vol 7 (21) ◽  
pp. 13275-13283 ◽  
Author(s):  
Bencai Lin ◽  
Fei Xu ◽  
Fuqiang Chu ◽  
Yurong Ren ◽  
Jianning Ding ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fuel Cells ◽  
Anion Exchange ◽  
Oxidation Stability ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Alkaline Stability ◽  
Phenylene Oxide

Cross-linked membranes showed vastly improved alkaline stability, oxidation stability and mechanical properties compared with uncross-linked membranes due to the effective cross-linked structure.

Highly Stable Anion Exchange Membranes with Internal Cross-Linking Networks

2015 ◽  
Vol 25 (17) ◽  
pp. 2583-2589 ◽  
Author(s):  
Wanxing Xu ◽  
Yuyue Zhao ◽  
Zhizhang Yuan ◽  
Xianfeng Li ◽  
Huamin Zhang ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Stable Anion

Field evaluation of anion exchange membranes as a N soil testing method for grasslands

1999 ◽  
Vol 79 (2) ◽  
pp. 281-294 ◽  
Author(s):  
N. Ziadi ◽  
R. R. Simard ◽  
G. Allard ◽  
J. Lafond
Keyword(s):  
Anion Exchange ◽  
Low Cost ◽  
N Uptake ◽  
Field Evaluation ◽  
Testing Procedure ◽  
Water Soluble ◽  
Soil Testing ◽  
N Availability ◽  
Anion Exchange Membranes ◽  
Forage Production

The in situ use of anion exchange membranes (AEMs) as a soil-testing procedure may provide a more precise evaluation of N availability to forages than standard methods. The main objective of this study was to evaluate the potential of AEMs to predict soil NO3–N availability for forage production in the western part of the province of Quebec, Canada. In 1995 and 1996, AEMs were buried (0–15 cm) in soils at four sites. The fertilizer treatments consisted of five NH4NO3 rates (0, 60, 120, 180, and 240 kg N ha–1). At all sites, NO3−sorbed on the AEMs (NO3AEMs) increased with increasing N fertilizer rates. The NO3AEMs fluxes were significantly related to water soluble NO3–N (NO3w) concentration in soil (R2 varied from 0.35 to 0.98) in the two growing seasons. Forage N uptake was better related with NO3AEMs fluxes (R2 = 0.88 and 0.92 in spring 1996 and 1995, respectively) than with NO3w concentration (R2 = 0.39 and 0.97 in spring 1996 and 1995, respectively). Based on their simplicity, rapidity, and low cost, AEMs have many practical advantages over water NO3–N extraction for assessing grass forage soil N availability in cool continental climates. Key words: Resin, nitrogen, N uptake, grass forage, N mineralization

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