Results 241 to 250 of about 3,052,474 (291)

Metal-Cation-Based Anion Exchange Membranes

Journal of the American Chemical Society, 2012
Here we present the first metal-cation-based anion exchange membranes (AEMs), which were synthesized by copolymerization and cross-linking of a norbornene monomer functionalized with a water-soluble bis(terpyridine)ruthenium(II) complex and dicyclopentadiene. Each ruthenium complex has two associated counteranions, unlike most ammonium- and phosphonium-
Yongping, Zha, Melanie L, Disabb-Miller, Zachary D, Johnson, Michael A, Hickner, Gregory N, Tew   +4 more
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Microheterogeneity in Native and Cation-Exchanged Nafion Membranes

The Journal of Physical Chemistry B, 2012
2-(4'-Pyridyl)benzimidazole (4PBI) has been used to investigate the microheterogeneity of water nanochannels of Nafion membranes at two different hydration levels. Native as well as cation-exchanged Nafion membranes are found to protonate one of the two monoprotonated forms of 4PBI selectively.
IYER, ESS, DATTA, A
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Modification of properties of ion exchange membranes V. Structure of cationic polyelectrolyte on the surface of cation exchange membranes

Colloid and Polymer Science, 1978
Electrodialytic transport properties of cation exchange membrane are changed by adhesion of polyethylene imine on the membrane surface. The effect of conformation of polyethylene imine molecules on the transport properties of the membrane, thickness of adherent layer and mechanism of adhesion were discussed.
T. Sata, K. Izuo
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Advancements in Anion Exchange Membrane Cations

ECS Transactions, 2015
Anion-exchange membrane fuel cells (AME-FCs) are of increasingly popular interest as they enable the use of non-Pt fuel cell catalysts, the primary cost limitation of proton exchange membrane fuel cells. Benzyltrimethyl ammonium (BTMA) is the standard cation that has historically been utilized as the hydroxide conductor in AEMs.
Matthew R Sturgeon, Hai Long, A M Park, Bryan S Pivovar   +3 more
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Cation exchange membranes as solid solutions

Journal of Membrane Science, 1985
Abstract The ion exchange equilibrium between KCl and SrCl2 solutions and the cation selective membrane CR61 AZL386 has been examined. Equilibrium isotherms are measured for membrane—electrolyte equilibria for two total concentrations of Cl−in the electrolyte solution and at three different temperatures.
T. Holt, T. Førland, S.K. Ratkje
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Alkali‐Stable Cations and Anion Exchange Membranes

Chemistry – A European Journal
Abstract Anion exchange membranes (AEMs) based energy conversion and storage devices have attracted attention as an innovative technology due to their advantageous alkaline catalytic kinetics and cost‐effectiveness. AEMs play a crucial role in these devices and have shown significant progress in terms of ionic conductivity, mechanical
Qihang Zhang, Rong Ren, Liqiang Yin, Licheng Sun   +3 more
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Studies on heterogeneous cation-exchange membranes

Reactive and Functional Polymers, 2000
Abstract As the preparation of interpolymer type ion-exchange membranes involves the use of hazardous chemicals like chlorosulfonic acid and chloromethyl ether, it was envisaged to prepare heterogeneous membranes through a simple technique involving casting of a solution containing a binder and a polyelectrolyte.
Punita V Vyas, B.G Shah, G.S Trivedi, P Ray, S.K Adhikary, R Rangarajan   +5 more
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Water transport in cation exchange membranes

Journal of Membrane Science, 1992
Abstract The time variation in emf caused by pressure differences has been used to find transference coefficients of water as well as water permeabilities in ion exchange membranes. Previous experimental methods have been corrected and facilitated. The cation exchange membrane CR61 AZL 386 was investigated. Equilibrium solutions contained 10−4 kmol-m−
Tatsuhiro Okada, Signe Kjelstrup Ratkje, Harald Hanche-Olsen   +2 more
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Forbidden ion transport through cation exchange membranes

Talanta
Cation exchange membranes (CEMs) are widely used in many applications. The fixed anionic groups e.g., COO-, -SO3-, etc. in the polymer matrix ideally allows the passage only of oppositely charged cations, driven by a potential or a concentration gradient. Anions, charged negative, the same as the membrane matrix, cannot pass through the membrane due to
Chandan K, Chaudhary, Purnendu K, Dasgupta   +1 more
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Electrochemical properties of cation exchange membranes

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1987
An investigation has been carried out on the effect of concentration and temperature of electrolytes on the conductivity and transport number of a cation-exchange membrane. The membrane was prepared by modification of high-molecular weight polyethylene (Mn= 1.19 × 106) with styrene and divinylbenzene and following sulphonation.
A. D. Dimov, I. Alexandrova
openaire   +1 more source