NMR Investigation of the Dynamics of Confined Water in Nafion-Based Electrolyte Membranes at Subfreezing Temperatures

2009 ◽  
Vol 113 (42) ◽  
pp. 13935-13941 ◽  
Author(s):  
Isabella Nicotera ◽  
Luigi Coppola ◽  
Cesare Oliviero Rossi ◽  
Mohamed Youssry ◽  
Giuseppe A. Ranieri
Keyword(s):  
Confined Water ◽  
Electrolyte Membranes

scholarly journals Effect of hydration on morphology of thin phosphonate block copolymer electrolyte membranes studied by electron tomography

2021 ◽  
Author(s):  
Xi Jiang ◽  
Jing Sun ◽  
Ronald N. Zuckermann ◽  
Nitash P. Balsara
Keyword(s):  
Block Copolymer ◽  
Electron Tomography ◽  
Electrolyte Membranes ◽  
Copolymer Electrolyte

The Effect of Magnetic Field on the Hydration of Nanoscopic Hydrophobic N-Alkane Plates

2011 ◽  
Vol 228-229 ◽  
pp. 1007-1011
Author(s):  
Wei Wei Zhang ◽  
Long Qiu Li ◽  
Guang Yu Zhang ◽  
Hui Juan Dong
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Dynamics Simulation ◽  
Free Energy Barrier ◽  
Confined Water ◽  
Magnetic Exposure ◽  
Hydrophobic Solutes ◽  
The Magnetic Field ◽  
Density Of Water ◽  
Induced Adsorption

The effect of an external magnetic field on the hydration behavior of nanoscopic n-octane plates has been extensively investigated using molecular dynamics simulation in an isothermal-isobaric ensemble. The solute plates with different intermolecular spacing have also been considered to examine the effect of the topology of hydrophobic plates on the adsorption behavior of confined water in the presence of an external magnetic field with an intensity ranging from 0.1T to 1 T. The results demonstrate that magnetic exposure decreases the density of water for the plates with intermolecular spacing of a0 = 4 and 5 Å. This suggests that the free energy barrier for evaporation can be lowered by the applied field, and the hydrophobic solutes consisting of condensed n-octane molecules are apt to aggregate in the aqueous solution. In contrast, the magnetic field improves the dissolution or wetting of solutes comprised of loosely packed n-octane plates of a0=7Å. A magnetic-field-induced adsorption-to-desorption translation, which is in agreement with the experimental results provided by Ozeki, has also been observed for the plates with intermolecular spacing of a0 = 6 Å.

Abnormal in-plane permittivity and ferroelectricity of confined water: From sub-nanometer channels to bulk

2021 ◽  
Vol 154 (11) ◽  
pp. 114503
Author(s):  
Ilyar Hamid ◽  
Hossein Jalali ◽  
Francois. M. Peeters ◽  
Mehdi Neek-Amal
Keyword(s):  
Confined Water

Composite proton exchange membranes produced using chitosan and kaolin solvent-free fluid

2020 ◽  
Vol 40 (6) ◽  
pp. 495-506
Author(s):  
Chun-Chun Huang ◽  
Syang-Peng Rwei ◽  
Yun-Shao Huang ◽  
Yao-Chi Shu
Keyword(s):  
Direct Methanol Fuel Cells ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Solvent Free ◽  
Free Fluid ◽  
Exchange Method ◽  
Polymer Substrates ◽  
Practical Applications ◽  
Inorganic Substances ◽  
Electrolyte Membranes

AbstractIn this study, composite membranes produced by combining both biopolymer chitosan (CS) and kaolin solvent-free fluid (kaolin-SF) were used as substitutes for the electrolyte membranes in direct-methanol fuel cells. To improve the interfacial morphologies between organic and inorganic substances, kaolin-SF was prepared using the ion exchange method. Subsequently, kaolin-SF of various doping proportions was mixed with CS crosslinked with sulfuric acid to produce thin membranes. The results of heat exhaustion and scanning electron microscope image analysis indicated that kaolin-SF was successfully doped into the CS polymer substrates, and this addition enhanced the thermal stability and mechanical properties of the CS polymer substrates. As long as the concentration of kaolin-SF was below 5 wt.%, the water absorption rate and proton conductivity of the CS/kaolin-SF composite membranes increased along with the kaolin-SF content. These results indicate that CS/kaolin-SF composite membranes are suitable for practical applications.

scholarly journals Composite short-side-chain PFSA electrolyte membranes containing selectively modified halloysite nanotubes (HNTs)

2021 ◽  
Author(s):  
Sahng Hyuck Woo ◽  
Aurélie Taguet ◽  
Belkacem Otazaghine ◽  
Alia Akrout ◽  
Sara Cavaliere ◽  
...  
Keyword(s):  
Halloysite Nanotubes ◽  
Side Chain ◽  
Short Side ◽  
Electrolyte Membranes

scholarly journals Confined water quality analysis and assessment of water source in Huan County, Qingyang city

2019 ◽  
Vol 376 ◽  
pp. 012013
Author(s):  
Aiping Hu ◽  
Yang Yang ◽  
Wanfeng Liu
Keyword(s):  
Water Quality ◽  
Water Source ◽  
Quality Analysis ◽  
Confined Water ◽  
Water Quality Analysis

Bicontinuously crosslinked polymer electrolyte membranes with high ion conductivity and mechanical strength

2019 ◽  
Vol 589 ◽  
pp. 117250 ◽  
Author(s):  
Jung Yup Lim ◽  
Dong A. Kang ◽  
Na Un Kim ◽  
Jung Min Lee ◽  
Jong Hak Kim
Keyword(s):  
Mechanical Strength ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membranes ◽  
Ion Conductivity ◽  
Crosslinked Polymer ◽  
Electrolyte Membranes
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