Thermodynamics of Water Vapor Uptake in Perfluorosulfonic Acid Membranes

1999 ◽  
Vol 146 (6) ◽  
pp. 2049-2053 ◽  
Author(s):  
Peter Futerko ◽  
I‐Ming Hsing
Keyword(s):  
Water Vapor ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes

Water Uptake of Perfluorosulfonic Acid Membranes from Liquid Water and Water Vapor

1994 ◽  
Vol 141 (6) ◽  
pp. 1493-1498 ◽  
Author(s):  
James T. Hinatsu ◽  
Minoru Mizuhata ◽  
Hiroyasu Takenaka
Keyword(s):  
Water Vapor ◽  
Water Uptake ◽  
Liquid Water ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes

Ionic Transport and Water Vapor Uptake of Ammonium Exchanged Perfluorosulfonic Acid Membranes

2012 ◽  
Vol 159 (3) ◽  
pp. B265-B269 ◽  
Author(s):  
Thiago Lopes ◽  
Dae Sik Kim ◽  
Yu Seung Kim ◽  
Fernando Henry Garzon
Keyword(s):  
Water Vapor ◽  
Ionic Transport ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes

scholarly journals Correlated interfacial water transport and proton conductivity in perfluorosulfonic acid membranes

2019 ◽  
Vol 116 (18) ◽  
pp. 8715-8720 ◽  
Author(s):  
Xiao Ling ◽  
Mischa Bonn ◽  
Katrin F. Domke ◽  
Sapun H. Parekh
Keyword(s):  
Water Transport ◽  
Proton Conductivity ◽  
Proton Exchange ◽  
Interfacial Water ◽  
Total Water ◽  
Perfluorosulfonic Acid ◽  
Water Diffusivity ◽  
Perfluorosulfonic Acid Membranes ◽  
Coherent Raman

Water must be effectively transported and is also essential for maximizing proton conductivity within fuel-cell proton-exchange membranes (PEMs). Therefore, identifying relationships between PEM properties, water transport, and proton conductivity is essential for designing optimal PEMs. Here, we use coherent Raman spectroscopy to quantify real-time, in situ diffusivities of water subspecies, bulk-like and nonbulk-like (interfacial) water, in five different perfluorosulfonic acid (PFSA) PEMs. Although the PEMs were chemically diverse, water transport within them followed the same rule: Total water diffusivity could be represented by a linear combination of the bulk-like and interfacial water diffusivities. Moreover, the diffusivity of interfacial water was consistently larger than that of bulk-like water. These measurements of microscopic transport were combined with through-plane proton conductivity measurements to reveal the correlation between interfacial water transport and proton conductivity. Our results demonstrate the importance of maximizing the diffusivity and fractional contribution of interfacial water to maximize the proton conductivity in PFSA PEMs.

Potentiometric multisensory system based on perfluorosulfonic acid membranes and carbon nanotubes for sulfacetamide determination in pharmaceuticals

2020 ◽  
Vol 873 ◽  
pp. 114435
Author(s):  
Ekaterina Safronova ◽  
Anna Parshina ◽  
Tatyana Kоlganova ◽  
Anastasia Yelnikova ◽  
Olga Bobreshova ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes ◽  
Multisensory System
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