Humidity effect on the transport properties of per‐fluorinated sulfonic acid/ PTFE proton exchange membranes: Positron annihilation study

2021 ◽  
Author(s):  
Mohamed R. M. Elsharkawy ◽  
Hamdy F. M. Mohamed ◽  
Mohamed H. M. Hassanien ◽  
Mahmoud M. Gomaa
Keyword(s):  
Transport Properties ◽  
Positron Annihilation ◽  
Sulfonic Acid ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Humidity Effect ◽  
Positron Annihilation Study

Crosslinked PVA/SSA proton exchange membranes: correlation between physiochemical properties and free volume determined by positron annihilation spectroscopy

2018 ◽  
Vol 20 (44) ◽  
pp. 28287-28299 ◽  
Author(s):  
Mahmoud M. Gomaa ◽  
Christoph Hugenschmidt ◽  
Marcel Dickmann ◽  
Esam E. Abdel-Hady ◽  
Hamdy F. M. Mohamed ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Free Volume ◽  
Positron Annihilation Spectroscopy ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Water Molecules ◽  
High Humidity ◽  
Physiochemical Properties ◽  
Low Humidity ◽  
Volume Size

At low humidity (<30 RH%), water molecules begin to fill the intermolecular spaces in the membrane. At high humidity (80 RH%) the membrane swells; the free volume size increases.

β-Cyclodextrin modified silica nanoparticles for Nafion based proton exchange membranes with significantly enhanced transport properties

2015 ◽  
Vol 3 (30) ◽  
pp. 15607-15615 ◽  
Author(s):  
Wei Jia ◽  
Kai Feng ◽  
Beibei Tang ◽  
Peiyi Wu
Keyword(s):  
Transport Properties ◽  
Silica Nanoparticles ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Modified Silica ◽  
Membrane Performance ◽  
Modified Silica Nanoparticles

Distinctive advantages of SN-β-CD on the membrane performance of Nafion-based PEMs.

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