Is Nafion hydrophilic or hydrophobic?
Nafion consists of hydrophilic sulfonic acid groups dispersed in a hydrophobic matrix of tetrafluoroethylene and perfluoroalkyl ethers [18,24,44–53]. The sulfonic acid groups sorb water swelling the hydrophilic network through which water and protons are transported.
How does a Nafion membrane work?
The Nafion™ polymer transfers water molecules from one side of the membrane to the other by a first order kinetic reaction. This is unlike a porous membrane that depends on the physical size of molecules.
Is Nafion an ion exchange membrane?
Nafion is a widely used cation exchange membrane due to its high specificity toward protons and small cations.
Is Nafion conductive?
Nafion® membranes have high proton conductivity, mechanical and chemical stability in its hydrated state and lower temperature, which make them a promising fuel cell electrolyte for transport, portable and stationary application [1, 2].
How do Nafion membranes dissolve?
Even at 35 °C, which is a possible temperature of portable devices, a solvent containing methanol higher than 60 mol% dissolves the membrane.
Is Nafion an electrolyte?
Nafion is a polymer electrolyte membrane material giving polymer electrolyte membrane fuel cells (PEMFC)s, their name. It is undoubtly the most successful and widely-used polymeric proton conductor for low-temperature fuel cells (Mauritz and Moore, 2004).
Is Nafion polar?
The hydrophilic nature of the ionic groups attract water molecules, which tend to solvate the ionic groups and dissociate the protons from the SO3H (sulfonic acid) group….Nafion.
| Identifiers | |
|---|---|
| Hazard statements | H319 , H335 |
How do you dissolve Nafion?
At 80 °C, solvents containing methanol higher than 20 mol% dissolved the Nafion® membrane, and 90 mol% methanol gave the maximum value of the dissolved fraction. Even at 35 °C, solvents containing methanol higher than 60 mol% dissolved the membrane.
How do you dissolve Nafion pellets?
Nafion is sulfonated teflon (PTFE) which is practically insoluble in commonly used solvents. However, Perfluorocarbon Solvents can be used to dissolve nafion as per the attached article.