Untreated Nafion 212 is 50.8 micrometers (2 mil) thick. The membrane is positioned between a backing film and a coversheet.
DuPont™ Nafion® 212 membranes are based on chemically stabilized perfluorosulfonic acid/PTFE copolymer in the acid (H+) form, and exhibit substantially lower fluoride ion release compared to the non-stabilized polymer – a sign of improved chemical durability. Nafion PFSA membranes are widely used for Proton Exchange Membrane (PEM) fuel cells and water electrolyzers. The membrane performs as a separator and solid electrolyte in a variety of electrochemical cells that require the membrane to selectively transport cations across the cell junction. The polymer is chemically resistant and durable.
View the Nafion product data sheets below for more information on each type:
|Thickness||50.8 micrometers (2 mil)|
|Basic Weight (g/m²)||100|
|Tensile Strength - max. (MPa)||32 (MD), 32 (TD) - Method: ASTM D 882|
|Non-Std Modulus (MPa)||266 (MD), 251 (TD) - Method: ASTM D 882|
|Elongation to Break (%)||343 (MD), 352 (TD) - Method: ASTM D 882|
|Hydrogen Crossover (ml/min·cm²)||< 0.010|
|Specific Gravity (23 °C, 50% RH)||1.97|
|Available Acid Capacity (meq/g)||0.92 min.|
|Total Acid Capacity (meq/g)||0.95 to 1.01|
|Water content (% water)||5.0 ± 3.0% - Method: ASTM D 570|
|Water uptake (% water)||50.0 ± 5.0% - Method: ASTM D 570|
|Linear Expansion % increase - 50% RH, 23°C to water soaked 23°C||10 - Method: ASTM D 570|
|Linear Expansion % increase - 50% RH, 23°C to water soaked 100°C||15 - Method: ASTM D 570|