Nafion 115

Brand: Chemours
Product Code: 591139

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Nafion Membrane is used to separate the anode and cathode compartment of Proton Exchange Membrane fuel cells and water electrolyzers. The thickness of this particular cation exchange membrane, Nafion 115 makes it suitable for Direct Methanol Fuel Cells (DMFC) and Electrolysis applications. Nafion 115 is 127 micrometers (5 mil) thick.

Chemours (formerly DuPont) Nafion® 115 membranes are non-reinforced films based on chemically stabilized perfluorosulfonic acid/PTFE copolymer in the acid (H+) form. The physical properties remain the same for the chemically stabilized membranes, which 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.

Nafion 115, 117, and 1110 Membrane Properties Sheet

Handling and Storage of Chemours Nafion Perfluorinated Membranes

Nafion Membrane Technical Bulletin No. 93-01 for "DRY" H+ Membrane Pretreatment

Membrane Properties
Thickness 127 micrometers (5 mil)
Basic Weight (g/m²) 250
Tensile Strength - max. (MPa) 43 (6.2) in MD, 32 (4.6) in TD - Method: ASTM D 882
Non-Std Modulus (MPa) 249 (36) - Method: ASTM D 882
Elongation to Break (%) 225 (MD), 310 (TD) - Method: ASTM D 882
Tear Resistance - Initial (g/mm) 6000 (MD, TD) - Method: ASTM D 1004
Tear Resistance - Propagating (g/mm) >100 (MD), >150 (TD) - Method: ASTM D 1922
Specific Gravity (23 °C, 50% RH) 1.98
Available Acid Capacity (meq/g) 0.90 min
Total Acid Capacity (meq/g) 0.95 to 1.01
Conductivity (S/cm) 0.10 min
Membrane Hydrolytic Properties
Water content (% water) 5.0 - Method: ASTM D 570
Water uptake (% water) 38.0 - Method: ASTM D 570
Linear Expansion % increase - 50% RH, 23°C to water soaked 23°C 10.0 - Method: ASTM D 756
Linear Expansion % increase - 50% RH, 23°C to water soaked 100°C 15.0 - Method: ASTM D 756

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