Nafion™ membranes are often used to separate the anodes from the cathodes in electrolysis reactors or fuel cells. The thickness of the cation exchange membrane makes Nafion™ 212 ideal for hydrogen fuel cells. Nafion™ 212 is 50.8 µm thick.

Chemours^® (formerly DuPont^®) Nafion™ NR212 membranes are unreinforced films based on chemically stabilized perfluorosulfonic acid / PTFE copolymer in its acid form (H⁺). The physical properties of the chemically stabilized membranes remain the same. Compared to the unstabilized polymer, these have a significantly lower fluoride ion release. That means improved chemical resistance. Nafion™ PFSA membranes are widely used for proton exchange membranes (PEM) in fuel cells and electrolysis reactors. The membrane acts as a separator and solid electrolyte in a large number of electrochemical cells. Typically, such cells require that the membrane selectively transport cations across the cell boundary. The polymer is chemically resistant and durable. We give a discount when purchasing 5, 10 or 20 pieces.

The standard size is 30 x 30 cm. Other dimensions are available on request.

Membrane Properties
Thickness	50.8 microns (5 mil)
Weight (g / m²)	250
Tensile Strenght - max. (MPa)	32 (MD), 32 (TD) - method: ASTM D 882
Non-Standard-Module (MPa)	266 (MD), 251 (TD) - method: ASTM D 882
Elongation at Break (%)	225 (MD), 310 (TD) - method: ASTM D 882
Hydrogen crossover (ml/minxcm²)	< 0.010
Specific Weight (23 °C, 50% RH)	1,97
Available Acid Capacity (meq / g)	0.92 min
Total Acid Capacity (meq / g)	0.95 bis 1.01
Membranolytic Properties
Water Content (% Water)	5.0±3.0% - method: ASTM D 570
Swelling (% Water)	50.0±5.0% - Methode: ASTM D 570
Linear Expansion % Increase - 50% RH, 23 °C	10.0 - method: ASTM D 756
Linear Expansion % Increase - 50% RH, 23 °C to 100 °C	15.0 - method: ASTM D 756