PFSA membranes are often used to separate the anodes from cathodes in electrolysis reactors or fuel cells. The PFSA 260 membranes are 260 μm thick.

PFSA 260 membranes are unreinforced films based on chemically stabilized perfluorosulfonic acid / PTFE copolymer in its acid form (H⁺). The physical properties remain the same for the chemically stabilized membranes. Compared to the unstabilized polymer, these have a much lower fluoride ion release. This means improved chemical resistance. The membrane acts as a separator and solid electrolyte in a variety of electrochemical cells. Typically, such cells require that the membrane selectively carry cations across the cell boundary. The polymer is chemically resistant and durable.

The manufacturing process enables a homogeneous membrane with even thickness. Perfluorosulfonic acid resin with a suitable molecular weight and ion exchange capacity is used for this. Typically, the membrane is used in chlorine dioxide electrolysis, copper and gold extraction, amino acid processing, caustic soda, electrodialysis and other electrolysis methods.

Membrane properties

Tensile Strength	≥40 MPa	Nach ASTM D 882
Elongation at break	≥100%	Nach ASTM D 882
Specific Gravity	1.35
Conductivity	≥0,1 S/cm	Nach GB/T 20042.3-2022
Acid Capacity	1.00±0.05 meq/g	Nach GB/T 20042.3-2022
Water Content	5.0±3.0%	Nach GB/T 20042.3-2022
Water Uptake	50.0±5.0%	Nach GB/T 20042.3-2022
Thickness Change at 23°C, from 50% RH, 23°C water soaked	≤5%	Nach GB/T 20042.3-2022
Thickness Change at 23°C, from 50% RH, 23°C water soaked	≤10%	Nach GB/T 20042.3-2022
Linear expansion at 23°C, from 50% RH, 23°C water soaked	≤2%	Nach GB/T 20042.3-2022
Linear expansion at 100°C, from 50% RH, 23°C water soaked	≤5%	Nach GB/T 20042.3-2022