Fumasep FAA-3-PK-130 Reinforced Anion Exchange Membrane

Fumasep FAA-3-PK-130 is a PK-reinforced anion exchange membrane that conducts anions such as OH⁻ or Cl⁻. Its dry thickness is 110–130 µm; the reinforcement makes it mechanically robust, easy to handle and suitable for dry or wet assembly. It is delivered dry, in the bromide (Br⁻) form, as a 100 × 100 mm sheet.

Compared with its sibling FAA-3-50 it is roughly twice as thick and has higher area resistance (1.8–4.0 Ω·cm²), but it is more robust. It is preferred in cells with pressure differences, long experiments or frequent reassembly. For alkaline electrolysis and fuel cells it is converted to the OH⁻ form in NaOH or KOH before use; in that form keep it wet in a closed container to avoid carbonate formation.

Key Features

• PK-reinforced anion exchange membrane: dry thickness 110–130 µm (manufacturer data)
• High mechanical strength: tensile strength 40–80 MPa (manufacturer data)
• Ion exchange capacity 1.1–1.4 meq/g; selectivity 93–98% (manufacturer data)
• Area resistance 1.8–4.0 Ω·cm² (Cl⁻ form, 0.5 M NaCl, 25 °C)
• Very low swelling in water (0–2%); stable at pH 0–14 at 25 °C per the maker
• Can be assembled dry or wet; placing it between spacers or meshes is recommended to prevent curling
• Conversion to OH⁻ form: at least 24 h in 0.5–1.0 M NaOH or KOH (20–30 °C)

Technical Specifications

Applications

• Alkaline fuel cells and electrolyzers (slightly alkaline, 1–2 M solutions)
• Electrochemical CO₂ reduction studies
• Organic electrosynthesis in AEM electrolyzers (e.g. reduction of biomass-derived molecules)
• Electrodialysis, electrodeionization and desalination
• Salt splitting and reverse electrodialysis studies