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Fumasep FAM is a heterogeneous anion-exchange membrane – PP-reinforced – thickness 450 – 500 µm, with high selectivity and very high mechanical stability. The polymer backbone of this membrane is based on a proprietary hydrocarbon resin.
Fumasep FAM membrane comes in either a 10cm x 10cm or 20cm x 30cm size sheet.
Fumatech membranes are highly sensitive to differences in humidity and moisture content. Therefore the membranes can vary +/- 0.5cm from the original cut sizes. Also due to this sensitivity the manufacturer expects wrinkles to form, however soaking the membranes in deionized water will return the membranes to the full size planar state according to the manufacturer.
• Applications: Electrocoating, electroplating, electrodeionisation, electrodialysis for demineralisation, desalination and others.
• Anion Exchange Membrane
• Stability range: pH = 1 – 10 at T = 25 °C.
• Thickness (dry): 450 – 500 micrometers (17.7 - 19.6 mil)
• Sizes: 10cm x 10cm, 20cm x 30cm
The membrane is the thin brown foil, delivered in between paper layers. Carefully separate the membrane from the paper layers. The membrane is delivered in dry form.
Keep membrane package closed / sealed when unused. Store, handle and process the membrane in a clean and dust-free area. Use only new and sharp knives or blades, when cutting the membrane. Always wear protective gloves when handling the membrane. Handle with care, be sure not to puncture, crease or scratch the membrane, otherwise leaks will occur. All surfaces in contact with the membrane during handling, inspection, storage and mounting must be smooth and free of sharp projections.
Dry form: Storage for long time scale (> 12 month) may be done in dry state (sealed container). Wet form: Storage for short and medium time scale (hours up to several weeks) may be done in unsealed containers in 0.5 – 1.5 wt% NaCl solution or comparable neutral pH electrolytes. For storage over a longer time period a sealed container is recommended using afore said electrolyte with additional sodium sulfite (Na2SO3) in concentration 1 – 3 wt% to avoid biological fouling.
The membrane is delivered in bromide form and dry form. Depending on application and cell design, assembling is possible in dry (without pretreatment) or wet form. Pretreatment before assembling: Put the membrane sample between stabilizing meshes / spacers (in order to avoid curling) in NaCl solution - e.g. 0.5 M NaCl solution at T = 25 °C for 72 hrs exchanging several times the solution. Do not let the membrane dry out since micro-cracks may likely occur during shrinkage.
If you have any concerns about storage, chemical stability, pre-treatment or before proceeding, please feel free to contact us for further information.
Please note that a current lead time of four to six weeks is to be expected.
|Membrane||Anion Exchange Membrane|
|Thickness||450 – 500 µm (microns)|
|Appearance / Color||Light yellow|
|Reinforcement||PP (polypropylene fabrics)|
|Specific Conductivity||> 1.7 mS cm^-1 (Cl^-1 form)|
|Ion Exchange Capacity||1.2 – 1.4 meq g^-1|
|Selectivity||< 96 % (0.1 / 0.5 mol/kg KCl at T = 25 °C)|
|Uptake in H2O at 25°C||< 20 wt %|
|Dimensional Swelling in H2O at 25°C||< 2 %|
|Proton Transfer Rate||> 50 nmol min^-1 cm^-2|
|Bubble Point Test in Water at 25°C||> 3 bar|
|pH Stability Range at 25°C||1 – 10 pH|
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