• Fumasep FAD-55

Fumasep FAD-55 is a non-reinforced Anion Exchange Membrane (AEM) with low resistance, high acid transfer rate, high mechanical stability, and high stability in acidic environment. The polymer backbone for this membrane is based on a proprietary hydrocarbon resin.

Fumasep FAD-55 membrane comes in either a 10cm x 10cm or 20cm x 30cm size sheet. The membrane is the brown foil delivered on a backing layer (colourless rigid PET foil). Peel off carefully the membrane from the backing layer.

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.

Fumasep FAD-55 Features:
 

 • Applications: Diffusion dialysis for acidic solutions.
 • Anion Exchange Membrane
 • Thickness: 50 - 60 micrometers (1.97 - 2.36 mil)
 • Sizes: 10cm x 10cm, 20cm x 30cm

Fumasep FAD-55 Technical Data Sheet

Handling:

Keep membrane package closed / sealed when unused. Unpack membrane only for direct use and process immediately after opening. Store, handle and process the membrane in a clean and dust-free area. 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 which may get into contact with the membrane during inspection, storage, pretreatment and mounting must be free of sharp edges or angles.

Storage:

Dry Form: The membrane can be stored dry for an unlimited amount of time. However, the membrane has to be conditioned (washed and rinsed) prior to use.

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 biocide to avoid biological fouling.

Membranes will expand and contract based on water / electrolyte content. To eliminate wrinkling, it is necessary to expand membranes before mounting by pretreatment.

Pre-Treatment and Conditioning:

The membrane is delivered in bromide form and dry form. The membrane changes dimensions based on its water content. Consequently, it is necessary to perform a pretreatment procedure to ensure that the proper fit is attained in the cell. For most applications, membranes should be expanded by soaking in NaCl solution (0.5 - 1.5 wt% NaCl solution) at T = 25 °C for 24 hrs exchanging the solution several times. Avoid folding or wrinkling membranes during pretreatment, e.g. by using stabilizing meshes / spacers. When assembling and during cell operation do not let the membrane dry out since microcracks may likely occur during shrinkage.

If you have any concerns about storage, chemical stability and pretreatment before proceeding, please feel free to contact us for further information.

Membrane Properties
Membrane Anion Exchange Membrane
Thickness 50 - 60 µm (microns)
Appearance / Color Light Brown
Backing Foil PET
Delivery Form Dry
Reinforcement None
Counter Ion Bromide (Br-)
Specific Area Resistance 0.20 - 0.25 (in Cl- form) Ω•cm2
Specific Conductivity 25 - 30 (in Cl- form) mS•cm-1
Selectivity 85 %
Proton Transfer Rate 8000 - 10000 µmol•min-1•cm-2
Ion Exchange Capacity 2.0 - 2.5 (in Cl- form) meq•g-1
Dimensional Swelling in H2O at 25°C 4 - 8 %
Uptake in H2O at 25°C 58 wt %
Non-Std Modulus (MPa) 700 - 900 MPa
Tensile Strength - max. (MPa) 24 - 26 MPa
Yield Strength at 23°C / 50 % R.H. 24 - 26 MPa
Elongation to Break (%) > 10 %
Bubble Point Test in Water at 25°C 2.5 bar

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Fumasep FAD-55

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