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Fumasep FKS-PET-130 is a PET reinforced Cation Exchange Membrane (CEM) with low resistance, high selectivity, very high mechanical stability, and high stability in pH neutral and acidic environment. The polymer backbone for this membrane is based on a proprietary hydrocarbon resin.
Fumasep FKS-PET-130 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: Electrodialysis for demineralisation, desalination, acid recovery applications and others.
• Cation Exchange Membrane
• Stability Range (pH) at 25°C: 0 - 8
• Thickness: 130 micrometers (5.12 mil)
• Sizes: 10cm x 10cm, 20cm x 30cm
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: 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 ca. 100 ppm biocide (NaN3) to avoid biological fouling.
The membrane is delivered in H+ form and dry form. Depending on application and cell design, assembling is possible in dry form (without pretreatment) or wet form. For optimum performance it is recommended to rinse the membrane in NaCl solution (e.g. 0.5 M NaCl solution at 25°C for 24 hrs) to remove any additive from the membrane. Place the membrane sample between stabilizing meshes / spacers in order to avoid curling. Do not let the membrane dry out since micro-cracks 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.
Please note that a current lead time of one to two weeks is to be expected.
|Membrane||Cation Exchange Membrane|
|Thickness||110 - 130 µm (microns)|
|Appearance / Color||White|
|Tensile Strength - max. (MPa)||60 - 80 MPa|
|Density||8.5 - 10.5 mg•cm-2|
|Non-Std Modulus (MPa)||1300 - 1900 MPa|
|Yield Strength at 23°C / 50 % R.H.||20 - 25 MPa|
|Elongation to Break (%)||20 - 40 %|
|Specific Area Resistance||2.6 - 4.6 (in Na+ form) Ω•cm2|
|Specific Conductivity||2.5 - 4.5 (in Na+ form) mS•cm-1|
|Ion Exchange Capacity||0.75 - 0.85 (in Na+ form) meq•g-1|
|Selectivity||96 - 99 %|
|Uptake in H2O at 25°C||15 - 25 wt %|
|Dimensional Swelling in H2O at 25°C||0 - 1 %|
|Hydroxyl Transfer Rate||10 - 30 µmol•min-1•cm-2|
|Bubble Point Test in Water at 25°C||> 3 bar|
|pH Stability Range at 25°C||0 - 8 pH|
|Residual Solvent / Additive Content||< 15 %|
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