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Fumapem F-14100 membrane is a non-reinforced Per-Fluorinated Sulfonic Acid (PFSA) / PTFE copolymer Cation Exchange Membrane (CEM) with low resistance, high mechanical stability, and high stability in acidic environment.
Fumapem F-14100 membrane comes in a 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: Direct Methanol Fuel Cells (DMFC), Electrolysis, Redox-Flow Battery, e.g. Vanadium-Redox-Flow Battery (VRB), using aqueous acidic conditions. Membrane is not stable under alkaline conditions.
• Cation Exchange Membrane
• Thickness: 100 micrometers (3.94 mil)
• Size: 20cm x 30cm
The membrane is the colourless, transparent foil, delivered on a backing foil (colourless rigid PET foil). Pull off carefully the membrane from the backing foil. For DMFC application the membrane must be activated before use.
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.
The membrane is delivered in H-form and dry form.
Direct Methanol Fuel Cell (DMFC) Applications: For optimum performance and lowest resistance it is necessary to pretreat the membrane according to the following prescription: Put the membrane sample in an aqueous 10 wt% HNO3 solution or in 5 vol % H2SO4 solution at minimum 80°C for at least 12 hours. After rinsing with demineralized water (pH ~ 7) the membrane is ready for use (activated). Membranes will expand and contract based on moisture content.
VRF Battery Applications: The membrane does not need any pretreatment and is ready for use. Please assemble the membrane in 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.
Please note that a current lead time of one to two weeks is to be expected.
|Membrane||Cation Exchange Membrane|
|Thickness||100 - 200 µm (microns)|
|Appearance / Color||Transparent / Colorless|
|Backing Foil||PET Foil|
|Tensile Strength - max. (MPa)||20 - 40 MPa|
|Equivalent Weight (EW)||1400 g/eq|
|Non-Std Modulus (MPa)||250 - 400 MPa|
|Yield Strength at 23°C / 50 % R.H.||10 - 20 MPa|
|Elongation to Break (%)||> 300 %|
|Specific Area Resistance||0.2 - 0.3 (in H2O at 25°C in H-form) Ω•cm2|
|Specific Conductivity||60 - 70 (in H2O at 25°C in H-form) mS•cm-1|
|Ion Exchange Capacity||0.6 - 0.8 meq•g-1|
|Selectivity||> 96 %|
|Uptake in H2O at 25°C||15 - 25 (in H2O at 25°C in H-form) wt %|
|Dimensional Swelling in H2O at 25°C||4 - 6 (in H2O at 25°C in H-form) %|
|Bubble Point Test in Water at 25°C||> 4 bar|
|pH Stability Range at 25°C||0 - 10 pH|
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