Fumapem F-950

Please note that this product has been discontinued and we are completely out of stock. Fumapem F-950 membrane is a Long Side Chain - Per-Fluorinated Sulfonic Acid (LSC-PFSA) cation exchange membrane (CEM) with low resistance, high mechanical stability, high selectivity and high chemical / oxidative stability. Fumapem F-950 is a thin longside-chain non-reinforced membrane that is designed for use in stationary hydrogen PEM fuel cell applications. Fumapem F-950 Features: • Applications: Designed for Stationary Proton Exchange Membrane Fuel Cell applications. • Cation Exchange Membrane • Equivalent Weight of 950 (g/eq) • Long Side Chain - Per-Fluorinated Sulfonic Acid (LSC-PFSA) • Thickness: 50 micrometers (1.97 mil) • Size: 19cm x 30cm or 10 cm x 10cm Fumapem F-950 Technical Specification Sheet Delivery: The membrane is the colorless, transparent foil, delivered on a backing layer (colourless rigid PET foil). Carefully pull off the membrane from the backing foil. The membrane must be activated before use. 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. 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. 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 H-form and dry form (non-activated). 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.

Membrane Properties

Membrane	Cation Exchange Membrane
Thickness	114 - 124 µm (microns)
Appearance / Color	Transparent / Colorless
Backing Foil	PET Foil
Delivery Form	Dry
Reinforcement	None
Counter Ion	H-form
Density	2.4 mg•cm-2
Selectivity	93 - 94 %
Proton Transfer Rate	6910 µmol•min-1•cm-2
Ion Exchange Capacity	0.88 - 0.91 meq•g-1
Dimensional Swelling in H2O at 25°C	13 - 14 %
Uptake in H2O at 25°C	24 wt %
Non-Std Modulus (MPa)	205 - 218 MPa
Tensile Strength - max. (MPa)	27 - 31 MPa
Yield Strength at 23°C / 50 % R.H.	9 MPa
Elongation to Break (%)	235 - 277 %
Bubble Point Test in Water at 25°C	> 3 bar