High-Performance Cation-Exchange Membrane (CEM, PF-CA089) with Hierarchical Perfluoro-Sulfonic/Carboxylic Acid for Chlorine-Alkali Electrolysis, CCAECEMHPSCA
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A hierarchical perfluoro-sulfonic/carboxylic acid composite cation-exchange membrane represents the pinnacle of separator technology for industrial chlor-alkali electrolysis. Modern high-performance membranes (such as advanced Nafion or Flemion grades) utilize this engineered, graded architecture to simultaneously optimize bulk conductivity and extreme chemical rejection.
Unlike single-layer polymer films, these advanced membranes feature a multi-zone, chemically asymmetric profile built on a robust fluorocarbon backbone: (1) Reinforced ePTFE Substrate: An embedded micro-porous expanded polytetrafluoroethylene mesh runs through the core, providing exceptional mechanical tensile strength and preventing membrane creep or dimensional distortion under high hydraulic and osmotic pressures. (2) Thick Anode-Facing Sulfonic Acid Layer (PFSA): Comprising the bulk of the membrane thickness, this layer features perfluorosulfonic acid groups (-SO3H). It provides low electrical resistance, high water uptake, and rapid transport channels for sodium ions (Na+) coming from the saturated brine compartment. (3) Thin Cathode-Facing Carboxylic Acid Layer (PFCA): A specialized, dense surface layer facing the high-concentration caustic side, functionalized with perfluorocarboxylic acid groups (-COOH).
The key advantages of the composite CEM are: (1) Ultra-High Current Efficiency: Exceptional Donnan exclusion across the hierarchical boundary maintains current efficiencies consistently above 93% to 96%. (2) Minimized Cell Voltage & Energy Consumption: Careful control of layer thickness and equivalent weight keeps area electrical resistance low, directly reducing Joule heating and electric power consumption during high-amperage industrial runs (3000 to 5000 A/m2). (3) Superior Chemical and Oxidative Resilience: The fully fluorinated C-F backbone withstands continuous exposure to wet chlorine gas (Cl2), hypochlorous acid, nascent oxygen, and hot concentrated caustic solutions without polymer chain degradation.
| Part Number |
CCAECEMHPSCA (C-CAE-CEM-HPSCA) |
| Brand Series |
CEM (PF-CA089) |
| Membrane Thickness (Wet) |
150 ~ 280 um ePTFE reinforce layer is presented |
| Electrical Resistance |
< 1.1 Ω*cm2 |
| Maximum Current |
5800 A/m2 |
| Current Efficiency |
Electrolysis Voltage: 2.96 V, current efficiency>96% (zero-gap, 5.5 kA/m2, 85°C, 100cm2 effective area, output concentration at cathode & anode port is 31.8-32.2 % and 210 g/L, respectively) |
| Operation Temperature & pH |
<85°C, pH: 0-14 |
| Notes |
The marked side must face to the anode. The membranes should be immersed in the 2-4% Na2CO3/NaHCO3 solution or 0.4% NaOH solution. Keep it in hydration status. |
| Package Grade |
L10-30cm*W10-30cm/pcs/pack |
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