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Fabrication process for structured membranes. A SPEEK solution is cast on a microstructured mold. After solvent evaporation, the membrane is solidified and released. Membranes with L = 50, 100, 200, 400, and 800 μm and H = 50 μm and a flat membrane were made. SEM image of a structured membrane with L = 400 μm. The dotted line represents the back side of the membrane.
