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SEM images (A to D) and fibre diameter distribution histograms (E to H) for the different crosslinked co-axial fibre membranes 2PU10GE (A & E), 4PU10GE (B & F), 6PU10GE (C & G) and 8PU10GE (D & H) respectively. Average fibre diameters for each membrane were significantly different from all other membranes (p<0.05).
