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Cross sectional SEM images of knitted tube composite β-CD/CS porous membranes prepared at crosslinking time: 0 s (a-1), 10 s (b-1), 6 min (c-1), 10 min (d-1) and 20 min (e-1). 0 s (a-2), 10 s (b-2), 6 min (c-2), 10 min (d-2) and 20 min (e-2) were enlarged drawing of white rectangles, respectively.
