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SEM micrographs of n-60/40 nanofibrous mats after washing in chloroform to eliminate NBR. For n-60/40_m, the cross-sectional view is shown (blue arrows: n-60/40_f nanofiber type, red arrows: n-60/40_c nanofiber type). On the top right, the washing procedure for LiCl and NBR selective removal is shown.
