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Scanning electron microscope (SEM) observations of electrospun mats: (a) PLA-PHB, (b) PLA-PHB-OLA, (c) PLA-PHB-Cat1, (d) PLA-PHB-OLA-Cat1, (e) PLA-PHB-Cat3, and (f) PLA-PHB-OLA-Cat3; SEM observations of the cry-fracture section of (g) PHBV/PLA-PHB and (h) PHBV/PLA-PHB-OLA as well as (i,j) inner surface of PHBV/PLA-PHB-OLA.
