Abstract— The aim of this study has been devoted to the study of electrospun polymeric nanofiber mats that can be potentially used in active packaging. A previous characterization of the PVA solutions was carried out. Thus, density, electrical conductivity and viscosity have been measured as a function of PVA concentration (0, 4, 7 and 10% w/w). Subsequently, a standard electrospinning process was carried out. The fibber diameter was determined by analyzing high-resolution images from Scanning Electron Microscopy (SEM) using Image J software. Moreover, a characterization of tensile properties (by means of DMA) and vapour sorption capacity of PVA-based nanofiber mats was performed. In addition, water-soluble compounds were incorporated into electrospun nanofiber mats. Although they may induce marked changes in morphology, their incorporation may lead to marked improvements in techno-functional properties. Thus, addition of Sodium Carbonate (SC) involves occurrence of beads, due to the increase in electrostatic charges, whereas Citric Acid (CA) induce an increase in fibber size, related to a loss of solvent evaporation efficiency. However, both compounds significantly enhance water vapour absorption capacity.
Keywords— Electrospinning, DMA, Nanofibers, Active Packaging, PVA.
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