Pectin-based films produced by electrospraying

Electrospraying technique was used for the production of pectin films obtaining transparent and flexible products with thicknesses of 23.4 ± 3.04 μm and requiring a lower pectin solution volume (2.67 × 10^-3 mL) than casting (5.97 × 10^-3 mL) to produce films of the same area and thickness; the physical, structural, and thermal characteristics of these films were evaluated. Electrosprayed films were slightly more transparent, and with smoother surface than those obtained by casting, but with more and smaller internal pores, resulting in different film densities (0.7 g/cm³ electrospraying, 1.7 g/cm³ casting), that could be linked to the larger water vapor permeability value obtained. These changes could be related to a physical phenomenon, seeing as the percentage of crystallinity and melting temperature remained invariable for both films. These results show that the electrospraying technique has potential in areas such as wound dressings, tissue engineering, and the release of drugs.