Preparation of the polymer nano-non-wovens
The solution of the gelatin of the concentration of 15%mas in the 9:1 (g/g) mixture of acetic acid and formic acid was prepared. The polymer was solved for 24 h at room temperature while stirring with a magnetic stirrer.
The electrospinning process was conducted in the horizontal mode. Two syringe pumps (New Era Pump Systems, NE-1000, and KD Scientific KDS-100–CE) were placed on the opposite sides of a grounded rotating drum collector. High voltage was provided by two generators that were connected with a positive terminal to stainless steel needles. Distance between needles and collectors was 15 cm with a flow rate of the solution on both sides counted to 2 mL/h and an inner diameter of the needle of 0.34 mm. The electrospinning process was run with 15–17 kV voltage, at humidity, ca. 50% and room temperature within 22–24 °C range.