*2.4. Contact Angle*

The contact angle was determined using the video goniometer (Rame-Hart instrument co., Succasunna, NJ, USA) to determine the hydrophobicity of the films [10]. A 5-µL drop of deionized water was placed on the opaquest side of a film sample (the side in contact with the mold) with dimensions of 3 cm × 1.5 cm, using a micropipette, and six measurements were recorded. Subsequently, with a program created using LabVIEW 2014 software, the image was captured, and angles formed by the water droplets on the film were calculated using ImageJ software.
