Abstract

Bio-based solution cast green blend films were prepared using potato starch (PS) and gelatin using Propylene
Glycol as a plasticizer. The effect of the gelatin content on mechanical properties (tensile strength [TS] and %
of elongation) were investigated. The moisture content and water solubility of the pure and blend films was also
determined. The ternary blend containing 30% of gelatin content resulted in films with high TS when compared
to other films. Increasing gelatin concentrations increased TS, reduced elongation at break and decreased water
solubility and moisture of the blended films. Thermogravimetric analyses thermograms and scanning electron
microscopy micrographs confirmed improved thermal stability and homogeneity of PS-gelatin films. These results
indicated good compatibility between the molecules of PS and gelatin at the 30% of PS/gelatin blend films.