Development of low-cost biodegradable films from corn starch and date palm pits (Phoenix dactylifera)

This study was conducted to produce a new biodegradable film from easily available and low-cost raw materials by casting method. Corn starch and date pits powder (DPP) in the proportions of 100:0, 90:10, 80:20, 70:30, and 60:40% (w/w) were used. Physical, mechanical, barrier, morphological and antioxidant properties of the developed films were evaluated. The incorporation of DPP increased the thickness, tensile strength, Young's modulus, phenolic compounds, and antioxidant activity of the films, but decreased their swelling index, water solubility, water vapor permeability and elongation capacity. An increase in DPP content decreased the L* values and increased the a*, b*, and Delta E values of the films. SEM images showed that the addition of DPP up to 30% improved the morphological properties of the films. All the developed films were totally biodegradable. This study revealed the potential use of DPP with corn starch for composite biodegradable films formulation.