Developing a bioactive and biodegradable film from modified loquat (Eriobotrya japonica Lindl) seed starch

Loquat (Eriobotrya japonica Lindl) seed starch (KS)-based films obtained via casting were developed using glycerol and sorbitol as plasticizers. Higher purity starch was achieved using the alkaline steeping method. The starch characterization involved proximal composition, thermal, structural, morphological and antioxidant analyses in order to assess its impact on the film properties. Film performance was evaluated in water vapor permeability (WVP), microstructure, physical properties, antioxidant activity, opacity and solubility. KS exhibited a high yield (24%), amylose (33.61%) and phenolics compared to non-conventional starches, indicating appreciable antioxidant capacity. Film solubility and WVP were affected by the plasticizers. Alkaline starch film (KSF) plasticized with sorbitol was strong and rigid, little soluble and less permeable compared to KSF plasticized with glycerol. Therefore, while all KSF films appear as a potential material for active food packaging, and due to their antioxidant properties, KS presents itself as a highly promising starch source for application in films. [GRAPHICS] .