Durable functional fish gelatin film using biomass-derived liquid hydrolysate as an eco-friendly crosslinker

In the replacement of petroleum-based non-degradable polymers with natural biopolymers, insufficient physicochemical performance and functionality are representative factors limiting their realization. Herein, an eco-friendly fish gelatin/liquid hydrolysate composite film (FG/H film) with improved physicochemical properties and added functionality was prepared by utilizing liquid hydrolysate derived from Miscanthus . The liquid hydrolysate mainly comprised xylose derived from hemicellulose and extracted lignin and could be widely applied as a solvent and crosslinker and improve the functionalization of the fish gelatin film. The Maillard reaction between the liquid hydrolysate and gelatin decreased the moisture vulnerability and improved the structural stability of the existing gelatin. Compared with pure gelatin, the mechanical properties of the prepared FG/H film were significantly imp…