Study on Preparation and Performance of Pullulan Polysaccharide Composite Films
In this study,pullulan polysaccharide,ε-polylysine hydrochloride,gelatin,and glycerol were used as raw materials.Through single-factor and orthogonal design experiments,a multifactor integrated method was employed to comprehensively investigate the antibacterial activity,transparency,and thickness of the composite film,aiming to obtain an edible pullulan polysaccharide composite film with excellent antibacterial comprehensive performance.The results show that the optimal film-forming formula is pullulan polysaccharide 1.7 g/100 mL,gelatin 1.5 g/100 mL,glycerol 0.8 g/100 mL,ε-polylysine hydrochloride 0.15 g/100 mL.The edible film maintained certain rigidity while exhibiting low moisture absorption,moderate tackiness,and easy peeling,and has excellent light transmittance(88.34%)and bacteriostatic performance,among which the diameter of Escherichia coli bacteriostatic zone is 11.07 mm,Staphylococcus aureus bacteriostatic zone is 11.33 mm.
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