普鲁兰多糖复合膜的制备及性能研究

Study on Preparation and Performance of Pullulan Polysaccharide Composite Films

本研究以普鲁兰多糖、ε-聚赖氨酸盐酸盐、明胶和甘油为原料,通过单因素和正交设计,采用多因素综合评价法,综合考察复合膜的抑菌性、透光度和膜厚等参数,以期获得一种综合性能良好的可食用普鲁兰多糖复合膜。试验结果表明,最佳成膜配方为普鲁兰多糖1.7 g/100 mL、明胶1.5 g/100 mL、甘油0.8 g/100 mL、ε-聚赖氨酸盐酸盐0.15 g/100 mL,该配方条件下制备的可食用膜,在保持膜刚性的同时,不吸潮,黏性适中,易揭膜,具有优良的透光率(88.34%)和抑菌性能,其中对大肠杆菌抑菌圈直径为11.07 mm,金黄色葡萄球菌抑菌圈直径为11.33 mm。

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 11.07mm,Staphylococcus aureus bacteriostatic zone is 11.33mm.