Biological film as well as preparation method and application thereof

The invention relates to a food packaging technology, and discloses a biological film as well as a preparation method and application thereof. The biological film contains the following raw material components: pitaya peel crude polysaccharide, punicalagin, a plasticizer and a solvent. The preparation method of the biological film comprises the following steps: mixing pitaya peel crude polysaccharide, punicalagin, a plasticizer and a solvent to obtain composite film slurry; and carrying out solid-liquid separation IV on the composite film slurry to obtain film-forming slurry, and carrying out reverse mold drying on the film-forming slurry. The biological film provided by the invention has the advantages of high hydrophobicity, good corrosion resistance, biological adhesion resistance, self-cleaning capability and long service life, and can be applied to food packaging. 本发明涉及食品包装技术，公开了一种生物薄膜及其制备方法和应用。该生物薄膜含有以下原料组分：火龙果皮粗多糖、安石榴苷、增塑剂和溶剂。生物薄膜的制备方法，包括以下步骤：将火龙果皮粗多糖、安石榴苷、增塑剂与溶剂混合，得到复合膜浆液；将所述复合膜浆液进行固液分离IV得到成膜浆液，将所述成膜浆