聚乳酸-聚己内酯/茶多酚复合膜的性能研究

Study on the characteristic of polylactide-poly ( ε-caprolactone) /tea polyphenol composite film

摘要: 以聚乳酸-聚己内酯共聚物和茶多酚为原料,制备了聚乳酸-聚己内酯/茶多酚活性包装膜材料,测定了不同茶多酚含量对膜的理化性质和抗氧化性能的影响。红外光谱谱图说明茶多酚与聚乳酸-聚己内酯共聚物基质间发生相互作用。扫描电镜结果表明,聚乳酸-聚己内酯共聚物和茶多酚共混成膜时,茶多酚均匀分散。添加天然抗氧化剂茶多酚,在一定程度上降低了复合膜的水蒸气阻隔性能和透明度,却有效提高其柔韧性和抗氧化活性。

Abstract: Polylactide- poly ( ε- caprolactone) /tea polyphenol composite film was prepared with polylactide- poly ( ε-caprolactone) copolymer and tea polyphenol.Physiochemical properties and antioxidant abilities were tested.FTIR results revealed that there were interactions between tea polyphenol and polylactide- poly ( ε-caprolactone) copolymer.SEM images showed that tea polyphenol homodispersed in matrix.The results indicated that water vapor barrier properties and transparency of composite films were decreased, flexibility and antioxidant abilities were improved.