Physical and antibacterial properties of corn distarch phosphate/carboxymethyl cellulose composite films containing tea polyphenol

摘要

Antibacterial packaging films were developed by incorporating tea polyphenol (TP)into corn distarch phosphate (CDP)/carboxymethyl cellulose (CMC) films via solventcasting. Incorporation of TP had a great influence on the physical properties of thecomposite films. The prepared composite films were evaluated by scanning electronmicroscopy and Fourier transform infrared spectroscopy, and their physical properties,moisture barrier properties, and antibacterial activities were investigated.Microstructural studies revealed that the surface of the CDP/CMC/TP compositefilms became rough and uneven sponge-like. Attenuated total reflectance Fouriertransform infrared exhibited interactions between TP and CDP/CMC films matrixwas caused by hydrogen bonding. Addition of TP into CDP/CMC films improvedthe extensibility, toughness, and moisture barrier properties of the composite filmsgreatly. The CDP/CMC/TP composite films showed excellent antibacterial activityagainst Staphylococcus aureus, Bacillus subtilis, and Escherichia coli. The CDP/CMC/TPfilms are promising functional packaging materials.