Antimicrobial food packaging composite films prepared from hemicellulose/polyvinyl alcohol/potassium cinnamate blends

ElsevierVolume 222, Part A, 1 December 2022, Pages 395-402International Journal of Biological MacromoleculesHighlights•

Hemicellulose based composite active films with antibacterial activity were prepared.

The films exhibited good UV shielding property and moderate oxygen barrier property.

The hygroscopicity of the composite films can be described by the GAB model.

The film showed good effect in preservation of cherry tomato during storage.

Abstract

Hemicellulose and its derivatives have attracted extensive attention as packaging materials and various methods have been utilized to improve its film formation properties. To make use of the byproduct in dissolving pulp production, hemicellulose collected from waste water was modified by carboxymethylation and blended with polyvinyl alcohol (PVA) to prepare composite film by solution casting method. Potassium cinnamate (PC) was further incorporated to endow the film with antibacterial activity. The properties of the composite films were characterized. Due to the good compatibility and intermolecular interactions, the composite film exhibited moderate oxygen barrier property (3.64–12.21 cm3 μm m−2 d−1 KPa−1). The flexibility of the film was improved compared with pure PVA film although tensile strength was decreased. The film had good UV barrier properties and good antibacterial properties due to the introduction of PC. GAB model could be used to predict moisture sorption of the composite films. Moreover, the obtained film showed good performance in cherry tomato preservation. This work provided a prospective route for utilization of hemicellulose recovered from waste water for high value-added products.

Keywords

Hemicellulose

Composite films

Antimicrobial

Food packaging

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