Physical properties and bioactivities of chitosan/gelatin-based films loaded with tannic acid and its application on the preservation of fresh-cut apples

By Changcai Zhang, Zhikun Yang, Jiyong Shi, Xiaobo Zou, Xiaodong Zhai, Huang Xiaowei, Liang Zhihua, M. Holmes, M. Daglia, Jianbo Xiao. LWT, 2021

154 citations recorded by the source corpus.

Abstract The aim of this research is to develop composite (CG-TA) films by using chitosan (CS)/gelatin (GL)/tannic acid (TA), for fresh-cut apples preservation. TA was used as the crossing-linking agent to improve the mechanical and barrier properties, and as the active substance to improve the anti-ultraviolet and antioxidant abilities of the chitosan/gelatin (CG) film. With the incorporation of TA from 0 to 1 wt%, the tensile strength of the CG film was increased while the water vapor and oxygen permeability of the film were decreased. The CG-TA films containing more than 0.5 wt% of TA could effectively block most of UV light. The DPPH radical scavenging assay significant increased to 89.3 % when the concentration of TA reached 2 wt%. Finally, CG and CG-TA films, as an active packaging material, were used to preserve the cold-stored fresh-cut apples. Compared with CG film, the CG-TA films obtained better performance on decreasing weight loss, delaying browning degree, inhibiting the lipid oxidase activity and decreasing the malondialdehyde content during 10 d of storage under 4 °C. Therefore, CG-TA films were expected to be a new active packaging material for preserving fresh-cut apples.

Subfields: Biochemistry, Biomaterials, Plant Science

View Paper: https://www.semanticscholar.org/paper/46016052cc93ba3346eefe1af4f3d7f9e0996fd9